diff options
Diffstat (limited to 'source/blender/editors/sculpt_paint/paint_vertex.cc')
| -rw-r--r-- | source/blender/editors/sculpt_paint/paint_vertex.cc | 4217 |
1 files changed, 4217 insertions, 0 deletions
diff --git a/source/blender/editors/sculpt_paint/paint_vertex.cc b/source/blender/editors/sculpt_paint/paint_vertex.cc new file mode 100644 index 00000000000..6bdd4cbc268 --- /dev/null +++ b/source/blender/editors/sculpt_paint/paint_vertex.cc @@ -0,0 +1,4217 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * Copyright 2001-2002 NaN Holding BV. All rights reserved. */ + +/** \file + * \ingroup edsculpt + * + * Used for vertex color & weight paint and mode switching. + * + * \note This file is already big, + * use `paint_vertex_color_ops.c` & `paint_vertex_weight_ops.c` for general purpose operators. + */ + +#include "MEM_guardedalloc.h" + +#include "BLI_array_utils.h" +#include "BLI_color.hh" +#include "BLI_color_mix.hh" +#include "BLI_listbase.h" +#include "BLI_math.h" +#include "BLI_rect.h" +#include "BLI_string.h" +#include "BLI_task.h" +#include "BLI_task.hh" + +#include "DNA_brush_types.h" +#include "DNA_mesh_types.h" +#include "DNA_object_types.h" +#include "DNA_particle_types.h" +#include "DNA_scene_types.h" + +#include "RNA_access.h" +#include "RNA_prototypes.h" + +#include "BKE_attribute.h" +#include "BKE_brush.h" +#include "BKE_colortools.h" +#include "BKE_context.h" +#include "BKE_deform.h" +#include "BKE_layer.h" +#include "BKE_lib_id.h" +#include "BKE_main.h" +#include "BKE_mesh.h" +#include "BKE_mesh_mapping.h" +#include "BKE_modifier.h" +#include "BKE_object.h" +#include "BKE_object_deform.h" +#include "BKE_paint.h" +#include "BKE_report.h" +#include "BKE_subsurf.h" + +#include "DEG_depsgraph.h" + +#include "WM_api.h" +#include "WM_message.h" +#include "WM_toolsystem.h" +#include "WM_types.h" + +#include "ED_armature.h" +#include "ED_mesh.h" +#include "ED_object.h" +#include "ED_screen.h" +#include "ED_view3d.h" + +/* For IMB_BlendMode only. */ +#include "IMB_imbuf.h" + +#include "BKE_ccg.h" +#include "bmesh.h" + +#include "paint_intern.h" /* own include */ +#include "sculpt_intern.h" + +using blender::IndexRange; +using namespace blender; +using namespace blender::color; + +/* -------------------------------------------------------------------- */ +/** \name Internal Utilities + * \{ */ + +static ColorPaint4b uint2color(uint c) +{ + uchar *rgba = (uchar *)&c; + return ColorPaint4b(rgba[0], rgba[1], rgba[2], rgba[3]); +} + +static uint color2uint(ColorPaint4b c) +{ + return *(reinterpret_cast<uint *>(&c)); +} + +static bool isZero(ColorPaint4f c) +{ + return c.r == 0.0f && c.g == 0.0f && c.b == 0.0f && c.a == 0.0f; +} + +static bool isZero(ColorPaint4b c) +{ + return c.r == 0 && c.g == 0 && c.b == 0 && c.a == 0; +} + +template<typename Color = ColorPaint4f> static ColorPaint4f toFloat(const Color &c) +{ + if constexpr (std::is_same_v<Color, ColorPaint4b>) { + return c.decode(); + } + else { + return c; + } +} + +template<typename Color = ColorPaint4f> static Color fromFloat(const ColorPaint4f &c) +{ + if constexpr (std::is_same_v<Color, ColorPaint4b>) { + return c.encode(); + } + else { + return c; + } +} + +/* Use for 'blur' brush, align with PBVH nodes, created and freed on each update. */ +template<typename BlendType> struct VPaintAverageAccum { + BlendType len; + BlendType value[3]; +}; + +struct WPaintAverageAccum { + uint len; + double value; +}; + +struct NormalAnglePrecalc { + bool do_mask_normal; + /* what angle to mask at */ + float angle; + /* cos(angle), faster to compare */ + float angle__cos; + float angle_inner; + float angle_inner__cos; + /* difference between angle and angle_inner, for easy access */ + float angle_range; +}; + +/* Returns number of elements. */ +static int get_vcol_elements(Mesh *me, size_t *r_elem_size) +{ + CustomDataLayer *layer = BKE_id_attributes_active_color_get(&me->id); + AttributeDomain domain = BKE_id_attribute_domain(&me->id, layer); + + if (r_elem_size) { + *r_elem_size = layer->type == CD_PROP_COLOR ? sizeof(float) * 4ULL : 4ULL; + } + + switch (domain) { + case ATTR_DOMAIN_POINT: + return me->totvert; + case ATTR_DOMAIN_CORNER: + return me->totloop; + default: + return 0; + } +} + +static void view_angle_limits_init(struct NormalAnglePrecalc *a, float angle, bool do_mask_normal) +{ + angle = RAD2DEGF(angle); + a->do_mask_normal = do_mask_normal; + if (do_mask_normal) { + a->angle_inner = angle; + a->angle = (a->angle_inner + 90.0f) * 0.5f; + } + else { + a->angle_inner = a->angle = angle; + } + + a->angle_inner *= (float)(M_PI_2 / 90); + a->angle *= (float)(M_PI_2 / 90); + a->angle_range = a->angle - a->angle_inner; + + if (a->angle_range <= 0.0f) { + a->do_mask_normal = false; /* no need to do blending */ + } + + a->angle__cos = cosf(a->angle); + a->angle_inner__cos = cosf(a->angle_inner); +} + +static float view_angle_limits_apply_falloff(const struct NormalAnglePrecalc *a, + float angle_cos, + float *mask_p) +{ + if (angle_cos <= a->angle__cos) { + /* outsize the normal limit */ + return false; + } + if (angle_cos < a->angle_inner__cos) { + *mask_p *= (a->angle - acosf(angle_cos)) / a->angle_range; + return true; + } + return true; +} + +static bool vwpaint_use_normal(const VPaint *vp) +{ + return ((vp->paint.brush->flag & BRUSH_FRONTFACE) != 0) || + ((vp->paint.brush->flag & BRUSH_FRONTFACE_FALLOFF) != 0); +} + +static bool brush_use_accumulate_ex(const Brush *brush, const int ob_mode) +{ + return ((brush->flag & BRUSH_ACCUMULATE) != 0 || + (ob_mode == OB_MODE_VERTEX_PAINT ? (brush->vertexpaint_tool == VPAINT_TOOL_SMEAR) : + (brush->weightpaint_tool == WPAINT_TOOL_SMEAR))); +} + +static bool brush_use_accumulate(const VPaint *vp) +{ + return brush_use_accumulate_ex(vp->paint.brush, vp->paint.runtime.ob_mode); +} + +static MDeformVert *defweight_prev_init(MDeformVert *dvert_prev, + MDeformVert *dvert_curr, + int index) +{ + MDeformVert *dv_curr = &dvert_curr[index]; + MDeformVert *dv_prev = &dvert_prev[index]; + if (dv_prev->flag == 1) { + dv_prev->flag = 0; + BKE_defvert_copy(dv_prev, dv_curr); + } + return dv_prev; +} + +/* check if we can do partial updates and have them draw realtime + * (without evaluating modifiers) */ +static bool vertex_paint_use_fast_update_check(Object *ob) +{ + const Mesh *me_eval = BKE_object_get_evaluated_mesh(ob); + + if (me_eval != NULL) { + Mesh *me = BKE_mesh_from_object(ob); + if (me && me->mloopcol) { + return (me->mloopcol == CustomData_get_layer(&me_eval->ldata, CD_PROP_BYTE_COLOR)); + } + } + + return false; +} + +static void paint_last_stroke_update(Scene *scene, const float location[3]) +{ + UnifiedPaintSettings *ups = &scene->toolsettings->unified_paint_settings; + ups->average_stroke_counter++; + add_v3_v3(ups->average_stroke_accum, location); + ups->last_stroke_valid = true; +} + +bool vertex_paint_mode_poll(bContext *C) +{ + Object *ob = CTX_data_active_object(C); + + if (!(ob && ob->mode == OB_MODE_VERTEX_PAINT && ((Mesh *)ob->data)->totpoly)) { + return false; + } + + CustomDataLayer *layer = BKE_id_attributes_active_color_get((ID *)ob->data); + + return layer != nullptr; +} + +static bool vertex_paint_poll_ex(bContext *C, bool check_tool) +{ + if (vertex_paint_mode_poll(C) && BKE_paint_brush(&CTX_data_tool_settings(C)->vpaint->paint)) { + ScrArea *area = CTX_wm_area(C); + if (area && area->spacetype == SPACE_VIEW3D) { + ARegion *region = CTX_wm_region(C); + if (region->regiontype == RGN_TYPE_WINDOW) { + if (!check_tool || WM_toolsystem_active_tool_is_brush(C)) { + return true; + } + } + } + } + return false; +} + +bool vertex_paint_poll(bContext *C) +{ + return vertex_paint_poll_ex(C, true); +} + +bool vertex_paint_poll_ignore_tool(bContext *C) +{ + return vertex_paint_poll_ex(C, false); +} + +bool weight_paint_mode_poll(bContext *C) +{ + Object *ob = CTX_data_active_object(C); + + return ob && ob->mode == OB_MODE_WEIGHT_PAINT && ((Mesh *)ob->data)->totpoly; +} + +static bool weight_paint_poll_ex(bContext *C, bool check_tool) +{ + Object *ob = CTX_data_active_object(C); + ScrArea *area; + + if ((ob != NULL) && (ob->mode & OB_MODE_WEIGHT_PAINT) && + (BKE_paint_brush(&CTX_data_tool_settings(C)->wpaint->paint) != NULL) && + (area = CTX_wm_area(C)) && (area->spacetype == SPACE_VIEW3D)) { + ARegion *region = CTX_wm_region(C); + if (ELEM(region->regiontype, RGN_TYPE_WINDOW, RGN_TYPE_HUD)) { + if (!check_tool || WM_toolsystem_active_tool_is_brush(C)) { + return true; + } + } + } + return false; +} + +bool weight_paint_poll(bContext *C) +{ + return weight_paint_poll_ex(C, true); +} + +bool weight_paint_poll_ignore_tool(bContext *C) +{ + return weight_paint_poll_ex(C, false); +} + +template<typename Color, typename Traits, AttributeDomain domain> +static Color vpaint_get_current_col(Scene *scene, VPaint *vp, bool secondary) +{ + Brush *brush = BKE_paint_brush(&vp->paint); + float color[4]; + const float *brush_color = secondary ? BKE_brush_secondary_color_get(scene, brush) : + BKE_brush_color_get(scene, brush); + copy_v3_v3(color, brush_color); + color[3] = 1.0f; /* alpha isn't used, could even be removed to speedup paint a little */ + + return fromFloat<Color>(ColorPaint4f(color)); +} + +uint vpaint_get_current_color(Scene *scene, VPaint *vp, bool secondary) +{ + ColorPaint4b col = vpaint_get_current_col<ColorPaint4b, ByteTraits, ATTR_DOMAIN_CORNER>( + scene, vp, secondary); + + return color2uint(col); +} + +/* wpaint has 'wpaint_blend' */ +template<typename Color, typename Traits> +static Color vpaint_blend(const VPaint *vp, + Color color_curr, + Color color_orig, + Color color_paint, + const typename Traits::ValueType alpha, + const typename Traits::BlendType brush_alpha_value) +{ + using Value = typename Traits::ValueType; + + const Brush *brush = vp->paint.brush; + const IMB_BlendMode blend = (IMB_BlendMode)brush->blend; + + Color color_blend = BLI_mix_colors<Color, Traits>(blend, color_curr, color_paint, alpha); + + /* If no accumulate, clip color adding with `color_orig` & `color_test`. */ + if (!brush_use_accumulate(vp)) { + uint a; + Color color_test; + Value *cp, *ct, *co; + + color_test = BLI_mix_colors<Color, Traits>(blend, color_orig, color_paint, brush_alpha_value); + + cp = (Value *)&color_blend; + ct = (Value *)&color_test; + co = (Value *)&color_orig; + + for (a = 0; a < 4; a++) { + if (ct[a] < co[a]) { + if (cp[a] < ct[a]) { + cp[a] = ct[a]; + } + else if (cp[a] > co[a]) { + cp[a] = co[a]; + } + } + else { + if (cp[a] < co[a]) { + cp[a] = co[a]; + } + else if (cp[a] > ct[a]) { + cp[a] = ct[a]; + } + } + } + } + + if ((brush->flag & BRUSH_LOCK_ALPHA) && + !ELEM(blend, IMB_BLEND_ERASE_ALPHA, IMB_BLEND_ADD_ALPHA)) { + Value *cp, *cc; + cp = (Value *)&color_blend; + cc = (Value *)&color_curr; + cp[3] = cc[3]; + } + + return color_blend; +} + +/* vpaint has 'vpaint_blend' */ +static float wpaint_blend(const VPaint *wp, + float weight, + const float alpha, + float paintval, + const float UNUSED(brush_alpha_value), + const short do_flip) +{ + const Brush *brush = wp->paint.brush; + IMB_BlendMode blend = (IMB_BlendMode)brush->blend; + + if (do_flip) { + switch (blend) { + case IMB_BLEND_MIX: + paintval = 1.0f - paintval; + break; + case IMB_BLEND_ADD: + blend = IMB_BLEND_SUB; + break; + case IMB_BLEND_SUB: + blend = IMB_BLEND_ADD; + break; + case IMB_BLEND_LIGHTEN: + blend = IMB_BLEND_DARKEN; + break; + case IMB_BLEND_DARKEN: + blend = IMB_BLEND_LIGHTEN; + break; + default: + break; + } + } + + weight = ED_wpaint_blend_tool(blend, weight, paintval, alpha); + + CLAMP(weight, 0.0f, 1.0f); + + return weight; +} + +static void paint_and_tex_color_alpha_intern(VPaint *vp, + const ViewContext *vc, + const float co[3], + float r_rgba[4]) +{ + const Brush *brush = BKE_paint_brush(&vp->paint); + BLI_assert(brush->mtex.tex != NULL); + if (brush->mtex.brush_map_mode == MTEX_MAP_MODE_3D) { + BKE_brush_sample_tex_3d(vc->scene, brush, co, r_rgba, 0, NULL); + } + else { + float co_ss[2]; /* screenspace */ + if (ED_view3d_project_float_object( + vc->region, + co, + co_ss, + (eV3DProjTest)(V3D_PROJ_TEST_CLIP_BB | V3D_PROJ_TEST_CLIP_NEAR)) == V3D_PROJ_RET_OK) { + const float co_ss_3d[3] = {co_ss[0], co_ss[1], 0.0f}; /* we need a 3rd empty value */ + BKE_brush_sample_tex_3d(vc->scene, brush, co_ss_3d, r_rgba, 0, NULL); + } + else { + zero_v4(r_rgba); + } + } +} + +static float wpaint_clamp_monotonic(float oldval, float curval, float newval) +{ + if (newval < oldval) { + return MIN2(newval, curval); + } + if (newval > oldval) { + return MAX2(newval, curval); + } + return newval; +} + +static float wpaint_undo_lock_relative( + float weight, float old_weight, float locked_weight, float free_weight, bool auto_normalize) +{ + /* In auto-normalize mode, or when there is no unlocked weight, + * compute based on locked weight. */ + if (auto_normalize || free_weight <= 0.0f) { + if (locked_weight < 1.0f - VERTEX_WEIGHT_LOCK_EPSILON) { + weight *= (1.0f - locked_weight); + } + else { + weight = 0; + } + } + else { + /* When dealing with full unlocked weight, don't paint, as it is always displayed as 1. */ + if (old_weight >= free_weight) { + weight = old_weight; + } + /* Try to compute a weight value that would produce the desired effect if normalized. */ + else if (weight < 1.0f) { + weight = weight * (free_weight - old_weight) / (1 - weight); + } + else { + weight = 1.0f; + } + } + + return weight; +} + +/* ----------------------------------------------------- */ + +static void do_weight_paint_normalize_all(MDeformVert *dvert, + const int defbase_tot, + const bool *vgroup_validmap) +{ + float sum = 0.0f, fac; + uint i, tot = 0; + MDeformWeight *dw; + + for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) { + if (dw->def_nr < defbase_tot && vgroup_validmap[dw->def_nr]) { + tot++; + sum += dw->weight; + } + } + + if ((tot == 0) || (sum == 1.0f)) { + return; + } + + if (sum != 0.0f) { + fac = 1.0f / sum; + + for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) { + if (dw->def_nr < defbase_tot && vgroup_validmap[dw->def_nr]) { + dw->weight *= fac; + } + } + } + else { + /* hrmf, not a factor in this case */ + fac = 1.0f / tot; + + for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) { + if (dw->def_nr < defbase_tot && vgroup_validmap[dw->def_nr]) { + dw->weight = fac; + } + } + } +} + +/** + * A version of #do_weight_paint_normalize_all that includes locked weights + * but only changes unlocked weights. + */ +static bool do_weight_paint_normalize_all_locked(MDeformVert *dvert, + const int defbase_tot, + const bool *vgroup_validmap, + const bool *lock_flags) +{ + float sum = 0.0f, fac; + float sum_unlock = 0.0f; + float lock_weight = 0.0f; + uint i, tot = 0; + MDeformWeight *dw; + + if (lock_flags == NULL) { + do_weight_paint_normalize_all(dvert, defbase_tot, vgroup_validmap); + return true; + } + + for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) { + if (dw->def_nr < defbase_tot && vgroup_validmap[dw->def_nr]) { + sum += dw->weight; + + if (lock_flags[dw->def_nr]) { + lock_weight += dw->weight; + } + else { + tot++; + sum_unlock += dw->weight; + } + } + } + + if (sum == 1.0f) { + return true; + } + + if (tot == 0) { + return false; + } + + if (lock_weight >= 1.0f - VERTEX_WEIGHT_LOCK_EPSILON) { + /* locked groups make it impossible to fully normalize, + * zero out what we can and return false */ + for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) { + if (dw->def_nr < defbase_tot && vgroup_validmap[dw->def_nr]) { + if (lock_flags[dw->def_nr] == false) { + dw->weight = 0.0f; + } + } + } + + return (lock_weight == 1.0f); + } + if (sum_unlock != 0.0f) { + fac = (1.0f - lock_weight) / sum_unlock; + + for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) { + if (dw->def_nr < defbase_tot && vgroup_validmap[dw->def_nr]) { + if (lock_flags[dw->def_nr] == false) { + dw->weight *= fac; + /* paranoid but possibly with float error */ + CLAMP(dw->weight, 0.0f, 1.0f); + } + } + } + } + else { + /* hrmf, not a factor in this case */ + fac = (1.0f - lock_weight) / tot; + /* paranoid but possibly with float error */ + CLAMP(fac, 0.0f, 1.0f); + + for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) { + if (dw->def_nr < defbase_tot && vgroup_validmap[dw->def_nr]) { + if (lock_flags[dw->def_nr] == false) { + dw->weight = fac; + } + } + } + } + + return true; +} + +/** + * \note same as function above except it does a second pass without active group + * if normalize fails with it. + */ +static void do_weight_paint_normalize_all_locked_try_active(MDeformVert *dvert, + const int defbase_tot, + const bool *vgroup_validmap, + const bool *lock_flags, + const bool *lock_with_active) +{ + /* first pass with both active and explicitly locked groups restricted from change */ + + bool success = do_weight_paint_normalize_all_locked( + dvert, defbase_tot, vgroup_validmap, lock_with_active); + + if (!success) { + /** + * Locks prevented the first pass from full completion, + * so remove restriction on active group; e.g: + * + * - With 1.0 weight painted into active: + * nonzero locked weight; first pass zeroed out unlocked weight; scale 1 down to fit. + * - With 0.0 weight painted into active: + * no unlocked groups; first pass did nothing; increase 0 to fit. + */ + do_weight_paint_normalize_all_locked(dvert, defbase_tot, vgroup_validmap, lock_flags); + } +} + +#if 0 /* UNUSED */ +static bool has_unselected_unlocked_bone_group(int defbase_tot, + bool *defbase_sel, + int selected, + const bool *lock_flags, + const bool *vgroup_validmap) +{ + int i; + if (defbase_tot == selected) { + return false; + } + for (i = 0; i < defbase_tot; i++) { + if (vgroup_validmap[i] && !defbase_sel[i] && !lock_flags[i]) { + return true; + } + } + return false; +} +#endif + +static void multipaint_clamp_change(MDeformVert *dvert, + const int defbase_tot, + const bool *defbase_sel, + float *change_p) +{ + int i; + MDeformWeight *dw; + float val; + float change = *change_p; + + /* verify that the change does not cause values exceeding 1 and clamp it */ + for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) { + if (dw->def_nr < defbase_tot && defbase_sel[dw->def_nr]) { + if (dw->weight) { + val = dw->weight * change; + if (val > 1) { + change = 1.0f / dw->weight; + } + } + } + } + + *change_p = change; +} + +static bool multipaint_verify_change(MDeformVert *dvert, + const int defbase_tot, + float change, + const bool *defbase_sel) +{ + int i; + MDeformWeight *dw; + float val; + + /* in case the change is reduced, you need to recheck + * the earlier values to make sure they are not 0 + * (precision error) */ + for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) { + if (dw->def_nr < defbase_tot && defbase_sel[dw->def_nr]) { + if (dw->weight) { + val = dw->weight * change; + /* the value should never reach zero while multi-painting if it + * was nonzero beforehand */ + if (val <= 0) { + return false; + } + } + } + } + + return true; +} + +static void multipaint_apply_change(MDeformVert *dvert, + const int defbase_tot, + float change, + const bool *defbase_sel) +{ + int i; + MDeformWeight *dw; + + /* apply the valid change */ + for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) { + if (dw->def_nr < defbase_tot && defbase_sel[dw->def_nr]) { + if (dw->weight) { + dw->weight = dw->weight * change; + CLAMP(dw->weight, 0.0f, 1.0f); + } + } + } +} + +/** + * Variables stored both for 'active' and 'mirror' sides. + */ +struct WeightPaintGroupData { + /** index of active group or its mirror + * + * - 'active' is always `ob->actdef`. + * - 'mirror' is -1 when 'ME_EDIT_MIRROR_X' flag id disabled, + * otherwise this will be set to the mirror or the active group (if the group isn't mirrored). + */ + int index; + /** lock that includes the 'index' as locked too + * + * - 'active' is set of locked or active/selected groups + * - 'mirror' is set of locked or mirror groups + */ + const bool *lock; +}; + +/* struct to avoid passing many args each call to do_weight_paint_vertex() + * this _could_ be made a part of the operators 'WPaintData' struct, or at + * least a member, but for now keep its own struct, initialized on every + * paint stroke update - campbell */ +typedef struct WeightPaintInfo { + + int defbase_tot; + + /* both must add up to 'defbase_tot' */ + int defbase_tot_sel; + int defbase_tot_unsel; + + struct WeightPaintGroupData active, mirror; + + /* boolean array for locked bones, + * length of defbase_tot */ + const bool *lock_flags; + /* boolean array for selected bones, + * length of defbase_tot, can't be const because of how it's passed */ + const bool *defbase_sel; + /* same as WeightPaintData.vgroup_validmap, + * only added here for convenience */ + const bool *vgroup_validmap; + /* same as WeightPaintData.vgroup_locked/unlocked, + * only added here for convenience */ + const bool *vgroup_locked; + const bool *vgroup_unlocked; + + bool do_flip; + bool do_multipaint; + bool do_auto_normalize; + bool do_lock_relative; + bool is_normalized; + + float brush_alpha_value; /* result of BKE_brush_alpha_get() */ +} WeightPaintInfo; + +static void do_weight_paint_vertex_single( + /* vars which remain the same for every vert */ + const VPaint *wp, + Object *ob, + const WeightPaintInfo *wpi, + /* vars which change on each stroke */ + const uint index, + float alpha, + float paintweight) +{ + Mesh *me = (Mesh *)ob->data; + MDeformVert *dv = &me->dvert[index]; + bool topology = (me->editflag & ME_EDIT_MIRROR_TOPO) != 0; + + MDeformWeight *dw; + float weight_prev, weight_cur; + float dw_rel_locked = 0.0f, dw_rel_free = 1.0f; + + /* mirror vars */ + int index_mirr; + int vgroup_mirr; + + MDeformVert *dv_mirr; + MDeformWeight *dw_mirr; + + /* Check if we should mirror vertex groups (X-axis). */ + if (ME_USING_MIRROR_X_VERTEX_GROUPS(me)) { + index_mirr = mesh_get_x_mirror_vert(ob, NULL, index, topology); + vgroup_mirr = wpi->mirror.index; + + /* another possible error - mirror group _and_ active group are the same (which is fine), + * but we also are painting onto a center vertex - this would paint the same weight twice */ + if (index_mirr == index && vgroup_mirr == wpi->active.index) { + index_mirr = vgroup_mirr = -1; + } + } + else { + index_mirr = vgroup_mirr = -1; + } + + /* Check if painting should create new deform weight entries. */ + bool restrict_to_existing = (wp->flag & VP_FLAG_VGROUP_RESTRICT) != 0; + + if (wpi->do_lock_relative || wpi->do_auto_normalize) { + /* Without do_lock_relative only dw_rel_locked is reliable, while dw_rel_free may be fake 0. */ + dw_rel_free = BKE_defvert_total_selected_weight(dv, wpi->defbase_tot, wpi->vgroup_unlocked); + dw_rel_locked = BKE_defvert_total_selected_weight(dv, wpi->defbase_tot, wpi->vgroup_locked); + CLAMP(dw_rel_locked, 0.0f, 1.0f); + + /* Do not create entries if there is not enough free weight to paint. + * This logic is the same as in wpaint_undo_lock_relative and auto-normalize. */ + if (wpi->do_auto_normalize || dw_rel_free <= 0.0f) { + if (dw_rel_locked >= 1.0f - VERTEX_WEIGHT_LOCK_EPSILON) { + restrict_to_existing = true; + } + } + } + + if (restrict_to_existing) { + dw = BKE_defvert_find_index(dv, wpi->active.index); + } + else { + dw = BKE_defvert_ensure_index(dv, wpi->active.index); + } + + if (dw == NULL) { + return; + } + + /* get the mirror def vars */ + if (index_mirr != -1) { + dv_mirr = &me->dvert[index_mirr]; + if (wp->flag & VP_FLAG_VGROUP_RESTRICT) { + dw_mirr = BKE_defvert_find_index(dv_mirr, vgroup_mirr); + + if (dw_mirr == NULL) { + index_mirr = vgroup_mirr = -1; + dv_mirr = NULL; + } + } + else { + if (index != index_mirr) { + dw_mirr = BKE_defvert_ensure_index(dv_mirr, vgroup_mirr); + } + else { + /* dv and dv_mirr are the same */ + int totweight_prev = dv_mirr->totweight; + int dw_offset = (int)(dw - dv_mirr->dw); + dw_mirr = BKE_defvert_ensure_index(dv_mirr, vgroup_mirr); + + /* if we added another, get our old one back */ + if (totweight_prev != dv_mirr->totweight) { + dw = &dv_mirr->dw[dw_offset]; + } + } + } + } + else { + dv_mirr = NULL; + dw_mirr = NULL; + } + + weight_cur = dw->weight; + + /* Handle weight caught up in locked defgroups for Lock Relative. */ + if (wpi->do_lock_relative) { + weight_cur = BKE_defvert_calc_lock_relative_weight(weight_cur, dw_rel_locked, dw_rel_free); + } + + if (!brush_use_accumulate(wp)) { + MDeformVert *dvert_prev = ob->sculpt->mode.wpaint.dvert_prev; + MDeformVert *dv_prev = defweight_prev_init(dvert_prev, me->dvert, index); + if (index_mirr != -1) { + defweight_prev_init(dvert_prev, me->dvert, index_mirr); + } + + weight_prev = BKE_defvert_find_weight(dv_prev, wpi->active.index); + + if (wpi->do_lock_relative) { + weight_prev = BKE_defvert_lock_relative_weight( + weight_prev, dv_prev, wpi->defbase_tot, wpi->vgroup_locked, wpi->vgroup_unlocked); + } + } + else { + weight_prev = weight_cur; + } + + /* If there are no normalize-locks or multipaint, + * then there is no need to run the more complicated checks */ + + { + float new_weight = wpaint_blend( + wp, weight_prev, alpha, paintweight, wpi->brush_alpha_value, wpi->do_flip); + + float weight = wpaint_clamp_monotonic(weight_prev, weight_cur, new_weight); + + /* Undo the lock relative weight correction. */ + if (wpi->do_lock_relative) { + if (index_mirr == index) { + /* When painting a center vertex with X Mirror and L/R pair, + * handle both groups together. This avoids weird fighting + * in the non-normalized weight mode. */ + float orig_weight = dw->weight + dw_mirr->weight; + weight = 0.5f * + wpaint_undo_lock_relative( + weight * 2, orig_weight, dw_rel_locked, dw_rel_free, wpi->do_auto_normalize); + } + else { + weight = wpaint_undo_lock_relative( + weight, dw->weight, dw_rel_locked, dw_rel_free, wpi->do_auto_normalize); + } + + CLAMP(weight, 0.0f, 1.0f); + } + + dw->weight = weight; + + /* WATCH IT: take care of the ordering of applying mirror -> normalize, + * can give wrong results T26193, least confusing if normalize is done last */ + + /* apply mirror */ + if (index_mirr != -1) { + /* copy, not paint again */ + dw_mirr->weight = dw->weight; + } + + /* apply normalize */ + if (wpi->do_auto_normalize) { + /* note on normalize - this used to be applied after painting and normalize all weights, + * in some ways this is good because there is feedback where the more weights involved would + * 'resist' so you couldn't instantly zero out other weights by painting 1.0 on the active. + * + * However this gave a problem since applying mirror, then normalize both verts + * the resulting weight won't match on both sides. + * + * If this 'resisting', slower normalize is nicer, we could call + * do_weight_paint_normalize_all() and only use... + * do_weight_paint_normalize_all_active() when normalizing the mirror vertex. + * - campbell + */ + do_weight_paint_normalize_all_locked_try_active( + dv, wpi->defbase_tot, wpi->vgroup_validmap, wpi->lock_flags, wpi->active.lock); + + if (index_mirr != -1) { + /* only normalize if this is not a center vertex, + * else we get a conflict, normalizing twice */ + if (index != index_mirr) { + do_weight_paint_normalize_all_locked_try_active( + dv_mirr, wpi->defbase_tot, wpi->vgroup_validmap, wpi->lock_flags, wpi->mirror.lock); + } + else { + /* This case accounts for: + * - Painting onto a center vertex of a mesh. + * - X-mirror is enabled. + * - Auto normalize is enabled. + * - The group you are painting onto has a L / R version. + * + * We want L/R vgroups to have the same weight but this can't be if both are over 0.5, + * We _could_ have special check for that, but this would need its own + * normalize function which holds 2 groups from changing at once. + * + * So! just balance out the 2 weights, it keeps them equal and everything normalized. + * + * While it won't hit the desired weight immediately as the user waggles their mouse, + * constant painting and re-normalizing will get there. this is also just simpler logic. + * - campbell */ + dw_mirr->weight = dw->weight = (dw_mirr->weight + dw->weight) * 0.5f; + } + } + } + } +} + +static void do_weight_paint_vertex_multi( + /* vars which remain the same for every vert */ + const VPaint *wp, + Object *ob, + const WeightPaintInfo *wpi, + /* vars which change on each stroke */ + const uint index, + float alpha, + float paintweight) +{ + Mesh *me = (Mesh *)ob->data; + MDeformVert *dv = &me->dvert[index]; + bool topology = (me->editflag & ME_EDIT_MIRROR_TOPO) != 0; + + /* mirror vars */ + int index_mirr = -1; + MDeformVert *dv_mirr = NULL; + + /* weights */ + float curw, curw_real, oldw, neww, change, curw_mirr, change_mirr; + float dw_rel_free, dw_rel_locked; + + /* Check if we should mirror vertex groups (X-axis). */ + if (ME_USING_MIRROR_X_VERTEX_GROUPS(me)) { + index_mirr = mesh_get_x_mirror_vert(ob, NULL, index, topology); + + if (!ELEM(index_mirr, -1, index)) { + dv_mirr = &me->dvert[index_mirr]; + } + else { + index_mirr = -1; + } + } + + /* compute weight change by applying the brush to average or sum of group weights */ + curw = curw_real = BKE_defvert_multipaint_collective_weight( + dv, wpi->defbase_tot, wpi->defbase_sel, wpi->defbase_tot_sel, wpi->is_normalized); + + if (curw == 0.0f) { + /* NOTE: no weight to assign to this vertex, could add all groups? */ + return; + } + + /* Handle weight caught up in locked defgroups for Lock Relative. */ + if (wpi->do_lock_relative) { + dw_rel_free = BKE_defvert_total_selected_weight(dv, wpi->defbase_tot, wpi->vgroup_unlocked); + dw_rel_locked = BKE_defvert_total_selected_weight(dv, wpi->defbase_tot, wpi->vgroup_locked); + CLAMP(dw_rel_locked, 0.0f, 1.0f); + + curw = BKE_defvert_calc_lock_relative_weight(curw, dw_rel_locked, dw_rel_free); + } + + if (!brush_use_accumulate(wp)) { + MDeformVert *dvert_prev = ob->sculpt->mode.wpaint.dvert_prev; + MDeformVert *dv_prev = defweight_prev_init(dvert_prev, me->dvert, index); + if (index_mirr != -1) { + defweight_prev_init(dvert_prev, me->dvert, index_mirr); + } + + oldw = BKE_defvert_multipaint_collective_weight( + dv_prev, wpi->defbase_tot, wpi->defbase_sel, wpi->defbase_tot_sel, wpi->is_normalized); + + if (wpi->do_lock_relative) { + oldw = BKE_defvert_lock_relative_weight( + oldw, dv_prev, wpi->defbase_tot, wpi->vgroup_locked, wpi->vgroup_unlocked); + } + } + else { + oldw = curw; + } + + neww = wpaint_blend(wp, oldw, alpha, paintweight, wpi->brush_alpha_value, wpi->do_flip); + neww = wpaint_clamp_monotonic(oldw, curw, neww); + + if (wpi->do_lock_relative) { + neww = wpaint_undo_lock_relative( + neww, curw_real, dw_rel_locked, dw_rel_free, wpi->do_auto_normalize); + } + + change = neww / curw_real; + + /* verify for all groups that 0 < result <= 1 */ + multipaint_clamp_change(dv, wpi->defbase_tot, wpi->defbase_sel, &change); + + if (dv_mirr != NULL) { + curw_mirr = BKE_defvert_multipaint_collective_weight( + dv_mirr, wpi->defbase_tot, wpi->defbase_sel, wpi->defbase_tot_sel, wpi->is_normalized); + + if (curw_mirr == 0.0f) { + /* can't mirror into a zero weight vertex */ + dv_mirr = NULL; + } + else { + /* mirror is changed to achieve the same collective weight value */ + float orig = change_mirr = curw_real * change / curw_mirr; + + multipaint_clamp_change(dv_mirr, wpi->defbase_tot, wpi->defbase_sel, &change_mirr); + + if (!multipaint_verify_change(dv_mirr, wpi->defbase_tot, change_mirr, wpi->defbase_sel)) { + return; + } + + change *= change_mirr / orig; + } + } + + if (!multipaint_verify_change(dv, wpi->defbase_tot, change, wpi->defbase_sel)) { + return; + } + + /* apply validated change to vertex and mirror */ + multipaint_apply_change(dv, wpi->defbase_tot, change, wpi->defbase_sel); + + if (dv_mirr != NULL) { + multipaint_apply_change(dv_mirr, wpi->defbase_tot, change_mirr, wpi->defbase_sel); + } + + /* normalize */ + if (wpi->do_auto_normalize) { + do_weight_paint_normalize_all_locked_try_active( + dv, wpi->defbase_tot, wpi->vgroup_validmap, wpi->lock_flags, wpi->active.lock); + + if (dv_mirr != NULL) { + do_weight_paint_normalize_all_locked_try_active( + dv_mirr, wpi->defbase_tot, wpi->vgroup_validmap, wpi->lock_flags, wpi->active.lock); + } + } +} + +static void do_weight_paint_vertex( + /* vars which remain the same for every vert */ + const VPaint *wp, + Object *ob, + const WeightPaintInfo *wpi, + /* vars which change on each stroke */ + const uint index, + float alpha, + float paintweight) +{ + if (wpi->do_multipaint) { + do_weight_paint_vertex_multi(wp, ob, wpi, index, alpha, paintweight); + } + else { + do_weight_paint_vertex_single(wp, ob, wpi, index, alpha, paintweight); + } +} + +/* Toggle operator for turning vertex paint mode on or off (copied from sculpt.c) */ +static void vertex_paint_init_session(Depsgraph *depsgraph, + Scene *scene, + Object *ob, + eObjectMode object_mode) +{ + /* Create persistent sculpt mode data */ + BKE_sculpt_toolsettings_data_ensure(scene); + + BLI_assert(ob->sculpt == NULL); + ob->sculpt = (SculptSession *)MEM_callocN(sizeof(SculptSession), "sculpt session"); + ob->sculpt->mode_type = object_mode; + BKE_sculpt_update_object_for_edit(depsgraph, ob, true, false, false); +} + +static void vertex_paint_init_stroke(Scene *scene, Depsgraph *depsgraph, Object *ob) +{ + BKE_sculpt_update_object_for_edit(depsgraph, ob, true, false, false); + ToolSettings *ts = scene->toolsettings; + SculptSession *ss = ob->sculpt; + + /* Ensure ss->cache is allocated. It will mostly be initialized in + * vwpaint_update_cache_invariants and vwpaint_update_cache_variants. + */ + if (!ss->cache) { + ss->cache = (StrokeCache *)MEM_callocN(sizeof(StrokeCache), "stroke cache"); + } + + /* Allocate scratch array for previous colors if needed. */ + if (!brush_use_accumulate(ts->vpaint)) { + if (!ob->sculpt->cache->prev_colors_vpaint) { + Mesh *me = BKE_object_get_original_mesh(ob); + size_t elem_size; + int elem_num; + + elem_num = get_vcol_elements(me, &elem_size); + + ob->sculpt->cache->prev_colors_vpaint = (uint *)MEM_callocN(elem_num * elem_size, __func__); + } + } + else { + MEM_SAFE_FREE(ob->sculpt->cache->prev_colors_vpaint); + } +} + +static void vertex_paint_init_session_data(const ToolSettings *ts, Object *ob) +{ + /* Create maps */ + struct SculptVertexPaintGeomMap *gmap = NULL; + if (ob->mode == OB_MODE_VERTEX_PAINT) { + gmap = &ob->sculpt->mode.vpaint.gmap; + BLI_assert(ob->sculpt->mode_type == OB_MODE_VERTEX_PAINT); + } + else if (ob->mode == OB_MODE_WEIGHT_PAINT) { + gmap = &ob->sculpt->mode.wpaint.gmap; + BLI_assert(ob->sculpt->mode_type == OB_MODE_WEIGHT_PAINT); + } + else { + ob->sculpt->mode_type = (eObjectMode)0; + BLI_assert(0); + return; + } + + Mesh *me = (Mesh *)ob->data; + + if (gmap->vert_to_loop == NULL) { + gmap->vert_map_mem = NULL; + gmap->vert_to_loop = NULL; + gmap->poly_map_mem = NULL; + gmap->vert_to_poly = NULL; + BKE_mesh_vert_loop_map_create(&gmap->vert_to_loop, + &gmap->vert_map_mem, + me->mpoly, + me->mloop, + me->totvert, + me->totpoly, + me->totloop); + BKE_mesh_vert_poly_map_create(&gmap->vert_to_poly, + &gmap->poly_map_mem, + me->mpoly, + me->mloop, + me->totvert, + me->totpoly, + me->totloop); + } + + /* Create average brush arrays */ + if (ob->mode == OB_MODE_WEIGHT_PAINT) { + if (!brush_use_accumulate(ts->wpaint)) { + if (ob->sculpt->mode.wpaint.alpha_weight == NULL) { + ob->sculpt->mode.wpaint.alpha_weight = (float *)MEM_callocN(me->totvert * sizeof(float), + __func__); + } + if (ob->sculpt->mode.wpaint.dvert_prev == NULL) { + ob->sculpt->mode.wpaint.dvert_prev = (MDeformVert *)MEM_callocN( + me->totvert * sizeof(MDeformVert), __func__); + MDeformVert *dv = ob->sculpt->mode.wpaint.dvert_prev; + for (int i = 0; i < me->totvert; i++, dv++) { + /* Use to show this isn't initialized, never apply to the mesh data. */ + dv->flag = 1; + } + } + } + else { + MEM_SAFE_FREE(ob->sculpt->mode.wpaint.alpha_weight); + if (ob->sculpt->mode.wpaint.dvert_prev != NULL) { + BKE_defvert_array_free_elems(ob->sculpt->mode.wpaint.dvert_prev, me->totvert); + MEM_freeN(ob->sculpt->mode.wpaint.dvert_prev); + ob->sculpt->mode.wpaint.dvert_prev = NULL; + } + } + } +} + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Enter Vertex/Weight Paint Mode + * \{ */ + +static void ed_vwpaintmode_enter_generic( + Main *bmain, Depsgraph *depsgraph, Scene *scene, Object *ob, const eObjectMode mode_flag) +{ + ob->mode |= mode_flag; + Mesh *me = BKE_mesh_from_object(ob); + + /* Same as sculpt mode, make sure we don't have cached derived mesh which + * points to freed arrays. + */ + BKE_object_free_derived_caches(ob); + + if (mode_flag == OB_MODE_VERTEX_PAINT) { + const ePaintMode paint_mode = PAINT_MODE_VERTEX; + ED_mesh_color_ensure(me, NULL); + + BKE_paint_ensure(scene->toolsettings, (Paint **)&scene->toolsettings->vpaint); + Paint *paint = BKE_paint_get_active_from_paintmode(scene, paint_mode); + paint_cursor_start(paint, vertex_paint_poll); + BKE_paint_init(bmain, scene, paint_mode, PAINT_CURSOR_VERTEX_PAINT); + } + else if (mode_flag == OB_MODE_WEIGHT_PAINT) { + const ePaintMode paint_mode = PAINT_MODE_WEIGHT; + + BKE_paint_ensure(scene->toolsettings, (Paint **)&scene->toolsettings->wpaint); + Paint *paint = BKE_paint_get_active_from_paintmode(scene, paint_mode); + paint_cursor_start(paint, weight_paint_poll); + BKE_paint_init(bmain, scene, paint_mode, PAINT_CURSOR_WEIGHT_PAINT); + + /* weight paint specific */ + ED_mesh_mirror_spatial_table_end(ob); + ED_vgroup_sync_from_pose(ob); + } + else { + BLI_assert(0); + } + + /* Create vertex/weight paint mode session data */ + if (ob->sculpt) { + if (ob->sculpt->cache) { + SCULPT_cache_free(ob->sculpt->cache); + ob->sculpt->cache = NULL; + } + BKE_sculptsession_free(ob); + } + + vertex_paint_init_session(depsgraph, scene, ob, mode_flag); + + /* Flush object mode. */ + DEG_id_tag_update(&ob->id, ID_RECALC_COPY_ON_WRITE); +} + +void ED_object_vpaintmode_enter_ex(Main *bmain, Depsgraph *depsgraph, Scene *scene, Object *ob) +{ + ed_vwpaintmode_enter_generic(bmain, depsgraph, scene, ob, OB_MODE_VERTEX_PAINT); +} +void ED_object_vpaintmode_enter(struct bContext *C, Depsgraph *depsgraph) +{ + Main *bmain = CTX_data_main(C); + Scene *scene = CTX_data_scene(C); + Object *ob = CTX_data_active_object(C); + ED_object_vpaintmode_enter_ex(bmain, depsgraph, scene, ob); +} + +void ED_object_wpaintmode_enter_ex(Main *bmain, Depsgraph *depsgraph, Scene *scene, Object *ob) +{ + ed_vwpaintmode_enter_generic(bmain, depsgraph, scene, ob, OB_MODE_WEIGHT_PAINT); +} +void ED_object_wpaintmode_enter(struct bContext *C, Depsgraph *depsgraph) +{ + Main *bmain = CTX_data_main(C); + Scene *scene = CTX_data_scene(C); + Object *ob = CTX_data_active_object(C); + ED_object_wpaintmode_enter_ex(bmain, depsgraph, scene, ob); +} + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Exit Vertex/Weight Paint Mode + * \{ */ + +static void ed_vwpaintmode_exit_generic(Object *ob, const eObjectMode mode_flag) +{ + Mesh *me = BKE_mesh_from_object(ob); + ob->mode &= ~mode_flag; + + if (mode_flag == OB_MODE_VERTEX_PAINT) { + if (me->editflag & ME_EDIT_PAINT_FACE_SEL) { + BKE_mesh_flush_select_from_polys(me); + } + else if (me->editflag & ME_EDIT_PAINT_VERT_SEL) { + BKE_mesh_flush_select_from_verts(me); + } + } + else if (mode_flag == OB_MODE_WEIGHT_PAINT) { + if (me->editflag & ME_EDIT_PAINT_VERT_SEL) { + BKE_mesh_flush_select_from_verts(me); + } + else if (me->editflag & ME_EDIT_PAINT_FACE_SEL) { + BKE_mesh_flush_select_from_polys(me); + } + } + else { + BLI_assert(0); + } + + /* If the cache is not released by a cancel or a done, free it now. */ + if (ob->sculpt && ob->sculpt->cache) { + SCULPT_cache_free(ob->sculpt->cache); + ob->sculpt->cache = NULL; + } + + BKE_sculptsession_free(ob); + + paint_cursor_delete_textures(); + + if (mode_flag == OB_MODE_WEIGHT_PAINT) { + ED_mesh_mirror_spatial_table_end(ob); + ED_mesh_mirror_topo_table_end(ob); + } + + /* Never leave derived meshes behind. */ + BKE_object_free_derived_caches(ob); + + /* Flush object mode. */ + DEG_id_tag_update(&ob->id, ID_RECALC_COPY_ON_WRITE); +} + +void ED_object_vpaintmode_exit_ex(Object *ob) +{ + ed_vwpaintmode_exit_generic(ob, OB_MODE_VERTEX_PAINT); +} +void ED_object_vpaintmode_exit(struct bContext *C) +{ + Object *ob = CTX_data_active_object(C); + ED_object_vpaintmode_exit_ex(ob); +} + +void ED_object_wpaintmode_exit_ex(Object *ob) +{ + ed_vwpaintmode_exit_generic(ob, OB_MODE_WEIGHT_PAINT); +} +void ED_object_wpaintmode_exit(struct bContext *C) +{ + Object *ob = CTX_data_active_object(C); + ED_object_wpaintmode_exit_ex(ob); +} + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Toggle Weight Paint Operator + * \{ */ + +/** + * \note Keep in sync with #vpaint_mode_toggle_exec + */ +static int wpaint_mode_toggle_exec(bContext *C, wmOperator *op) +{ + Main *bmain = CTX_data_main(C); + struct wmMsgBus *mbus = CTX_wm_message_bus(C); + Object *ob = CTX_data_active_object(C); + const int mode_flag = OB_MODE_WEIGHT_PAINT; + const bool is_mode_set = (ob->mode & mode_flag) != 0; + Scene *scene = CTX_data_scene(C); + ToolSettings *ts = scene->toolsettings; + + if (!is_mode_set) { + if (!ED_object_mode_compat_set(C, ob, (eObjectMode)mode_flag, op->reports)) { + return OPERATOR_CANCELLED; + } + } + + Mesh *me = BKE_mesh_from_object(ob); + + if (is_mode_set) { + ED_object_wpaintmode_exit_ex(ob); + } + else { + Depsgraph *depsgraph = CTX_data_depsgraph_on_load(C); + if (depsgraph) { + depsgraph = CTX_data_ensure_evaluated_depsgraph(C); + } + ED_object_wpaintmode_enter_ex(bmain, depsgraph, scene, ob); + BKE_paint_toolslots_brush_validate(bmain, &ts->wpaint->paint); + } + + /* Prepare armature posemode. */ + ED_object_posemode_set_for_weight_paint(C, bmain, ob, is_mode_set); + + /* Weight-paint works by overriding colors in mesh, + * so need to make sure we recalculate on enter and + * exit (exit needs doing regardless because we + * should re-deform). + */ + DEG_id_tag_update(&me->id, 0); + + WM_event_add_notifier(C, NC_SCENE | ND_MODE, scene); + + WM_msg_publish_rna_prop(mbus, &ob->id, ob, Object, mode); + + WM_toolsystem_update_from_context_view3d(C); + + return OPERATOR_FINISHED; +} + +static bool paint_mode_toggle_poll_test(bContext *C) +{ + Object *ob = CTX_data_active_object(C); + if (ob == NULL || ob->type != OB_MESH) { + return false; + } + if (!ob->data || ID_IS_LINKED(ob->data)) { + return false; + } + return true; +} + +void PAINT_OT_weight_paint_toggle(wmOperatorType *ot) +{ + + /* identifiers */ + ot->name = "Weight Paint Mode"; + ot->idname = "PAINT_OT_weight_paint_toggle"; + ot->description = "Toggle weight paint mode in 3D view"; + + /* api callbacks */ + ot->exec = wpaint_mode_toggle_exec; + ot->poll = paint_mode_toggle_poll_test; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; +} + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Weight Paint Operator + * \{ */ + +struct WPaintData { + ViewContext vc; + struct NormalAnglePrecalc normal_angle_precalc; + + struct WeightPaintGroupData active, mirror; + + /* variables for auto normalize */ + const bool *vgroup_validmap; /* stores if vgroups tie to deforming bones or not */ + const bool *lock_flags; + const bool *vgroup_locked; /* mask of locked defbones */ + const bool *vgroup_unlocked; /* mask of unlocked defbones */ + + /* variables for multipaint */ + const bool *defbase_sel; /* set of selected groups */ + int defbase_tot_sel; /* number of selected groups */ + bool do_multipaint; /* true if multipaint enabled and multiple groups selected */ + bool do_lock_relative; + + int defbase_tot; + + /* original weight values for use in blur/smear */ + float *precomputed_weight; + bool precomputed_weight_ready; +}; + +static void smooth_brush_toggle_on(const bContext *C, Paint *paint, StrokeCache *cache) +{ + Scene *scene = CTX_data_scene(C); + Brush *brush = paint->brush; + int cur_brush_size = BKE_brush_size_get(scene, brush); + + BLI_strncpy( + cache->saved_active_brush_name, brush->id.name + 2, sizeof(cache->saved_active_brush_name)); + + /* Switch to the blur (smooth) brush. */ + brush = BKE_paint_toolslots_brush_get(paint, WPAINT_TOOL_BLUR); + if (brush) { + BKE_paint_brush_set(paint, brush); + cache->saved_smooth_size = BKE_brush_size_get(scene, brush); + BKE_brush_size_set(scene, brush, cur_brush_size); + BKE_curvemapping_init(brush->curve); + } +} + +static void smooth_brush_toggle_off(const bContext *C, Paint *paint, StrokeCache *cache) +{ + Main *bmain = CTX_data_main(C); + Scene *scene = CTX_data_scene(C); + Brush *brush = BKE_paint_brush(paint); + /* The current brush should match with what we have stored in the cache. */ + BLI_assert(brush == cache->brush); + + /* Try to switch back to the saved/previous brush. */ + BKE_brush_size_set(scene, brush, cache->saved_smooth_size); + brush = (Brush *)BKE_libblock_find_name(bmain, ID_BR, cache->saved_active_brush_name); + if (brush) { + BKE_paint_brush_set(paint, brush); + } +} + +/* Initialize the stroke cache invariants from operator properties */ +static void vwpaint_update_cache_invariants( + bContext *C, VPaint *vp, SculptSession *ss, wmOperator *op, const float mouse[2]) +{ + StrokeCache *cache; + Scene *scene = CTX_data_scene(C); + UnifiedPaintSettings *ups = &CTX_data_tool_settings(C)->unified_paint_settings; + ViewContext *vc = paint_stroke_view_context((PaintStroke *)op->customdata); + Object *ob = CTX_data_active_object(C); + float mat[3][3]; + float view_dir[3] = {0.0f, 0.0f, 1.0f}; + int mode; + + /* VW paint needs to allocate stroke cache before update is called. */ + if (!ss->cache) { + cache = (StrokeCache *)MEM_callocN(sizeof(StrokeCache), "stroke cache"); + ss->cache = cache; + } + else { + cache = ss->cache; + } + + /* Initial mouse location */ + if (mouse) { + copy_v2_v2(cache->initial_mouse, mouse); + } + else { + zero_v2(cache->initial_mouse); + } + + mode = RNA_enum_get(op->ptr, "mode"); + cache->invert = mode == BRUSH_STROKE_INVERT; + cache->alt_smooth = mode == BRUSH_STROKE_SMOOTH; + /* not very nice, but with current events system implementation + * we can't handle brush appearance inversion hotkey separately (sergey) */ + if (cache->invert) { + ups->draw_inverted = true; + } + else { + ups->draw_inverted = false; + } + + if (cache->alt_smooth) { + smooth_brush_toggle_on(C, &vp->paint, cache); + } + + copy_v2_v2(cache->mouse, cache->initial_mouse); + Brush *brush = vp->paint.brush; + /* Truly temporary data that isn't stored in properties */ + cache->vc = vc; + cache->brush = brush; + cache->first_time = 1; + + /* cache projection matrix */ + ED_view3d_ob_project_mat_get(cache->vc->rv3d, ob, cache->projection_mat); + + invert_m4_m4(ob->imat, ob->obmat); + copy_m3_m4(mat, cache->vc->rv3d->viewinv); + mul_m3_v3(mat, view_dir); + copy_m3_m4(mat, ob->imat); + mul_m3_v3(mat, view_dir); + normalize_v3_v3(cache->true_view_normal, view_dir); + + copy_v3_v3(cache->view_normal, cache->true_view_normal); + cache->bstrength = BKE_brush_alpha_get(scene, brush); + cache->is_last_valid = false; +} + +/* Initialize the stroke cache variants from operator properties */ +static void vwpaint_update_cache_variants(bContext *C, VPaint *vp, Object *ob, PointerRNA *ptr) +{ + Scene *scene = CTX_data_scene(C); + SculptSession *ss = ob->sculpt; + StrokeCache *cache = ss->cache; + Brush *brush = BKE_paint_brush(&vp->paint); + + /* This effects the actual brush radius, so things farther away + * are compared with a larger radius and vice versa. */ + if (cache->first_time) { + RNA_float_get_array(ptr, "location", cache->true_location); + } + + RNA_float_get_array(ptr, "mouse", cache->mouse); + + /* XXX: Use pressure value from first brush step for brushes which don't + * support strokes (grab, thumb). They depends on initial state and + * brush coord/pressure/etc. + * It's more an events design issue, which doesn't split coordinate/pressure/angle + * changing events. We should avoid this after events system re-design */ + if (paint_supports_dynamic_size(brush, PAINT_MODE_SCULPT) || cache->first_time) { + cache->pressure = RNA_float_get(ptr, "pressure"); + } + + /* Truly temporary data that isn't stored in properties */ + if (cache->first_time) { + cache->initial_radius = paint_calc_object_space_radius( + cache->vc, cache->true_location, BKE_brush_size_get(scene, brush)); + BKE_brush_unprojected_radius_set(scene, brush, cache->initial_radius); + } + + if (BKE_brush_use_size_pressure(brush) && + paint_supports_dynamic_size(brush, PAINT_MODE_SCULPT)) { + cache->radius = cache->initial_radius * cache->pressure; + } + else { + cache->radius = cache->initial_radius; + } + + cache->radius_squared = cache->radius * cache->radius; + + if (ss->pbvh) { + BKE_pbvh_update_bounds(ss->pbvh, PBVH_UpdateRedraw | PBVH_UpdateBB); + } +} + +static bool wpaint_stroke_test_start(bContext *C, wmOperator *op, const float mouse[2]) +{ + Scene *scene = CTX_data_scene(C); + struct PaintStroke *stroke = (PaintStroke *)op->customdata; + ToolSettings *ts = scene->toolsettings; + Object *ob = CTX_data_active_object(C); + Mesh *me = BKE_mesh_from_object(ob); + struct WPaintData *wpd; + struct WPaintVGroupIndex vgroup_index; + int defbase_tot, defbase_tot_sel; + bool *defbase_sel; + SculptSession *ss = ob->sculpt; + VPaint *vp = CTX_data_tool_settings(C)->wpaint; + Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C); + + if (ED_wpaint_ensure_data(C, op->reports, WPAINT_ENSURE_MIRROR, &vgroup_index) == false) { + return false; + } + + { + /* check if we are attempting to paint onto a locked vertex group, + * and other options disallow it from doing anything useful */ + bDeformGroup *dg; + dg = (bDeformGroup *)BLI_findlink(&me->vertex_group_names, vgroup_index.active); + if (dg->flag & DG_LOCK_WEIGHT) { + BKE_report(op->reports, RPT_WARNING, "Active group is locked, aborting"); + return false; + } + if (vgroup_index.mirror != -1) { + dg = (bDeformGroup *)BLI_findlink(&me->vertex_group_names, vgroup_index.mirror); + if (dg->flag & DG_LOCK_WEIGHT) { + BKE_report(op->reports, RPT_WARNING, "Mirror group is locked, aborting"); + return false; + } + } + } + + /* check that multipaint groups are unlocked */ + defbase_tot = BLI_listbase_count(&me->vertex_group_names); + defbase_sel = BKE_object_defgroup_selected_get(ob, defbase_tot, &defbase_tot_sel); + + if (ts->multipaint && defbase_tot_sel > 1) { + int i; + bDeformGroup *dg; + + if (ME_USING_MIRROR_X_VERTEX_GROUPS(me)) { + BKE_object_defgroup_mirror_selection( + ob, defbase_tot, defbase_sel, defbase_sel, &defbase_tot_sel); + } + + for (i = 0; i < defbase_tot; i++) { + if (defbase_sel[i]) { + dg = (bDeformGroup *)BLI_findlink(&me->vertex_group_names, i); + if (dg->flag & DG_LOCK_WEIGHT) { + BKE_report(op->reports, RPT_WARNING, "Multipaint group is locked, aborting"); + MEM_freeN(defbase_sel); + return false; + } + } + } + } + + /* ALLOCATIONS! no return after this line */ + /* make mode data storage */ + wpd = (WPaintData *)MEM_callocN(sizeof(struct WPaintData), "WPaintData"); + paint_stroke_set_mode_data(stroke, wpd); + ED_view3d_viewcontext_init(C, &wpd->vc, depsgraph); + view_angle_limits_init(&wpd->normal_angle_precalc, + vp->paint.brush->falloff_angle, + (vp->paint.brush->flag & BRUSH_FRONTFACE_FALLOFF) != 0); + + wpd->active.index = vgroup_index.active; + wpd->mirror.index = vgroup_index.mirror; + + /* multipaint */ + wpd->defbase_tot = defbase_tot; + wpd->defbase_sel = defbase_sel; + wpd->defbase_tot_sel = defbase_tot_sel > 1 ? defbase_tot_sel : 1; + wpd->do_multipaint = (ts->multipaint && defbase_tot_sel > 1); + + /* set up auto-normalize, and generate map for detecting which + * vgroups affect deform bones */ + wpd->lock_flags = BKE_object_defgroup_lock_flags_get(ob, wpd->defbase_tot); + if (ts->auto_normalize || ts->multipaint || wpd->lock_flags || ts->wpaint_lock_relative) { + wpd->vgroup_validmap = BKE_object_defgroup_validmap_get(ob, wpd->defbase_tot); + } + + /* Compute the set of all locked deform groups when Lock Relative is active. */ + if (ts->wpaint_lock_relative && + BKE_object_defgroup_check_lock_relative( + wpd->lock_flags, wpd->vgroup_validmap, wpd->active.index) && + (!wpd->do_multipaint || BKE_object_defgroup_check_lock_relative_multi( + defbase_tot, wpd->lock_flags, defbase_sel, defbase_tot_sel))) { + wpd->do_lock_relative = true; + } + + if (wpd->do_lock_relative || (ts->auto_normalize && wpd->lock_flags && !wpd->do_multipaint)) { + bool *unlocked = (bool *)MEM_dupallocN(wpd->vgroup_validmap); + + if (wpd->lock_flags) { + bool *locked = (bool *)MEM_mallocN(sizeof(bool) * wpd->defbase_tot, __func__); + BKE_object_defgroup_split_locked_validmap( + wpd->defbase_tot, wpd->lock_flags, wpd->vgroup_validmap, locked, unlocked); + wpd->vgroup_locked = locked; + } + + wpd->vgroup_unlocked = unlocked; + } + + if (wpd->do_multipaint && ts->auto_normalize) { + bool *tmpflags; + tmpflags = (bool *)MEM_mallocN(sizeof(bool) * defbase_tot, __func__); + if (wpd->lock_flags) { + BLI_array_binary_or(tmpflags, wpd->defbase_sel, wpd->lock_flags, wpd->defbase_tot); + } + else { + memcpy(tmpflags, wpd->defbase_sel, sizeof(*tmpflags) * wpd->defbase_tot); + } + wpd->active.lock = tmpflags; + } + else if (ts->auto_normalize) { + bool *tmpflags; + + tmpflags = wpd->lock_flags ? (bool *)MEM_dupallocN(wpd->lock_flags) : + (bool *)MEM_callocN(sizeof(bool) * defbase_tot, __func__); + tmpflags[wpd->active.index] = true; + wpd->active.lock = tmpflags; + + tmpflags = wpd->lock_flags ? (bool *)MEM_dupallocN(wpd->lock_flags) : + (bool *)MEM_callocN(sizeof(bool) * defbase_tot, __func__); + tmpflags[(wpd->mirror.index != -1) ? wpd->mirror.index : wpd->active.index] = true; + wpd->mirror.lock = tmpflags; + } + + /* If not previously created, create vertex/weight paint mode session data */ + vertex_paint_init_stroke(scene, depsgraph, ob); + vwpaint_update_cache_invariants(C, vp, ss, op, mouse); + vertex_paint_init_session_data(ts, ob); + + if (ELEM(vp->paint.brush->weightpaint_tool, WPAINT_TOOL_SMEAR, WPAINT_TOOL_BLUR)) { + wpd->precomputed_weight = (float *)MEM_mallocN(sizeof(float) * me->totvert, __func__); + } + + if (ob->sculpt->mode.wpaint.dvert_prev != NULL) { + MDeformVert *dv = ob->sculpt->mode.wpaint.dvert_prev; + for (int i = 0; i < me->totvert; i++, dv++) { + /* Use to show this isn't initialized, never apply to the mesh data. */ + dv->flag = 1; + } + } + + return true; +} + +static void get_brush_alpha_data(const Scene *scene, + const SculptSession *ss, + const Brush *brush, + float *r_brush_size_pressure, + float *r_brush_alpha_value, + float *r_brush_alpha_pressure) +{ + *r_brush_size_pressure = BKE_brush_size_get(scene, brush) * + (BKE_brush_use_size_pressure(brush) ? ss->cache->pressure : 1.0f); + *r_brush_alpha_value = BKE_brush_alpha_get(scene, brush); + *r_brush_alpha_pressure = (BKE_brush_use_alpha_pressure(brush) ? ss->cache->pressure : 1.0f); +} + +static float wpaint_get_active_weight(const MDeformVert *dv, const WeightPaintInfo *wpi) +{ + float weight; + + if (wpi->do_multipaint) { + weight = BKE_defvert_multipaint_collective_weight( + dv, wpi->defbase_tot, wpi->defbase_sel, wpi->defbase_tot_sel, wpi->is_normalized); + } + else { + weight = BKE_defvert_find_weight(dv, wpi->active.index); + } + + if (wpi->do_lock_relative) { + weight = BKE_defvert_lock_relative_weight( + weight, dv, wpi->defbase_tot, wpi->vgroup_locked, wpi->vgroup_unlocked); + } + + CLAMP(weight, 0.0f, 1.0f); + return weight; +} + +static void do_wpaint_precompute_weight_cb_ex(void *__restrict userdata, + const int n, + const TaskParallelTLS *__restrict UNUSED(tls)) +{ + SculptThreadedTaskData *data = (SculptThreadedTaskData *)userdata; + const MDeformVert *dv = &data->me->dvert[n]; + + data->wpd->precomputed_weight[n] = wpaint_get_active_weight(dv, data->wpi); +} + +static void precompute_weight_values( + bContext *C, Object *ob, Brush *brush, struct WPaintData *wpd, WeightPaintInfo *wpi, Mesh *me) +{ + if (wpd->precomputed_weight_ready && !brush_use_accumulate_ex(brush, ob->mode)) { + return; + } + + /* threaded loop over vertices */ + SculptThreadedTaskData data; + data.C = C; + data.ob = ob; + data.wpd = wpd; + data.wpi = wpi; + data.me = me; + + TaskParallelSettings settings; + BLI_parallel_range_settings_defaults(&settings); + BLI_task_parallel_range(0, me->totvert, &data, do_wpaint_precompute_weight_cb_ex, &settings); + + wpd->precomputed_weight_ready = true; +} + +static void do_wpaint_brush_blur_task_cb_ex(void *__restrict userdata, + const int n, + const TaskParallelTLS *__restrict UNUSED(tls)) +{ + SculptThreadedTaskData *data = (SculptThreadedTaskData *)userdata; + SculptSession *ss = data->ob->sculpt; + const PBVHType pbvh_type = BKE_pbvh_type(ss->pbvh); + const bool has_grids = (pbvh_type == PBVH_GRIDS); + const struct SculptVertexPaintGeomMap *gmap = &ss->mode.wpaint.gmap; + + const Brush *brush = data->brush; + const StrokeCache *cache = ss->cache; + Scene *scene = CTX_data_scene(data->C); + + float brush_size_pressure, brush_alpha_value, brush_alpha_pressure; + get_brush_alpha_data( + scene, ss, brush, &brush_size_pressure, &brush_alpha_value, &brush_alpha_pressure); + const bool use_normal = vwpaint_use_normal(data->vp); + const bool use_face_sel = (data->me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0; + const bool use_vert_sel = (data->me->editflag & ME_EDIT_PAINT_VERT_SEL) != 0; + + SculptBrushTest test; + SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape( + ss, &test, data->brush->falloff_shape); + const float *sculpt_normal_frontface = SCULPT_brush_frontface_normal_from_falloff_shape( + ss, data->brush->falloff_shape); + + /* For each vertex */ + PBVHVertexIter vd; + BKE_pbvh_vertex_iter_begin (ss->pbvh, data->nodes[n], vd, PBVH_ITER_UNIQUE) { + /* Test to see if the vertex coordinates are within the spherical brush region. */ + if (sculpt_brush_test_sq_fn(&test, vd.co)) { + /* For grid based pbvh, take the vert whose loop corresponds to the current grid. + * Otherwise, take the current vert. */ + const int v_index = has_grids ? data->me->mloop[vd.grid_indices[vd.g]].v : + vd.vert_indices[vd.i]; + const float grid_alpha = has_grids ? 1.0f / vd.gridsize : 1.0f; + const char v_flag = data->me->mvert[v_index].flag; + /* If the vertex is selected */ + if (!(use_face_sel || use_vert_sel) || v_flag & SELECT) { + /* Get the average poly weight */ + int total_hit_loops = 0; + float weight_final = 0.0f; + for (int j = 0; j < gmap->vert_to_poly[v_index].count; j++) { + const int p_index = gmap->vert_to_poly[v_index].indices[j]; + const MPoly *mp = &data->me->mpoly[p_index]; + + total_hit_loops += mp->totloop; + for (int k = 0; k < mp->totloop; k++) { + const int l_index = mp->loopstart + k; + const MLoop *ml = &data->me->mloop[l_index]; + weight_final += data->wpd->precomputed_weight[ml->v]; + } + } + + /* Apply the weight to the vertex. */ + if (total_hit_loops != 0) { + float brush_strength = cache->bstrength; + const float angle_cos = (use_normal && vd.no) ? + dot_v3v3(sculpt_normal_frontface, vd.no) : + 1.0f; + if (((brush->flag & BRUSH_FRONTFACE) == 0 || (angle_cos > 0.0f)) && + ((brush->flag & BRUSH_FRONTFACE_FALLOFF) == 0 || + view_angle_limits_apply_falloff( + &data->wpd->normal_angle_precalc, angle_cos, &brush_strength))) { + const float brush_fade = BKE_brush_curve_strength( + brush, sqrtf(test.dist), cache->radius); + const float final_alpha = brush_fade * brush_strength * grid_alpha * + brush_alpha_pressure; + + if ((brush->flag & BRUSH_ACCUMULATE) == 0) { + if (ss->mode.wpaint.alpha_weight[v_index] < final_alpha) { + ss->mode.wpaint.alpha_weight[v_index] = final_alpha; + } + else { + continue; + } + } + + weight_final /= total_hit_loops; + /* Only paint visible verts */ + do_weight_paint_vertex( + data->vp, data->ob, data->wpi, v_index, final_alpha, weight_final); + } + } + } + } + } + BKE_pbvh_vertex_iter_end; +} + +static void do_wpaint_brush_smear_task_cb_ex(void *__restrict userdata, + const int n, + const TaskParallelTLS *__restrict UNUSED(tls)) +{ + SculptThreadedTaskData *data = (SculptThreadedTaskData *)userdata; + SculptSession *ss = data->ob->sculpt; + const PBVHType pbvh_type = BKE_pbvh_type(ss->pbvh); + const bool has_grids = (pbvh_type == PBVH_GRIDS); + const struct SculptVertexPaintGeomMap *gmap = &ss->mode.wpaint.gmap; + + const Brush *brush = data->brush; + const Scene *scene = CTX_data_scene(data->C); + const StrokeCache *cache = ss->cache; + float brush_size_pressure, brush_alpha_value, brush_alpha_pressure; + get_brush_alpha_data( + scene, ss, brush, &brush_size_pressure, &brush_alpha_value, &brush_alpha_pressure); + const bool use_normal = vwpaint_use_normal(data->vp); + const bool use_face_sel = (data->me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0; + const bool use_vert_sel = (data->me->editflag & ME_EDIT_PAINT_VERT_SEL) != 0; + float brush_dir[3]; + + sub_v3_v3v3(brush_dir, cache->location, cache->last_location); + project_plane_v3_v3v3(brush_dir, brush_dir, cache->view_normal); + + if (cache->is_last_valid && (normalize_v3(brush_dir) != 0.0f)) { + + SculptBrushTest test; + SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape( + ss, &test, data->brush->falloff_shape); + const float *sculpt_normal_frontface = SCULPT_brush_frontface_normal_from_falloff_shape( + ss, data->brush->falloff_shape); + + /* For each vertex */ + PBVHVertexIter vd; + BKE_pbvh_vertex_iter_begin (ss->pbvh, data->nodes[n], vd, PBVH_ITER_UNIQUE) { + /* Test to see if the vertex coordinates are within the spherical brush region. */ + if (sculpt_brush_test_sq_fn(&test, vd.co)) { + /* For grid based pbvh, take the vert whose loop corresponds to the current grid. + * Otherwise, take the current vert. */ + const int v_index = has_grids ? data->me->mloop[vd.grid_indices[vd.g]].v : + vd.vert_indices[vd.i]; + const float grid_alpha = has_grids ? 1.0f / vd.gridsize : 1.0f; + const MVert *mv_curr = &data->me->mvert[v_index]; + + /* If the vertex is selected */ + if (!(use_face_sel || use_vert_sel) || mv_curr->flag & SELECT) { + float brush_strength = cache->bstrength; + const float angle_cos = (use_normal && vd.no) ? + dot_v3v3(sculpt_normal_frontface, vd.no) : + 1.0f; + if (((brush->flag & BRUSH_FRONTFACE) == 0 || (angle_cos > 0.0f)) && + ((brush->flag & BRUSH_FRONTFACE_FALLOFF) == 0 || + view_angle_limits_apply_falloff( + &data->wpd->normal_angle_precalc, angle_cos, &brush_strength))) { + bool do_color = false; + /* Minimum dot product between brush direction and current + * to neighbor direction is 0.0, meaning orthogonal. */ + float stroke_dot_max = 0.0f; + + /* Get the color of the loop in the opposite direction of the brush movement + * (this callback is specifically for smear.) */ + float weight_final = 0.0; + for (int j = 0; j < gmap->vert_to_poly[v_index].count; j++) { + const int p_index = gmap->vert_to_poly[v_index].indices[j]; + const MPoly *mp = &data->me->mpoly[p_index]; + const MLoop *ml_other = &data->me->mloop[mp->loopstart]; + for (int k = 0; k < mp->totloop; k++, ml_other++) { + const uint v_other_index = ml_other->v; + if (v_other_index != v_index) { + const MVert *mv_other = &data->me->mvert[v_other_index]; + + /* Get the direction from the selected vert to the neighbor. */ + float other_dir[3]; + sub_v3_v3v3(other_dir, mv_curr->co, mv_other->co); + project_plane_v3_v3v3(other_dir, other_dir, cache->view_normal); + + normalize_v3(other_dir); + + const float stroke_dot = dot_v3v3(other_dir, brush_dir); + + if (stroke_dot > stroke_dot_max) { + stroke_dot_max = stroke_dot; + weight_final = data->wpd->precomputed_weight[v_other_index]; + do_color = true; + } + } + } + } + /* Apply weight to vertex */ + if (do_color) { + const float brush_fade = BKE_brush_curve_strength( + brush, sqrtf(test.dist), cache->radius); + const float final_alpha = brush_fade * brush_strength * grid_alpha * + brush_alpha_pressure; + + if (final_alpha <= 0.0f) { + continue; + } + + do_weight_paint_vertex( + data->vp, data->ob, data->wpi, v_index, final_alpha, (float)weight_final); + } + } + } + } + } + BKE_pbvh_vertex_iter_end; + } +} + +static void do_wpaint_brush_draw_task_cb_ex(void *__restrict userdata, + const int n, + const TaskParallelTLS *__restrict UNUSED(tls)) +{ + SculptThreadedTaskData *data = (SculptThreadedTaskData *)userdata; + SculptSession *ss = data->ob->sculpt; + const PBVHType pbvh_type = BKE_pbvh_type(ss->pbvh); + const bool has_grids = (pbvh_type == PBVH_GRIDS); + const Scene *scene = CTX_data_scene(data->C); + + const Brush *brush = data->brush; + const StrokeCache *cache = ss->cache; + /* NOTE: normally `BKE_brush_weight_get(scene, brush)` is used, + * however in this case we calculate a new weight each time. */ + const float paintweight = data->strength; + float brush_size_pressure, brush_alpha_value, brush_alpha_pressure; + get_brush_alpha_data( + scene, ss, brush, &brush_size_pressure, &brush_alpha_value, &brush_alpha_pressure); + const bool use_normal = vwpaint_use_normal(data->vp); + const bool use_face_sel = (data->me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0; + const bool use_vert_sel = (data->me->editflag & ME_EDIT_PAINT_VERT_SEL) != 0; + + SculptBrushTest test; + SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape( + ss, &test, data->brush->falloff_shape); + const float *sculpt_normal_frontface = SCULPT_brush_frontface_normal_from_falloff_shape( + ss, data->brush->falloff_shape); + + /* For each vertex */ + PBVHVertexIter vd; + BKE_pbvh_vertex_iter_begin (ss->pbvh, data->nodes[n], vd, PBVH_ITER_UNIQUE) { + /* Test to see if the vertex coordinates are within the spherical brush region. */ + if (sculpt_brush_test_sq_fn(&test, vd.co)) { + /* NOTE: grids are 1:1 with corners (aka loops). + * For multires, take the vert whose loop corresponds to the current grid. + * Otherwise, take the current vert. */ + const int v_index = has_grids ? data->me->mloop[vd.grid_indices[vd.g]].v : + vd.vert_indices[vd.i]; + const float grid_alpha = has_grids ? 1.0f / vd.gridsize : 1.0f; + + const char v_flag = data->me->mvert[v_index].flag; + /* If the vertex is selected */ + if (!(use_face_sel || use_vert_sel) || v_flag & SELECT) { + float brush_strength = cache->bstrength; + const float angle_cos = (use_normal && vd.no) ? dot_v3v3(sculpt_normal_frontface, vd.no) : + 1.0f; + if (((brush->flag & BRUSH_FRONTFACE) == 0 || (angle_cos > 0.0f)) && + ((brush->flag & BRUSH_FRONTFACE_FALLOFF) == 0 || + view_angle_limits_apply_falloff( + &data->wpd->normal_angle_precalc, angle_cos, &brush_strength))) { + const float brush_fade = BKE_brush_curve_strength( + brush, sqrtf(test.dist), cache->radius); + const float final_alpha = brush_fade * brush_strength * grid_alpha * + brush_alpha_pressure; + + if ((brush->flag & BRUSH_ACCUMULATE) == 0) { + if (ss->mode.wpaint.alpha_weight[v_index] < final_alpha) { + ss->mode.wpaint.alpha_weight[v_index] = final_alpha; + } + else { + continue; + } + } + + do_weight_paint_vertex(data->vp, data->ob, data->wpi, v_index, final_alpha, paintweight); + } + } + } + } + BKE_pbvh_vertex_iter_end; +} + +static void do_wpaint_brush_calc_average_weight_cb_ex( + void *__restrict userdata, const int n, const TaskParallelTLS *__restrict UNUSED(tls)) +{ + SculptThreadedTaskData *data = (SculptThreadedTaskData *)userdata; + SculptSession *ss = data->ob->sculpt; + StrokeCache *cache = ss->cache; + const PBVHType pbvh_type = BKE_pbvh_type(ss->pbvh); + const bool has_grids = (pbvh_type == PBVH_GRIDS); + + const bool use_normal = vwpaint_use_normal(data->vp); + const bool use_face_sel = (data->me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0; + const bool use_vert_sel = (data->me->editflag & ME_EDIT_PAINT_VERT_SEL) != 0; + + struct WPaintAverageAccum *accum = (struct WPaintAverageAccum *)data->custom_data + n; + accum->len = 0; + accum->value = 0.0; + + SculptBrushTest test; + SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape( + ss, &test, data->brush->falloff_shape); + const float *sculpt_normal_frontface = SCULPT_brush_frontface_normal_from_falloff_shape( + ss, data->brush->falloff_shape); + + /* For each vertex */ + PBVHVertexIter vd; + BKE_pbvh_vertex_iter_begin (ss->pbvh, data->nodes[n], vd, PBVH_ITER_UNIQUE) { + /* Test to see if the vertex coordinates are within the spherical brush region. */ + if (sculpt_brush_test_sq_fn(&test, vd.co)) { + const float angle_cos = (use_normal && vd.no) ? dot_v3v3(sculpt_normal_frontface, vd.no) : + 1.0f; + if (angle_cos > 0.0 && + BKE_brush_curve_strength(data->brush, sqrtf(test.dist), cache->radius) > 0.0) { + const int v_index = has_grids ? data->me->mloop[vd.grid_indices[vd.g]].v : + vd.vert_indices[vd.i]; + const char v_flag = data->me->mvert[v_index].flag; + + /* If the vertex is selected. */ + if (!(use_face_sel || use_vert_sel) || v_flag & SELECT) { + const MDeformVert *dv = &data->me->dvert[v_index]; + accum->len += 1; + accum->value += wpaint_get_active_weight(dv, data->wpi); + } + } + } + } + BKE_pbvh_vertex_iter_end; +} + +static void calculate_average_weight(SculptThreadedTaskData *data, + PBVHNode **UNUSED(nodes), + int totnode) +{ + struct WPaintAverageAccum *accum = (WPaintAverageAccum *)MEM_mallocN(sizeof(*accum) * totnode, + __func__); + data->custom_data = accum; + + TaskParallelSettings settings; + BKE_pbvh_parallel_range_settings(&settings, true, totnode); + BLI_task_parallel_range(0, totnode, data, do_wpaint_brush_calc_average_weight_cb_ex, &settings); + + uint accum_len = 0; + double accum_weight = 0.0; + for (int i = 0; i < totnode; i++) { + accum_len += accum[i].len; + accum_weight += accum[i].value; + } + if (accum_len != 0) { + accum_weight /= accum_len; + data->strength = (float)accum_weight; + } + + MEM_SAFE_FREE(data->custom_data); /* 'accum' */ +} + +static void wpaint_paint_leaves(bContext *C, + Object *ob, + Sculpt *sd, + VPaint *vp, + struct WPaintData *wpd, + WeightPaintInfo *wpi, + Mesh *me, + PBVHNode **nodes, + int totnode) +{ + Scene *scene = CTX_data_scene(C); + const Brush *brush = ob->sculpt->cache->brush; + + /* threaded loop over nodes */ + SculptThreadedTaskData data = {0}; + data.C = C; + data.sd = sd; + data.ob = ob; + data.brush = brush; + data.nodes = nodes; + data.vp = vp; + data.wpd = wpd; + data.wpi = wpi; + data.me = me; + + /* Use this so average can modify its weight without touching the brush. */ + data.strength = BKE_brush_weight_get(scene, brush); + + /* NOTE: current mirroring code cannot be run in parallel */ + TaskParallelSettings settings; + const bool use_threading = !ME_USING_MIRROR_X_VERTEX_GROUPS(me); + BKE_pbvh_parallel_range_settings(&settings, use_threading, totnode); + + switch ((eBrushWeightPaintTool)brush->weightpaint_tool) { + case WPAINT_TOOL_AVERAGE: + calculate_average_weight(&data, nodes, totnode); + BLI_task_parallel_range(0, totnode, &data, do_wpaint_brush_draw_task_cb_ex, &settings); + break; + case WPAINT_TOOL_SMEAR: + BLI_task_parallel_range(0, totnode, &data, do_wpaint_brush_smear_task_cb_ex, &settings); + break; + case WPAINT_TOOL_BLUR: + BLI_task_parallel_range(0, totnode, &data, do_wpaint_brush_blur_task_cb_ex, &settings); + break; + case WPAINT_TOOL_DRAW: + BLI_task_parallel_range(0, totnode, &data, do_wpaint_brush_draw_task_cb_ex, &settings); + break; + } +} + +static PBVHNode **vwpaint_pbvh_gather_generic( + Object *ob, VPaint *wp, Sculpt *sd, Brush *brush, int *r_totnode) +{ + SculptSession *ss = ob->sculpt; + const bool use_normal = vwpaint_use_normal(wp); + PBVHNode **nodes = NULL; + + /* Build a list of all nodes that are potentially within the brush's area of influence */ + if (brush->falloff_shape == PAINT_FALLOFF_SHAPE_SPHERE) { + SculptSearchSphereData data = {0}; + data.ss = ss; + data.sd = sd; + data.radius_squared = ss->cache->radius_squared; + data.original = true; + + BKE_pbvh_search_gather(ss->pbvh, SCULPT_search_sphere_cb, &data, &nodes, r_totnode); + if (use_normal) { + SCULPT_pbvh_calc_area_normal( + brush, ob, nodes, *r_totnode, true, ss->cache->sculpt_normal_symm); + } + else { + zero_v3(ss->cache->sculpt_normal_symm); + } + } + else { + struct DistRayAABB_Precalc dist_ray_to_aabb_precalc; + dist_squared_ray_to_aabb_v3_precalc( + &dist_ray_to_aabb_precalc, ss->cache->location, ss->cache->view_normal); + SculptSearchCircleData data = {0}; + data.ss = ss; + data.sd = sd; + data.radius_squared = ss->cache->radius_squared; + data.original = true; + data.dist_ray_to_aabb_precalc = &dist_ray_to_aabb_precalc; + + BKE_pbvh_search_gather(ss->pbvh, SCULPT_search_circle_cb, &data, &nodes, r_totnode); + if (use_normal) { + copy_v3_v3(ss->cache->sculpt_normal_symm, ss->cache->view_normal); + } + else { + zero_v3(ss->cache->sculpt_normal_symm); + } + } + return nodes; +} + +static void wpaint_do_paint(bContext *C, + Object *ob, + VPaint *wp, + Sculpt *sd, + struct WPaintData *wpd, + WeightPaintInfo *wpi, + Mesh *me, + Brush *brush, + const char symm, + const int axis, + const int i, + const float angle) +{ + SculptSession *ss = ob->sculpt; + ss->cache->radial_symmetry_pass = i; + SCULPT_cache_calc_brushdata_symm(ss->cache, symm, axis, angle); + + int totnode; + PBVHNode **nodes = vwpaint_pbvh_gather_generic(ob, wp, sd, brush, &totnode); + + wpaint_paint_leaves(C, ob, sd, wp, wpd, wpi, me, nodes, totnode); + + if (nodes) { + MEM_freeN(nodes); + } +} + +static void wpaint_do_radial_symmetry(bContext *C, + Object *ob, + VPaint *wp, + Sculpt *sd, + struct WPaintData *wpd, + WeightPaintInfo *wpi, + Mesh *me, + Brush *brush, + const char symm, + const int axis) +{ + for (int i = 1; i < wp->radial_symm[axis - 'X']; i++) { + const float angle = (2.0 * M_PI) * i / wp->radial_symm[axis - 'X']; + wpaint_do_paint(C, ob, wp, sd, wpd, wpi, me, brush, symm, axis, i, angle); + } +} + +/* near duplicate of: sculpt.c's, + * 'do_symmetrical_brush_actions' and 'vpaint_do_symmetrical_brush_actions'. */ +static void wpaint_do_symmetrical_brush_actions( + bContext *C, Object *ob, VPaint *wp, Sculpt *sd, struct WPaintData *wpd, WeightPaintInfo *wpi) +{ + Brush *brush = BKE_paint_brush(&wp->paint); + Mesh *me = (Mesh *)ob->data; + SculptSession *ss = ob->sculpt; + StrokeCache *cache = ss->cache; + const char symm = SCULPT_mesh_symmetry_xyz_get(ob); + int i = 0; + + /* initial stroke */ + cache->mirror_symmetry_pass = 0; + wpaint_do_paint(C, ob, wp, sd, wpd, wpi, me, brush, 0, 'X', 0, 0); + wpaint_do_radial_symmetry(C, ob, wp, sd, wpd, wpi, me, brush, 0, 'X'); + wpaint_do_radial_symmetry(C, ob, wp, sd, wpd, wpi, me, brush, 0, 'Y'); + wpaint_do_radial_symmetry(C, ob, wp, sd, wpd, wpi, me, brush, 0, 'Z'); + + cache->symmetry = symm; + + if (me->editflag & ME_EDIT_MIRROR_VERTEX_GROUPS) { + /* We don't do any symmetry strokes when mirroring vertex groups. */ + copy_v3_v3(cache->true_last_location, cache->true_location); + cache->is_last_valid = true; + return; + } + + /* symm is a bit combination of XYZ - 1 is mirror + * X; 2 is Y; 3 is XY; 4 is Z; 5 is XZ; 6 is YZ; 7 is XYZ */ + for (i = 1; i <= symm; i++) { + if ((symm & i && (symm != 5 || i != 3) && (symm != 6 || (!ELEM(i, 3, 5))))) { + cache->mirror_symmetry_pass = i; + cache->radial_symmetry_pass = 0; + SCULPT_cache_calc_brushdata_symm(cache, i, 0, 0); + + if (i & (1 << 0)) { + wpaint_do_paint(C, ob, wp, sd, wpd, wpi, me, brush, i, 'X', 0, 0); + wpaint_do_radial_symmetry(C, ob, wp, sd, wpd, wpi, me, brush, i, 'X'); + } + if (i & (1 << 1)) { + wpaint_do_paint(C, ob, wp, sd, wpd, wpi, me, brush, i, 'Y', 0, 0); + wpaint_do_radial_symmetry(C, ob, wp, sd, wpd, wpi, me, brush, i, 'Y'); + } + if (i & (1 << 2)) { + wpaint_do_paint(C, ob, wp, sd, wpd, wpi, me, brush, i, 'Z', 0, 0); + wpaint_do_radial_symmetry(C, ob, wp, sd, wpd, wpi, me, brush, i, 'Z'); + } + } + } + copy_v3_v3(cache->true_last_location, cache->true_location); + cache->is_last_valid = true; +} + +static void wpaint_stroke_update_step(bContext *C, + wmOperator *UNUSED(op), + struct PaintStroke *stroke, + PointerRNA *itemptr) +{ + Scene *scene = CTX_data_scene(C); + ToolSettings *ts = CTX_data_tool_settings(C); + VPaint *wp = ts->wpaint; + Brush *brush = BKE_paint_brush(&wp->paint); + struct WPaintData *wpd = (WPaintData *)paint_stroke_mode_data(stroke); + ViewContext *vc; + Object *ob = CTX_data_active_object(C); + + SculptSession *ss = ob->sculpt; + Sculpt *sd = CTX_data_tool_settings(C)->sculpt; + + vwpaint_update_cache_variants(C, wp, ob, itemptr); + + float mat[4][4]; + + const float brush_alpha_value = BKE_brush_alpha_get(scene, brush); + + /* intentionally don't initialize as NULL, make sure we initialize all members below */ + WeightPaintInfo wpi; + + /* cannot paint if there is no stroke data */ + if (wpd == NULL) { + /* XXX: force a redraw here, since even though we can't paint, + * at least view won't freeze until stroke ends */ + ED_region_tag_redraw(CTX_wm_region(C)); + return; + } + + vc = &wpd->vc; + ob = vc->obact; + + view3d_operator_needs_opengl(C); + ED_view3d_init_mats_rv3d(ob, vc->rv3d); + + /* load projection matrix */ + mul_m4_m4m4(mat, vc->rv3d->persmat, ob->obmat); + + /* *** setup WeightPaintInfo - pass onto do_weight_paint_vertex *** */ + wpi.defbase_tot = wpd->defbase_tot; + wpi.defbase_sel = wpd->defbase_sel; + wpi.defbase_tot_sel = wpd->defbase_tot_sel; + + wpi.defbase_tot_unsel = wpi.defbase_tot - wpi.defbase_tot_sel; + wpi.active = wpd->active; + wpi.mirror = wpd->mirror; + wpi.lock_flags = wpd->lock_flags; + wpi.vgroup_validmap = wpd->vgroup_validmap; + wpi.vgroup_locked = wpd->vgroup_locked; + wpi.vgroup_unlocked = wpd->vgroup_unlocked; + wpi.do_flip = RNA_boolean_get(itemptr, "pen_flip") || ss->cache->invert; + wpi.do_multipaint = wpd->do_multipaint; + wpi.do_auto_normalize = ((ts->auto_normalize != 0) && (wpi.vgroup_validmap != NULL) && + (wpi.do_multipaint || wpi.vgroup_validmap[wpi.active.index])); + wpi.do_lock_relative = wpd->do_lock_relative; + wpi.is_normalized = wpi.do_auto_normalize || wpi.do_lock_relative; + wpi.brush_alpha_value = brush_alpha_value; + /* *** done setting up WeightPaintInfo *** */ + + if (wpd->precomputed_weight) { + precompute_weight_values(C, ob, brush, wpd, &wpi, (Mesh *)ob->data); + } + + wpaint_do_symmetrical_brush_actions(C, ob, wp, sd, wpd, &wpi); + + swap_m4m4(vc->rv3d->persmat, mat); + + /* Calculate pivot for rotation around selection if needed. + * also needed for "Frame Selected" on last stroke. */ + float loc_world[3]; + mul_v3_m4v3(loc_world, ob->obmat, ss->cache->true_location); + paint_last_stroke_update(scene, loc_world); + + BKE_mesh_batch_cache_dirty_tag((Mesh *)ob->data, BKE_MESH_BATCH_DIRTY_ALL); + + DEG_id_tag_update((ID *)ob->data, 0); + WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, ob); + swap_m4m4(wpd->vc.rv3d->persmat, mat); + + rcti r; + if (SCULPT_get_redraw_rect(vc->region, CTX_wm_region_view3d(C), ob, &r)) { + if (ss->cache) { + ss->cache->current_r = r; + } + + /* previous is not set in the current cache else + * the partial rect will always grow */ + if (ss->cache) { + if (!BLI_rcti_is_empty(&ss->cache->previous_r)) { + BLI_rcti_union(&r, &ss->cache->previous_r); + } + } + + r.xmin += vc->region->winrct.xmin - 2; + r.xmax += vc->region->winrct.xmin + 2; + r.ymin += vc->region->winrct.ymin - 2; + r.ymax += vc->region->winrct.ymin + 2; + } + ED_region_tag_redraw_partial(vc->region, &r, true); +} + +static void wpaint_stroke_done(const bContext *C, struct PaintStroke *stroke) +{ + Object *ob = CTX_data_active_object(C); + struct WPaintData *wpd = (WPaintData *)paint_stroke_mode_data(stroke); + + if (wpd) { + if (wpd->defbase_sel) { + MEM_freeN((void *)wpd->defbase_sel); + } + if (wpd->vgroup_validmap) { + MEM_freeN((void *)wpd->vgroup_validmap); + } + if (wpd->vgroup_locked) { + MEM_freeN((void *)wpd->vgroup_locked); + } + if (wpd->vgroup_unlocked) { + MEM_freeN((void *)wpd->vgroup_unlocked); + } + if (wpd->lock_flags) { + MEM_freeN((void *)wpd->lock_flags); + } + if (wpd->active.lock) { + MEM_freeN((void *)wpd->active.lock); + } + if (wpd->mirror.lock) { + MEM_freeN((void *)wpd->mirror.lock); + } + if (wpd->precomputed_weight) { + MEM_freeN(wpd->precomputed_weight); + } + + MEM_freeN(wpd); + } + + SculptSession *ss = ob->sculpt; + + if (ss->cache->alt_smooth) { + ToolSettings *ts = CTX_data_tool_settings(C); + VPaint *vp = ts->wpaint; + smooth_brush_toggle_off(C, &vp->paint, ss->cache); + } + + /* and particles too */ + if (ob->particlesystem.first) { + ParticleSystem *psys; + int i; + + for (psys = (ParticleSystem *)ob->particlesystem.first; psys; psys = psys->next) { + for (i = 0; i < PSYS_TOT_VG; i++) { + if (psys->vgroup[i] == BKE_object_defgroup_active_index_get(ob)) { + psys->recalc |= ID_RECALC_PSYS_RESET; + break; + } + } + } + } + + DEG_id_tag_update((ID *)ob->data, 0); + + WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, ob); + + SCULPT_cache_free(ob->sculpt->cache); + ob->sculpt->cache = NULL; +} + +static int wpaint_invoke(bContext *C, wmOperator *op, const wmEvent *event) +{ + int retval; + + op->customdata = paint_stroke_new(C, + op, + SCULPT_stroke_get_location, + wpaint_stroke_test_start, + wpaint_stroke_update_step, + NULL, + wpaint_stroke_done, + event->type); + + if ((retval = op->type->modal(C, op, event)) == OPERATOR_FINISHED) { + paint_stroke_free(C, op, (PaintStroke *)op->customdata); + return OPERATOR_FINISHED; + } + /* add modal handler */ + WM_event_add_modal_handler(C, op); + + OPERATOR_RETVAL_CHECK(retval); + BLI_assert(retval == OPERATOR_RUNNING_MODAL); + + return OPERATOR_RUNNING_MODAL; +} + +static int wpaint_exec(bContext *C, wmOperator *op) +{ + op->customdata = paint_stroke_new(C, + op, + SCULPT_stroke_get_location, + wpaint_stroke_test_start, + wpaint_stroke_update_step, + NULL, + wpaint_stroke_done, + 0); + + /* frees op->customdata */ + paint_stroke_exec(C, op, (PaintStroke *)op->customdata); + + return OPERATOR_FINISHED; +} + +static void wpaint_cancel(bContext *C, wmOperator *op) +{ + Object *ob = CTX_data_active_object(C); + if (ob->sculpt->cache) { + SCULPT_cache_free(ob->sculpt->cache); + ob->sculpt->cache = NULL; + } + + paint_stroke_cancel(C, op, (PaintStroke *)op->customdata); +} + +static int wpaint_modal(bContext *C, wmOperator *op, const wmEvent *event) +{ + return paint_stroke_modal(C, op, event, (struct PaintStroke **)&op->customdata); +} + +void PAINT_OT_weight_paint(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Weight Paint"; + ot->idname = "PAINT_OT_weight_paint"; + ot->description = "Paint a stroke in the current vertex group's weights"; + + /* api callbacks */ + ot->invoke = wpaint_invoke; + ot->modal = wpaint_modal; + ot->exec = wpaint_exec; + ot->poll = weight_paint_poll; + ot->cancel = wpaint_cancel; + + /* flags */ + ot->flag = OPTYPE_UNDO | OPTYPE_BLOCKING; + + paint_stroke_operator_properties(ot); +} + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Toggle Vertex Paint Operator + * \{ */ + +/** + * \note Keep in sync with #wpaint_mode_toggle_exec + */ +static int vpaint_mode_toggle_exec(bContext *C, wmOperator *op) +{ + Main *bmain = CTX_data_main(C); + struct wmMsgBus *mbus = CTX_wm_message_bus(C); + Object *ob = CTX_data_active_object(C); + const int mode_flag = OB_MODE_VERTEX_PAINT; + const bool is_mode_set = (ob->mode & mode_flag) != 0; + Scene *scene = CTX_data_scene(C); + ToolSettings *ts = scene->toolsettings; + + if (!is_mode_set) { + if (!ED_object_mode_compat_set(C, ob, (eObjectMode)mode_flag, op->reports)) { + return OPERATOR_CANCELLED; + } + } + + Mesh *me = BKE_mesh_from_object(ob); + + /* toggle: end vpaint */ + if (is_mode_set) { + ED_object_vpaintmode_exit_ex(ob); + } + else { + Depsgraph *depsgraph = CTX_data_depsgraph_on_load(C); + if (depsgraph) { + depsgraph = CTX_data_ensure_evaluated_depsgraph(C); + } + ED_object_vpaintmode_enter_ex(bmain, depsgraph, scene, ob); + BKE_paint_toolslots_brush_validate(bmain, &ts->vpaint->paint); + } + + BKE_mesh_batch_cache_dirty_tag((Mesh *)ob->data, BKE_MESH_BATCH_DIRTY_ALL); + + /* update modifier stack for mapping requirements */ + DEG_id_tag_update(&me->id, 0); + + WM_event_add_notifier(C, NC_SCENE | ND_MODE, scene); + WM_msg_publish_rna_prop(mbus, &ob->id, ob, Object, mode); + + WM_toolsystem_update_from_context_view3d(C); + + return OPERATOR_FINISHED; +} + +void PAINT_OT_vertex_paint_toggle(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Vertex Paint Mode"; + ot->idname = "PAINT_OT_vertex_paint_toggle"; + ot->description = "Toggle the vertex paint mode in 3D view"; + + /* api callbacks */ + ot->exec = vpaint_mode_toggle_exec; + ot->poll = paint_mode_toggle_poll_test; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; +} + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Vertex Paint Operator + * \{ */ + +/* Implementation notes: + * + * Operator->invoke() + * - Validate context (add #Mesh.mloopcol). + * - Create custom-data storage. + * - Call paint once (mouse click). + * - Add modal handler. + * + * Operator->modal() + * - For every mouse-move, apply vertex paint. + * - Exit on mouse release, free custom-data. + * (return OPERATOR_FINISHED also removes handler and operator) + * + * For future: + * - implement a stroke event (or mouse-move with past positions). + * - revise whether op->customdata should be added in object, in set_vpaint. + */ + +struct VPaintDataBase { + ViewContext vc; + AttributeDomain domain; + CustomDataType type; +}; + +template<typename Color, typename Traits, AttributeDomain domain> +struct VPaintData : public VPaintDataBase { + struct NormalAnglePrecalc normal_angle_precalc; + + Color paintcol; + + struct VertProjHandle *vp_handle; + struct CoNo *vertexcosnos; + + /** + * Modify #Mesh.mloopcol directly, since the derived mesh is drawing from this + * array, otherwise we need to refresh the modifier stack. + */ + bool use_fast_update; + + /* loops tagged as having been painted, to apply shared vertex color + * blending only to modified loops */ + bool *mlooptag; + + bool is_texbrush; + + /* Special storage for smear brush, avoid feedback loop - update each step. */ + struct { + void *color_prev; + void *color_curr; + } smear; +}; + +template<typename Color, typename Traits, AttributeDomain domain> +static void *vpaint_init_vpaint(bContext *C, + struct wmOperator *op, + Scene *scene, + Depsgraph *depsgraph, + VPaint *vp, + Object *ob, + Mesh *me, + const Brush *brush) +{ + VPaintData<Color, Traits, domain> *vpd; + + size_t elem_size; + int elem_num = get_vcol_elements(me, &elem_size); + /* make mode data storage */ + vpd = MEM_new<VPaintData<Color, Traits, domain>>("VPaintData"); + + if constexpr (std::is_same_v<Color, ColorPaint4f>) { + vpd->type = CD_PROP_COLOR; + } + else { + vpd->type = CD_PROP_BYTE_COLOR; + } + + vpd->domain = domain; + + ED_view3d_viewcontext_init(C, &vpd->vc, depsgraph); + view_angle_limits_init(&vpd->normal_angle_precalc, + vp->paint.brush->falloff_angle, + (vp->paint.brush->flag & BRUSH_FRONTFACE_FALLOFF) != 0); + + vpd->paintcol = vpaint_get_current_col<Color, Traits, domain>( + scene, vp, (RNA_enum_get(op->ptr, "mode") == BRUSH_STROKE_INVERT)); + + vpd->is_texbrush = !(brush->vertexpaint_tool == VPAINT_TOOL_BLUR) && brush->mtex.tex; + + /* are we painting onto a modified mesh?, + * if not we can skip face map trickiness */ + if (vertex_paint_use_fast_update_check(ob)) { + vpd->use_fast_update = true; + } + else { + vpd->use_fast_update = false; + } + + /* to keep tracked of modified loops for shared vertex color blending */ + if (brush->vertexpaint_tool == VPAINT_TOOL_BLUR) { + vpd->mlooptag = (bool *)MEM_mallocN(sizeof(bool) * elem_num, "VPaintData mlooptag"); + } + + if (brush->vertexpaint_tool == VPAINT_TOOL_SMEAR) { + CustomDataLayer *layer = BKE_id_attributes_active_color_get(&me->id); + + vpd->smear.color_prev = MEM_malloc_arrayN(elem_num, elem_size, __func__); + memcpy(vpd->smear.color_prev, layer->data, elem_size * elem_num); + + vpd->smear.color_curr = (uint *)MEM_dupallocN(vpd->smear.color_prev); + } + + /* Create projection handle */ + if (vpd->is_texbrush) { + ob->sculpt->building_vp_handle = true; + vpd->vp_handle = ED_vpaint_proj_handle_create(depsgraph, scene, ob, &vpd->vertexcosnos); + ob->sculpt->building_vp_handle = false; + } + + return static_cast<void *>(vpd); +} + +static bool vpaint_stroke_test_start(bContext *C, struct wmOperator *op, const float mouse[2]) +{ + Scene *scene = CTX_data_scene(C); + ToolSettings *ts = scene->toolsettings; + struct PaintStroke *stroke = (PaintStroke *)op->customdata; + VPaint *vp = ts->vpaint; + Brush *brush = BKE_paint_brush(&vp->paint); + Object *ob = CTX_data_active_object(C); + Mesh *me; + SculptSession *ss = ob->sculpt; + Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C); + + /* context checks could be a poll() */ + me = BKE_mesh_from_object(ob); + if (me == NULL || me->totpoly == 0) { + return false; + } + + ED_mesh_color_ensure(me, NULL); + + CustomDataLayer *layer = BKE_id_attributes_active_color_get(&me->id); + if (!layer) { + return false; + } + + AttributeDomain domain = BKE_id_attribute_domain(&me->id, layer); + void *vpd = nullptr; + + if (domain == ATTR_DOMAIN_POINT) { + if (layer->type == CD_PROP_COLOR) { + vpd = vpaint_init_vpaint<ColorPaint4f, FloatTraits, ATTR_DOMAIN_POINT>( + C, op, scene, depsgraph, vp, ob, me, brush); + } + else if (layer->type == CD_PROP_BYTE_COLOR) { + vpd = vpaint_init_vpaint<ColorPaint4b, ByteTraits, ATTR_DOMAIN_POINT>( + C, op, scene, depsgraph, vp, ob, me, brush); + } + } + else if (domain == ATTR_DOMAIN_CORNER) { + if (layer->type == CD_PROP_COLOR) { + vpd = vpaint_init_vpaint<ColorPaint4f, FloatTraits, ATTR_DOMAIN_CORNER>( + C, op, scene, depsgraph, vp, ob, me, brush); + } + else if (layer->type == CD_PROP_BYTE_COLOR) { + vpd = vpaint_init_vpaint<ColorPaint4b, ByteTraits, ATTR_DOMAIN_CORNER>( + C, op, scene, depsgraph, vp, ob, me, brush); + } + } + + BLI_assert(vpd != nullptr); + + paint_stroke_set_mode_data(stroke, vpd); + + /* If not previously created, create vertex/weight paint mode session data */ + vertex_paint_init_stroke(scene, depsgraph, ob); + vwpaint_update_cache_invariants(C, vp, ss, op, mouse); + vertex_paint_init_session_data(ts, ob); + + return true; +} + +template<class Color = ColorPaint4b, typename Traits = ByteTraits> +static void do_vpaint_brush_blur_loops(bContext *C, + Sculpt *sd, + VPaint *vp, + VPaintData<Color, Traits, ATTR_DOMAIN_CORNER> *vpd, + Object *ob, + Mesh *me, + PBVHNode **nodes, + int totnode, + Color *lcol) +{ + using Value = typename Traits::ValueType; + using Blend = typename Traits::BlendType; + + SculptSession *ss = ob->sculpt; + + const Brush *brush = ob->sculpt->cache->brush; + const Scene *scene = CTX_data_scene(C); + + Color *previous_color = static_cast<Color *>(ss->cache->prev_colors_vpaint); + + blender::threading::parallel_for(IndexRange(totnode), 1LL, [&](IndexRange range) { + for (int n : range) { + const PBVHType pbvh_type = BKE_pbvh_type(ss->pbvh); + const bool has_grids = (pbvh_type == PBVH_GRIDS); + + const struct SculptVertexPaintGeomMap *gmap = &ss->mode.vpaint.gmap; + const StrokeCache *cache = ss->cache; + float brush_size_pressure, brush_alpha_value, brush_alpha_pressure; + get_brush_alpha_data( + scene, ss, brush, &brush_size_pressure, &brush_alpha_value, &brush_alpha_pressure); + const bool use_normal = vwpaint_use_normal(vp); + const bool use_vert_sel = (me->editflag & + (ME_EDIT_PAINT_FACE_SEL | ME_EDIT_PAINT_VERT_SEL)) != 0; + const bool use_face_sel = (me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0; + + SculptBrushTest test; + SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape( + ss, &test, brush->falloff_shape); + const float *sculpt_normal_frontface = SCULPT_brush_frontface_normal_from_falloff_shape( + ss, brush->falloff_shape); + + /* For each vertex */ + PBVHVertexIter vd; + BKE_pbvh_vertex_iter_begin (ss->pbvh, nodes[n], vd, PBVH_ITER_UNIQUE) { + /* Test to see if the vertex coordinates are within the spherical brush region. */ + if (sculpt_brush_test_sq_fn(&test, vd.co)) { + /* For grid based pbvh, take the vert whose loop corresponds to the current grid. + * Otherwise, take the current vert. */ + const int v_index = has_grids ? me->mloop[vd.grid_indices[vd.g]].v : + vd.vert_indices[vd.i]; + const float grid_alpha = has_grids ? 1.0f / vd.gridsize : 1.0f; + const MVert *mv = &me->mvert[v_index]; + + /* If the vertex is selected for painting. */ + if (!use_vert_sel || mv->flag & SELECT) { + float brush_strength = cache->bstrength; + const float angle_cos = (use_normal && vd.no) ? + dot_v3v3(sculpt_normal_frontface, vd.no) : + 1.0f; + if (((brush->flag & BRUSH_FRONTFACE) == 0 || (angle_cos > 0.0f)) && + ((brush->flag & BRUSH_FRONTFACE_FALLOFF) == 0 || + view_angle_limits_apply_falloff( + &vpd->normal_angle_precalc, angle_cos, &brush_strength))) { + const float brush_fade = BKE_brush_curve_strength( + brush, sqrtf(test.dist), cache->radius); + + /* Get the average poly color */ + Color color_final(0, 0, 0, 0); + + int total_hit_loops = 0; + Blend blend[4] = {0}; + + for (int j = 0; j < gmap->vert_to_poly[v_index].count; j++) { + int p_index = gmap->vert_to_poly[v_index].indices[j]; + const MPoly *mp = &me->mpoly[p_index]; + if (!use_face_sel || mp->flag & ME_FACE_SEL) { + total_hit_loops += mp->totloop; + for (int k = 0; k < mp->totloop; k++) { + const uint l_index = mp->loopstart + k; + Color *col = lcol + l_index; + + /* Color is squared to compensate the sqrt color encoding. */ + blend[0] += (Blend)col->r * (Blend)col->r; + blend[1] += (Blend)col->g * (Blend)col->g; + blend[2] += (Blend)col->b * (Blend)col->b; + blend[3] += (Blend)col->a * (Blend)col->a; + } + } + } + + if (total_hit_loops != 0) { + /* Use rgb^2 color averaging. */ + Color *col = &color_final; + + color_final.r = Traits::round( + sqrtf(Traits::divide_round(blend[0], total_hit_loops))); + color_final.g = Traits::round( + sqrtf(Traits::divide_round(blend[1], total_hit_loops))); + color_final.b = Traits::round( + sqrtf(Traits::divide_round(blend[2], total_hit_loops))); + color_final.a = Traits::round( + sqrtf(Traits::divide_round(blend[3], total_hit_loops))); + + /* For each poly owning this vert, + * paint each loop belonging to this vert. */ + for (int j = 0; j < gmap->vert_to_poly[v_index].count; j++) { + const int p_index = gmap->vert_to_poly[v_index].indices[j]; + const int l_index = gmap->vert_to_loop[v_index].indices[j]; + BLI_assert(me->mloop[l_index].v == v_index); + const MPoly *mp = &me->mpoly[p_index]; + if (!use_face_sel || mp->flag & ME_FACE_SEL) { + Color color_orig(0, 0, 0, 0); /* unused when array is NULL */ + + if (previous_color != NULL) { + /* Get the previous loop color */ + if (isZero(previous_color[l_index])) { + previous_color[l_index] = lcol[l_index]; + } + color_orig = previous_color[l_index]; + } + const float final_alpha = Traits::range * brush_fade * brush_strength * + brush_alpha_pressure * grid_alpha; + /* Mix the new color with the original + * based on the brush strength and the curve. */ + lcol[l_index] = vpaint_blend<Color, Traits>(vp, + lcol[l_index], + color_orig, + *col, + final_alpha, + Traits::range * brush_strength); + } + } + } + } + } + } + } + BKE_pbvh_vertex_iter_end; + }; + }); +} + +template<class Color = ColorPaint4b, typename Traits = ByteTraits> +static void do_vpaint_brush_blur_verts(bContext *C, + Sculpt *sd, + VPaint *vp, + VPaintData<Color, Traits, ATTR_DOMAIN_POINT> *vpd, + Object *ob, + Mesh *me, + PBVHNode **nodes, + int totnode, + Color *lcol) +{ + using Value = typename Traits::ValueType; + using Blend = typename Traits::BlendType; + + SculptSession *ss = ob->sculpt; + + const Brush *brush = ob->sculpt->cache->brush; + const Scene *scene = CTX_data_scene(C); + + Color *previous_color = static_cast<Color *>(ss->cache->prev_colors_vpaint); + + blender::threading::parallel_for(IndexRange(totnode), 1LL, [&](IndexRange range) { + for (int n : range) { + const PBVHType pbvh_type = BKE_pbvh_type(ss->pbvh); + const bool has_grids = (pbvh_type == PBVH_GRIDS); + + const struct SculptVertexPaintGeomMap *gmap = &ss->mode.vpaint.gmap; + const StrokeCache *cache = ss->cache; + float brush_size_pressure, brush_alpha_value, brush_alpha_pressure; + get_brush_alpha_data( + scene, ss, brush, &brush_size_pressure, &brush_alpha_value, &brush_alpha_pressure); + const bool use_normal = vwpaint_use_normal(vp); + const bool use_vert_sel = (me->editflag & + (ME_EDIT_PAINT_FACE_SEL | ME_EDIT_PAINT_VERT_SEL)) != 0; + const bool use_face_sel = (me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0; + + SculptBrushTest test; + SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape( + ss, &test, brush->falloff_shape); + const float *sculpt_normal_frontface = SCULPT_brush_frontface_normal_from_falloff_shape( + ss, brush->falloff_shape); + + /* For each vertex */ + PBVHVertexIter vd; + BKE_pbvh_vertex_iter_begin (ss->pbvh, nodes[n], vd, PBVH_ITER_UNIQUE) { + /* Test to see if the vertex coordinates are within the spherical brush region. */ + if (sculpt_brush_test_sq_fn(&test, vd.co)) { + /* For grid based pbvh, take the vert whose loop corresponds to the current grid. + * Otherwise, take the current vert. */ + const int v_index = has_grids ? me->mloop[vd.grid_indices[vd.g]].v : + vd.vert_indices[vd.i]; + const float grid_alpha = has_grids ? 1.0f / vd.gridsize : 1.0f; + const MVert *mv = &me->mvert[v_index]; + + /* If the vertex is selected for painting. */ + if (!use_vert_sel || mv->flag & SELECT) { + float brush_strength = cache->bstrength; + const float angle_cos = (use_normal && vd.no) ? + dot_v3v3(sculpt_normal_frontface, vd.no) : + 1.0f; + if (((brush->flag & BRUSH_FRONTFACE) == 0 || (angle_cos > 0.0f)) && + ((brush->flag & BRUSH_FRONTFACE_FALLOFF) == 0 || + view_angle_limits_apply_falloff( + &vpd->normal_angle_precalc, angle_cos, &brush_strength))) { + const float brush_fade = BKE_brush_curve_strength( + brush, sqrtf(test.dist), cache->radius); + + /* Get the average poly color */ + Color color_final(0, 0, 0, 0); + + int total_hit_loops = 0; + Blend blend[4] = {0}; + + for (int j = 0; j < gmap->vert_to_poly[v_index].count; j++) { + int p_index = gmap->vert_to_poly[v_index].indices[j]; + const MPoly *mp = &me->mpoly[p_index]; + if (!use_face_sel || mp->flag & ME_FACE_SEL) { + total_hit_loops += mp->totloop; + for (int k = 0; k < mp->totloop; k++) { + const uint l_index = mp->loopstart + k; + const uint v_index = me->mloop[l_index].v; + + Color *col = lcol + v_index; + + /* Color is squared to compensate the sqrt color encoding. */ + blend[0] += (Blend)col->r * (Blend)col->r; + blend[1] += (Blend)col->g * (Blend)col->g; + blend[2] += (Blend)col->b * (Blend)col->b; + blend[3] += (Blend)col->a * (Blend)col->a; + } + } + } + + if (total_hit_loops != 0) { + /* Use rgb^2 color averaging. */ + Color *col = &color_final; + + color_final.r = Traits::round( + sqrtf(Traits::divide_round(blend[0], total_hit_loops))); + color_final.g = Traits::round( + sqrtf(Traits::divide_round(blend[1], total_hit_loops))); + color_final.b = Traits::round( + sqrtf(Traits::divide_round(blend[2], total_hit_loops))); + color_final.a = Traits::round( + sqrtf(Traits::divide_round(blend[3], total_hit_loops))); + + /* For each poly owning this vert, + * paint each loop belonging to this vert. */ + for (int j = 0; j < gmap->vert_to_poly[v_index].count; j++) { + const int p_index = gmap->vert_to_poly[v_index].indices[j]; + + BLI_assert(me->mloop[l_index].v == v_index); + const MPoly *mp = &me->mpoly[p_index]; + if (!use_face_sel || mp->flag & ME_FACE_SEL) { + Color color_orig(0, 0, 0, 0); /* unused when array is NULL */ + + if (previous_color != NULL) { + /* Get the previous loop color */ + if (isZero(previous_color[v_index])) { + previous_color[v_index] = lcol[v_index]; + } + color_orig = previous_color[v_index]; + } + const float final_alpha = Traits::range * brush_fade * brush_strength * + brush_alpha_pressure * grid_alpha; + /* Mix the new color with the original + * based on the brush strength and the curve. */ + lcol[v_index] = vpaint_blend<Color, Traits>(vp, + lcol[v_index], + color_orig, + *col, + final_alpha, + Traits::range * brush_strength); + } + } + } + } + } + } + } + BKE_pbvh_vertex_iter_end; + }; + }); +} + +template<typename Color = ColorPaint4b, typename Traits, AttributeDomain domain> +static void do_vpaint_brush_smear(bContext *C, + Sculpt *sd, + VPaint *vp, + VPaintData<Color, Traits, domain> *vpd, + Object *ob, + Mesh *me, + PBVHNode **nodes, + int totnode, + Color *lcol) +{ + using Value = typename Traits::ValueType; + using Blend = typename Traits::BlendType; + + SculptSession *ss = ob->sculpt; + + const struct SculptVertexPaintGeomMap *gmap = &ss->mode.vpaint.gmap; + const StrokeCache *cache = ss->cache; + const PBVHType pbvh_type = BKE_pbvh_type(ss->pbvh); + const bool has_grids = (pbvh_type == PBVH_GRIDS); + + const Brush *brush = ob->sculpt->cache->brush; + const Scene *scene = CTX_data_scene(C); + Color *color_curr = static_cast<Color *>(vpd->smear.color_curr); + Color *color_prev_smear = static_cast<Color *>(vpd->smear.color_prev); + Color *color_prev = reinterpret_cast<Color *>(ss->cache->prev_colors_vpaint); + + blender::threading::parallel_for(IndexRange(totnode), 1LL, [&](IndexRange range) { + for (int n : range) { + float brush_size_pressure, brush_alpha_value, brush_alpha_pressure; + + get_brush_alpha_data( + scene, ss, brush, &brush_size_pressure, &brush_alpha_value, &brush_alpha_pressure); + float brush_dir[3]; + const bool use_normal = vwpaint_use_normal(vp); + const bool use_vert_sel = (me->editflag & + (ME_EDIT_PAINT_FACE_SEL | ME_EDIT_PAINT_VERT_SEL)) != 0; + const bool use_face_sel = (me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0; + + sub_v3_v3v3(brush_dir, cache->location, cache->last_location); + project_plane_v3_v3v3(brush_dir, brush_dir, cache->view_normal); + + if (cache->is_last_valid && (normalize_v3(brush_dir) != 0.0f)) { + + SculptBrushTest test; + SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape( + ss, &test, brush->falloff_shape); + const float *sculpt_normal_frontface = SCULPT_brush_frontface_normal_from_falloff_shape( + ss, brush->falloff_shape); + + /* For each vertex */ + PBVHVertexIter vd; + BKE_pbvh_vertex_iter_begin (ss->pbvh, nodes[n], vd, PBVH_ITER_UNIQUE) { + /* Test to see if the vertex coordinates are within the spherical brush region. */ + if (sculpt_brush_test_sq_fn(&test, vd.co)) { + /* For grid based pbvh, take the vert whose loop corresponds to the current grid. + * Otherwise, take the current vert. */ + const int v_index = has_grids ? me->mloop[vd.grid_indices[vd.g]].v : + vd.vert_indices[vd.i]; + const float grid_alpha = has_grids ? 1.0f / vd.gridsize : 1.0f; + const MVert *mv_curr = &me->mvert[v_index]; + + /* if the vertex is selected for painting. */ + if (!use_vert_sel || mv_curr->flag & SELECT) { + /* Calc the dot prod. between ray norm on surf and current vert + * (ie splash prevention factor), and only paint front facing verts. */ + float brush_strength = cache->bstrength; + const float angle_cos = (use_normal && vd.no) ? + dot_v3v3(sculpt_normal_frontface, vd.no) : + 1.0f; + if (((brush->flag & BRUSH_FRONTFACE) == 0 || (angle_cos > 0.0f)) && + ((brush->flag & BRUSH_FRONTFACE_FALLOFF) == 0 || + view_angle_limits_apply_falloff( + &vpd->normal_angle_precalc, angle_cos, &brush_strength))) { + const float brush_fade = BKE_brush_curve_strength( + brush, sqrtf(test.dist), cache->radius); + + bool do_color = false; + /* Minimum dot product between brush direction and current + * to neighbor direction is 0.0, meaning orthogonal. */ + float stroke_dot_max = 0.0f; + + /* Get the color of the loop in the opposite + * direction of the brush movement */ + Color color_final(0, 0, 0, 0); + + for (int j = 0; j < gmap->vert_to_poly[v_index].count; j++) { + const int p_index = gmap->vert_to_poly[v_index].indices[j]; + const int l_index = gmap->vert_to_loop[v_index].indices[j]; + BLI_assert(me->mloop[l_index].v == v_index); + UNUSED_VARS_NDEBUG(l_index); + const MPoly *mp = &me->mpoly[p_index]; + if (!use_face_sel || mp->flag & ME_FACE_SEL) { + const MLoop *ml_other = &me->mloop[mp->loopstart]; + for (int k = 0; k < mp->totloop; k++, ml_other++) { + const uint v_other_index = ml_other->v; + if (v_other_index != v_index) { + const MVert *mv_other = &me->mvert[v_other_index]; + + /* Get the direction from the + * selected vert to the neighbor. */ + float other_dir[3]; + sub_v3_v3v3(other_dir, mv_curr->co, mv_other->co); + project_plane_v3_v3v3(other_dir, other_dir, cache->view_normal); + + normalize_v3(other_dir); + + const float stroke_dot = dot_v3v3(other_dir, brush_dir); + int elem_index; + + if constexpr (domain == ATTR_DOMAIN_POINT) { + elem_index = ml_other->v; + } + else { + elem_index = mp->loopstart + k; + } + + if (stroke_dot > stroke_dot_max) { + stroke_dot_max = stroke_dot; + color_final = color_prev_smear[elem_index]; + do_color = true; + } + } + } + } + } + + if (do_color) { + const float final_alpha = Traits::range * brush_fade * brush_strength * + brush_alpha_pressure * grid_alpha; + + /* For each poly owning this vert, + * paint each loop belonging to this vert. */ + for (int j = 0; j < gmap->vert_to_poly[v_index].count; j++) { + const int p_index = gmap->vert_to_poly[v_index].indices[j]; + const int l_index = gmap->vert_to_loop[v_index].indices[j]; + + int elem_index; + if constexpr (domain == ATTR_DOMAIN_POINT) { + elem_index = v_index; + } + else { + elem_index = l_index; + } + + BLI_assert(me->mloop[l_index].v == v_index); + + const MPoly *mp = &me->mpoly[p_index]; + if (!use_face_sel || mp->flag & ME_FACE_SEL) { + /* Get the previous element color */ + Color color_orig(0, 0, 0, 0); /* unused when array is NULL */ + + if (color_prev != NULL) { + /* Get the previous element color */ + if (isZero(color_prev[elem_index])) { + color_prev[elem_index] = lcol[elem_index]; + } + color_orig = color_prev[elem_index]; + } + /* Mix the new color with the original + * based on the brush strength and the curve. */ + lcol[elem_index] = vpaint_blend<Color, Traits>(vp, + lcol[elem_index], + color_orig, + color_final, + final_alpha, + Traits::range * + brush_strength); + + color_curr[elem_index] = lcol[elem_index]; + } + } + } + } + } + } + } + BKE_pbvh_vertex_iter_end; + } + } + }); +} + +template<typename Color, typename Traits, AttributeDomain domain> +static void calculate_average_color(VPaintData<Color, Traits, domain> *vpd, + Object *ob, + Mesh *me, + const Brush *brush, + Color *lcol, + PBVHNode **nodes, + int totnode) +{ + using Blend = typename Traits::BlendType; + using Value = typename Traits::ValueType; + + struct VPaintAverageAccum<Blend> *accum = (VPaintAverageAccum<Blend> *)MEM_mallocN( + sizeof(*accum) * totnode, __func__); + blender::threading::parallel_for(IndexRange(totnode), 1LL, [&](IndexRange range) { + for (int n : range) { + SculptSession *ss = ob->sculpt; + const PBVHType pbvh_type = BKE_pbvh_type(ss->pbvh); + const bool has_grids = (pbvh_type == PBVH_GRIDS); + const struct SculptVertexPaintGeomMap *gmap = &ss->mode.vpaint.gmap; + + StrokeCache *cache = ss->cache; + const bool use_vert_sel = (me->editflag & + (ME_EDIT_PAINT_FACE_SEL | ME_EDIT_PAINT_VERT_SEL)) != 0; + + struct VPaintAverageAccum<Blend> *accum2 = accum + n; + accum2->len = 0; + memset(accum2->value, 0, sizeof(accum2->value)); + + SculptBrushTest test; + SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape( + ss, &test, brush->falloff_shape); + + /* For each vertex */ + PBVHVertexIter vd; + BKE_pbvh_vertex_iter_begin (ss->pbvh, nodes[n], vd, PBVH_ITER_UNIQUE) { + /* Test to see if the vertex coordinates are within the spherical brush region. */ + if (sculpt_brush_test_sq_fn(&test, vd.co)) { + const int v_index = has_grids ? me->mloop[vd.grid_indices[vd.g]].v : + vd.vert_indices[vd.i]; + if (BKE_brush_curve_strength(brush, 0.0, cache->radius) > 0.0) { + /* If the vertex is selected for painting. */ + const MVert *mv = &me->mvert[v_index]; + if (!use_vert_sel || mv->flag & SELECT) { + accum2->len += gmap->vert_to_loop[v_index].count; + /* if a vertex is within the brush region, then add its color to the blend. */ + for (int j = 0; j < gmap->vert_to_loop[v_index].count; j++) { + int elem_index; + + if constexpr (domain == ATTR_DOMAIN_CORNER) { + elem_index = gmap->vert_to_loop[v_index].indices[j]; + } + else { + elem_index = v_index; + } + + Color *col = lcol + elem_index; + + /* Color is squared to compensate the sqrt color encoding. */ + accum2->value[0] += col->r * col->r; + accum2->value[1] += col->g * col->g; + accum2->value[2] += col->b * col->b; + } + } + } + } + } + BKE_pbvh_vertex_iter_end; + } + }); + + Blend accum_len = 0; + Blend accum_value[3] = {0}; + Color blend(0, 0, 0, 0); + + for (int i = 0; i < totnode; i++) { + accum_len += accum[i].len; + accum_value[0] += accum[i].value[0]; + accum_value[1] += accum[i].value[1]; + accum_value[2] += accum[i].value[2]; + } + if (accum_len != 0) { + blend.r = Traits::round(sqrtf(Traits::divide_round(accum_value[0], accum_len))); + blend.g = Traits::round(sqrtf(Traits::divide_round(accum_value[1], accum_len))); + blend.b = Traits::round(sqrtf(Traits::divide_round(accum_value[2], accum_len))); + blend.a = Traits::range; + + vpd->paintcol = blend; + } +} + +template<typename Color, typename Traits, AttributeDomain domain> +static float paint_and_tex_color_alpha(VPaint *vp, + VPaintData<Color, Traits, domain> *vpd, + const float v_co[3], + Color *r_color) +{ + using Value = typename Traits::ValueType; + + ColorPaint4f rgba; + ColorPaint4f rgba_br = toFloat(*r_color); + + paint_and_tex_color_alpha_intern(vp, &vpd->vc, v_co, &rgba.r); + + rgb_uchar_to_float(&rgba_br.r, (const uchar *)&vpd->paintcol); + mul_v3_v3(rgba_br, rgba); + + *r_color = fromFloat<Color>(rgba_br); + return rgba[3]; +} + +template<typename Color, typename Traits, AttributeDomain domain> +static void vpaint_do_draw(bContext *C, + Sculpt *sd, + VPaint *vp, + VPaintData<Color, Traits, domain> *vpd, + Object *ob, + Mesh *me, + PBVHNode **nodes, + int totnode, + Color *lcol) +{ + using Value = typename Traits::ValueType; + + SculptSession *ss = ob->sculpt; + const PBVHType pbvh_type = BKE_pbvh_type(ss->pbvh); + + const Brush *brush = ob->sculpt->cache->brush; + const Scene *scene = CTX_data_scene(C); + + Color *previous_color = static_cast<Color *>(ss->cache->prev_colors_vpaint); + + blender::threading::parallel_for(IndexRange(totnode), 1LL, [&](IndexRange range) { + for (int n : range) { + const bool has_grids = (pbvh_type == PBVH_GRIDS); + const struct SculptVertexPaintGeomMap *gmap = &ss->mode.vpaint.gmap; + + const StrokeCache *cache = ss->cache; + float brush_size_pressure, brush_alpha_value, brush_alpha_pressure; + get_brush_alpha_data( + scene, ss, brush, &brush_size_pressure, &brush_alpha_value, &brush_alpha_pressure); + const bool use_normal = vwpaint_use_normal(vp); + const bool use_vert_sel = (me->editflag & + (ME_EDIT_PAINT_FACE_SEL | ME_EDIT_PAINT_VERT_SEL)) != 0; + const bool use_face_sel = (me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0; + + SculptBrushTest test; + SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape( + ss, &test, brush->falloff_shape); + const float *sculpt_normal_frontface = SCULPT_brush_frontface_normal_from_falloff_shape( + ss, brush->falloff_shape); + + Color paintcol = vpd->paintcol; + + /* For each vertex */ + PBVHVertexIter vd; + BKE_pbvh_vertex_iter_begin (ss->pbvh, nodes[n], vd, PBVH_ITER_UNIQUE) { + /* Test to see if the vertex coordinates are within the spherical brush region. */ + if (sculpt_brush_test_sq_fn(&test, vd.co)) { + /* NOTE: Grids are 1:1 with corners (aka loops). + * For grid based pbvh, take the vert whose loop corresponds to the current grid. + * Otherwise, take the current vert. */ + const int v_index = has_grids ? me->mloop[vd.grid_indices[vd.g]].v : + vd.vert_indices[vd.i]; + const float grid_alpha = has_grids ? 1.0f / vd.gridsize : 1.0f; + const MVert *mv = &me->mvert[v_index]; + + /* If the vertex is selected for painting. */ + if (!use_vert_sel || mv->flag & SELECT) { + /* Calc the dot prod. between ray norm on surf and current vert + * (ie splash prevention factor), and only paint front facing verts. */ + float brush_strength = cache->bstrength; + const float angle_cos = (use_normal && vd.no) ? + dot_v3v3(sculpt_normal_frontface, vd.no) : + 1.0f; + if (((brush->flag & BRUSH_FRONTFACE) == 0 || (angle_cos > 0.0f)) && + ((brush->flag & BRUSH_FRONTFACE_FALLOFF) == 0 || + view_angle_limits_apply_falloff( + &vpd->normal_angle_precalc, angle_cos, &brush_strength))) { + const float brush_fade = BKE_brush_curve_strength( + brush, sqrtf(test.dist), cache->radius); + + Color color_final = paintcol; + + /* If we're painting with a texture, sample the texture color and alpha. */ + float tex_alpha = 1.0; + if (vpd->is_texbrush) { + /* NOTE: we may want to paint alpha as vertex color alpha. */ + tex_alpha = paint_and_tex_color_alpha<Color, Traits, domain>( + vp, vpd, vpd->vertexcosnos[v_index].co, &color_final); + } + + Color color_orig(0, 0, 0, 0); + + if constexpr (domain == ATTR_DOMAIN_POINT) { + int v_index = vd.index; + + if (previous_color != NULL) { + /* Get the previous loop color */ + if (isZero(previous_color[v_index])) { + previous_color[v_index] = lcol[v_index]; + } + color_orig = previous_color[v_index]; + } + const float final_alpha = Traits::frange * brush_fade * brush_strength * + tex_alpha * brush_alpha_pressure * grid_alpha; + + lcol[v_index] = vpaint_blend<Color, Traits>(vp, + lcol[v_index], + color_orig, + color_final, + final_alpha, + Traits::range * brush_strength); + } + else { + /* For each poly owning this vert, paint each loop belonging to this vert. */ + for (int j = 0; j < gmap->vert_to_poly[v_index].count; j++) { + const int p_index = gmap->vert_to_poly[v_index].indices[j]; + const int l_index = gmap->vert_to_loop[v_index].indices[j]; + BLI_assert(me->mloop[l_index].v == v_index); + const MPoly *mp = &me->mpoly[p_index]; + if (!use_face_sel || mp->flag & ME_FACE_SEL) { + Color color_orig = Color(0, 0, 0, 0); /* unused when array is NULL */ + + if (previous_color != NULL) { + /* Get the previous loop color */ + if (isZero(previous_color[l_index])) { + previous_color[l_index] = lcol[l_index]; + } + color_orig = previous_color[l_index]; + } + const float final_alpha = Traits::frange * brush_fade * brush_strength * + tex_alpha * brush_alpha_pressure * grid_alpha; + + /* Mix the new color with the original based on final_alpha. */ + lcol[l_index] = vpaint_blend<Color, Traits>(vp, + lcol[l_index], + color_orig, + color_final, + final_alpha, + Traits::range * brush_strength); + } + } + } + } + } + } + } + BKE_pbvh_vertex_iter_end; + } + }); +} + +template<typename Color, typename Traits, AttributeDomain domain> +static void vpaint_do_blur(bContext *C, + Sculpt *sd, + VPaint *vp, + VPaintData<Color, Traits, domain> *vpd, + Object *ob, + Mesh *me, + PBVHNode **nodes, + int totnode, + Color *lcol) +{ + if constexpr (domain == ATTR_DOMAIN_POINT) { + do_vpaint_brush_blur_verts<Color, Traits>(C, sd, vp, vpd, ob, me, nodes, totnode, lcol); + } + else { + do_vpaint_brush_blur_loops<Color, Traits>(C, sd, vp, vpd, ob, me, nodes, totnode, lcol); + } +} + +template<typename Color, typename Traits, AttributeDomain domain> +static void vpaint_paint_leaves(bContext *C, + Sculpt *sd, + VPaint *vp, + VPaintData<Color, Traits, domain> *vpd, + Object *ob, + Mesh *me, + Color *lcol, + PBVHNode **nodes, + int totnode) +{ + + for (int i : IndexRange(totnode)) { + SCULPT_undo_push_node(ob, nodes[i], SCULPT_UNDO_COLOR); + } + + const Brush *brush = ob->sculpt->cache->brush; + + switch ((eBrushVertexPaintTool)brush->vertexpaint_tool) { + case VPAINT_TOOL_AVERAGE: + calculate_average_color<Color, Traits, domain>(vpd, ob, me, brush, lcol, nodes, totnode); + case VPAINT_TOOL_DRAW: + vpaint_do_draw<Color, Traits, domain>(C, sd, vp, vpd, ob, me, nodes, totnode, lcol); + break; + case VPAINT_TOOL_BLUR: + vpaint_do_blur<Color, Traits, domain>(C, sd, vp, vpd, ob, me, nodes, totnode, lcol); + break; + case VPAINT_TOOL_SMEAR: + do_vpaint_brush_smear<Color, Traits, domain>(C, sd, vp, vpd, ob, me, nodes, totnode, lcol); + break; + default: + break; + } +} + +template<typename Color, typename Traits, AttributeDomain domain> +static void vpaint_do_paint(bContext *C, + Sculpt *sd, + VPaint *vp, + VPaintData<Color, Traits, domain> *vpd, + Object *ob, + Mesh *me, + Brush *brush, + const char symm, + const int axis, + const int i, + const float angle) +{ + SculptSession *ss = ob->sculpt; + ss->cache->radial_symmetry_pass = i; + SCULPT_cache_calc_brushdata_symm(ss->cache, symm, axis, angle); + + int totnode; + PBVHNode **nodes = vwpaint_pbvh_gather_generic(ob, vp, sd, brush, &totnode); + + CustomDataLayer *layer = BKE_id_attributes_active_color_get(&me->id); + Color *color_data = static_cast<Color *>(layer->data); + + /* Paint those leaves. */ + vpaint_paint_leaves<Color, Traits, domain>(C, sd, vp, vpd, ob, me, color_data, nodes, totnode); + + if (nodes) { + MEM_freeN(nodes); + } +} + +template<typename Color, typename Traits, AttributeDomain domain> +static void vpaint_do_radial_symmetry(bContext *C, + Sculpt *sd, + VPaint *vp, + VPaintData<Color, Traits, domain> *vpd, + Object *ob, + Mesh *me, + Brush *brush, + const char symm, + const int axis) +{ + for (int i = 1; i < vp->radial_symm[axis - 'X']; i++) { + const float angle = (2.0 * M_PI) * i / vp->radial_symm[axis - 'X']; + vpaint_do_paint<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, symm, axis, i, angle); + } +} + +/* near duplicate of: sculpt.c's, + * 'do_symmetrical_brush_actions' and 'wpaint_do_symmetrical_brush_actions'. */ +template<typename Color, typename Traits, AttributeDomain domain> +static void vpaint_do_symmetrical_brush_actions( + bContext *C, Sculpt *sd, VPaint *vp, VPaintData<Color, Traits, domain> *vpd, Object *ob) +{ + Brush *brush = BKE_paint_brush(&vp->paint); + Mesh *me = (Mesh *)ob->data; + SculptSession *ss = ob->sculpt; + StrokeCache *cache = ss->cache; + const char symm = SCULPT_mesh_symmetry_xyz_get(ob); + int i = 0; + + /* initial stroke */ + cache->mirror_symmetry_pass = 0; + vpaint_do_paint<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, i, 'X', 0, 0); + vpaint_do_radial_symmetry<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, i, 'X'); + vpaint_do_radial_symmetry<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, i, 'Y'); + vpaint_do_radial_symmetry<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, i, 'Z'); + + cache->symmetry = symm; + + /* symm is a bit combination of XYZ - 1 is mirror + * X; 2 is Y; 3 is XY; 4 is Z; 5 is XZ; 6 is YZ; 7 is XYZ */ + for (i = 1; i <= symm; i++) { + if (symm & i && (symm != 5 || i != 3) && (symm != 6 || (!ELEM(i, 3, 5)))) { + cache->mirror_symmetry_pass = i; + cache->radial_symmetry_pass = 0; + SCULPT_cache_calc_brushdata_symm(cache, i, 0, 0); + + if (i & (1 << 0)) { + vpaint_do_paint<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, i, 'X', 0, 0); + vpaint_do_radial_symmetry<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, i, 'X'); + } + if (i & (1 << 1)) { + vpaint_do_paint<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, i, 'Y', 0, 0); + vpaint_do_radial_symmetry<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, i, 'Y'); + } + if (i & (1 << 2)) { + vpaint_do_paint<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, i, 'Z', 0, 0); + vpaint_do_radial_symmetry<Color, Traits, domain>(C, sd, vp, vpd, ob, me, brush, i, 'Z'); + } + } + } + + copy_v3_v3(cache->true_last_location, cache->true_location); + cache->is_last_valid = true; +} + +template<typename Color, typename Traits, AttributeDomain domain> +static void vpaint_stroke_update_step_intern(bContext *C, + struct PaintStroke *stroke, + PointerRNA *itemptr) +{ + Scene *scene = CTX_data_scene(C); + ToolSettings *ts = CTX_data_tool_settings(C); + VPaintData<Color, Traits, domain> *vpd = static_cast<VPaintData<Color, Traits, domain> *>( + paint_stroke_mode_data(stroke)); + VPaint *vp = ts->vpaint; + ViewContext *vc = &vpd->vc; + Object *ob = vc->obact; + SculptSession *ss = ob->sculpt; + Sculpt *sd = CTX_data_tool_settings(C)->sculpt; + + vwpaint_update_cache_variants(C, vp, ob, itemptr); + + float mat[4][4]; + + ED_view3d_init_mats_rv3d(ob, vc->rv3d); + + /* load projection matrix */ + mul_m4_m4m4(mat, vc->rv3d->persmat, ob->obmat); + + swap_m4m4(vc->rv3d->persmat, mat); + + vpaint_do_symmetrical_brush_actions<Color, Traits, domain>(C, sd, vp, vpd, ob); + + swap_m4m4(vc->rv3d->persmat, mat); + + BKE_mesh_batch_cache_dirty_tag((Mesh *)ob->data, BKE_MESH_BATCH_DIRTY_ALL); + + if (vp->paint.brush->vertexpaint_tool == VPAINT_TOOL_SMEAR) { + Mesh *me = BKE_object_get_original_mesh(ob); + + size_t elem_size; + int elem_num; + + elem_num = get_vcol_elements(me, &elem_size); + memcpy(vpd->smear.color_prev, vpd->smear.color_curr, elem_size * elem_num); + } + + /* Calculate pivot for rotation around selection if needed. + * also needed for "Frame Selected" on last stroke. */ + float loc_world[3]; + mul_v3_m4v3(loc_world, ob->obmat, ss->cache->true_location); + paint_last_stroke_update(scene, loc_world); + + ED_region_tag_redraw(vc->region); + + if (vpd->use_fast_update == false) { + /* recalculate modifier stack to get new colors, slow, + * avoid this if we can! */ + DEG_id_tag_update((ID *)ob->data, 0); + } + else { + /* Flush changes through DEG. */ + DEG_id_tag_update((ID *)ob->data, ID_RECALC_COPY_ON_WRITE); + } +} + +static void vpaint_stroke_update_step(bContext *C, + wmOperator *UNUSED(op), + struct PaintStroke *stroke, + PointerRNA *itemptr) +{ + VPaintDataBase *vpd = static_cast<VPaintDataBase *>(paint_stroke_mode_data(stroke)); + + if (vpd->domain == ATTR_DOMAIN_POINT) { + if (vpd->type == CD_PROP_COLOR) { + vpaint_stroke_update_step_intern<ColorPaint4f, FloatTraits, ATTR_DOMAIN_POINT>( + C, stroke, itemptr); + } + else if (vpd->type == CD_PROP_BYTE_COLOR) { + vpaint_stroke_update_step_intern<ColorPaint4b, ByteTraits, ATTR_DOMAIN_POINT>( + C, stroke, itemptr); + } + } + else if (vpd->domain == ATTR_DOMAIN_CORNER) { + if (vpd->type == CD_PROP_COLOR) { + vpaint_stroke_update_step_intern<ColorPaint4f, FloatTraits, ATTR_DOMAIN_CORNER>( + C, stroke, itemptr); + } + else if (vpd->type == CD_PROP_BYTE_COLOR) { + vpaint_stroke_update_step_intern<ColorPaint4b, ByteTraits, ATTR_DOMAIN_CORNER>( + C, stroke, itemptr); + } + } +} + +template<typename Color, typename Traits, AttributeDomain domain> +static void vpaint_free_vpaintdata(Object *ob, void *_vpd) +{ + VPaintData<Color, Traits, domain> *vpd = static_cast<VPaintData<Color, Traits, domain> *>(_vpd); + + if (vpd->is_texbrush) { + ED_vpaint_proj_handle_free(vpd->vp_handle); + } + + if (vpd->mlooptag) { + MEM_freeN(vpd->mlooptag); + } + if (vpd->smear.color_prev) { + MEM_freeN(vpd->smear.color_prev); + } + if (vpd->smear.color_curr) { + MEM_freeN(vpd->smear.color_curr); + } + + MEM_delete<VPaintData<Color, Traits, domain>>(vpd); +} + +static ViewContext *vpaint_get_viewcontext(Object *ob, void *vpd_ptr) +{ + VPaintDataBase *vpd = static_cast<VPaintDataBase *>(vpd_ptr); + + return &vpd->vc; +} + +static void vpaint_stroke_done(const bContext *C, struct PaintStroke *stroke) +{ + void *vpd_ptr = paint_stroke_mode_data(stroke); + VPaintDataBase *vpd = static_cast<VPaintDataBase *>(vpd_ptr); + + ViewContext *vc = &vpd->vc; + Object *ob = vc->obact; + + if (vpd->domain == ATTR_DOMAIN_POINT) { + if (vpd->type == CD_PROP_COLOR) { + vpaint_free_vpaintdata<ColorPaint4f, FloatTraits, ATTR_DOMAIN_POINT>(ob, vpd); + } + else if (vpd->type == CD_PROP_BYTE_COLOR) { + vpaint_free_vpaintdata<ColorPaint4b, ByteTraits, ATTR_DOMAIN_POINT>(ob, vpd); + } + } + else if (vpd->domain == ATTR_DOMAIN_CORNER) { + if (vpd->type == CD_PROP_COLOR) { + vpaint_free_vpaintdata<ColorPaint4f, FloatTraits, ATTR_DOMAIN_CORNER>(ob, vpd); + } + else if (vpd->type == CD_PROP_BYTE_COLOR) { + vpaint_free_vpaintdata<ColorPaint4b, ByteTraits, ATTR_DOMAIN_CORNER>(ob, vpd); + } + } + + SculptSession *ss = ob->sculpt; + + if (ss->cache->alt_smooth) { + ToolSettings *ts = CTX_data_tool_settings(C); + VPaint *vp = ts->vpaint; + smooth_brush_toggle_off(C, &vp->paint, ss->cache); + } + + WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, ob); + + SCULPT_undo_push_end(ob); + + SCULPT_cache_free(ob->sculpt->cache); + ob->sculpt->cache = NULL; +} + +static int vpaint_invoke(bContext *C, wmOperator *op, const wmEvent *event) +{ + int retval; + + op->customdata = paint_stroke_new(C, + op, + SCULPT_stroke_get_location, + vpaint_stroke_test_start, + vpaint_stroke_update_step, + NULL, + vpaint_stroke_done, + event->type); + + Object *ob = CTX_data_active_object(C); + + if (SCULPT_has_loop_colors(ob) && ob->sculpt->pbvh) { + BKE_pbvh_ensure_node_loops(ob->sculpt->pbvh); + } + + SCULPT_undo_push_begin(ob, "Vertex Paint"); + + if ((retval = op->type->modal(C, op, event)) == OPERATOR_FINISHED) { + paint_stroke_free(C, op, (PaintStroke *)op->customdata); + return OPERATOR_FINISHED; + } + + /* add modal handler */ + WM_event_add_modal_handler(C, op); + + OPERATOR_RETVAL_CHECK(retval); + BLI_assert(retval == OPERATOR_RUNNING_MODAL); + + return OPERATOR_RUNNING_MODAL; +} + +static int vpaint_exec(bContext *C, wmOperator *op) +{ + op->customdata = paint_stroke_new(C, + op, + SCULPT_stroke_get_location, + vpaint_stroke_test_start, + vpaint_stroke_update_step, + NULL, + vpaint_stroke_done, + 0); + + /* frees op->customdata */ + paint_stroke_exec(C, op, (PaintStroke *)op->customdata); + + return OPERATOR_FINISHED; +} + +static void vpaint_cancel(bContext *C, wmOperator *op) +{ + Object *ob = CTX_data_active_object(C); + if (ob->sculpt->cache) { + SCULPT_cache_free(ob->sculpt->cache); + ob->sculpt->cache = NULL; + } + + paint_stroke_cancel(C, op, (PaintStroke *)op->customdata); +} + +static int vpaint_modal(bContext *C, wmOperator *op, const wmEvent *event) +{ + return paint_stroke_modal(C, op, event, (struct PaintStroke **)&op->customdata); +} + +void PAINT_OT_vertex_paint(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Vertex Paint"; + ot->idname = "PAINT_OT_vertex_paint"; + ot->description = "Paint a stroke in the active color attribute layer"; + + /* api callbacks */ + ot->invoke = vpaint_invoke; + ot->modal = vpaint_modal; + ot->exec = vpaint_exec; + ot->poll = vertex_paint_poll; + ot->cancel = vpaint_cancel; + + /* flags */ + ot->flag = OPTYPE_UNDO | OPTYPE_BLOCKING; + + paint_stroke_operator_properties(ot); +} + +/* -------------------------------------------------------------------- */ +/** \name Set Vertex Colors Operator + * \{ */ + +template<typename Color, typename Traits, AttributeDomain domain> +static bool vertex_color_set(Object *ob, ColorPaint4f paintcol_in, Color *color_layer) +{ + Mesh *me; + if (((me = BKE_mesh_from_object(ob)) == NULL) || (ED_mesh_color_ensure(me, NULL) == false)) { + return false; + } + + Color paintcol = fromFloat<Color>(paintcol_in); + + const bool use_face_sel = (me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0; + const bool use_vert_sel = (me->editflag & ME_EDIT_PAINT_VERT_SEL) != 0; + + const MPoly *mp = me->mpoly; + for (int i = 0; i < me->totpoly; i++, mp++) { + if (use_face_sel && !(mp->flag & ME_FACE_SEL)) { + continue; + } + + int j = 0; + do { + uint vidx = me->mloop[mp->loopstart + j].v; + + if (!(use_vert_sel && !(me->mvert[vidx].flag & SELECT))) { + if constexpr (domain == ATTR_DOMAIN_CORNER) { + color_layer[mp->loopstart + j] = paintcol; + } + else { + color_layer[vidx] = paintcol; + } + } + j++; + } while (j < mp->totloop); + } + + /* remove stale me->mcol, will be added later */ + BKE_mesh_tessface_clear(me); + + DEG_id_tag_update(&me->id, ID_RECALC_COPY_ON_WRITE); + + /* NOTE: Original mesh is used for display, so tag it directly here. */ + BKE_mesh_batch_cache_dirty_tag(me, BKE_MESH_BATCH_DIRTY_ALL); + + return true; +} + +static int vertex_color_set_exec(bContext *C, wmOperator *UNUSED(op)) +{ + Scene *scene = CTX_data_scene(C); + Object *obact = CTX_data_active_object(C); + Mesh *me = BKE_object_get_original_mesh(obact); + + // uint paintcol = vpaint_get_current_color(scene, scene->toolsettings->vpaint, false); + ColorPaint4f paintcol = vpaint_get_current_col<ColorPaint4f, FloatTraits, ATTR_DOMAIN_POINT>( + scene, scene->toolsettings->vpaint, false); + + bool ok = false; + + CustomDataLayer *layer = BKE_id_attributes_active_color_get(&me->id); + AttributeDomain domain = BKE_id_attribute_domain(&me->id, layer); + + if (domain == ATTR_DOMAIN_POINT) { + if (layer->type == CD_PROP_COLOR) { + ok = vertex_color_set<ColorPaint4f, FloatTraits, ATTR_DOMAIN_POINT>( + obact, paintcol, static_cast<ColorPaint4f *>(layer->data)); + } + else if (layer->type == CD_PROP_BYTE_COLOR) { + ok = vertex_color_set<ColorPaint4b, ByteTraits, ATTR_DOMAIN_POINT>( + obact, paintcol, static_cast<ColorPaint4b *>(layer->data)); + } + } + else { + if (layer->type == CD_PROP_COLOR) { + ok = vertex_color_set<ColorPaint4f, FloatTraits, ATTR_DOMAIN_CORNER>( + obact, paintcol, static_cast<ColorPaint4f *>(layer->data)); + } + else if (layer->type == CD_PROP_BYTE_COLOR) { + ok = vertex_color_set<ColorPaint4b, ByteTraits, ATTR_DOMAIN_CORNER>( + obact, paintcol, static_cast<ColorPaint4b *>(layer->data)); + } + } + + if (ok) { + WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, obact); + return OPERATOR_FINISHED; + } + return OPERATOR_CANCELLED; +} + +void PAINT_OT_vertex_color_set(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Set Vertex Colors"; + ot->idname = "PAINT_OT_vertex_color_set"; + ot->description = "Fill the active vertex color layer with the current paint color"; + + /* api callbacks */ + ot->exec = vertex_color_set_exec; + ot->poll = vertex_paint_mode_poll; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; +} + +/** \} */ |