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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2005 by the Blender Foundation.
* All rights reserved.
*
* Contributor(s): Daniel Dunbar
* Ton Roosendaal,
* Ben Batt,
* Brecht Van Lommel,
* Campbell Barton
*
* ***** END GPL LICENSE BLOCK *****
*
*/
/** \file blender/modifiers/intern/MOD_bevel.c
* \ingroup modifiers
*/
#include "MEM_guardedalloc.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "BLI_utildefines.h"
#include "BLI_linklist_stack.h"
#include "BLI_math.h"
#include "BLI_string.h"
#include "BKE_deform.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "MOD_util.h"
#include "bmesh.h"
#include "bmesh_tools.h"
#include "DEG_depsgraph_query.h"
static void initData(ModifierData *md)
{
BevelModifierData *bmd = (BevelModifierData *) md;
bmd->value = 0.1f;
bmd->res = 1;
bmd->flags = 0;
bmd->val_flags = MOD_BEVEL_AMT_OFFSET;
bmd->lim_flags = 0;
bmd->e_flags = 0;
bmd->edge_flags = 0;
bmd->mat = -1;
bmd->profile = 0.5f;
bmd->bevel_angle = DEG2RADF(30.0f);
bmd->defgrp_name[0] = '\0';
bmd->hnmode = MOD_BEVEL_HN_NONE;
bmd->hn_strength = 0.5f;
bmd->clnordata.faceHash = NULL;
}
static void copyData(const ModifierData *md_src, ModifierData *md_dst, const int UNUSED(flag))
{
BevelModifierData *bmd_src = (BevelModifierData *)md_src;
BevelModifierData *bmd_dst = (BevelModifierData *)md_dst;
*bmd_dst = *bmd_src;
bmd_dst->clnordata.faceHash = NULL;
}
static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
{
BevelModifierData *bmd = (BevelModifierData *)md;
CustomDataMask dataMask = 0;
/* ask for vertexgroups if we need them */
if (bmd->defgrp_name[0]) dataMask |= CD_MASK_MDEFORMVERT;
return dataMask;
}
static void bevel_set_weighted_normal_face_strength(BMesh *bm, Scene *scene)
{
BMFace *f;
BMIter fiter;
const char *wn_layer_id = MOD_WEIGHTEDNORMALS_FACEWEIGHT_CDLAYER_ID;
int cd_prop_int_idx = CustomData_get_named_layer_index(&bm->pdata, CD_PROP_INT, wn_layer_id);
if (cd_prop_int_idx == -1) {
BM_data_layer_add_named(bm, &bm->pdata, CD_PROP_INT, wn_layer_id);
cd_prop_int_idx = CustomData_get_named_layer_index(&bm->pdata, CD_PROP_INT, wn_layer_id);
}
cd_prop_int_idx -= CustomData_get_layer_index(&bm->pdata, CD_PROP_INT);
const int cd_prop_int_offset = CustomData_get_n_offset(&bm->pdata, CD_PROP_INT, cd_prop_int_idx);
const int face_strength = scene->toolsettings->face_strength;
BM_ITER_MESH(f, &fiter, bm, BM_FACES_OF_MESH) {
if (BM_elem_flag_test(f, BM_ELEM_TAG)) {
int *strength = BM_ELEM_CD_GET_VOID_P(f, cd_prop_int_offset);
*strength = face_strength;
}
}
}
static void bevel_mod_harden_normals(
BevelModifierData *bmd, BMesh *bm, const float hn_strength,
const int hnmode, MDeformVert *dvert, int vgroup)
{
if (bmd->res > 20 || bmd->value == 0)
return;
BM_mesh_normals_update(bm);
BM_lnorspace_update(bm);
BM_normals_loops_edges_tag(bm, true);
const bool vertex_only = (bmd->flags & MOD_BEVEL_VERT) != 0;
const int cd_clnors_offset = CustomData_get_offset(&bm->ldata, CD_CUSTOMLOOPNORMAL);
const bool do_normal_to_recon = (hn_strength == 1.0f);
BMFace *f;
BMLoop *l, *l_cur, *l_first;
BMIter fiter;
GHash *faceHash = bmd->clnordata.faceHash;
/* Iterate throught all loops of a face */
BM_ITER_MESH(f, &fiter, bm, BM_FACES_OF_MESH) {
l_cur = l_first = BM_FACE_FIRST_LOOP(f);
do {
if ((!BM_elem_flag_test(l_cur->e, BM_ELEM_TAG)) ||
(!BM_elem_flag_test(l_cur, BM_ELEM_TAG) && BM_loop_check_cyclic_smooth_fan(l_cur)))
{
/* previous and next edge is sharp, accumulate face normals into loop */
if (!BM_elem_flag_test(l_cur->e, BM_ELEM_TAG) && !BM_elem_flag_test(l_cur->prev->e, BM_ELEM_TAG)) {
const int loop_index = BM_elem_index_get(l_cur);
short *clnors = BM_ELEM_CD_GET_VOID_P(l_cur, cd_clnors_offset);
BKE_lnor_space_custom_normal_to_data(bm->lnor_spacearr->lspacearr[loop_index], f->no, clnors);
}
else {
BMVert *v_pivot = l_cur->v;
BMEdge *e_next;
const BMEdge *e_org = l_cur->e;
BMLoop *lfan_pivot, *lfan_pivot_next;
UNUSED_VARS_NDEBUG(v_pivot);
lfan_pivot = l_cur;
e_next = lfan_pivot->e;
BLI_SMALLSTACK_DECLARE(loops, BMLoop *);
float cn_wght[3] = { 0.0f, 0.0f, 0.0f };
int recon_face_count = 0; /* Counts number of reconstructed faces current vert is connected to */
BMFace *recon_face = NULL; /* Reconstructed face */
while (true) {
lfan_pivot_next = BM_vert_step_fan_loop(lfan_pivot, &e_next);
if (lfan_pivot_next) {
BLI_assert(lfan_pivot_next->v == v_pivot);
}
else {
e_next = (lfan_pivot->e == e_next) ? lfan_pivot->prev->e : lfan_pivot->e;
}
BLI_SMALLSTACK_PUSH(loops, lfan_pivot);
if (bmd->lim_flags & MOD_BEVEL_WEIGHT) {
int weight = BM_elem_float_data_get(&bm->edata, lfan_pivot->f, CD_BWEIGHT);
if (weight) {
if (hnmode == MOD_BEVEL_HN_FACE) {
float cur[3]; //Add area weighted face normals
mul_v3_v3fl(cur, lfan_pivot->f->no, BM_face_calc_area(lfan_pivot->f));
add_v3_v3(cn_wght, cur);
}
else
add_v3_v3(cn_wght, lfan_pivot->f->no); //Else simply add face normals
}
else
add_v3_v3(cn_wght, lfan_pivot->f->no);
}
else if (bmd->lim_flags & MOD_BEVEL_VGROUP) {
const bool has_vgroup = dvert != NULL;
const bool vert_of_group = (
has_vgroup &&
(defvert_find_index(&dvert[BM_elem_index_get(l->v)], vgroup) != NULL));
if (vert_of_group && hnmode == MOD_BEVEL_HN_FACE) {
float cur[3];
mul_v3_v3fl(cur, lfan_pivot->f->no, BM_face_calc_area(lfan_pivot->f));
add_v3_v3(cn_wght, cur);
}
else
add_v3_v3(cn_wght, lfan_pivot->f->no);
}
else {
float cur[3];
mul_v3_v3fl(cur, lfan_pivot->f->no, BM_face_calc_area(lfan_pivot->f));
add_v3_v3(cn_wght, cur);
}
if (!BLI_ghash_haskey(faceHash, lfan_pivot->f)) {
recon_face = f;
recon_face_count++;
}
if (!BM_elem_flag_test(e_next, BM_ELEM_TAG) || (e_next == e_org)) {
break;
}
lfan_pivot = lfan_pivot_next;
}
normalize_v3(cn_wght);
mul_v3_fl(cn_wght, hn_strength);
float n_final[3];
while ((l = BLI_SMALLSTACK_POP(loops))) {
const int l_index = BM_elem_index_get(l);
short *clnors = BM_ELEM_CD_GET_VOID_P(l, cd_clnors_offset);
/* If vertex is edge vert with 1 reconnected face */
if (recon_face_count == 1 || (recon_face != NULL && do_normal_to_recon)) {
BKE_lnor_space_custom_normal_to_data(
bm->lnor_spacearr->lspacearr[l_index], recon_face->no, clnors);
}
else if (vertex_only == false || recon_face_count == 0) {
copy_v3_v3(n_final, l->f->no);
mul_v3_fl(n_final, 1.0f - hn_strength);
add_v3_v3(n_final, cn_wght);
normalize_v3(n_final);
BKE_lnor_space_custom_normal_to_data(
bm->lnor_spacearr->lspacearr[l_index], n_final, clnors);
}
else if (BLI_ghash_haskey(faceHash, l->f)) {
BKE_lnor_space_custom_normal_to_data(
bm->lnor_spacearr->lspacearr[l_index], l->v->no, clnors);
}
}
}
}
} while ((l_cur = l_cur->next) != l_first);
}
}
static void bevel_fix_normal_shading_continuity(BevelModifierData *bmd, BMesh *bm)
{
const bool vertex_only = (bmd->flags & MOD_BEVEL_VERT) != 0;
if (bmd->value == 0 || (bmd->clnordata.faceHash == NULL && vertex_only))
return;
BM_mesh_normals_update(bm);
BM_lnorspace_update(bm);
GHash *faceHash = bmd->clnordata.faceHash;
BMEdge *e;
BMLoop *l;
BMIter liter, eiter;
const int cd_clnors_offset = CustomData_get_offset(&bm->ldata, CD_CUSTOMLOOPNORMAL);
const float hn_strength = bmd->hn_strength;
float ref = 10.0f;
BM_ITER_MESH(e, &eiter, bm, BM_EDGES_OF_MESH) {
BMFace *f_a, *f_b;
BM_edge_face_pair(e, &f_a, &f_b);
bool has_f_a = false, has_f_b = false;
if (f_a)
has_f_a = BLI_ghash_haskey(faceHash, f_a);
if (f_b)
has_f_b = BLI_ghash_haskey(faceHash, f_b);
if (has_f_a ^ has_f_b) {
/* If one of both faces is present in faceHash then we are at a border
* between new vmesh created and reconstructed face */
for (int i = 0; i < 2; i++) {
BMVert *v = (i == 0) ? e->v1 : e->v2;
BM_ITER_ELEM(l, &liter, v, BM_LOOPS_OF_VERT) {
if (l->f == f_a || l->f == f_b) {
const int l_index = BM_elem_index_get(l);
short *clnors = BM_ELEM_CD_GET_VOID_P(l, cd_clnors_offset);
float n_final[3], pow_a[3], pow_b[3];
zero_v3(n_final);
copy_v3_v3(pow_a, f_a->no);
copy_v3_v3(pow_b, f_b->no);
if (has_f_a) {
mul_v3_fl(pow_a, bmd->res / ref);
mul_v3_fl(pow_b, ref / bmd->res);
}
else {
mul_v3_fl(pow_b, bmd->res / ref);
mul_v3_fl(pow_a, ref / bmd->res);
}
add_v3_v3(n_final, pow_a);
add_v3_v3(n_final, pow_b);
normalize_v3(n_final);
BKE_lnor_space_custom_normal_to_data(bm->lnor_spacearr->lspacearr[l_index], n_final, clnors);
}
}
}
}
else if (has_f_a == true && has_f_b == true) {
/* Else if both faces are present we assign clnor corresponding
* to vert normal and face normal */
for (int i = 0; i < 2; i++) {
BMVert *v = (i == 0) ? e->v1 : e->v2;
BM_ITER_ELEM(l, &liter, v, BM_LOOPS_OF_VERT) {
if (l->f == f_a || l->f == f_b) {
const int l_index = BM_elem_index_get(l);
short *clnors = BM_ELEM_CD_GET_VOID_P(l, cd_clnors_offset);
float n_final[3], cn_wght[3];
copy_v3_v3(n_final, v->no);
mul_v3_fl(n_final, hn_strength);
copy_v3_v3(cn_wght, l->f->no);
mul_v3_fl(cn_wght, 1.0f - hn_strength);
add_v3_v3(n_final, cn_wght);
normalize_v3(n_final);
BKE_lnor_space_custom_normal_to_data(bm->lnor_spacearr->lspacearr[l_index], n_final, clnors);
}
}
}
}
}
}
/*
* This calls the new bevel code (added since 2.64)
*/
static Mesh *applyModifier(ModifierData *md, const ModifierEvalContext *ctx, Mesh *mesh)
{
Mesh *result;
BMesh *bm;
BMIter iter;
BMEdge *e;
BMVert *v;
float weight, weight2;
int vgroup = -1;
MDeformVert *dvert = NULL;
BevelModifierData *bmd = (BevelModifierData *) md;
const float threshold = cosf(bmd->bevel_angle + 0.000000175f);
const bool vertex_only = (bmd->flags & MOD_BEVEL_VERT) != 0;
const bool do_clamp = !(bmd->flags & MOD_BEVEL_OVERLAP_OK);
const int offset_type = bmd->val_flags;
const int mat = CLAMPIS(bmd->mat, -1, ctx->object->totcol - 1);
const bool loop_slide = (bmd->flags & MOD_BEVEL_EVEN_WIDTHS) == 0;
const bool mark_seam = (bmd->edge_flags & MOD_BEVEL_MARK_SEAM);
const bool mark_sharp = (bmd->edge_flags & MOD_BEVEL_MARK_SHARP);
const bool set_wn_strength = (bmd->flags & MOD_BEVEL_SET_WN_STR);
struct Scene *scene = DEG_get_evaluated_scene(ctx->depsgraph);
bm = BKE_mesh_to_bmesh_ex(
mesh,
&(struct BMeshCreateParams){0},
&(struct BMeshFromMeshParams){
.calc_face_normal = true,
.add_key_index = false,
.use_shapekey = true,
.active_shapekey = ctx->object->shapenr,
});
if ((bmd->lim_flags & MOD_BEVEL_VGROUP) && bmd->defgrp_name[0])
MOD_get_vgroup(ctx->object, mesh, bmd->defgrp_name, &dvert, &vgroup);
if (vertex_only) {
BM_ITER_MESH (v, &iter, bm, BM_VERTS_OF_MESH) {
if (!BM_vert_is_manifold(v))
continue;
if (bmd->lim_flags & MOD_BEVEL_WEIGHT) {
weight = BM_elem_float_data_get(&bm->vdata, v, CD_BWEIGHT);
if (weight == 0.0f)
continue;
}
else if (vgroup != -1) {
weight = defvert_array_find_weight_safe(dvert, BM_elem_index_get(v), vgroup);
/* Check is against 0.5 rather than != 0.0 because cascaded bevel modifiers will
* interpolate weights for newly created vertices, and may cause unexpected "selection" */
if (weight < 0.5f)
continue;
}
BM_elem_flag_enable(v, BM_ELEM_TAG);
}
}
else if (bmd->lim_flags & MOD_BEVEL_ANGLE) {
BM_ITER_MESH (e, &iter, bm, BM_EDGES_OF_MESH) {
/* check for 1 edge having 2 face users */
BMLoop *l_a, *l_b;
if (BM_edge_loop_pair(e, &l_a, &l_b)) {
if (dot_v3v3(l_a->f->no, l_b->f->no) < threshold) {
BM_elem_flag_enable(e, BM_ELEM_TAG);
BM_elem_flag_enable(e->v1, BM_ELEM_TAG);
BM_elem_flag_enable(e->v2, BM_ELEM_TAG);
}
}
}
}
else {
/* crummy, is there a way just to operator on all? - campbell */
BM_ITER_MESH (e, &iter, bm, BM_EDGES_OF_MESH) {
if (BM_edge_is_manifold(e)) {
if (bmd->lim_flags & MOD_BEVEL_WEIGHT) {
weight = BM_elem_float_data_get(&bm->edata, e, CD_BWEIGHT);
if (weight == 0.0f)
continue;
}
else if (vgroup != -1) {
weight = defvert_array_find_weight_safe(dvert, BM_elem_index_get(e->v1), vgroup);
weight2 = defvert_array_find_weight_safe(dvert, BM_elem_index_get(e->v2), vgroup);
if (weight < 0.5f || weight2 < 0.5f)
continue;
}
BM_elem_flag_enable(e, BM_ELEM_TAG);
BM_elem_flag_enable(e->v1, BM_ELEM_TAG);
BM_elem_flag_enable(e->v2, BM_ELEM_TAG);
}
}
}
BM_mesh_bevel(bm, bmd->value, offset_type, bmd->res, bmd->profile,
vertex_only, bmd->lim_flags & MOD_BEVEL_WEIGHT, do_clamp,
dvert, vgroup, mat, loop_slide, mark_seam, mark_sharp, bmd->hnmode, &bmd->clnordata);
if (bmd->hnmode != BEVEL_HN_FIX_SHA && bmd->hnmode != MOD_BEVEL_HN_NONE) {
bevel_mod_harden_normals(bmd, bm, bmd->hn_strength, bmd->hnmode, dvert, vgroup);
}
if (bmd->hnmode == BEVEL_HN_FIX_SHA)
bevel_fix_normal_shading_continuity(bmd, bm);
if (set_wn_strength)
bevel_set_weighted_normal_face_strength(bm, scene);
result = BKE_bmesh_to_mesh_nomain(bm, &(struct BMeshToMeshParams){0});
BLI_assert(bm->vtoolflagpool == NULL &&
bm->etoolflagpool == NULL &&
bm->ftoolflagpool == NULL); /* make sure we never alloc'd these */
BM_mesh_free(bm);
if (bmd->clnordata.faceHash)
BLI_ghash_free(bmd->clnordata.faceHash, NULL, NULL);
result->runtime.cd_dirty_vert |= CD_MASK_NORMAL;
return result;
}
static bool dependsOnNormals(ModifierData *UNUSED(md))
{
return true;
}
ModifierTypeInfo modifierType_Bevel = {
/* name */ "Bevel",
/* structName */ "BevelModifierData",
/* structSize */ sizeof(BevelModifierData),
/* type */ eModifierTypeType_Constructive,
/* flags */ eModifierTypeFlag_AcceptsMesh |
eModifierTypeFlag_SupportsEditmode |
eModifierTypeFlag_EnableInEditmode |
eModifierTypeFlag_AcceptsCVs,
/* copyData */ copyData,
/* deformVerts_DM */ NULL,
/* deformMatrices_DM */ NULL,
/* deformVertsEM_DM */ NULL,
/* deformMatricesEM_DM*/NULL,
/* applyModifier_DM */ NULL,
/* applyModifierEM_DM */NULL,
/* deformVerts */ NULL,
/* deformMatrices */ NULL,
/* deformVertsEM */ NULL,
/* deformMatricesEM */ NULL,
/* applyModifier */ applyModifier,
/* applyModifierEM */ NULL,
/* initData */ initData,
/* requiredDataMask */ requiredDataMask,
/* freeData */ NULL,
/* isDisabled */ NULL,
/* updateDepsgraph */ NULL,
/* dependsOnTime */ NULL,
/* dependsOnNormals */ dependsOnNormals,
/* foreachObjectLink */ NULL,
/* foreachIDLink */ NULL,
/* foreachTexLink */ NULL,
};
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