diff options
Diffstat (limited to 'source/blender/editors/space_view3d/drawstrands.c')
| -rw-r--r-- | source/blender/editors/space_view3d/drawstrands.c | 520 |
1 files changed, 520 insertions, 0 deletions
diff --git a/source/blender/editors/space_view3d/drawstrands.c b/source/blender/editors/space_view3d/drawstrands.c new file mode 100644 index 00000000000..af2e04ee3a7 --- /dev/null +++ b/source/blender/editors/space_view3d/drawstrands.c @@ -0,0 +1,520 @@ +/* + * ***** 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) 2014 by the Blender Foundation. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): Lukas Toenne + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/editors/space_view3d/drawstrands.c + * \ingroup spview3d + */ + +#include "MEM_guardedalloc.h" + +#include "BLI_blenlib.h" +#include "BLI_utildefines.h" +#include "BLI_math.h" + +#include "DNA_object_types.h" +#include "DNA_scene_types.h" +#include "DNA_screen_types.h" +#include "DNA_view3d_types.h" + +#include "BKE_editstrands.h" +#include "BKE_global.h" +#include "BKE_main.h" +#include "BKE_strands.h" + +#include "bmesh.h" + +#include "ED_screen.h" +#include "ED_types.h" + +#include "UI_resources.h" +#include "UI_interface_icons.h" + +#include "BIF_gl.h" +#include "BIF_glutil.h" + +#include "GPU_draw.h" +#include "GPU_extensions.h" +#include "GPU_select.h" + +#include "view3d_intern.h" + +typedef struct StrandsDrawGLState { + GLint polygonmode[2]; +} StrandsDrawGLState; + +typedef enum StrandsShadeMode { + STRANDS_SHADE_FLAT, + STRANDS_SHADE_HAIR, +} StrandsShadeMode; + +static void draw_strands_begin(StrandsDrawGLState *state, short dflag) +{ + glGetIntegerv(GL_POLYGON_MODE, state->polygonmode); + glEnableClientState(GL_VERTEX_ARRAY); + + /* setup gl flags */ + glEnableClientState(GL_NORMAL_ARRAY); + + if ((dflag & DRAW_CONSTCOLOR) == 0) { +// if (part->draw_col == PART_DRAW_COL_MAT) +// glEnableClientState(GL_COLOR_ARRAY); + } + + glColor3f(1,1,1); + glEnable(GL_LIGHTING); +// glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE); +// glEnable(GL_COLOR_MATERIAL); +} + +static void draw_strands_end(StrandsDrawGLState *state) +{ + /* restore & clean up */ +// if (part->draw_col == PART_DRAW_COL_MAT) +// glDisableClientState(GL_COLOR_ARRAY); + glDisable(GL_LIGHTING); + glDisable(GL_COLOR_MATERIAL); + + glLineWidth(1.0f); + + glDisableClientState(GL_VERTEX_ARRAY); + glDisableClientState(GL_NORMAL_ARRAY); + + glPolygonMode(GL_FRONT, state->polygonmode[0]); + glPolygonMode(GL_BACK, state->polygonmode[1]); +} + +static void draw_strand_lines(Strands *strands, short dflag) +{ + const bool has_motion_state = strands->state; + StrandsDrawGLState gl_state; + StrandIterator it_strand; + + draw_strands_begin(&gl_state, dflag); + + for (BKE_strand_iter_init(&it_strand, strands); BKE_strand_iter_valid(&it_strand); BKE_strand_iter_next(&it_strand)) { + if (it_strand.tot <= 0) + continue; + + if (has_motion_state) { + glVertexPointer(3, GL_FLOAT, sizeof(StrandsMotionState), it_strand.state->co); + glNormalPointer(GL_FLOAT, sizeof(StrandsMotionState), it_strand.state->nor); + } + else { + glVertexPointer(3, GL_FLOAT, sizeof(StrandsVertex), it_strand.verts->co); + glNormalPointer(GL_FLOAT, sizeof(StrandsVertex), it_strand.verts->nor); + } + if ((dflag & DRAW_CONSTCOLOR) == 0) { +// if (part->draw_col == PART_DRAW_COL_MAT) { +// glColorPointer(3, GL_FLOAT, sizeof(ParticleCacheKey), path->col); +// } + } + + glDrawArrays(GL_LINE_STRIP, 0, it_strand.curve->numverts); + } + + draw_strands_end(&gl_state); +} + +static void draw_strand_child_lines(StrandsChildren *children, short dflag) +{ + StrandsDrawGLState gl_state; + StrandChildIterator it_strand; + + draw_strands_begin(&gl_state, dflag); + + for (BKE_strand_child_iter_init(&it_strand, children); BKE_strand_child_iter_valid(&it_strand); BKE_strand_child_iter_next(&it_strand)) { + StrandsChildCurve *curve = it_strand.curve; + const int numverts = curve->cutoff < 0.0f ? curve->numverts : min_ii(curve->numverts, (int)ceilf(curve->cutoff) + 1); + + if (it_strand.tot <= 0) + continue; + + glVertexPointer(3, GL_FLOAT, sizeof(StrandsChildVertex), it_strand.verts->co); + glNormalPointer(GL_FLOAT, sizeof(StrandsChildVertex), it_strand.verts->nor); + + if ((dflag & DRAW_CONSTCOLOR) == 0) { +// if (part->draw_col == PART_DRAW_COL_MAT) { +// glColorPointer(3, GL_FLOAT, sizeof(ParticleCacheKey), path->col); +// } + } + + + glDrawArrays(GL_LINE_STRIP, 0, numverts); + } + + draw_strands_end(&gl_state); +} + +void draw_strands(Scene *UNUSED(scene), View3D *UNUSED(v3d), ARegion *ar, Object *ob, Strands *strands, StrandsChildren *children, short dflag) +{ + RegionView3D *rv3d = ar->regiondata; + float imat[4][4]; + + invert_m4_m4(imat, rv3d->viewmatob); + +// glDepthMask(GL_FALSE); +// glEnable(GL_BLEND); + + glPushMatrix(); + + glLoadMatrixf(rv3d->viewmat); + glMultMatrixf(ob->obmat); + + if (children) + draw_strand_child_lines(children, dflag); + else + draw_strand_lines(strands, dflag); + + glPopMatrix(); + +// glDepthMask(GL_TRUE); +// glDisable(GL_BLEND); +} + +/* ------------------------------------------------------------------------- */ + +typedef struct StrandsDrawInfo { + bool has_zbuf; + bool use_zbuf_select; + + StrandsShadeMode shade_mode; + int select_mode; + + float col_base[4]; + float col_select[4]; +} StrandsDrawInfo; + +BLI_INLINE bool strands_use_normals(const StrandsDrawInfo *info) +{ + return ELEM(info->shade_mode, STRANDS_SHADE_HAIR); +} + +static void init_draw_info(StrandsDrawInfo *info, View3D *v3d, + StrandsShadeMode shade_mode, int select_mode) +{ + info->has_zbuf = v3d->zbuf; + info->use_zbuf_select = (v3d->flag & V3D_ZBUF_SELECT); + + info->shade_mode = shade_mode; + info->select_mode = select_mode; + + /* get selection theme colors */ + UI_GetThemeColor4fv(TH_VERTEX, info->col_base); + UI_GetThemeColor4fv(TH_VERTEX_SELECT, info->col_select); +} + +static void set_opengl_state_strands(const StrandsDrawInfo *info) +{ + if (!info->use_zbuf_select) + glDisable(GL_DEPTH_TEST); + glEnable(GL_BLEND); + + if (ELEM(info->shade_mode, STRANDS_SHADE_HAIR)) { + glEnable(GL_LIGHTING); + glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE); + glEnable(GL_COLOR_MATERIAL); + glShadeModel(GL_SMOOTH); + } + else { + glDisable(GL_LIGHTING); + } + + glEnableClientState(GL_VERTEX_ARRAY); + if (strands_use_normals(info)) + glEnableClientState(GL_NORMAL_ARRAY); +} + +static void set_opengl_state_dots(const StrandsDrawInfo *info) +{ + if (!info->use_zbuf_select) + glDisable(GL_DEPTH_TEST); + glEnable(GL_BLEND); + + glDisable(GL_LIGHTING); + + glEnableClientState(GL_VERTEX_ARRAY); + glPointSize(3.0); +} + +static void restore_opengl_state(const StrandsDrawInfo *info) +{ + glDisableClientState(GL_NORMAL_ARRAY); + glDisableClientState(GL_VERTEX_ARRAY); + + glDisable(GL_BLEND); + glDisable(GL_LIGHTING); + glDisable(GL_COLOR_MATERIAL); + glShadeModel(GL_FLAT); + if (info->has_zbuf) + glEnable(GL_DEPTH_TEST); + glLineWidth(1.0f); + glPointSize(1.0); +} + +/* ------------------------------------------------------------------------- */ +/* strands */ + +static void setup_gpu_buffers_strands(BMEditStrands *edit, const StrandsDrawInfo *info) +{ + const size_t size_v3 = sizeof(float) * 3; + const size_t size_vertex = (strands_use_normals(info) ? 2*size_v3 : size_v3); + +// int totstrands = BM_strands_count(edit->bm); + int totvert = edit->bm->totvert; + int totedge = edit->bm->totedge; + + if (!edit->vertex_glbuf) + glGenBuffers(1, &edit->vertex_glbuf); + if (!edit->elem_glbuf) + glGenBuffers(1, &edit->elem_glbuf); + + glBindBuffer(GL_ARRAY_BUFFER, edit->vertex_glbuf); + glBufferData(GL_ARRAY_BUFFER, size_vertex * totvert, NULL, GL_DYNAMIC_DRAW); + + glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, edit->elem_glbuf); + glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(unsigned int) * totedge * 2, NULL, GL_DYNAMIC_DRAW); + + glVertexPointer(3, GL_FLOAT, size_vertex, NULL); + if (strands_use_normals(info)) + glNormalPointer(GL_FLOAT, size_vertex, (GLubyte *)NULL + size_v3); +} + +static void unbind_gpu_buffers_strands(void) +{ + glBindBuffer(GL_ARRAY_BUFFER, 0); + glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0); +} + +static int write_gpu_buffers_strands(BMEditStrands *edit, const StrandsDrawInfo *info) +{ + const size_t size_v3 = sizeof(float) * 3; + const size_t size_vertex = (strands_use_normals(info) ? 2*size_v3 : size_v3); + + GLubyte *vertex_data; + unsigned int *elem_data; + BMVert *root, *v, *vprev; + BMIter iter, iter_strand; + int index, indexprev, index_edge; + int k; + + vertex_data = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY); + elem_data = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_WRITE_ONLY); + if (!vertex_data || !elem_data) + return 0; + + BM_mesh_elem_index_ensure(edit->bm, BM_VERT); + + index_edge = 0; + BM_ITER_STRANDS(root, &iter, edit->bm, BM_STRANDS_OF_MESH) { + BM_ITER_STRANDS_ELEM_INDEX(v, &iter_strand, root, BM_VERTS_OF_STRAND, k) { + size_t offset_co; + + index = BM_elem_index_get(v); + + offset_co = index * size_vertex; + copy_v3_v3((float *)(vertex_data + offset_co), v->co); + + if (k > 0) { + if (strands_use_normals(info)) { + size_t offset_nor = offset_co + size_v3; + float nor[3]; + sub_v3_v3v3(nor, v->co, vprev->co); + normalize_v3(nor); + copy_v3_v3((float *)(vertex_data + offset_nor), nor); + + if (k == 1) { + /* define root normal: same as first segment */ + size_t offset_root_nor = indexprev * size_vertex + size_v3; + copy_v3_v3((float *)(vertex_data + offset_root_nor), nor); + } + } + + { + elem_data[index_edge + 0] = indexprev; + elem_data[index_edge + 1] = index; + index_edge += 2; + } + } + + vprev = v; + indexprev = index; + } + } + + glUnmapBuffer(GL_ARRAY_BUFFER); + glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER); + + return index_edge; +} + +/* ------------------------------------------------------------------------- */ +/* dots */ + +static void setup_gpu_buffers_dots(BMEditStrands *edit, const StrandsDrawInfo *info, bool selected) +{ + const size_t size_v3 = sizeof(float) * 3; + const size_t size_vertex = size_v3; + BMesh *bm = edit->bm; + + BMVert *v; + BMIter iter; + int totvert; + + switch (info->select_mode) { + case HAIR_SELECT_STRAND: + totvert = 0; + break; + case HAIR_SELECT_VERTEX: + totvert = selected ? bm->totvertsel : bm->totvert - bm->totvertsel; + break; + case HAIR_SELECT_TIP: + totvert = 0; + BM_ITER_MESH(v, &iter, bm, BM_VERTS_OF_MESH) { + if (BM_elem_flag_test_bool(v, BM_ELEM_SELECT) != selected) + continue; + if (!BM_strands_vert_is_tip(v)) + continue; + + ++totvert; + } + break; + } + + if (totvert == 0) + return; + + if (!edit->dot_glbuf) + glGenBuffers(1, &edit->dot_glbuf); + + glBindBuffer(GL_ARRAY_BUFFER, edit->dot_glbuf); + glBufferData(GL_ARRAY_BUFFER, size_vertex * totvert, NULL, GL_DYNAMIC_DRAW); + + glVertexPointer(3, GL_FLOAT, size_vertex, NULL); +} + +static void unbind_gpu_buffers_dots(void) +{ + glBindBuffer(GL_ARRAY_BUFFER, 0); +} + +static int write_gpu_buffers_dots(BMEditStrands *edit, const StrandsDrawInfo *info, bool selected) +{ + const size_t size_v3 = sizeof(float) * 3; + const size_t size_vertex = size_v3; + + GLubyte *vertex_data; + BMVert *v; + BMIter iter; + int index_dot; + + if (info->select_mode == HAIR_SELECT_STRAND) + return 0; + + vertex_data = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY); + if (!vertex_data) + return 0; + + BM_mesh_elem_index_ensure(edit->bm, BM_VERT); + + index_dot = 0; + switch (info->select_mode) { + case HAIR_SELECT_STRAND: + /* already exited, but keep the case for the compiler */ + break; + case HAIR_SELECT_VERTEX: + BM_ITER_MESH(v, &iter, edit->bm, BM_VERTS_OF_MESH) { + size_t offset_co; + + if (BM_elem_flag_test_bool(v, BM_ELEM_SELECT) != selected) + continue; + + offset_co = index_dot * size_vertex; + copy_v3_v3((float *)(vertex_data + offset_co), v->co); + ++index_dot; + } + break; + case HAIR_SELECT_TIP: + BM_ITER_MESH(v, &iter, edit->bm, BM_VERTS_OF_MESH) { + size_t offset_co; + + if (BM_elem_flag_test_bool(v, BM_ELEM_SELECT) != selected) + continue; + if (!BM_strands_vert_is_tip(v)) + continue; + + offset_co = index_dot * size_vertex; + copy_v3_v3((float *)(vertex_data + offset_co), v->co); + ++index_dot; + } + break; + } + + glUnmapBuffer(GL_ARRAY_BUFFER); + + return index_dot; +} + +/* ------------------------------------------------------------------------- */ + +static void draw_dots(BMEditStrands *edit, const StrandsDrawInfo *info, bool selected) +{ + int totelem; + + if (selected) + glColor3fv(info->col_select); + else + glColor3fv(info->col_base); + + setup_gpu_buffers_dots(edit, info, selected); + totelem = write_gpu_buffers_dots(edit, info, selected); + if (totelem > 0) + glDrawArrays(GL_POINTS, 0, totelem); +} + +void draw_strands_edit_hair(Scene *scene, View3D *v3d, ARegion *UNUSED(ar), BMEditStrands *edit) +{ + HairEditSettings *settings = &scene->toolsettings->hair_edit; + + StrandsDrawInfo info; + int totelem; + + init_draw_info(&info, v3d, STRANDS_SHADE_HAIR, settings->select_mode); + + set_opengl_state_strands(&info); + setup_gpu_buffers_strands(edit, &info); + totelem = write_gpu_buffers_strands(edit, &info); + if (totelem > 0) + glDrawElements(GL_LINES, totelem, GL_UNSIGNED_INT, NULL); + unbind_gpu_buffers_strands(); + + set_opengl_state_dots(&info); + draw_dots(edit, &info, false); + draw_dots(edit, &info, true); + unbind_gpu_buffers_dots(); + + restore_opengl_state(&info); +} |