279 lines
8.5 KiB
C
279 lines
8.5 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2005 by the Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup modifiers
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*/
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#include <stddef.h>
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#include "MEM_guardedalloc.h"
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#include "BLI_utildefines.h"
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#include "DNA_object_types.h"
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#include "DNA_scene_types.h"
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#include "DNA_mesh_types.h"
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#include "BKE_cdderivedmesh.h"
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#include "BKE_scene.h"
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#include "BKE_subdiv.h"
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#include "BKE_subdiv_ccg.h"
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#include "BKE_subdiv_mesh.h"
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#include "BKE_subsurf.h"
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#include "DEG_depsgraph.h"
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#include "DEG_depsgraph_query.h"
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#include "MOD_modifiertypes.h"
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#include "intern/CCGSubSurf.h"
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typedef struct SubsurfRuntimeData {
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/* Cached subdivision surface descriptor, with topology and settings. */
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struct Subdiv *subdiv;
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} SubsurfRuntimeData;
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static void initData(ModifierData *md)
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{
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SubsurfModifierData *smd = (SubsurfModifierData *) md;
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smd->levels = 1;
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smd->renderLevels = 2;
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smd->uv_smooth = SUBSURF_UV_SMOOTH_PRESERVE_CORNERS;
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smd->quality = 3;
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}
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static void copyData(const ModifierData *md, ModifierData *target, const int flag)
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{
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#if 0
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const SubsurfModifierData *smd = (const SubsurfModifierData *) md;
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#endif
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SubsurfModifierData *tsmd = (SubsurfModifierData *) target;
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modifier_copyData_generic(md, target, flag);
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tsmd->emCache = tsmd->mCache = NULL;
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}
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static void freeRuntimeData(void *runtime_data_v)
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{
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if (runtime_data_v == NULL) {
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return;
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}
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SubsurfRuntimeData *runtime_data = (SubsurfRuntimeData *)runtime_data_v;
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if (runtime_data->subdiv != NULL) {
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BKE_subdiv_free(runtime_data->subdiv);
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}
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MEM_freeN(runtime_data);
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}
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static void freeData(ModifierData *md)
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{
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SubsurfModifierData *smd = (SubsurfModifierData *) md;
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if (smd->mCache) {
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ccgSubSurf_free(smd->mCache);
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smd->mCache = NULL;
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}
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if (smd->emCache) {
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ccgSubSurf_free(smd->emCache);
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smd->emCache = NULL;
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}
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freeRuntimeData(smd->modifier.runtime);
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}
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static bool isDisabled(const Scene *scene, ModifierData *md, bool useRenderParams)
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{
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SubsurfModifierData *smd = (SubsurfModifierData *) md;
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int levels = (useRenderParams) ? smd->renderLevels : smd->levels;
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return get_render_subsurf_level(&scene->r, levels, useRenderParams != 0) == 0;
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}
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static int subdiv_levels_for_modifier_get(const SubsurfModifierData *smd,
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const ModifierEvalContext *ctx)
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{
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Scene *scene = DEG_get_evaluated_scene(ctx->depsgraph);
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const bool use_render_params = (ctx->flag & MOD_APPLY_RENDER);
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const int requested_levels = (use_render_params) ? smd->renderLevels
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: smd->levels;
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return get_render_subsurf_level(&scene->r,
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requested_levels,
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use_render_params);
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}
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static void subdiv_settings_init(SubdivSettings *settings,
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const SubsurfModifierData *smd)
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{
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settings->is_simple = (smd->subdivType == SUBSURF_TYPE_SIMPLE);
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settings->is_adaptive = true;
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settings->level = settings->is_simple ? 1 : smd->quality;
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settings->vtx_boundary_interpolation = SUBDIV_VTX_BOUNDARY_EDGE_ONLY;
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settings->fvar_linear_interpolation =
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BKE_subdiv_fvar_interpolation_from_uv_smooth(smd->uv_smooth);
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}
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/* Main goal of this function is to give usable subdivision surface descriptor
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* which matches settings and topology. */
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static Subdiv *subdiv_descriptor_ensure(SubsurfModifierData *smd,
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const SubdivSettings *subdiv_settings,
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const Mesh *mesh)
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{
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SubsurfRuntimeData *runtime_data =
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(SubsurfRuntimeData *)smd->modifier.runtime;
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Subdiv *subdiv = BKE_subdiv_update_from_mesh(
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runtime_data->subdiv, subdiv_settings, mesh);
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runtime_data->subdiv = subdiv;
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return subdiv;
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}
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/* Subdivide into fully qualified mesh. */
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static void subdiv_mesh_settings_init(SubdivToMeshSettings *settings,
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const SubsurfModifierData *smd,
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const ModifierEvalContext *ctx)
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{
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const int level = subdiv_levels_for_modifier_get(smd, ctx);
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settings->resolution = (1 << level) + 1;
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settings->use_optimal_display =
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(smd->flags & eSubsurfModifierFlag_ControlEdges);
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}
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static Mesh *subdiv_as_mesh(SubsurfModifierData *smd,
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const ModifierEvalContext *ctx,
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Mesh *mesh,
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Subdiv *subdiv)
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{
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Mesh *result = mesh;
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SubdivToMeshSettings mesh_settings;
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subdiv_mesh_settings_init(&mesh_settings, smd, ctx);
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if (mesh_settings.resolution < 3) {
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return result;
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}
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result = BKE_subdiv_to_mesh(subdiv, &mesh_settings, mesh);
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return result;
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}
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/* Subdivide into CCG. */
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static void subdiv_ccg_settings_init(SubdivToCCGSettings *settings,
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const SubsurfModifierData *smd,
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const ModifierEvalContext *ctx)
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{
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const int level = subdiv_levels_for_modifier_get(smd, ctx);
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settings->resolution = (1 << level) + 1;
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settings->need_normal = true;
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settings->need_mask = false;
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}
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static Mesh *subdiv_as_ccg(SubsurfModifierData *smd,
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const ModifierEvalContext *ctx,
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Mesh *mesh,
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Subdiv *subdiv)
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{
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Mesh *result = mesh;
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SubdivToCCGSettings ccg_settings;
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subdiv_ccg_settings_init(&ccg_settings, smd, ctx);
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if (ccg_settings.resolution < 3) {
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return result;
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}
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result = BKE_subdiv_to_ccg_mesh(subdiv, &ccg_settings, mesh);
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return result;
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}
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static SubsurfRuntimeData *subsurf_ensure_runtime(SubsurfModifierData *smd)
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{
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SubsurfRuntimeData *runtime_data =
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(SubsurfRuntimeData *)smd->modifier.runtime;
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if (runtime_data == NULL) {
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runtime_data = MEM_callocN(sizeof(*runtime_data), "subsurf runtime");
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smd->modifier.runtime = runtime_data;
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}
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return runtime_data;
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}
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/* Modifier itself. */
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static Mesh *applyModifier(ModifierData *md,
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const ModifierEvalContext *ctx,
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Mesh *mesh)
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{
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Mesh *result = mesh;
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SubsurfModifierData *smd = (SubsurfModifierData *) md;
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SubdivSettings subdiv_settings;
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subdiv_settings_init(&subdiv_settings, smd);
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if (subdiv_settings.level == 0) {
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return result;
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}
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BKE_subdiv_settings_validate_for_mesh(&subdiv_settings, mesh);
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SubsurfRuntimeData *runtime_data = subsurf_ensure_runtime(smd);
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Subdiv *subdiv = subdiv_descriptor_ensure(smd, &subdiv_settings, mesh);
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if (subdiv == NULL) {
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/* Happens on bad topology, but also on empty input mesh. */
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return result;
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}
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/* TODO(sergey): Decide whether we ever want to use CCG for subsurf,
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* maybe when it is a last modifier in the stack? */
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if (true) {
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result = subdiv_as_mesh(smd, ctx, mesh, subdiv);
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}
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else {
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result = subdiv_as_ccg(smd, ctx, mesh, subdiv);
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}
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// BKE_subdiv_stats_print(&subdiv->stats);
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if (subdiv != runtime_data->subdiv) {
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BKE_subdiv_free(subdiv);
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}
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return result;
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}
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ModifierTypeInfo modifierType_Subsurf = {
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/* name */ "Subdivision",
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/* structName */ "SubsurfModifierData",
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/* structSize */ sizeof(SubsurfModifierData),
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/* type */ eModifierTypeType_Constructive,
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/* flags */ eModifierTypeFlag_AcceptsMesh |
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eModifierTypeFlag_SupportsMapping |
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eModifierTypeFlag_SupportsEditmode |
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eModifierTypeFlag_EnableInEditmode |
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eModifierTypeFlag_AcceptsCVs,
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/* copyData */ copyData,
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/* deformVerts */ NULL,
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/* deformMatrices */ NULL,
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/* deformVertsEM */ NULL,
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/* deformMatricesEM */ NULL,
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/* applyModifier */ applyModifier,
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/* initData */ initData,
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/* requiredDataMask */ NULL,
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/* freeData */ freeData,
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/* isDisabled */ isDisabled,
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/* updateDepsgraph */ NULL,
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/* dependsOnTime */ NULL,
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/* dependsOnNormals */ NULL,
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/* foreachObjectLink */ NULL,
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/* foreachIDLink */ NULL,
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/* foreachTexLink */ NULL,
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/* freeRuntimeData */ freeRuntimeData,
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};
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