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/*
* 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.
*/
/** \file
* \ingroup modifiers
*/
#include <stddef.h>
#include "MEM_guardedalloc.h"
#include "BLI_utildefines.h"
#include "DNA_mesh_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "BKE_cdderivedmesh.h"
#include "BKE_mesh.h"
#include "BKE_multires.h"
#include "BKE_modifier.h"
#include "BKE_paint.h"
#include "BKE_subdiv.h"
#include "BKE_subdiv_ccg.h"
#include "BKE_subdiv_mesh.h"
#include "BKE_subsurf.h"
#include "DEG_depsgraph_query.h"
#include "MOD_modifiertypes.h"
typedef struct MultiresRuntimeData {
/* Cached subdivision surface descriptor, with topology and settings. */
struct Subdiv *subdiv;
} MultiresRuntimeData;
static void initData(ModifierData *md)
{
MultiresModifierData *mmd = (MultiresModifierData *)md;
mmd->lvl = 0;
mmd->sculptlvl = 0;
mmd->renderlvl = 0;
mmd->totlvl = 0;
mmd->uv_smooth = SUBSURF_UV_SMOOTH_PRESERVE_CORNERS;
mmd->quality = 3;
mmd->flags |= eMultiresModifierFlag_UseCrease;
}
static void copyData(const ModifierData *md_src, ModifierData *md_dst, const int flag)
{
modifier_copyData_generic(md_src, md_dst, flag);
}
static void freeRuntimeData(void *runtime_data_v)
{
if (runtime_data_v == NULL) {
return;
}
MultiresRuntimeData *runtime_data = (MultiresRuntimeData *)runtime_data_v;
if (runtime_data->subdiv != NULL) {
BKE_subdiv_free(runtime_data->subdiv);
}
MEM_freeN(runtime_data);
}
static void freeData(ModifierData *md)
{
MultiresModifierData *mmd = (MultiresModifierData *)md;
freeRuntimeData(mmd->modifier.runtime);
}
static MultiresRuntimeData *multires_ensure_runtime(MultiresModifierData *mmd)
{
MultiresRuntimeData *runtime_data = (MultiresRuntimeData *)mmd->modifier.runtime;
if (runtime_data == NULL) {
runtime_data = MEM_callocN(sizeof(*runtime_data), "subsurf runtime");
mmd->modifier.runtime = runtime_data;
}
return runtime_data;
}
/* Main goal of this function is to give usable subdivision surface descriptor
* which matches settings and topology. */
static Subdiv *subdiv_descriptor_ensure(MultiresModifierData *mmd,
const SubdivSettings *subdiv_settings,
const Mesh *mesh)
{
MultiresRuntimeData *runtime_data = (MultiresRuntimeData *)mmd->modifier.runtime;
Subdiv *subdiv = BKE_subdiv_update_from_mesh(runtime_data->subdiv, subdiv_settings, mesh);
runtime_data->subdiv = subdiv;
return subdiv;
}
/* Subdivide into fully qualified mesh. */
static Mesh *multires_as_mesh(MultiresModifierData *mmd,
const ModifierEvalContext *ctx,
Mesh *mesh,
Subdiv *subdiv)
{
Mesh *result = mesh;
const bool use_render_params = (ctx->flag & MOD_APPLY_RENDER);
const bool ignore_simplify = (ctx->flag & MOD_APPLY_IGNORE_SIMPLIFY);
const Scene *scene = DEG_get_evaluated_scene(ctx->depsgraph);
Object *object = ctx->object;
SubdivToMeshSettings mesh_settings;
BKE_multires_subdiv_mesh_settings_init(
&mesh_settings, scene, object, mmd, use_render_params, ignore_simplify);
if (mesh_settings.resolution < 3) {
return result;
}
BKE_subdiv_displacement_attach_from_multires(subdiv, mesh, mmd);
result = BKE_subdiv_to_mesh(subdiv, &mesh_settings, mesh);
return result;
}
/* Subdivide into CCG. */
static void multires_ccg_settings_init(SubdivToCCGSettings *settings,
const MultiresModifierData *mmd,
const ModifierEvalContext *ctx,
Mesh *mesh)
{
const bool has_mask = CustomData_has_layer(&mesh->ldata, CD_GRID_PAINT_MASK);
const bool use_render_params = (ctx->flag & MOD_APPLY_RENDER);
const bool ignore_simplify = (ctx->flag & MOD_APPLY_IGNORE_SIMPLIFY);
const Scene *scene = DEG_get_evaluated_scene(ctx->depsgraph);
Object *object = ctx->object;
const int level = multires_get_level(scene, object, mmd, use_render_params, ignore_simplify);
settings->resolution = (1 << level) + 1;
settings->need_normal = true;
settings->need_mask = has_mask;
}
static Mesh *multires_as_ccg(MultiresModifierData *mmd,
const ModifierEvalContext *ctx,
Mesh *mesh,
Subdiv *subdiv)
{
Mesh *result = mesh;
SubdivToCCGSettings ccg_settings;
multires_ccg_settings_init(&ccg_settings, mmd, ctx, mesh);
if (ccg_settings.resolution < 3) {
return result;
}
BKE_subdiv_displacement_attach_from_multires(subdiv, mesh, mmd);
result = BKE_subdiv_to_ccg_mesh(subdiv, &ccg_settings, mesh);
return result;
}
static Mesh *applyModifier(ModifierData *md, const ModifierEvalContext *ctx, Mesh *mesh)
{
Mesh *result = mesh;
#if !defined(WITH_OPENSUBDIV)
modifier_setError(md, "Disabled, built without OpenSubdiv");
return result;
#endif
MultiresModifierData *mmd = (MultiresModifierData *)md;
SubdivSettings subdiv_settings;
BKE_multires_subdiv_settings_init(&subdiv_settings, mmd);
if (subdiv_settings.level == 0) {
return result;
}
BKE_subdiv_settings_validate_for_mesh(&subdiv_settings, mesh);
MultiresRuntimeData *runtime_data = multires_ensure_runtime(mmd);
Subdiv *subdiv = subdiv_descriptor_ensure(mmd, &subdiv_settings, mesh);
if (subdiv == NULL) {
/* Happens on bad topology, ut also on empty input mesh. */
return result;
}
/* NOTE: Orco needs final coordinates on CPU side, which are expected to be
* accessible via MVert. For this reason we do not evaluate multires to
* grids when orco is requested. */
const bool for_orco = (ctx->flag & MOD_APPLY_ORCO) != 0;
/* Needed when rendering or baking will in sculpt mode. */
const bool for_render = (ctx->flag & MOD_APPLY_RENDER) != 0;
if ((ctx->object->mode & OB_MODE_SCULPT) && !for_orco && !for_render) {
/* NOTE: CCG takes ownership over Subdiv. */
result = multires_as_ccg(mmd, ctx, mesh, subdiv);
result->runtime.subdiv_ccg_tot_level = mmd->totlvl;
/* TODO(sergey): Usually it is sculpt stroke's update variants which
* takes care of this, but is possible that we need this before the
* stroke: i.e. when exiting blender right after stroke is done.
* Annoying and not so much black-boxed as far as sculpting goes, and
* surely there is a better way of solving this. */
if (ctx->object->sculpt != NULL) {
SculptSession *sculpt_session = ctx->object->sculpt;
sculpt_session->subdiv_ccg = result->runtime.subdiv_ccg;
sculpt_session->multires = mmd;
sculpt_session->totvert = mesh->totvert;
sculpt_session->totpoly = mesh->totpoly;
sculpt_session->mvert = NULL;
sculpt_session->mpoly = NULL;
sculpt_session->mloop = NULL;
}
/* NOTE: CCG becomes an owner of Subdiv descriptor, so can not share
* this pointer. Not sure if it's needed, but might have a second look
* on the ownership model here. */
runtime_data->subdiv = NULL;
// BKE_subdiv_stats_print(&subdiv->stats);
}
else {
result = multires_as_mesh(mmd, ctx, mesh, subdiv);
// BKE_subdiv_stats_print(&subdiv->stats);
if (subdiv != runtime_data->subdiv) {
BKE_subdiv_free(subdiv);
}
}
return result;
}
ModifierTypeInfo modifierType_Multires = {
/* name */ "Multires",
/* structName */ "MultiresModifierData",
/* structSize */ sizeof(MultiresModifierData),
/* type */ eModifierTypeType_Constructive,
/* flags */ eModifierTypeFlag_AcceptsMesh | eModifierTypeFlag_SupportsMapping |
eModifierTypeFlag_RequiresOriginalData,
/* copyData */ copyData,
/* deformVerts */ NULL,
/* deformMatrices */ NULL,
/* deformVertsEM */ NULL,
/* deformMatricesEM */ NULL,
/* applyModifier */ applyModifier,
/* initData */ initData,
/* requiredDataMask */ NULL,
/* freeData */ freeData,
/* isDisabled */ NULL,
/* updateDepsgraph */ NULL,
/* dependsOnTime */ NULL,
/* dependsOnNormals */ NULL,
/* foreachObjectLink */ NULL,
/* foreachIDLink */ NULL,
/* foreachTexLink */ NULL,
/* freeRuntimeData */ freeRuntimeData,
};
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