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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 <iostream>
#include <string>

#include "MEM_guardedalloc.h"

#include "BLI_utildefines.h"

#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "DNA_pointcloud_types.h"
#include "DNA_scene_types.h"
#include "DNA_simulation_types.h"

#include "BKE_customdata.h"
#include "BKE_lib_query.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"

#include "DEG_depsgraph_build.h"
#include "DEG_depsgraph_query.h"

#include "MOD_modifiertypes.h"

static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphContext *ctx)
{
  SimulationModifierData *smd = (SimulationModifierData *)md;
  if (smd->simulation) {
    DEG_add_simulation_relation(ctx->node, smd->simulation, "Accessed Simulation");
  }
}

static void foreachIDLink(ModifierData *md, Object *ob, IDWalkFunc walk, void *userData)
{
  SimulationModifierData *smd = (SimulationModifierData *)md;
  walk(userData, ob, (ID **)&smd->simulation, IDWALK_CB_USER);
}

static bool isDisabled(const struct Scene *UNUSED(scene),
                       ModifierData *md,
                       bool UNUSED(useRenderParams))
{
  SimulationModifierData *smd = (SimulationModifierData *)md;
  return smd->simulation == nullptr;
}

static PointCloud *modifyPointCloud(ModifierData *md,
                                    const ModifierEvalContext *UNUSED(ctx),
                                    PointCloud *pointcloud)
{
  SimulationModifierData *smd = (SimulationModifierData *)md;
  UNUSED_VARS(smd);
  return pointcloud;
}

ModifierTypeInfo modifierType_Simulation = {
    /* name */ "Simulation",
    /* structName */ "SimulationModifierData",
    /* structSize */ sizeof(SimulationModifierData),
    /* type */ eModifierTypeType_None,
    /* flags */ (ModifierTypeFlag)0,

    /* copyData */ modifier_copyData_generic,

    /* deformVerts */ NULL,
    /* deformMatrices */ NULL,
    /* deformVertsEM */ NULL,
    /* deformMatricesEM */ NULL,
    /* modifyMesh */ NULL,
    /* modifyHair */ NULL,
    /* modifyPointCloud */ modifyPointCloud,
    /* modifyVolume */ NULL,

    /* initData */ NULL,
    /* requiredDataMask */ NULL,
    /* freeData */ NULL,
    /* isDisabled */ isDisabled,
    /* updateDepsgraph */ updateDepsgraph,
    /* dependsOnTime */ NULL,
    /* dependsOnNormals */ NULL,
    /* foreachObjectLink */ NULL,
    /* foreachIDLink */ foreachIDLink,
    /* foreachTexLink */ NULL,
    /* freeRuntimeData */ NULL,
};