test2/source/blender/blenkernel/intern/simulation.cc

/* SPDX-FileCopyrightText: 2023 Blender Foundation
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

/** \file
 * \ingroup bke
 */

#include <iostream>

#include "MEM_guardedalloc.h"

#include "DNA_ID.h"
#include "DNA_defaults.h"
#include "DNA_modifier_types.h"
#include "DNA_scene_types.h"
#include "DNA_simulation_types.h"

#include "BLI_compiler_compat.h"
#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BLI_math_vector_types.hh"
#include "BLI_rand.h"
#include "BLI_span.hh"
#include "BLI_string.h"
#include "BLI_utildefines.h"

#include "BKE_anim_data.h"
#include "BKE_animsys.h"
#include "BKE_collection.h"
#include "BKE_customdata.h"
#include "BKE_idtype.h"
#include "BKE_lib_id.h"
#include "BKE_lib_query.h"
#include "BKE_lib_remap.h"
#include "BKE_main.h"
#include "BKE_modifier.h"
#include "BKE_node.hh"
#include "BKE_pointcache.h"
#include "BKE_simulation.h"
#include "BKE_simulation_state.hh"

#include "NOD_geometry.h"

#include "BLI_map.hh"
#include "BLT_translation.h"

#include "DEG_depsgraph.h"
#include "DEG_depsgraph_query.h"

#include "BLO_read_write.h"

static void simulation_init_data(ID *id)
{
  Simulation *simulation = (Simulation *)id;
  BLI_assert(MEMCMP_STRUCT_AFTER_IS_ZERO(simulation, id));

  MEMCPY_STRUCT_AFTER(simulation, DNA_struct_default_get(Simulation), id);

  blender::bke::ntreeAddTreeEmbedded(nullptr, id, "Geometry Nodetree", ntreeType_Geometry->idname);
}

static void simulation_copy_data(Main *bmain, ID *id_dst, const ID *id_src, const int flag)
{
  Simulation *simulation_dst = (Simulation *)id_dst;
  const Simulation *simulation_src = (const Simulation *)id_src;

  /* We always need allocation of our private ID data. */
  const int flag_private_id_data = flag & ~LIB_ID_CREATE_NO_ALLOCATE;

  if (simulation_src->nodetree) {
    BKE_id_copy_ex(bmain,
                   (ID *)simulation_src->nodetree,
                   (ID **)&simulation_dst->nodetree,
                   flag_private_id_data);
    simulation_dst->nodetree->owner_id = &simulation_dst->id;
  }
}

static void simulation_free_data(ID *id)
{
  Simulation *simulation = (Simulation *)id;

  BKE_animdata_free(&simulation->id, false);

  if (simulation->nodetree) {
    ntreeFreeEmbeddedTree(simulation->nodetree);
    MEM_freeN(simulation->nodetree);
    simulation->nodetree = nullptr;
  }
}

static void simulation_foreach_id(ID *id, LibraryForeachIDData *data)
{
  Simulation *simulation = (Simulation *)id;
  if (simulation->nodetree) {
    /* nodetree **are owned by IDs**, treat them as mere sub-data and not real ID! */
    BKE_LIB_FOREACHID_PROCESS_FUNCTION_CALL(
        data, BKE_library_foreach_ID_embedded(data, (ID **)&simulation->nodetree));
  }
}

static void simulation_blend_write(BlendWriter *writer, ID *id, const void *id_address)
{
  Simulation *simulation = (Simulation *)id;

  BLO_write_id_struct(writer, Simulation, id_address, &simulation->id);
  BKE_id_blend_write(writer, &simulation->id);

  if (simulation->adt) {
    BKE_animdata_blend_write(writer, simulation->adt);
  }

  /* nodetree is integral part of simulation, no libdata */
  if (simulation->nodetree) {
    BLO_Write_IDBuffer *temp_embedded_id_buffer = BLO_write_allocate_id_buffer();
    BLO_write_init_id_buffer_from_id(
        temp_embedded_id_buffer, &simulation->nodetree->id, BLO_write_is_undo(writer));
    BLO_write_struct_at_address(writer,
                                bNodeTree,
                                simulation->nodetree,
                                BLO_write_get_id_buffer_temp_id(temp_embedded_id_buffer));
    ntreeBlendWrite(
        writer,
        reinterpret_cast<bNodeTree *>(BLO_write_get_id_buffer_temp_id(temp_embedded_id_buffer)));
    BLO_write_destroy_id_buffer(&temp_embedded_id_buffer);
  }
}

static void simulation_blend_read_data(BlendDataReader *reader, ID *id)
{
  Simulation *simulation = (Simulation *)id;
  BLO_read_data_address(reader, &simulation->adt);
  BKE_animdata_blend_read_data(reader, simulation->adt);
}

static void simulation_blend_read_lib(BlendLibReader *reader, ID *id)
{
  Simulation *simulation = (Simulation *)id;
  UNUSED_VARS(simulation, reader);
}

static void simulation_blend_read_expand(BlendExpander *expander, ID *id)
{
  Simulation *simulation = (Simulation *)id;
  UNUSED_VARS(simulation, expander);
}

IDTypeInfo IDType_ID_SIM = {
    /*id_code*/ ID_SIM,
    /*id_filter*/ FILTER_ID_SIM,
    /*main_listbase_index*/ INDEX_ID_SIM,
    /*struct_size*/ sizeof(Simulation),
    /*name*/ "Simulation",
    /*name_plural*/ "simulations",
    /*translation_context*/ BLT_I18NCONTEXT_ID_SIMULATION,
    /*flags*/ IDTYPE_FLAGS_APPEND_IS_REUSABLE,
    /*asset_type_info*/ nullptr,

    /*init_data*/ simulation_init_data,
    /*copy_data*/ simulation_copy_data,
    /*free_data*/ simulation_free_data,
    /*make_local*/ nullptr,
    /*foreach_id*/ simulation_foreach_id,
    /*foreach_cache*/ nullptr,
    /*foreach_path*/ nullptr,
    /*owner_pointer_get*/ nullptr,

    /*blend_write*/ simulation_blend_write,
    /*blend_read_data*/ simulation_blend_read_data,
    /*blend_read_lib*/ simulation_blend_read_lib,
    /*blend_read_expand*/ simulation_blend_read_expand,

    /*blend_read_undo_preserve*/ nullptr,

    /*lib_override_apply_post*/ nullptr,
};

void *BKE_simulation_add(Main *bmain, const char *name)
{
  Simulation *simulation = (Simulation *)BKE_id_new(bmain, ID_SIM, name);
  return simulation;
}

void BKE_simulation_data_update(Depsgraph * /*depsgraph*/,
                                Scene * /*scene*/,
                                Simulation * /*simulation*/)
{
}

void BKE_simulation_reset_scene(Scene *scene)
{
  FOREACH_SCENE_OBJECT_BEGIN (scene, ob) {
    LISTBASE_FOREACH (ModifierData *, md, &ob->modifiers) {
      if (md->type != eModifierType_Nodes) {
        continue;
      }
      NodesModifierData *nmd = (NodesModifierData *)md;
      nmd->simulation_cache->reset();
    }
  }
  FOREACH_SCENE_OBJECT_END;
}