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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2020 Blender Foundation. All rights reserved. */
#include "usd_writer_metaball.h"
#include "usd_hierarchy_iterator.h"
#include <pxr/usd/usdGeom/mesh.h>
#include <pxr/usd/usdShade/material.h>
#include <pxr/usd/usdShade/materialBindingAPI.h>
#include "BLI_assert.h"
#include "BKE_displist.h"
#include "BKE_lib_id.h"
#include "BKE_mball.h"
#include "BKE_mesh.h"
#include "BKE_object.h"
#include "DNA_mesh_types.h"
#include "DNA_meta_types.h"
namespace blender::io::usd {
USDMetaballWriter::USDMetaballWriter(const USDExporterContext &ctx) : USDGenericMeshWriter(ctx)
{
}
bool USDMetaballWriter::is_supported(const HierarchyContext *context) const
{
Scene *scene = DEG_get_input_scene(usd_export_context_.depsgraph);
return is_basis_ball(scene, context->object) && USDGenericMeshWriter::is_supported(context);
}
bool USDMetaballWriter::check_is_animated(const HierarchyContext & /*context*/) const
{
/* We assume that metaballs are always animated, as the current object may
* not be animated but another ball in the same group may be. */
return true;
}
Mesh *USDMetaballWriter::get_export_mesh(Object *object_eval, bool &r_needsfree)
{
Mesh *mesh_eval = BKE_object_get_evaluated_mesh(object_eval);
if (mesh_eval != nullptr) {
/* Mesh_eval only exists when generative modifiers are in use. */
r_needsfree = false;
return mesh_eval;
}
r_needsfree = true;
return BKE_mesh_new_from_object(usd_export_context_.depsgraph, object_eval, false, false);
}
void USDMetaballWriter::free_export_mesh(Mesh *mesh)
{
BKE_id_free(nullptr, mesh);
}
bool USDMetaballWriter::is_basis_ball(Scene *scene, Object *ob) const
{
Object *basis_ob = BKE_mball_basis_find(scene, ob);
return ob == basis_ob;
}
} // namespace blender::io::usd
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