usd_blend_shape_utils.hh

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/* SPDX-FileCopyrightText: 2023 NVIDIA Corporation. All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once
 
#include <pxr/usd/usd/prim.h>
 
struct Key;
struct Mesh;
struct Object;
 
namespace blender::io::usd {
 
/* Name of the temporary USD primvar for storing blend shape
 * weight time samples on the mesh before they are copied
 * to the bound skeleton. */
extern pxr::TfToken TempBlendShapeWeightsPrimvarName;
 
const Key *get_mesh_shape_key(const Object *obj);
 
bool is_mesh_with_shape_keys(const Object *obj);
 
void create_blend_shapes(pxr::UsdStageRefPtr stage,
                         const Object *obj,
                         const pxr::UsdPrim &mesh_prim,
                         bool allow_unicode);
 
pxr::VtFloatArray get_blendshape_weights(const Key *key);
 
void ensure_blend_shape_skeleton(pxr::UsdStageRefPtr stage, pxr::UsdPrim &mesh_prim);
 
void remap_blend_shape_anim(pxr::UsdStageRefPtr stage,
                            const pxr::SdfPath &skel_path,
                            const pxr::SdfPathSet &mesh_paths);
 
Mesh *get_shape_key_basis_mesh(Object *obj);
 
}  // namespace blender::io::usd