74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef GLTFIO_MORPHHELPER_H
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#define GLTFIO_MORPHHELPER_H
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#include "FFilamentAsset.h"
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#include "FFilamentInstance.h"
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#include <filament/MorphTargetBuffer.h>
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#include <math/vec4.h>
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#include <tsl/robin_map.h>
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#include <vector>
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struct cgltf_node;
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struct cgltf_mesh;
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struct cgltf_primitive;
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namespace gltfio {
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/**
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* Internal class that partitions lists of morph weights and maintains a cache of BufferObject
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* instances. This allows gltfio to support up to 255 morph targets.
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*
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* Each partition is associated with an unordered set of 4 (or fewer) morph target indices, which
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* we call the "primary indices" for that time slice.
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*
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* Animator has ownership over a single instance of MorphHelper, thus it is 1:1 with FilamentAsset.
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*/
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class MorphHelper {
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public:
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using Entity = utils::Entity;
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MorphHelper(FFilamentAsset* asset, FFilamentInstance* inst);
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~MorphHelper();
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void setWeights(Entity entity, float const* weights, int count) noexcept;
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int getTargetCount(Entity entity) const noexcept;
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private:
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struct GltfPrimitive {
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filament::MorphTargetBuffer* targets;
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};
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struct TableEntry {
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std::vector<GltfPrimitive> primitives; // TODO: flatten this?
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};
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void addPrimitive(cgltf_mesh const* mesh, int primitiveIndex, Entity entity);
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tsl::robin_map<Entity, TableEntry> mMorphTable;
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const FFilamentAsset* mAsset;
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const FFilamentInstance* mInstance;
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};
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} // namespace gltfio
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#endif // GLTFIO_MORPHHELPER_H
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