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* Build from sources with prebuilt dependencies. Cross build for x86_64 and older macOS SDKs.
69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
// Copyright (C) 2025 Lars Müller
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#pragma once
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#include "vector3d.h"
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#include "matrix4.h"
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#include "IVertexBuffer.h"
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#include <cassert>
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#include <memory>
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#include <optional>
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#include <vector>
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namespace scene
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{
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struct WeightBuffer
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{
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constexpr static u16 MAX_WEIGHTS_PER_VERTEX = 4;
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// ID-weight pairs for a joint
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struct VertexWeights {
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std::array<u16, MAX_WEIGHTS_PER_VERTEX> joint_ids = {};
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std::array<f32, MAX_WEIGHTS_PER_VERTEX> weights = {};
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void addWeight(u16 joint_id, f32 weight);
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/// Transform given position and normal with these weights
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void skinVertex(core::vector3df &pos, core::vector3df &normal,
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const std::vector<core::matrix4> &joint_transforms) const;
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};
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std::vector<VertexWeights> weights;
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std::optional<std::vector<u32>> animated_vertices;
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// A bit of a hack for now: Store static positions here so we can use them for skinning.
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// Ideally we might want a design where we do not mutate the original vertex buffer at all.
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std::unique_ptr<core::vector3df[]> static_positions;
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std::unique_ptr<core::vector3df[]> static_normals;
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WeightBuffer(size_t n_verts) : weights(n_verts) {}
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const std::array<u16, MAX_WEIGHTS_PER_VERTEX> &getJointIds(u32 vertex_id) const
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{ return weights[vertex_id].joint_ids; }
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const std::array<f32, MAX_WEIGHTS_PER_VERTEX> &getWeights(u32 vertex_id) const
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{ return weights[vertex_id].weights; }
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size_t size() const
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{ return weights.size(); }
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void addWeight(u32 vertex_id, u16 joint_id, f32 weight);
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/// Transform position and normal using the weights of the given vertex
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void skinVertex(u32 vertex_id, core::vector3df &pos, core::vector3df &normal,
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const std::vector<core::matrix4> &joint_transforms) const;
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/// @note src and dst can be the same buffer
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void skin(IVertexBuffer *dst,
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const std::vector<core::matrix4> &joint_transforms) const;
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/// Prepares this buffer for use in skinning.
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void finalize();
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void updateStaticPose(const IVertexBuffer *vbuf);
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void resetToStatic(IVertexBuffer *vbuf) const;
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};
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} // end namespace scene
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