CharacterRig.hpp

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#pragma once
 
#include "FbxImportUtils.hpp"
#include "SkinVertex.hpp"
 
#include <glm/glm.hpp>
#include <glm/gtc/quaternion.hpp>
 
#include <cstdint>
#include <memory>
#include <string>
#include <unordered_map>
#include <vector>
 
namespace ozz::animation
{
class Skeleton;
}

struct SkinWeight
{
    int boneIndices[4] = {0, 0, 0, 0};
    float weights[4] = {0.0f, 0.0f, 0.0f, 0.0f};
};

struct RigMeshData
{
    std::vector<ModelVertex> baseVertices; 
    std::vector<SkinWeight> skinWeights;   
    std::vector<uint32_t> indices;         
    uint32_t materialIndex = 0;            
};

class CharacterRig
{
public:
    CharacterRig();
    ~CharacterRig();
    CharacterRig(const CharacterRig&) = delete;
    CharacterRig& operator=(const CharacterRig&) = delete;
    CharacterRig(CharacterRig&&) noexcept;
    CharacterRig& operator=(CharacterRig&&) noexcept;

    bool loadFromFBX(const std::string& path,
                     const glm::quat& orientationFix = glm::quat(1.0f, 0.0f, 0.0f, 0.0f),
                     bool flipNormals = false,
                     bool flipUVs = false);

    [[nodiscard]] bool isLoaded() const noexcept;

    [[nodiscard]] int numJoints() const noexcept;

    [[nodiscard]] const ozz::animation::Skeleton* skeleton() const noexcept;

    [[nodiscard]] const std::vector<glm::mat4>& inverseBindMatrices() const noexcept;

    [[nodiscard]] const std::vector<RigMeshData>& meshes() const noexcept;

    [[nodiscard]] const std::unordered_map<std::string, int>& jointMap() const noexcept;

    [[nodiscard]] const std::unordered_map<std::string, anim_utils::JointRestPose>& restPoses() const noexcept;

    void verticalBounds(float& outMinY, float& outMaxY) const;
 
private:
    struct Impl;
    std::unique_ptr<Impl> impl_;
};