animator.h

#pragma once
 
#include <cstdint>
#include <vector>
 
#include <glm/glm.hpp>
#include <glm/gtc/quaternion.hpp>
 
#include "core/reflect.h"
 
#include "resource/asset/animation_clip_asset.h"
#include "resource/asset/skeleton_asset.h"
 
namespace Vkm::Engine {

struct BoneAdjust {
    int32_t   bone = -1;                         
    glm::quat rotation{1.0f, 0.0f, 0.0f, 0.0f};  
    glm::vec3 offset{0.0f};                      
    float     scale    = 1.0f;                   
    bool      absolute = false;                  
};

struct Animator {
    SkeletonHandle      skeleton;  
    AnimationClipHandle clip;      

    float time    = 0.0f;
    float speed   = 1.0f;   
    bool  looping = true;

    bool playOnStart = true;

    bool playing = false;

    bool started = false;
 
    AnimationClipHandle fadeFrom;              
    float               fadeTime      = 0.0f;  
    float               fadeRemaining = 0.0f;  
    float               fadeDuration  = 0.0f;  

    bool                fadeLooping   = true;

    std::vector<BoneAdjust> adjust;

    static void crossFadeTo(Animator& animator, AnimationClipHandle clip, float seconds, bool looping);
};
 
} // namespace Vkm::Engine
 
VKM_REFLECT_BEGIN(::Vkm::Engine::Animator)
    VKM_F(skeleton)
    VKM_F(clip)
    VKM_F(speed)
    VKM_F(playOnStart)
    VKM_F(looping)
VKM_REFLECT_END()