openrw/rwengine/include/loaders/LoaderIFP.hpp

#pragma once
#ifndef _LOADERDFF_IFP_
#define _LOADERDFF_IFP_

#include <string>
#include <vector>
#include <map>
#include <glm/glm.hpp>
#include <glm/gtx/quaternion.hpp>

struct AnimationKeyframe
{
    glm::quat rotation;
    glm::vec3 position;
    glm::vec3 scale;
    float starttime;
	size_t id;
};

struct AnimationBone
{
    std::string name;
    int32_t previous;
    int32_t next;
    float duration;

    enum Data {
        R00,
        RT0,
        RTS
    };

    Data type;
    std::vector<AnimationKeyframe> frames;

    AnimationKeyframe getInterpolatedKeyframe(float time);
	AnimationKeyframe getKeyframe(float time);
};

/**
 * @brief Animation data object, stores bones.
 *
 * @todo break out into Animation.hpp
 */
struct Animation
{
    std::string name;
	std::map<std::string, AnimationBone*> bones;
	
	float duration;
};

class LoaderIFP
{
    template<class T> T* read(char* data, size_t* ofs) {
        size_t b = *ofs; *ofs += sizeof(T);
        return reinterpret_cast<T*>(data + b);
    }
    template<class T> T* peek(char* data, size_t* ofs) {
        return reinterpret_cast<T*>(data + *ofs);
    }

    std::string readString(char* data, size_t* ofs);

public:

    struct BASE {
        char magic[4];
        uint32_t size;
    };

    struct INFO {
        BASE base;
        int32_t entries;
        // null terminated string
        // entry data
    };

    struct ANPK {
        BASE base;
        INFO info;
    };

    struct NAME {
        BASE base;
    };

    struct DGAN {
        BASE base;
        INFO info;
    };

    struct CPAN {
        BASE base;
    };

    struct ANIM {
        BASE base;
        char name[28];
        int32_t frames;
        int32_t unk;
        int32_t next;
        int32_t prev;
    };

    struct KFRM {
        BASE base;
    };

    struct Anim {
        std::string name;

    };

    std::map<std::string, Animation*> animations;

    bool loadFromMemory(char *data);
};

#endif