sprite_animation.h

// © Joseph Cameron - All Rights Reserved
 
#ifndef GDK_SPRITE_ANIMATION_H
#define GDK_SPRITE_ANIMATION_H
 
#include <gdk/graphics_types.h>
 
#include <map>
 
namespace gdk {
    class sprite_animation final {
    public:
        using normalized_texture_coordinate_type = float;
        using normalized_time_type = float;
        using texel_coordinate_type = int;
        struct frame {
            texel_coordinate_type x;
            texel_coordinate_type y;
            texel_coordinate_type w;
            texel_coordinate_type h;
        };

        struct normalized_frame {
            normalized_texture_coordinate_type u;
            normalized_texture_coordinate_type v;
            normalized_texture_coordinate_type w;
            normalized_texture_coordinate_type h;
        };
        using frame_collection_type = std::map<normalized_time_type, frame>;

        normalized_frame at(const normalized_time_type aNormalizedTime, 
            const texel_coordinate_type aTextureWidth, 
            const texel_coordinate_type aTextureHeight) const;
 
        sprite_animation(frame_collection_type aFrameData);
 
    private:
        std::map<normalized_time_type, frame> m_Frames;
    };
}
 
#endif