skinning.h

// © Joseph Cameron - MIT License
 
#ifndef GDK_GRAPHICS_EXT_ANIMATION_SKINNING_H
#define GDK_GRAPHICS_EXT_ANIMATION_SKINNING_H
 
#include <gdk/graphics/ext/animation/skeleton.h>
 
#include <gdk/graphics/model_data.h>
 
#include <cstddef>
#include <vector>
#include <span>
 
namespace gdk::graphics::animation {
    struct vertex_weights final {
        std::size_t first = 0;
        std::size_t second = 0;
        float first_weight = 1.0f;
    };

    void skin(std::span<const vector3_type> aBindPositions,
        std::span<const vertex_weights> aWeights,
        std::span<const matrix4x4_type> aPalette,
        gdk::graphics::model_data &aTarget);

    struct skinned_mesh final {
        gdk::graphics::model_data data;
        std::vector<vector3_type> bind_positions;
        std::vector<vertex_weights> weights;
    };

    [[nodiscard]] skinned_mesh make_bone_boxes(const skeleton &aSkeleton, const float aHalfWidth);
}
 
#endif