Bounds.hpp

/*
** ETIB PROJECT, 2026
** evan
** File description:
** Bounds
*/
 
#pragma once
 
#include <utility/math/aabb.hpp>
 
#include <glm/glm.hpp>
 
namespace evan
{
    inline utility::math::AabbF
        transformedBounds(const utility::math::AabbF &localBounds,
                          const glm::mat4 &transform)
    {
        if (localBounds.isEmpty() || transform == glm::mat4(1.0f)) {
            return localBounds;
        }
 
        const auto min = localBounds.getMin();
        const auto max = localBounds.getMax();
 
        utility::math::AabbF worldBounds;
        for (unsigned int corner = 0; corner < 8; ++corner) {
            const glm::vec4 position((corner & 1u) != 0u ? max.x : min.x,
                                     (corner & 2u) != 0u ? max.y : min.y,
                                     (corner & 4u) != 0u ? max.z : min.z, 1.0f);
            worldBounds.include(utility::math::Vector<float, 3>(
                glm::vec3(transform * position)));
        }
        return worldBounds;
    }
}    // namespace evan