TAabb.hpp

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/* This file is part of Berserk Engine project                                    */
/* https://github.com/EgorOrachyov/Berserk                                        */
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/* Copyright (c) 2018 - 2021 Egor Orachyov                                        */
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#ifndef BERSERK_TAABB_HPP
#define BERSERK_TAABB_HPP
 
#include <core/Config.hpp>
#include <core/math/MathUtils.hpp>
#include <core/math/TVecN.hpp>
 
BRK_NS_BEGIN
 
template<typename T>
class TAabb {
public:
    TAabb() = default;
 
    TAabb(const TVecN<T, 3> &minv, const TVecN<T, 3> &maxv) {
        min = minv;
        max = maxv;
    }
 
    TAabb(const TVecN<T, 3> &center, T radius) {
        TVecN<T, 3> offset = {radius, radius, radius};
        min = center - offset;
        max = center + radius;
    }
 
    void Fit(const TVecN<T, 3> &p) {
        min = TVecN<T, 3>::Min(min, p);
        max = TVecN<T, 3>::Max(max, p);
    }
 
    void Fit(const TAabb &aabb) {
        min = TVecN<T, 3>::Min(min, aabb.min);
        max = TVecN<T, 3>::Max(max, aabb.max);
    }
 
    bool Contains(const TVecN<T, 3> &p) const {
        return min <= p && p <= max;
    }
 
    bool Contains(const TAabb<T> &aabb) const {
        return min <= aabb.min && aabb.max <= max;
    }
 
    void GetPoints(T *points) const {
        points[0] = TVecN<T, 3>(min[0], min[1], min[2]);
        points[1] = TVecN<T, 3>(min[0], min[1], max[2]);
        points[2] = TVecN<T, 3>(min[0], max[1], min[2]);
        points[3] = TVecN<T, 3>(min[0], max[1], max[2]);
        points[4] = TVecN<T, 3>(max[0], min[1], min[2]);
        points[5] = TVecN<T, 3>(max[0], min[1], max[2]);
        points[6] = TVecN<T, 3>(max[0], max[1], min[2]);
        points[7] = TVecN<T, 3>(max[0], max[1], max[2]);
    }
 
    TVecN<T, 3> GetCenter() const {
        return (max + min) * static_cast<T>(0.5);
    }
 
    TVecN<T, 3> GetExtent() const {
        return (max - min) * static_cast<T>(0.5);
    }
 
    const TVecN<T, 3> &GetMin() const {
        return min;
    }
 
    const TVecN<T, 3> &GetMax() const {
        return max;
    }
 
private:
    TVecN<T, 3> min{0, 0, 0};
    TVecN<T, 3> max{0, 0, 0};
};
 
using Aabbf = TAabb<float>;
 
BRK_NS_END
 
#endif//BERSERK_TAABB_HPP