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#pragma once
#include "core/math/concepts.hh"
namespace math
{
template<arithmetic T>
class AABB {
public:
using value_type = T;
using vector_type = glm::vec<3, T>;
constexpr AABB(void) = default;
constexpr explicit AABB(const vector_type& start, const vector_type& end);
virtual ~AABB(void) = default;
constexpr void set_bounds(const vector_type& start, const vector_type& end);
constexpr void set_offset(const vector_type& base, const vector_type& size);
constexpr bool contains(const vector_type& point) const;
constexpr bool intersect(const AABB<value_type>& other_box) const;
constexpr AABB<value_type> combine(const AABB<value_type>& other_box) const;
constexpr AABB<value_type> multiply(const AABB<value_type>& other_box) const;
constexpr AABB<value_type> push(const vector_type& vector) const;
public:
vector_type min {};
vector_type max {};
};
} // namespace math
namespace math
{
using AABBf = AABB<float>;
} // namespace math
template<math::arithmetic T>
constexpr math::AABB<T>::AABB(const vector_type& start, const vector_type& end)
{
set_bounds(start, end);
}
template<math::arithmetic T>
constexpr void math::AABB<T>::set_bounds(const vector_type& start, const vector_type& end)
{
min = start;
max = end;
}
template<math::arithmetic T>
constexpr void math::AABB<T>::set_offset(const vector_type& base, const vector_type& size)
{
min = base;
max = base + size;
}
template<math::arithmetic T>
constexpr bool math::AABB<T>::contains(const vector_type& point) const
{
auto result = true;
result = result && (point.x >= min.x) && (point.x <= max.x);
result = result && (point.y >= min.y) && (point.y <= max.y);
result = result && (point.z >= min.z) && (point.z <= max.z);
return result;
}
template<math::arithmetic T>
constexpr bool math::AABB<T>::intersect(const AABB<value_type>& other_box) const
{
auto result = true;
result = result && (min.x <= other_box.max.x) && (max.x >= other_box.min.x);
result = result && (min.y <= other_box.max.y) && (max.y >= other_box.min.y);
result = result && (min.z <= other_box.max.z) && (max.z >= other_box.min.z);
return result;
}
template<math::arithmetic T>
constexpr math::AABB<T> math::AABB<T>::combine(const AABB<value_type>& other_box) const
{
AABB<value_type> result;
result.min.x = glm::min(min.x, other_box.min.x);
result.min.y = glm::min(min.y, other_box.min.y);
result.min.z = glm::min(min.z, other_box.min.z);
result.max.x = glm::max(max.x, other_box.max.x);
result.max.y = glm::max(max.y, other_box.max.y);
result.max.z = glm::max(max.z, other_box.max.z);
return result;
}
template<math::arithmetic T>
constexpr math::AABB<T> math::AABB<T>::multiply(const AABB<value_type>& other_box) const
{
AABB<value_type> result;
result.min.x = glm::max(min.x, other_box.min.x);
result.min.y = glm::max(min.y, other_box.min.y);
result.min.z = glm::max(min.z, other_box.min.z);
result.max.x = glm::min(max.x, other_box.max.x);
result.max.y = glm::min(max.y, other_box.max.y);
result.max.z = glm::min(max.z, other_box.max.z);
return result;
}
template<math::arithmetic T>
constexpr math::AABB<T> math::AABB<T>::push(const vector_type& vector) const
{
AABB<value_type> result;
result.min = min + vector;
result.max = max + vector;
return result;
}
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