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Math/Frustum: Add ComputeCorners and GetAABB

This commit is contained in:
SirLynix 2023-08-25 17:13:07 +02:00
parent d4b2cede15
commit 532b1b2c4d
2 changed files with 33 additions and 0 deletions
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2
include/Nazara/Math/Frustum.hpp
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@ -37,6 +37,7 @@ namespace Nz
constexpr bool ApproxEqual(const Frustum& frustum, T maxDifference = std::numeric_limits<T>::epsilon()) const;
constexpr Vector3<T> ComputeCorner(BoxCorner corner) const;
constexpr EnumArray<BoxCorner, Vector3<T>> ComputeCorners() const;
constexpr bool Contains(const BoundingVolume<T>& volume) const;
constexpr bool Contains(const Box<T>& box) const;
@ -45,6 +46,7 @@ namespace Nz
constexpr bool Contains(const Vector3<T>& point) const;
constexpr bool Contains(const Vector3<T>* points, std::size_t pointCount) const;
constexpr const Box<T>& GetAABB() const;
constexpr const Plane<T>& GetPlane(FrustumPlane plane) const;
constexpr const EnumArray<FrustumPlane, Plane<T>>& GetPlanes() const;

31
include/Nazara/Math/Frustum.inl
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@ -85,6 +85,21 @@ namespace Nz
return Vector3<T>();
}
template<typename T>
constexpr EnumArray<BoxCorner, Vector3<T>> Frustum<T>::ComputeCorners() const
{
return {
ComputeCorner(BoxCorner::FarLeftBottom),
ComputeCorner(BoxCorner::FarLeftTop),
ComputeCorner(BoxCorner::FarRightBottom),
ComputeCorner(BoxCorner::FarRightTop),
ComputeCorner(BoxCorner::NearLeftBottom),
ComputeCorner(BoxCorner::NearLeftTop),
ComputeCorner(BoxCorner::NearRightBottom),
ComputeCorner(BoxCorner::NearRightTop)
};
}
/*!
* \brief Checks whether or not a bounding volume is contained in the frustum
* \return true if the bounding volume is entirely in the frustum
@ -229,6 +244,22 @@ namespace Nz
return true;
}
template<typename T>
constexpr const Box<T>& Frustum<T>::GetAABB() const
{
EnumArray<BoxCorner, Vector3<T>> corners = ComputeCorners();
Vector3f max = corners.front();
Vector3f min = corners.front();
for (std::size_t i = 1; i < corners.size(); ++i)
{
max.Maximize(corners[static_cast<BoxCorner>(i)]);
min.Minimize(corners[static_cast<BoxCorner>(i)]);
}
return Box<T>::FromExtends(min, max);
}
/*!
* \brief Gets the Plane for the face
* \return The face of the frustum according to enum FrustumPlane