497 lines
12 KiB
C++
497 lines
12 KiB
C++
// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
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// This file is part of the "Nazara Engine - Math module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Core/Algorithm.hpp>
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#include <Nazara/Core/Error.hpp>
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#include <algorithm>
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#include <cstring>
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#include <sstream>
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#include <Nazara/Core/Debug.hpp>
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namespace Nz
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{
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/*!
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* \ingroup math
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* \class Nz::BoundingVolume
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* \brief Math class that represents a bounding volume, a combination of a box and an oriented box
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*
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* \remark You need to call Update not to have undefined behaviour
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*/
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/*!
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* \brief Constructs a BoundingVolume object by default
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*
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* \remark extent is set to Extent::Null, aabb and obb are uninitialized
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*/
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template<typename T>
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constexpr BoundingVolume<T>::BoundingVolume() :
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extent(Extent::Null)
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{
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}
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/*!
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* \brief Constructs a BoundingVolume object from Extent
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* \param Extent Extent of the volume part of enumeration Extent
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*
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* \remark Aabb and obb are uninitialized
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*/
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template<typename T>
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constexpr BoundingVolume<T>::BoundingVolume(Extent Extend) :
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extent(Extend)
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{
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}
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/*!
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* \brief Constructs a BoundingVolume object from a box
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*
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* \param box Box<T> object
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*
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* \remark Aabb is uninitialized
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*/
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template<typename T>
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constexpr BoundingVolume<T>::BoundingVolume(const Box<T>& box) :
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extent(Extent::Finite),
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obb(box)
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{
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}
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/*!
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* \brief Constructs a BoundingVolume object from an oriented box
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*
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* \param orientedBox OrientedBox<T> object
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*
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* \remark Aabb is uninitialized
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*/
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template<typename T>
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constexpr BoundingVolume<T>::BoundingVolume(const OrientedBox<T>& orientedBox) :
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extent(Extent::Finite),
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obb(orientedBox)
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{
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}
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/*!
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* \brief Constructs a BoundingVolume object from another type of BoundingVolume
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*
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* \param volume BoundingVolume of type U to convert to type T
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*/
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template<typename T>
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template<typename U>
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constexpr BoundingVolume<T>::BoundingVolume(const BoundingVolume<U>& volume) :
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extent(volume.extent),
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aabb(volume.aabb),
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obb(volume.obb)
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{
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}
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template<typename T>
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constexpr bool BoundingVolume<T>::ApproxEqual(const BoundingVolume& volume, T maxDifference) const
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{
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if (extent != volume.extent)
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return false;
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if (extent != Extent::Finite)
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return true;
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return aabb.ApproxEqual(volume.aabb, maxDifference) && obb.ApproxEqual(volume.obb, maxDifference);
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}
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/*!
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* \brief Extends the bounding volume to contain another bounding volume
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* \return A reference to the the bounding volume
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*
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* \param volume Other volume to contain
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*
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* \remark Extending to a null bounding volume has no effect while extending to a infinite bounding volume will set it as infinite
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*/
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template<typename T>
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constexpr BoundingVolume<T>& BoundingVolume<T>::ExtendTo(const BoundingVolume& volume)
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{
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switch (extent)
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{
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case Extent::Finite:
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{
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switch (volume.extent)
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{
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case Extent::Finite:
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{
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// Extent the OBB local box
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obb.localBox.ExtendTo(volume.obb.localBox);
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break;
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}
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case Extent::Infinite:
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extent = Extent::Infinite;
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break;
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case Extent::Null:
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break;
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}
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break;
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}
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case Extent::Infinite:
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break; //< We already contain the bounding volume
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case Extent::Null:
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Set(volume);
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break;
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}
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return *this;
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}
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template<typename T>
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constexpr bool BoundingVolume<T>::Intersect(const Box<T>& box) const
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{
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switch (extent)
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{
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case Extent::Infinite:
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return true;
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case Extent::Finite:
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return aabb.Intersect(box);
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case Extent::Null:
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return false;
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}
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return false;
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}
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/*!
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* \brief Checks whether the volume is finite
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* \return true if extent is Extent::Finite
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*/
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template<typename T>
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constexpr bool BoundingVolume<T>::IsFinite() const
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{
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return extent == Extent::Finite;
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}
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/*!
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* \brief Checks whether the volume is infinite
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* \return true if extent is Extent::Infinite
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*/
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template<typename T>
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constexpr bool BoundingVolume<T>::IsInfinite() const
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{
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return extent == Extent::Infinite;
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}
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/*!
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* \brief Checks whether the volume is null
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* \return true if extent is Extent::Null
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*/
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template<typename T>
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constexpr bool BoundingVolume<T>::IsNull() const
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{
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return extent == Extent::Null;
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}
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/*!
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* \brief Gives a string representation
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* \return A string representation of the object: "BoundingVolume(localBox="")" if finite, or "BoundingVolume(Infinite)" or "BoundingVolume(Null)"
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*
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* \remark If enumeration is not defined in Extent, a NazaraError is thrown and "BoundingVolume(ERROR)" is returned
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*/
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template<typename T>
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std::string BoundingVolume<T>::ToString() const
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{
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std::ostringstream ss;
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ss << *this;
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return ss.str();
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}
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/*!
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* \brief Updates the obb and the aabb of the bounding volume
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*
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* \param transformMatrix Matrix4 which represents the transformation to apply
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*/
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template<typename T>
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constexpr void BoundingVolume<T>::Update(const Matrix4<T>& transformMatrix)
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{
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obb.Update(transformMatrix);
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aabb = Box<T>::FromExtends(obb(0), obb(1));
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for (unsigned int i = 2; i < 8; ++i)
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aabb.ExtendTo(obb(i));
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}
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/*!
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* \brief Updates the obb and the aabb of the bounding volume
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*
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* \param translation Vector3 which represents the translation to apply
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*/
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template<typename T>
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constexpr void BoundingVolume<T>::Update(const Vector3<T>& translation)
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{
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obb.Update(translation);
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aabb = Box<T>::FromExtends(obb(0), obb(1));
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for (unsigned int i = 2; i < 8; ++i)
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aabb.ExtendTo(obb(i));
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}
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/*!
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* \brief Multiplies the lengths of the obb with the scalar
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* \return A BoundingVolume where the position is the same and width, height and depth are the product of the old width, height and depth and the scalar
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*
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* \param scale The scalar to multiply width, height and depth with
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*/
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template<typename T>
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constexpr BoundingVolume<T> BoundingVolume<T>::operator*(T scalar) const
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{
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BoundingVolume volume(*this);
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volume *= scalar;
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return volume;
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}
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/*!
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* \brief Multiplies the lengths of this bounding volume with the scalar
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* \return A reference to this bounding volume where lengths are the product of these lengths and the scalar
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*
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* \param scalar The scalar to multiply width, height and depth with
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*/
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template<typename T>
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constexpr BoundingVolume<T>& BoundingVolume<T>::operator*=(T scalar)
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{
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obb *= scalar;
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return *this;
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}
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/*!
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* \brief Compares the bounding volume to other one
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* \return true if the two bounding volumes are the same
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*
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* \param volume Other bounding volume to compare with
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*/
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template<typename T>
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constexpr bool BoundingVolume<T>::operator==(const BoundingVolume& volume) const
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{
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if (extent != volume.extent)
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return false;
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if (extent == Extent::Finite)
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{
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if (aabb != volume.aabb)
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return false;
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if (obb != volume.obb)
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return false;
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}
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return true;
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}
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/*!
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* \brief Compares the bounding volume to other one
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* \return false if the two bounding volumes are the same
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*
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* \param volume Other bounding volume to compare with
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*/
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template<typename T>
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constexpr bool BoundingVolume<T>::operator!=(const BoundingVolume& volume) const
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{
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return !operator==(volume);
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}
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template<typename T>
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constexpr bool BoundingVolume<T>::ApproxEqual(const BoundingVolume& lhs, const BoundingVolume& rhs, T maxDifference)
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{
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return lhs.ApproxEqual(rhs, maxDifference);
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}
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/*!
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* \brief Shorthand for the bounding volume (Extent::Infinite)
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* \return A bounding volume with Extent::Infinite
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*/
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template<typename T>
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constexpr BoundingVolume<T> BoundingVolume<T>::Infinite()
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{
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return BoundingVolume(Extent::Infinite);
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}
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/*!
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* \brief Interpolates the bounding volume to other one with a factor of interpolation
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* \return A new bounding volume box which is the interpolation of two bounding volumes
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*
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* \param from Initial bounding volume
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* \param to Target bounding volume
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* \param interpolation Factor of interpolation
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*
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* \remark interpolation is meant to be between 0 and 1, other values are potentially undefined behavior
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* \remark With NAZARA_DEBUG, a NazaraError is thrown and Null() is returned
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* \remark If enumeration is not defined in Extent, a NazaraError is thrown and Null() is returned
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*
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* \see Lerp
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*/
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template<typename T>
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constexpr BoundingVolume<T> BoundingVolume<T>::Lerp(const BoundingVolume& from, const BoundingVolume& to, T interpolation)
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{
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if (NumberEquals(interpolation, T(0.0)))
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return from;
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if (NumberEquals(interpolation, T(1.0)))
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return to;
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switch (to.extent)
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{
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case Extent::Finite:
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{
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switch (from.extent)
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{
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case Extent::Finite:
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return BoundingVolume{ OrientedBox<T>::Lerp(from.obb, to.obb, interpolation) };
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case Extent::Infinite:
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return Infinite();
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case Extent::Null:
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{
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Box<T> destBox = to.obb.localBox;
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destBox.Scale(interpolation);
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return { destBox };
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}
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}
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// If we arrive here, the extent is invalid
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NazaraError("Invalid extent type (From) (0x" + NumberToString(UnderlyingCast(from.extent), 16) + ')');
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return Null();
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}
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case Extent::Infinite:
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return Infinite(); // A little bit of infinity is already too much ;)
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case Extent::Null:
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{
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switch (from.extent)
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{
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case Extent::Finite:
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{
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Box<T> fromBox = from.obb.localBox;
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fromBox.Scale(T(1.0) - interpolation);
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return { fromBox };
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}
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case Extent::Infinite:
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return Infinite();
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case Extent::Null:
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return Null();
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}
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// If we arrive here, the extent is invalid
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NazaraError("Invalid extent type (From) (0x" + NumberToString(UnderlyingCast(from.extent), 16) + ')');
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return Null();
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}
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}
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// If we arrive here, the extent is invalid
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NazaraError("Invalid extent type (To) (0x" + NumberToString(UnderlyingCast(to.extent), 16) + ')');
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return Null();
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}
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/*!
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* \brief Shorthand for the bounding volume (Extent::Null)
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* \return A bounding volume with Extent::Null
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*/
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template<typename T>
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constexpr BoundingVolume<T> BoundingVolume<T>::Null()
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{
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return BoundingVolume(Extent::Null);
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}
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/*!
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* \brief Serializes a BoundingVolume
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* \return true if successfully serialized
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*
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* \param context Serialization context
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* \param boundingVolume Input bounding volume
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*
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* \remark Does not save OBB corners
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*/
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template<typename T>
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bool Serialize(SerializationContext& context, const BoundingVolume<T>& boundingVolume, TypeTag<BoundingVolume<T>>)
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{
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if (!Serialize(context, static_cast<UInt8>(boundingVolume.extent)))
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return false;
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if (!Serialize(context, boundingVolume.aabb))
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return false;
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if (!Serialize(context, boundingVolume.obb))
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return false;
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return true;
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}
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/*!
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* \brief Unserializes a BoundingVolume
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* \return true if successfully unserialized
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*
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* \param context Serialization context
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* \param boundingVolume Output bounding volume
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*
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* \remark The resulting oriented box corners will *not* be updated, a call to Update is required
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*/
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template<typename T>
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bool Unserialize(SerializationContext& context, BoundingVolume<T>* boundingVolume, TypeTag<BoundingVolume<T>>)
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{
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UInt8 extend;
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if (!Unserialize(context, &extend))
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return false;
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if (extend > UnderlyingCast(Extent::Max))
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return false;
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boundingVolume->extent = static_cast<Extent>(extend);
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if (!Unserialize(context, &boundingVolume->aabb))
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return false;
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if (!Unserialize(context, &boundingVolume->obb))
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return false;
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return true;
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}
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/*!
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* \brief Output operator
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* \return The stream
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*
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* \param out The stream
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* \param volume The bounding volume to output
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*/
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template<typename T>
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std::ostream& operator<<(std::ostream& out, const Nz::BoundingVolume<T>& volume)
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{
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switch (volume.extent)
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{
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case Nz::Extent::Finite:
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out << "BoundingVolume(localBox=" << volume.obb.localBox << ')';
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break;
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case Nz::Extent::Infinite:
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out << "BoundingVolume(Infinite)";
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break;
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case Nz::Extent::Null:
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out << "BoundingVolume(Null)";
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break;
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}
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return out;
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}
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}
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#include <Nazara/Core/DebugOff.hpp>
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