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DirectXMath 3.00
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‎Inc/DirectXCollision.h

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//-------------------------------------------------------------------------------------
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// DirectXCollision.h -- C++ Collision Math library
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//
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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// PARTICULAR PURPOSE.
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-------------------------------------------------------------------------------------
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#ifdef _MSC_VER
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#pragma once
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#endif
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#include "DirectXMath.h"
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namespace DirectX
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{
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enum ContainmentType
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{
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DISJOINT = 0,
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INTERSECTS = 1,
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CONTAINS = 2,
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};
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enum PlaneIntersectionType
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{
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FRONT = 0,
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INTERSECTING = 1,
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BACK = 2,
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};
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struct BoundingBox;
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#pragma warning(push)
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#pragma warning(disable:4324)
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//-------------------------------------------------------------------------------------
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// Bounding sphere
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//-------------------------------------------------------------------------------------
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__declspec(align(16)) struct BoundingSphere
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{
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XMFLOAT3 Center; // Center of the sphere.
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float Radius; // Radius of the sphere.
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// Creators
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BoundingSphere() : Center(0,0,0), Radius( 1.f ) {}
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BoundingSphere( _In_ const XMFLOAT3& center, _In_ float radius )
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: Center(center), Radius(radius) { assert( radius >= 0.f ); };
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BoundingSphere( _In_ const BoundingSphere& sp )
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: Center(sp.Center), Radius(sp.Radius) {}
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// Methods
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BoundingSphere& operator=( _In_ const BoundingSphere& sp ) { Center = sp.Center; Radius = sp.Radius; return *this; }
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void Transform( _Out_ BoundingSphere& Out, _In_ CXMMATRIX M ) const;
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void Transform( _Out_ BoundingSphere& Out, _In_ float Scale, _In_ FXMVECTOR Rotation, _In_ FXMVECTOR Translation ) const;
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// Transform the sphere
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ContainmentType Contains( _In_ FXMVECTOR Point ) const;
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ContainmentType Contains( _In_ FXMVECTOR V0, _In_ FXMVECTOR V1, _In_ FXMVECTOR V2 ) const;
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ContainmentType Contains( _In_ const BoundingSphere& sh ) const;
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ContainmentType Contains( _In_ const BoundingBox& box ) const;
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bool Intersects( _In_ const BoundingSphere& sh ) const;
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bool Intersects( _In_ const BoundingBox& box ) const;
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bool Intersects( _In_ FXMVECTOR V0, _In_ FXMVECTOR V1, _In_ FXMVECTOR V2 ) const;
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// Triangle-sphere test
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PlaneIntersectionType Intersects( _In_ FXMVECTOR Plane ) const;
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// Plane-sphere test
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bool Intersects( _In_ FXMVECTOR Origin, _In_ FXMVECTOR Direction, _Out_ float& Dist ) const;
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// Ray-sphere test
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// Static methods
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static void CreateMerged( _Out_ BoundingSphere& Out, _In_ const BoundingSphere& S1, _In_ const BoundingSphere& S2 );
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static void CreateFromBoundingBox( _Out_ BoundingSphere& Out, _In_ const BoundingBox& box );
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static void CreateFromPoints( _Out_ BoundingSphere& Out, _In_ size_t Count,
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_In_reads_bytes_(sizeof(XMFLOAT3)+Stride*(Count-1)) const XMFLOAT3* pPoints, _In_ size_t Stride );
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};
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//-------------------------------------------------------------------------------------
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// Axis-aligned bounding box
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//-------------------------------------------------------------------------------------
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__declspec(align(16)) struct BoundingBox
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{
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static const size_t CORNER_COUNT = 8;
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XMFLOAT3 Center; // Center of the box.
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XMFLOAT3 Extents; // Distance from the center to each side.
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// Creators
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BoundingBox() : Center(0,0,0), Extents( 1.f, 1.f, 1.f ) {}
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BoundingBox( _In_ const XMFLOAT3& center, _In_ const XMFLOAT3& extents )
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: Center(center), Extents(extents) { assert(extents.x >= 0 && extents.y >= 0 && extents.z >= 0); }
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BoundingBox( _In_ const BoundingBox& box ) : Center(box.Center), Extents(box.Extents) {}
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// Methods
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BoundingBox& operator=( _In_ const BoundingBox& box) { Center = box.Center; Extents = box.Extents; return *this; }
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void Transform( _Out_ BoundingBox& Out, _In_ CXMMATRIX M ) const;
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void Transform( _Out_ BoundingBox& Out, _In_ float Scale, _In_ FXMVECTOR Rotation, _In_ FXMVECTOR Translation ) const;
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void GetCorners( _Out_writes_(8) XMFLOAT3* Corners ) const;
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// Gets the 8 corners of the box
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ContainmentType Contains( _In_ FXMVECTOR Point ) const;
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ContainmentType Contains( _In_ FXMVECTOR V0, _In_ FXMVECTOR V1, _In_ FXMVECTOR V2 ) const;
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ContainmentType Contains( _In_ const BoundingSphere& sh ) const;
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ContainmentType Contains( _In_ const BoundingBox& box ) const;
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bool Intersects( _In_ const BoundingSphere& sh ) const;
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bool Intersects( _In_ const BoundingBox& box ) const;
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bool Intersects( _In_ FXMVECTOR V0, _In_ FXMVECTOR V1, _In_ FXMVECTOR V2 ) const;
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// Triangle-Box test
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PlaneIntersectionType Intersects( _In_ FXMVECTOR Plane ) const;
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// Plane-box test
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bool Intersects( _In_ FXMVECTOR Origin, _In_ FXMVECTOR Direction, _Out_ float& Dist ) const;
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// Ray-Box test
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// Static methods
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static void CreateMerged( _Out_ BoundingBox& Out, _In_ const BoundingBox& b1, _In_ const BoundingBox& b2 );
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static void CreateFromSphere( _Out_ BoundingBox& Out, _In_ const BoundingSphere& sh );
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static void CreateFromPoints( _Out_ BoundingBox& Out, _In_ FXMVECTOR pt1, _In_ FXMVECTOR pt2 );
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static void CreateFromPoints( _Out_ BoundingBox& Out, _In_ size_t Count,
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_In_reads_bytes_(sizeof(XMFLOAT3)+Stride*(Count-1)) const XMFLOAT3* pPoints, _In_ size_t Stride );
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};
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#pragma warning(pop)
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/****************************************************************************
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*
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* Implementation
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*
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****************************************************************************/
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#pragma warning(push)
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#pragma warning(disable:4068)
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#pragma prefast(push)
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#pragma prefast(disable : 25000, "FXMVECTOR is 16 bytes")
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#include "DirectXCollision.inl"
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#pragma prefast(pop)
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#pragma warning(pop)
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}; // namespace DirectX
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