DirectXMath 3.00

Inc/DirectXCollision.h

@@ -0,0 +1,160 @@
+//-------------------------------------------------------------------------------------
+// DirectXCollision.h -- C++ Collision Math library
+//
+// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
+// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
+// PARTICULAR PURPOSE.
+//  
+// Copyright (c) Microsoft Corporation. All rights reserved.
+//-------------------------------------------------------------------------------------
+
+#ifdef _MSC_VER
+#pragma once
+#endif
+
+#include "DirectXMath.h"
+
+namespace DirectX
+{
+
+enum ContainmentType
+{
+    DISJOINT = 0,
+    INTERSECTS = 1,
+    CONTAINS = 2,
+};
+
+enum PlaneIntersectionType
+{
+    FRONT = 0,
+    INTERSECTING = 1,
+    BACK = 2,
+};
+
+struct BoundingBox;
+
+#pragma warning(push)
+#pragma warning(disable:4324)
+
+//-------------------------------------------------------------------------------------
+// Bounding sphere
+//-------------------------------------------------------------------------------------
+__declspec(align(16)) struct BoundingSphere
+{
+    XMFLOAT3 Center;            // Center of the sphere.
+    float Radius;               // Radius of the sphere.
+
+    // Creators
+    BoundingSphere() : Center(0,0,0), Radius( 1.f ) {}
+    BoundingSphere( _In_ const XMFLOAT3& center, _In_ float radius )
+        : Center(center), Radius(radius) { assert( radius >= 0.f ); };
+    BoundingSphere( _In_ const BoundingSphere& sp )
+        : Center(sp.Center), Radius(sp.Radius) {}
+
+    // Methods
+    BoundingSphere& operator=( _In_ const BoundingSphere& sp ) { Center = sp.Center; Radius = sp.Radius; return *this; }
+
+    void Transform( _Out_ BoundingSphere& Out, _In_ CXMMATRIX M ) const;
+    void Transform( _Out_ BoundingSphere& Out, _In_ float Scale, _In_ FXMVECTOR Rotation, _In_ FXMVECTOR Translation ) const;
+        // Transform the sphere
+
+    ContainmentType Contains( _In_ FXMVECTOR Point ) const;
+    ContainmentType Contains( _In_ FXMVECTOR V0, _In_ FXMVECTOR V1, _In_ FXMVECTOR V2 ) const;
+    ContainmentType Contains( _In_ const BoundingSphere& sh ) const;
+    ContainmentType Contains( _In_ const BoundingBox& box ) const;
+
+    bool Intersects( _In_ const BoundingSphere& sh ) const;
+    bool Intersects( _In_ const BoundingBox& box ) const;
+
+    bool Intersects( _In_ FXMVECTOR V0, _In_ FXMVECTOR V1, _In_ FXMVECTOR V2 ) const;
+        // Triangle-sphere test
+
+    PlaneIntersectionType Intersects( _In_ FXMVECTOR Plane ) const;
+        // Plane-sphere test
+
+    bool Intersects( _In_ FXMVECTOR Origin, _In_ FXMVECTOR Direction, _Out_ float& Dist ) const;
+        // Ray-sphere test
+
+    // Static methods
+    static void CreateMerged( _Out_ BoundingSphere& Out, _In_ const BoundingSphere& S1, _In_ const BoundingSphere& S2 );
+
+    static void CreateFromBoundingBox( _Out_ BoundingSphere& Out, _In_ const BoundingBox& box );
+
+    static void CreateFromPoints( _Out_ BoundingSphere& Out, _In_ size_t Count,
+                                  _In_reads_bytes_(sizeof(XMFLOAT3)+Stride*(Count-1)) const XMFLOAT3* pPoints, _In_ size_t Stride );
+};
+
+//-------------------------------------------------------------------------------------
+// Axis-aligned bounding box
+//-------------------------------------------------------------------------------------
+__declspec(align(16)) struct BoundingBox
+{
+    static const size_t CORNER_COUNT = 8;
+
+    XMFLOAT3 Center;            // Center of the box.
+    XMFLOAT3 Extents;           // Distance from the center to each side.
+
+    // Creators
+    BoundingBox() : Center(0,0,0), Extents( 1.f, 1.f, 1.f ) {}
+    BoundingBox( _In_ const XMFLOAT3& center, _In_ const XMFLOAT3& extents )
+        : Center(center), Extents(extents) { assert(extents.x >= 0 && extents.y >= 0 && extents.z >= 0); }
+    BoundingBox( _In_ const BoundingBox& box ) : Center(box.Center), Extents(box.Extents) {}
+
+    // Methods
+    BoundingBox& operator=( _In_ const BoundingBox& box) { Center = box.Center; Extents = box.Extents; return *this; }
+
+    void Transform( _Out_ BoundingBox& Out, _In_ CXMMATRIX M ) const;
+    void Transform( _Out_ BoundingBox& Out, _In_ float Scale, _In_ FXMVECTOR Rotation, _In_ FXMVECTOR Translation ) const;
+
+    void GetCorners( _Out_writes_(8) XMFLOAT3* Corners ) const;
+        // Gets the 8 corners of the box
+
+    ContainmentType Contains( _In_ FXMVECTOR Point ) const;
+    ContainmentType Contains( _In_ FXMVECTOR V0, _In_ FXMVECTOR V1, _In_ FXMVECTOR V2 ) const;
+    ContainmentType Contains( _In_ const BoundingSphere& sh ) const;
+    ContainmentType Contains( _In_ const BoundingBox& box ) const;
+
+    bool Intersects( _In_ const BoundingSphere& sh ) const;
+    bool Intersects( _In_ const BoundingBox& box ) const;
+
+    bool Intersects( _In_ FXMVECTOR V0, _In_ FXMVECTOR V1, _In_ FXMVECTOR V2 ) const;
+        // Triangle-Box test
+
+    PlaneIntersectionType Intersects( _In_ FXMVECTOR Plane ) const;
+        // Plane-box test
+
+    bool Intersects( _In_ FXMVECTOR Origin, _In_ FXMVECTOR Direction, _Out_ float& Dist ) const;
+        // Ray-Box test
+
+    // Static methods
+    static void CreateMerged( _Out_ BoundingBox& Out, _In_ const BoundingBox& b1, _In_ const BoundingBox& b2 );
+
+    static void CreateFromSphere( _Out_ BoundingBox& Out, _In_ const BoundingSphere& sh );
+
+    static void CreateFromPoints( _Out_ BoundingBox& Out, _In_ FXMVECTOR pt1, _In_ FXMVECTOR pt2 );
+    static void CreateFromPoints( _Out_ BoundingBox& Out, _In_ size_t Count,
+                                  _In_reads_bytes_(sizeof(XMFLOAT3)+Stride*(Count-1)) const XMFLOAT3* pPoints, _In_ size_t Stride );
+};
+
+#pragma warning(pop)
+
+/****************************************************************************
+ *
+ * Implementation
+ *
+ ****************************************************************************/
+
+#pragma warning(push)
+#pragma warning(disable:4068)
+
+#pragma prefast(push)
+#pragma prefast(disable : 25000, "FXMVECTOR is 16 bytes")
+
+#include "DirectXCollision.inl"
+
+#pragma prefast(pop)
+#pragma warning(pop)
+
+}; // namespace DirectX
+