167 lines
4.6 KiB
C++
167 lines
4.6 KiB
C++
// This code contains NVIDIA Confidential Information and is disclosed to you
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// under a form of NVIDIA software license agreement provided separately to you.
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//
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// Notice
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// NVIDIA Corporation and its licensors retain all intellectual property and
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// proprietary rights in and to this software and related documentation and
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// any modifications thereto. Any use, reproduction, disclosure, or
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// distribution of this software and related documentation without an express
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// license agreement from NVIDIA Corporation is strictly prohibited.
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//
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// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
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// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
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// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
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// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// Information and code furnished is believed to be accurate and reliable.
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// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
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// information or for any infringement of patents or other rights of third parties that may
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// result from its use. No license is granted by implication or otherwise under any patent
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// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
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// This code supersedes and replaces all information previously supplied.
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// NVIDIA Corporation products are not authorized for use as critical
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// components in life support devices or systems without express written approval of
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// NVIDIA Corporation.
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//
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// Copyright (c) 2008-2013 NVIDIA Corporation. All rights reserved.
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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
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// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
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#ifndef PX_PHYSICS_GEOMUTILS_NX_SIMPLETRIANGLEMESH
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#define PX_PHYSICS_GEOMUTILS_NX_SIMPLETRIANGLEMESH
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/** \addtogroup geomutils
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@{
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*/
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#include "foundation/PxVec3.h"
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#include "geometry/PxPhysXGeomUtils.h"
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#include "foundation/PxFlags.h"
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#include "common/PxCoreUtilityTypes.h"
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#ifndef PX_DOXYGEN
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namespace physx
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{
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#endif
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/**
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\brief Enum with flag values to be used in PxSimpleTriangleMesh::flags.
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*/
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struct PxMeshFlag
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{
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enum Enum
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{
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/**
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\brief Specifies if the SDK should flip normals.
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The Nx libraries assume that the face normal of a triangle with vertices [a,b,c] can be computed as:
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edge1 = b-a
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edge2 = c-a
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face_normal = edge1 x edge2.
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Note: This is the same as a counterclockwise winding in a right handed coordinate system or
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alternatively a clockwise winding order in a left handed coordinate system.
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If this does not match the winding order for your triangles, raise the below flag.
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*/
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eFLIPNORMALS = (1<<0),
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e16_BIT_INDICES = (1<<1), //<! Denotes the use of 16-bit vertex indices
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};
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};
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/**
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\brief collection of set bits defined in PxMeshFlag.
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@see PxMeshFlag
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*/
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typedef PxFlags<PxMeshFlag::Enum,PxU16> PxMeshFlags;
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PX_FLAGS_OPERATORS(PxMeshFlag::Enum,PxU16);
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/**
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\brief A structure describing a triangle mesh.
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*/
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class PxSimpleTriangleMesh
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{
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public:
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/**
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\brief Pointer to first vertex point.
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*/
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PxBoundedData points;
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/**
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\brief Pointer to first triangle.
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Caller may add triangleStrideBytes bytes to the pointer to access the next triangle.
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These are triplets of 0 based indices:
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vert0 vert1 vert2
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vert0 vert1 vert2
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vert0 vert1 vert2
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...
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where vertex is either a 32 or 16 bit unsigned integer. There are numTriangles*3 indices.
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This is declared as a void pointer because it is actually either an PxU16 or a PxU32 pointer.
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*/
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PxBoundedData triangles;
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/**
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\brief Flags bits, combined from values of the enum ::PxMeshFlag
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*/
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PxMeshFlags flags;
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/**
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\brief constructor sets to default.
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*/
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PX_INLINE PxSimpleTriangleMesh();
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/**
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\brief (re)sets the structure to the default.
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*/
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PX_INLINE void setToDefault();
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/**
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\brief returns true if the current settings are valid
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*/
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PX_INLINE bool isValid() const;
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};
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PX_INLINE PxSimpleTriangleMesh::PxSimpleTriangleMesh()
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{
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}
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PX_INLINE void PxSimpleTriangleMesh::setToDefault()
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{
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*this = PxSimpleTriangleMesh();
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}
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PX_INLINE bool PxSimpleTriangleMesh::isValid() const
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{
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// Check geometry
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if(points.count > 0xffff && flags & PxMeshFlag::e16_BIT_INDICES)
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return false;
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if(!points.data)
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return false;
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if(points.stride < sizeof(PxVec3)) //should be at least one point's worth of data
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return false;
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// Check topology
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// The triangles pointer is not mandatory
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if(triangles.data)
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{
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// Indexed mesh
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PxU32 limit = (flags & PxMeshFlag::e16_BIT_INDICES) ? sizeof(PxU16)*3 : sizeof(PxU32)*3;
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if(triangles.stride < limit)
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return false;
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}
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return true;
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}
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#ifndef PX_DOXYGEN
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} // namespace physx
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#endif
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/** @} */
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#endif
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