165 lines
4.7 KiB
C++
165 lines
4.7 KiB
C++
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions
|
|
// are met:
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above copyright
|
|
// notice, this list of conditions and the following disclaimer in the
|
|
// documentation and/or other materials provided with the distribution.
|
|
// * Neither the name of NVIDIA CORPORATION nor the names of its
|
|
// contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
|
|
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
|
|
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
// Copyright (c) 2008-2023 NVIDIA Corporation. All rights reserved.
|
|
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
|
|
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
|
|
|
|
#ifndef PX_SIMPLE_TRIANGLE_MESH_H
|
|
#define PX_SIMPLE_TRIANGLE_MESH_H
|
|
/** \addtogroup geomutils
|
|
@{
|
|
*/
|
|
|
|
#include "foundation/PxVec3.h"
|
|
#include "foundation/PxFlags.h"
|
|
#include "common/PxCoreUtilityTypes.h"
|
|
#include "common/PxPhysXCommonConfig.h"
|
|
|
|
#if !PX_DOXYGEN
|
|
namespace physx
|
|
{
|
|
#endif
|
|
|
|
/**
|
|
\brief Enum with flag values to be used in PxSimpleTriangleMesh::flags.
|
|
*/
|
|
struct PxMeshFlag
|
|
{
|
|
enum Enum
|
|
{
|
|
/**
|
|
\brief Specifies if the SDK should flip normals.
|
|
|
|
The PhysX libraries assume that the face normal of a triangle with vertices [a,b,c] can be computed as:
|
|
edge1 = b-a
|
|
edge2 = c-a
|
|
face_normal = edge1 x edge2.
|
|
|
|
Note: This is the same as a counterclockwise winding in a right handed coordinate system or
|
|
alternatively a clockwise winding order in a left handed coordinate system.
|
|
|
|
If this does not match the winding order for your triangles, raise the below flag.
|
|
*/
|
|
eFLIPNORMALS = (1<<0),
|
|
e16_BIT_INDICES = (1<<1) //!< Denotes the use of 16-bit vertex indices
|
|
};
|
|
};
|
|
|
|
/**
|
|
\brief collection of set bits defined in PxMeshFlag.
|
|
|
|
@see PxMeshFlag
|
|
*/
|
|
typedef PxFlags<PxMeshFlag::Enum,PxU16> PxMeshFlags;
|
|
PX_FLAGS_OPERATORS(PxMeshFlag::Enum,PxU16)
|
|
|
|
|
|
/**
|
|
\brief A structure describing a triangle mesh.
|
|
*/
|
|
class PxSimpleTriangleMesh
|
|
{
|
|
public:
|
|
|
|
/**
|
|
\brief Pointer to first vertex point.
|
|
*/
|
|
PxBoundedData points;
|
|
|
|
/**
|
|
\brief Pointer to first triangle.
|
|
|
|
Caller may add triangleStrideBytes bytes to the pointer to access the next triangle.
|
|
|
|
These are triplets of 0 based indices:
|
|
vert0 vert1 vert2
|
|
vert0 vert1 vert2
|
|
vert0 vert1 vert2
|
|
...
|
|
|
|
where vertex is either a 32 or 16 bit unsigned integer. There are numTriangles*3 indices.
|
|
|
|
This is declared as a void pointer because it is actually either an PxU16 or a PxU32 pointer.
|
|
*/
|
|
PxBoundedData triangles;
|
|
|
|
/**
|
|
\brief Flags bits, combined from values of the enum ::PxMeshFlag
|
|
*/
|
|
PxMeshFlags flags;
|
|
|
|
/**
|
|
\brief constructor sets to default.
|
|
*/
|
|
PX_INLINE PxSimpleTriangleMesh();
|
|
/**
|
|
\brief (re)sets the structure to the default.
|
|
*/
|
|
PX_INLINE void setToDefault();
|
|
/**
|
|
\brief returns true if the current settings are valid
|
|
*/
|
|
PX_INLINE bool isValid() const;
|
|
};
|
|
|
|
|
|
PX_INLINE PxSimpleTriangleMesh::PxSimpleTriangleMesh()
|
|
{
|
|
}
|
|
|
|
PX_INLINE void PxSimpleTriangleMesh::setToDefault()
|
|
{
|
|
*this = PxSimpleTriangleMesh();
|
|
}
|
|
|
|
PX_INLINE bool PxSimpleTriangleMesh::isValid() const
|
|
{
|
|
// Check geometry
|
|
if(points.count > 0xffff && flags & PxMeshFlag::e16_BIT_INDICES)
|
|
return false;
|
|
if(!points.data)
|
|
return false;
|
|
if(points.stride < sizeof(PxVec3)) //should be at least one point's worth of data
|
|
return false;
|
|
|
|
// Check topology
|
|
// The triangles pointer is not mandatory
|
|
if(triangles.data)
|
|
{
|
|
// Indexed mesh
|
|
PxU32 limit = (flags & PxMeshFlag::e16_BIT_INDICES) ? sizeof(PxU16)*3 : sizeof(PxU32)*3;
|
|
if(triangles.stride < limit)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#if !PX_DOXYGEN
|
|
} // namespace physx
|
|
#endif
|
|
|
|
/** @} */
|
|
#endif
|