PxSimpleTriangleMesh.h

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/*
 * Copyright (c) 2008-2015, NVIDIA CORPORATION.  All rights reserved.
 *
 * NVIDIA CORPORATION and its licensors retain all intellectual property
 * and proprietary rights in and to this software, related documentation
 * and any modifications thereto.  Any use, reproduction, disclosure or
 * distribution of this software and related documentation without an express
 * license agreement from NVIDIA CORPORATION is strictly prohibited.
 */
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  


#ifndef PX_PHYSICS_GEOMUTILS_NX_SIMPLETRIANGLEMESH
#define PX_PHYSICS_GEOMUTILS_NX_SIMPLETRIANGLEMESH

#include "foundation/PxVec3.h"
#include "foundation/PxFlags.h"
#include "common/PxCoreUtilityTypes.h"
#include "common/PxPhysXCommonConfig.h"

#ifndef PX_DOXYGEN
namespace physx
{
#endif

struct PxMeshFlag
{
    enum Enum
    {
        eFLIPNORMALS        =   (1<<0),
        e16_BIT_INDICES     =   (1<<1)  //<! Denotes the use of 16-bit vertex indices
    };
};

typedef PxFlags<PxMeshFlag::Enum,PxU16> PxMeshFlags;
PX_FLAGS_OPERATORS(PxMeshFlag::Enum,PxU16)



class PxSimpleTriangleMesh
{
public:

    PxBoundedData points;

    PxBoundedData triangles;

    PxMeshFlags flags;

    PX_INLINE PxSimpleTriangleMesh();   
    PX_INLINE void setToDefault();
    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;
}

#ifndef PX_DOXYGEN
} // namespace physx
#endif

#endif