GuGeometryChecks.h

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#ifndef GU_GEOMETRY_CHECKS_H
#define GU_GEOMETRY_CHECKS_H
 
#include "geometry/PxBoxGeometry.h"
#include "geometry/PxSphereGeometry.h"
#include "geometry/PxCapsuleGeometry.h"
#include "geometry/PxPlaneGeometry.h"
#include "geometry/PxConvexMeshGeometry.h"
#include "geometry/PxParticleSystemGeometry.h"
#include "geometry/PxTetrahedronMeshGeometry.h"
#include "geometry/PxTriangleMeshGeometry.h"
#include "geometry/PxHeightFieldGeometry.h"
#include "geometry/PxHairSystemGeometry.h"
#include "geometry/PxCustomGeometry.h"
 
namespace physx
{
 
    // We sometimes overload capsule code for spheres, so every sphere should have 
    // valid capsule data (height = 0). This is preferable to a typedef so that we
    // can maintain traits separately for a sphere, but some care is required to deal
    // with the fact that when a reference to a capsule is extracted, it may have its
    // type field set to eSPHERE
 
    template <typename T>
    struct PxcGeometryTraits
    {
        enum {TypeID = PxGeometryType::eINVALID };
    };
    template <typename T> struct PxcGeometryTraits<const T> { enum { TypeID = PxcGeometryTraits<T>::TypeID }; };
 
    template <> struct PxcGeometryTraits<PxBoxGeometry>                 { enum { TypeID = PxGeometryType::eBOX }; };
    template <> struct PxcGeometryTraits<PxSphereGeometry>              { enum { TypeID = PxGeometryType::eSPHERE }; };
    template <> struct PxcGeometryTraits<PxCapsuleGeometry>             { enum { TypeID = PxGeometryType::eCAPSULE }; };
    template <> struct PxcGeometryTraits<PxPlaneGeometry>               { enum { TypeID = PxGeometryType::ePLANE }; };
    template <> struct PxcGeometryTraits<PxParticleSystemGeometry>      { enum { TypeID = PxGeometryType::ePARTICLESYSTEM}; };
    template <> struct PxcGeometryTraits<PxConvexMeshGeometry>          { enum { TypeID = PxGeometryType::eCONVEXMESH }; };
    template <> struct PxcGeometryTraits<PxTriangleMeshGeometry>        { enum { TypeID = PxGeometryType::eTRIANGLEMESH }; };
    template <> struct PxcGeometryTraits<PxTetrahedronMeshGeometry>     { enum { TypeID = PxGeometryType::eTETRAHEDRONMESH }; };
    template <> struct PxcGeometryTraits<PxHeightFieldGeometry>         { enum { TypeID = PxGeometryType::eHEIGHTFIELD }; };
    template <> struct PxcGeometryTraits<PxHairSystemGeometry>          { enum { TypeID = PxGeometryType::eHAIRSYSTEM }; };
    template <> struct PxcGeometryTraits<PxCustomGeometry>              { enum { TypeID = PxGeometryType::eCUSTOM }; };
 
    template<class T> PX_CUDA_CALLABLE PX_FORCE_INLINE void checkType(const PxGeometry& geometry)
    {
        PX_ASSERT(PxU32(geometry.getType()) == PxU32(PxcGeometryTraits<T>::TypeID));
        PX_UNUSED(geometry);
    }
 
    template<> PX_CUDA_CALLABLE PX_FORCE_INLINE void checkType<PxCapsuleGeometry>(const PxGeometry& geometry)
    {
        PX_ASSERT(geometry.getType() == PxGeometryType::eCAPSULE || geometry.getType() == PxGeometryType::eSPHERE);
        PX_UNUSED(geometry);
    }
 
    template<> PX_CUDA_CALLABLE PX_FORCE_INLINE void checkType<const PxCapsuleGeometry>(const PxGeometry& geometry)
    {
        PX_ASSERT(geometry.getType()== PxGeometryType::eCAPSULE || geometry.getType() == PxGeometryType::eSPHERE);
        PX_UNUSED(geometry);
    }
}
 
// the shape structure relies on punning capsules and spheres 
PX_COMPILE_TIME_ASSERT(PX_OFFSET_OF(physx::PxCapsuleGeometry, radius) == PX_OFFSET_OF(physx::PxSphereGeometry, radius));
 
#endif