PxGeometryHelpers.h

// 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) 2008-2022 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_GEOMETRY_HELPERS_H
#define PX_GEOMETRY_HELPERS_H
#include "foundation/PxPlane.h"
#include "foundation/PxTransform.h"
#include "foundation/PxUnionCast.h"
#include "common/PxPhysXCommonConfig.h"
#include "geometry/PxGeometry.h"
#include "geometry/PxBoxGeometry.h"
#include "geometry/PxSphereGeometry.h"
#include "geometry/PxCapsuleGeometry.h"
#include "geometry/PxPlaneGeometry.h"
#include "geometry/PxConvexMeshGeometry.h"
#include "geometry/PxHeightFieldGeometry.h"
#include "geometry/PxParticleSystemGeometry.h"
#include "geometry/PxHairSystemGeometry.h"
#include "geometry/PxTetrahedronMeshGeometry.h"
#include "geometry/PxCustomGeometry.h"
 
#if !PX_DOXYGEN
namespace physx
{
#endif
 
PX_ALIGN_PREFIX(4)
class PxGeometryHolder
{
    class PxInvalidGeometry : public PxGeometry 
    {
    public:
        PX_INLINE PxInvalidGeometry() : PxGeometry(PxGeometryType::eINVALID)    {}
    };
 
public:
    PX_FORCE_INLINE PxGeometryType::Enum getType() const
    {
        return any().getType();
    }
 
    PX_FORCE_INLINE PxGeometry& any()
    {
        return *PxUnionCast<PxGeometry*>(&bytes.geometry);
    }
 
    PX_FORCE_INLINE const PxGeometry&   any()   const
    {
        return *PxUnionCast<const PxGeometry*>(&bytes.geometry);
    }
 
    PX_FORCE_INLINE PxSphereGeometry&                   sphere()                { return get<PxSphereGeometry, PxGeometryType::eSPHERE>();                          }
    PX_FORCE_INLINE const PxSphereGeometry&             sphere()        const   { return get<const PxSphereGeometry, PxGeometryType::eSPHERE>();                    }
 
    PX_FORCE_INLINE PxPlaneGeometry&                    plane()                 { return get<PxPlaneGeometry, PxGeometryType::ePLANE>();                            }
    PX_FORCE_INLINE const PxPlaneGeometry&              plane()         const   { return get<const PxPlaneGeometry, PxGeometryType::ePLANE>();                      }
 
    PX_FORCE_INLINE PxCapsuleGeometry&                  capsule()               { return get<PxCapsuleGeometry, PxGeometryType::eCAPSULE>();                        }
    PX_FORCE_INLINE const PxCapsuleGeometry&            capsule()       const   { return get<const PxCapsuleGeometry, PxGeometryType::eCAPSULE>();                  }
 
    PX_FORCE_INLINE PxBoxGeometry&                      box()                   { return get<PxBoxGeometry, PxGeometryType::eBOX>();                                }
    PX_FORCE_INLINE const PxBoxGeometry&                box()           const   { return get<const PxBoxGeometry, PxGeometryType::eBOX>();                          }
 
    PX_FORCE_INLINE PxConvexMeshGeometry&               convexMesh()            { return get<PxConvexMeshGeometry, PxGeometryType::eCONVEXMESH>();                  }
    PX_FORCE_INLINE const PxConvexMeshGeometry&         convexMesh()    const   { return get<const PxConvexMeshGeometry, PxGeometryType::eCONVEXMESH>();            }
 
    PX_FORCE_INLINE PxTetrahedronMeshGeometry&          tetMesh()               { return get<PxTetrahedronMeshGeometry, PxGeometryType::eTETRAHEDRONMESH>();        }
    PX_FORCE_INLINE const PxTetrahedronMeshGeometry&    tetMesh()       const   { return get<const PxTetrahedronMeshGeometry, PxGeometryType::eTETRAHEDRONMESH>();  }
 
    PX_FORCE_INLINE PxTriangleMeshGeometry&             triangleMesh()          { return get<PxTriangleMeshGeometry, PxGeometryType::eTRIANGLEMESH>();              }
    PX_FORCE_INLINE const PxTriangleMeshGeometry&       triangleMesh()  const   { return get<const PxTriangleMeshGeometry, PxGeometryType::eTRIANGLEMESH>();        }
 
    PX_FORCE_INLINE PxHeightFieldGeometry&              heightField()           { return get<PxHeightFieldGeometry, PxGeometryType::eHEIGHTFIELD>();                }
    PX_FORCE_INLINE const PxHeightFieldGeometry&        heightField()   const   { return get<const PxHeightFieldGeometry, PxGeometryType::eHEIGHTFIELD>();          }
 
    PX_FORCE_INLINE PxParticleSystemGeometry&           particleSystem()        { return get<PxParticleSystemGeometry, PxGeometryType::ePARTICLESYSTEM>();          }
    PX_FORCE_INLINE const PxParticleSystemGeometry&     particleSystem() const  { return get<const PxParticleSystemGeometry, PxGeometryType::ePARTICLESYSTEM>();    }
 
    PX_FORCE_INLINE PxHairSystemGeometry&               hairSystem()            { return get<PxHairSystemGeometry, PxGeometryType::eHAIRSYSTEM>();                  }
    PX_FORCE_INLINE const PxHairSystemGeometry&         hairSystem()    const   { return get<const PxHairSystemGeometry, PxGeometryType::eHAIRSYSTEM>();            }
 
    PX_FORCE_INLINE PxCustomGeometry&                   custom()                { return get<PxCustomGeometry, PxGeometryType::eCUSTOM>();                          }
    PX_FORCE_INLINE const PxCustomGeometry&             custom()        const   { return get<const PxCustomGeometry, PxGeometryType::eCUSTOM>();                    }
 
    PX_FORCE_INLINE void storeAny(const PxGeometry& geometry)
    {
        PX_ASSERT_WITH_MESSAGE( (geometry.getType() >= PxGeometryType::eSPHERE) &&
                                (geometry.getType() < PxGeometryType::eGEOMETRY_COUNT),
                                "Unexpected GeometryType in PxGeometryHolder::storeAny");
 
        switch(geometry.getType())
        {
        case PxGeometryType::eSPHERE:           put<PxSphereGeometry>(geometry);            break;
        case PxGeometryType::ePLANE:            put<PxPlaneGeometry>(geometry);             break;
        case PxGeometryType::eCAPSULE:          put<PxCapsuleGeometry>(geometry);           break;
        case PxGeometryType::eBOX:              put<PxBoxGeometry>(geometry);               break;
        case PxGeometryType::eCONVEXMESH:       put<PxConvexMeshGeometry>(geometry);        break;
        case PxGeometryType::eTRIANGLEMESH:     put<PxTriangleMeshGeometry>(geometry);      break;
        case PxGeometryType::eTETRAHEDRONMESH:  put<PxTetrahedronMeshGeometry>(geometry);   break;
        case PxGeometryType::eHEIGHTFIELD:      put<PxHeightFieldGeometry>(geometry);       break;
        case PxGeometryType::ePARTICLESYSTEM:   put<PxParticleSystemGeometry>(geometry);    break;
        case PxGeometryType::eHAIRSYSTEM:       put<PxHairSystemGeometry>(geometry);        break;
        case PxGeometryType::eCUSTOM:           put<PxCustomGeometry>(geometry);            break;
        case PxGeometryType::eGEOMETRY_COUNT:
        case PxGeometryType::eINVALID:                                                      break;
        }
    }
 
    PX_FORCE_INLINE PxGeometryHolder()                          { put<PxInvalidGeometry>(PxInvalidGeometry());  }
    PX_FORCE_INLINE PxGeometryHolder(const PxGeometry& geometry){ storeAny(geometry);                           }
 
    private:
        template<typename T> void put(const PxGeometry& geometry)
        {
            static_cast<T&>(any()) = static_cast<const T&>(geometry);
        }
 
        template<typename T, PxGeometryType::Enum type> T& get()
        {
            PX_ASSERT(getType() == type);
            return static_cast<T&>(any());
        }
 
        template<typename T, PxGeometryType::Enum type> T& get() const
        {
            PX_ASSERT(getType() == type);
            return static_cast<T&>(any());
        }
 
    union {
        PxU8    geometry[sizeof(PxGeometry)];
        PxU8    box[sizeof(PxBoxGeometry)];
        PxU8    sphere[sizeof(PxSphereGeometry)];
        PxU8    capsule[sizeof(PxCapsuleGeometry)];
        PxU8    plane[sizeof(PxPlaneGeometry)];
        PxU8    convex[sizeof(PxConvexMeshGeometry)];
        PxU8    tetMesh[sizeof(PxTetrahedronMeshGeometry)];
        PxU8    mesh[sizeof(PxTriangleMeshGeometry)];
        PxU8    heightfield[sizeof(PxHeightFieldGeometry)];
        PxU8    particleSystem[sizeof(PxParticleSystemGeometry)];
        PxU8    hairSystem[sizeof(PxHairSystemGeometry)];
        PxU8    custom[sizeof(PxCustomGeometry)];
    } bytes;
}
PX_ALIGN_SUFFIX(4);
 
#if !PX_DOXYGEN
} // namespace physx
#endif
 
#endif