PxHeightFieldGeometry.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_NX_HEIGHTFIELD_GEOMETRY
#define PX_PHYSICS_NX_HEIGHTFIELD_GEOMETRY

#include "geometry/PxTriangleMeshGeometry.h"
#include "common/PxCoreUtilityTypes.h"

#ifndef PX_DOXYGEN
namespace physx
{
#endif

#define PX_MIN_HEIGHTFIELD_XZ_SCALE 1e-8f
#define PX_MIN_HEIGHTFIELD_Y_SCALE (0.0001f / PxReal(0xFFFF))

class PxHeightField;

class PxHeightFieldGeometry : public PxGeometry 
{
public:
    PX_INLINE PxHeightFieldGeometry() :     
        PxGeometry      (PxGeometryType::eHEIGHTFIELD),
        heightField     (NULL),
        heightScale     (1.0f), 
        rowScale        (1.0f), 
        columnScale     (1.0f), 
        heightFieldFlags(0)
    {}

    PX_INLINE PxHeightFieldGeometry(PxHeightField* hf,
                                    PxMeshGeometryFlags flags, 
                                    PxReal heightScale_,
                                    PxReal rowScale_, 
                                    PxReal columnScale_) :
        PxGeometry          (PxGeometryType::eHEIGHTFIELD), 
        heightField         (hf) ,
        heightScale         (heightScale_), 
        rowScale            (rowScale_), 
        columnScale         (columnScale_), 
        heightFieldFlags    (flags)
        {
        }

    PX_INLINE bool isValid() const;

public:
    PxHeightField*          heightField;

    PxReal                  heightScale;

    PxReal                  rowScale;

    PxReal                  columnScale;

    PxMeshGeometryFlags     heightFieldFlags;

    PxPadding<3>            paddingFromFlags;   //< padding for mesh flags.
};


PX_INLINE bool PxHeightFieldGeometry::isValid() const
{
    if (mType != PxGeometryType::eHEIGHTFIELD)
        return false;
    if (!PxIsFinite(heightScale) || !PxIsFinite(rowScale) || !PxIsFinite(columnScale))
        return false;
    if (rowScale < PX_MIN_HEIGHTFIELD_XZ_SCALE || columnScale < PX_MIN_HEIGHTFIELD_XZ_SCALE || heightScale < PX_MIN_HEIGHTFIELD_Y_SCALE)
        return false;
    if (!heightField)
        return false;

    return true;
}

#ifndef PX_DOXYGEN
} // namespace physx
#endif

#endif