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00020 // or patent rights of NVIDIA Corporation. Details are subject to change without notice.
00021 // This code supersedes and replaces all information previously supplied.
00022 // NVIDIA Corporation products are not authorized for use as critical
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00025 //
00026 // Copyright (c) 2008-2012 NVIDIA Corporation. All rights reserved.
00027 // Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
00028 // Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  
00029 
00030 
00031 #ifndef PX_PHYSICS_NX_HEIGHTFIELD_GEOMETRY
00032 #define PX_PHYSICS_NX_HEIGHTFIELD_GEOMETRY
00033 
00036 #include "geometry/PxTriangleMeshGeometry.h"
00037 #include "common/PxCoreUtilityTypes.h"
00038 
00039 #ifndef PX_DOXYGEN
00040 namespace physx
00041 {
00042 #endif
00043 
00044 #define PX_MIN_HEIGHTFIELD_XZ_SCALE 1e-8f
00045 #define PX_MIN_HEIGHTFIELD_Y_SCALE (0.0001f / PxReal(0xFFFF))
00046 
00047 class PxHeightField;
00048 
00057 class PxHeightFieldGeometry : public PxGeometry 
00058 {
00059 public:
00060     PX_INLINE PxHeightFieldGeometry() :     
00061         PxGeometry(PxGeometryType::eHEIGHTFIELD),
00062         heightField(NULL),
00063         heightScale(1.0f), 
00064         rowScale(1.0f), 
00065         columnScale(1.0f), 
00066         heightFieldFlags(0)
00067     {}
00068 
00069     PX_INLINE PxHeightFieldGeometry(PxHeightField* hf,
00070                                     PxMeshGeometryFlags flags, 
00071                                     PxReal heightscale,
00072                                     PxReal rowscale, 
00073                                     PxReal columnscale) :
00074         PxGeometry          (PxGeometryType::eHEIGHTFIELD), 
00075         heightField         (hf) ,
00076         heightScale         (heightscale), 
00077         rowScale            (rowscale), 
00078         columnScale         (columnscale), 
00079         heightFieldFlags    (flags)
00080         {
00081         }
00082 
00088     PX_INLINE bool isValid() const;
00089 
00090 public:
00094     PxHeightField*          heightField;
00095 
00099     PxReal                  heightScale;
00100 
00104     PxReal                  rowScale;
00105 
00109     PxReal                  columnScale;
00110 
00114     PxMeshGeometryFlags     heightFieldFlags;
00115 
00116     PxPadding<3>            paddingFromFlags;   //< padding for mesh flags.
00117 };
00118 
00119 
00120 PX_INLINE bool PxHeightFieldGeometry::isValid() const
00121 {
00122     if (mType != PxGeometryType::eHEIGHTFIELD)
00123         return false;
00124     if (!PxIsFinite(heightScale) || !PxIsFinite(rowScale) || !PxIsFinite(columnScale))
00125         return false;
00126     if (rowScale < PX_MIN_HEIGHTFIELD_XZ_SCALE || columnScale < PX_MIN_HEIGHTFIELD_XZ_SCALE || heightScale < PX_MIN_HEIGHTFIELD_Y_SCALE)
00127         return false;
00128     if (!heightField)
00129         return false;
00130 
00131     return true;
00132 }
00133 
00134 #ifndef PX_DOXYGEN
00135 } // namespace physx
00136 #endif
00137 
00139 #endif