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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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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 #ifndef PX_VEHICLE_TIREFRICTION_H
00031 #define PX_VEHICLE_TIREFRICTION_H
00032 
00036 #include "foundation/PxSimpleTypes.h"
00037 
00038 #ifndef PX_DOXYGEN
00039 namespace physx
00040 {
00041 #endif
00042 
00043 class PxMaterial;
00044 
00050 struct PxVehicleDrivableSurfaceType
00051 {
00052     enum
00053     {
00054         eSURFACE_TYPE_UNKNOWN=0xffffffff
00055     };
00056     PxU32 mType;
00057 };
00058 
00062 class PxVehicleDrivableSurfaceToTireFrictionPairs
00063 {
00064 public:
00065 
00066     friend class VehicleSurfaceTypeHashTable;
00067 
00068     enum
00069     {
00070         eMAX_NUM_SURFACE_TYPES=256
00071     };
00072 
00081     static PxVehicleDrivableSurfaceToTireFrictionPairs* create
00082         (const PxU32 maxNumTireTypes, const PxU32 maxNumSurfaceTypes, 
00083          const PxMaterial** drivableSurfaceMaterials, const PxVehicleDrivableSurfaceType* drivableSurfaceTypes);
00084 
00088     void release();
00089 
00093     void setTypePairFriction(const PxU32 surfaceType, const PxU32 tireType, const PxReal value);
00094 
00098     PxReal getTypePairFriction(const PxU32 surfaceType, const PxU32 tireType) const;
00099 
00100 private:
00101 
00107     PxReal* mPairs;                 
00108 
00117     const PxMaterial** mDrivableSurfaceMaterials;
00118 
00127     PxVehicleDrivableSurfaceType* mDrivableSurfaceTypes;
00128 
00134     PxU32 mNumSurfaceTypes;         
00135 
00141     PxU32 mNumTireTypes;            
00142 
00143     PxVehicleDrivableSurfaceToTireFrictionPairs(){}
00144     ~PxVehicleDrivableSurfaceToTireFrictionPairs(){}
00145 
00146 #ifndef PX_X64
00147     PxU32 mPad[3];
00148 #endif
00149 };
00150 PX_COMPILE_TIME_ASSERT(0==(sizeof(PxVehicleDrivableSurfaceToTireFrictionPairs) & 15));
00151 
00152 #ifndef PX_DOXYGEN
00153 } // namespace physx
00154 #endif
00155 
00157 #endif //PX_VEHICLE_TIREFRICTION_H