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physx/snippets/snippetvehiclecommon/SnippetVehicleTireFriction.cpp

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+//
+// 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) 2008-2021 NVIDIA Corporation. All rights reserved.
+// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  
+
+#include <new>
+#include "SnippetVehicleTireFriction.h"
+#include "PxPhysicsAPI.h"
+
+namespace snippetvehicle
+{
+
+using namespace physx;
+
+//Tire model friction for each combination of drivable surface type and tire type.
+static PxF32 gTireFrictionMultipliers[MAX_NUM_SURFACE_TYPES][MAX_NUM_TIRE_TYPES]=
+{
+	//NORMAL,	WORN
+	{1.00f,		0.1f}//TARMAC
+};
+
+PxVehicleDrivableSurfaceToTireFrictionPairs* createFrictionPairs(const PxMaterial* defaultMaterial)
+{
+	PxVehicleDrivableSurfaceType surfaceTypes[1];
+	surfaceTypes[0].mType = SURFACE_TYPE_TARMAC;
+
+	const PxMaterial* surfaceMaterials[1];
+	surfaceMaterials[0] = defaultMaterial;
+
+	PxVehicleDrivableSurfaceToTireFrictionPairs* surfaceTirePairs =
+		PxVehicleDrivableSurfaceToTireFrictionPairs::allocate(MAX_NUM_TIRE_TYPES,MAX_NUM_SURFACE_TYPES);
+
+	surfaceTirePairs->setup(MAX_NUM_TIRE_TYPES, MAX_NUM_SURFACE_TYPES, surfaceMaterials, surfaceTypes);
+
+	for(PxU32 i = 0; i < MAX_NUM_SURFACE_TYPES; i++)
+	{
+		for(PxU32 j = 0; j < MAX_NUM_TIRE_TYPES; j++)
+		{
+			surfaceTirePairs->setTypePairFriction(i,j,gTireFrictionMultipliers[i][j]);
+		}
+	}
+	return surfaceTirePairs;
+}
+
+} // namespace snippetvehicle