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<title>NVIDIA(R) PhysX(R) SDK 3.4 API Reference: PxVehicleTireData Class Reference</title>
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<h1>PxVehicleTireData Class Reference<br>
<small>
[<a class="el" href="group__vehicle.html">Vehicle</a>]</small>
</h1><!-- doxytag: class="PxVehicleTireData" --><code>#include <<a class="el" href="PxVehicleComponents_8h-source.html">PxVehicleComponents.h</a>></code>
<p>
<p>
<a href="classPxVehicleTireData-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#4f7cde0fb3943e130fe35a786f649d1d">PxVehicleTireData</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PX_FORCE_INLINE PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#de0259eb242f4e9e687fbd29d59d1ee1">getRecipLongitudinalStiffnessPerUnitGravity</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return Cached value of 1.0/mLongitudinalStiffnessPerUnitGravity. <a href="#de0259eb242f4e9e687fbd29d59d1ee1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PX_FORCE_INLINE PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#80027d305819f6805bf73eb47d5b9be7">getFrictionVsSlipGraphRecipx1Minusx0</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return Cached value of 1.0f/(mFrictionVsSlipGraph[1][0]-mFrictionVsSlipGraph[0][0]). <a href="#80027d305819f6805bf73eb47d5b9be7"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PX_FORCE_INLINE PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#f317498c9bf064a14e1856288280e145">getFrictionVsSlipGraphRecipx2Minusx1</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return Cached value of 1.0f/(mFrictionVsSlipGraph[2][0]-mFrictionVsSlipGraph[1][0]). <a href="#f317498c9bf064a14e1856288280e145"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Public Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#d52ba7c872280fd9a52e728a052fc7ff">mLatStiffX</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Tire lateral stiffness is a graph of tire load that has linear behavior near zero load and flattens at large loads. mLatStiffX describes the minimum normalized load (load/restLoad) that gives a flat lateral stiffness response to load. <a href="#d52ba7c872280fd9a52e728a052fc7ff"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#d2fa139cdff425babbf332384478a857">mLatStiffY</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Tire lateral stiffness is a graph of tire load that has linear behavior near zero load and flattens at large loads. mLatStiffY describes the maximum possible value of lateralStiffness/restLoad that occurs when (load/restLoad)>= mLatStiffX. <a href="#d2fa139cdff425babbf332384478a857"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#92083c9b5fbf957e4d4c54ab566b5457">mLongitudinalStiffnessPerUnitGravity</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Tire Longitudinal stiffness per unit gravitational acceleration. <a href="#92083c9b5fbf957e4d4c54ab566b5457"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#d279199240b57e9d20ad48a610ffa4b4">mCamberStiffnessPerUnitGravity</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">tire Tire camber stiffness per unity gravitational acceleration. <a href="#d279199240b57e9d20ad48a610ffa4b4"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#ab2bbd4b293db8fb9b94f310a59176a2">mFrictionVsSlipGraph</a> [3][2]</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Graph of friction vs longitudinal slip with 3 points. <a href="#ab2bbd4b293db8fb9b94f310a59176a2"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__foundation.html#gcce5749db3dcfb916e98c253374264ed">PxU32</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#8a9469d1683718ba3e5a2d2632dd9218">mType</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Tire type denoting slicks, wets, snow, winter, summer, all-terrain, mud etc. <a href="#8a9469d1683718ba3e5a2d2632dd9218"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Private Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#04a41f34edbf9a5bc42cc495684ca841">isValid</a> () const </td></tr>
<tr><td colspan="2"><br><h2>Private Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#8b459e357483c7ee86304cc1280c2d2d">mRecipLongitudinalStiffnessPerUnitGravity</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Cached value of 1.0/mLongitudinalStiffnessPerUnitGravity. <a href="#8b459e357483c7ee86304cc1280c2d2d"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#72bc73620f4d6265cf51869439574d3c">mFrictionVsSlipGraphRecipx1Minusx0</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Cached value of 1.0f/(mFrictionVsSlipGraph[1][0]-mFrictionVsSlipGraph[0][0]). <a href="#72bc73620f4d6265cf51869439574d3c"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#5a2f35b2a0e3e225e13c62f6d4c588d6">mFrictionVsSlipGraphRecipx2Minusx1</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Cached value of 1.0f/(mFrictionVsSlipGraph[2][0]-mFrictionVsSlipGraph[1][0]). <a href="#5a2f35b2a0e3e225e13c62f6d4c588d6"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">PxReal </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#0b498753b7cf6afa6f0d507413dcb629">mPad</a> [2]</td></tr>
<tr><td colspan="2"><br><h2>Friends</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classPxVehicleTireData.html#4c2a2bf5a268389976a6f3c6ffeb1806">PxVehicleWheels4SimData</a></td></tr>
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<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="4f7cde0fb3943e130fe35a786f649d1d"></a><!-- doxytag: member="PxVehicleTireData::PxVehicleTireData" ref="4f7cde0fb3943e130fe35a786f649d1d" args="()" -->
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<td class="memname">PxVehicleTireData::PxVehicleTireData </td>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="80027d305819f6805bf73eb47d5b9be7"></a><!-- doxytag: member="PxVehicleTireData::getFrictionVsSlipGraphRecipx1Minusx0" ref="80027d305819f6805bf73eb47d5b9be7" args="() const " -->
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<td class="memname">PX_FORCE_INLINE PxReal PxVehicleTireData::getFrictionVsSlipGraphRecipx1Minusx0 </td>
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Return Cached value of 1.0f/(mFrictionVsSlipGraph[1][0]-mFrictionVsSlipGraph[0][0]).
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<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classPxVehicleWheelsSimData.html#cfc01818dd853e393bf3d9ea4370441c" title="Set the tire data of the idth wheel.">PxVehicleWheelsSimData::setTireData</a> </dd></dl>
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<a class="anchor" name="f317498c9bf064a14e1856288280e145"></a><!-- doxytag: member="PxVehicleTireData::getFrictionVsSlipGraphRecipx2Minusx1" ref="f317498c9bf064a14e1856288280e145" args="() const " -->
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<td class="memname">PX_FORCE_INLINE PxReal PxVehicleTireData::getFrictionVsSlipGraphRecipx2Minusx1 </td>
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Return Cached value of 1.0f/(mFrictionVsSlipGraph[2][0]-mFrictionVsSlipGraph[1][0]).
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classPxVehicleWheelsSimData.html#cfc01818dd853e393bf3d9ea4370441c" title="Set the tire data of the idth wheel.">PxVehicleWheelsSimData::setTireData</a> </dd></dl>
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<a class="anchor" name="de0259eb242f4e9e687fbd29d59d1ee1"></a><!-- doxytag: member="PxVehicleTireData::getRecipLongitudinalStiffnessPerUnitGravity" ref="de0259eb242f4e9e687fbd29d59d1ee1" args="() const " -->
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<td class="memname">PX_FORCE_INLINE PxReal PxVehicleTireData::getRecipLongitudinalStiffnessPerUnitGravity </td>
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Return Cached value of 1.0/mLongitudinalStiffnessPerUnitGravity.
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<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classPxVehicleWheelsSimData.html#cfc01818dd853e393bf3d9ea4370441c" title="Set the tire data of the idth wheel.">PxVehicleWheelsSimData::setTireData</a> </dd></dl>
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<a class="anchor" name="04a41f34edbf9a5bc42cc495684ca841"></a><!-- doxytag: member="PxVehicleTireData::isValid" ref="04a41f34edbf9a5bc42cc495684ca841" args="() const " -->
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<hr><h2>Friends And Related Function Documentation</h2>
<a class="anchor" name="4c2a2bf5a268389976a6f3c6ffeb1806"></a><!-- doxytag: member="PxVehicleTireData::PxVehicleWheels4SimData" ref="4c2a2bf5a268389976a6f3c6ffeb1806" args="" -->
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<td class="memname">friend class PxVehicleWheels4SimData<code> [friend]</code> </td>
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<hr><h2>Member Data Documentation</h2>
<a class="anchor" name="d279199240b57e9d20ad48a610ffa4b4"></a><!-- doxytag: member="PxVehicleTireData::mCamberStiffnessPerUnitGravity" ref="d279199240b57e9d20ad48a610ffa4b4" args="" -->
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<td class="memname">PxReal <a class="el" href="classPxVehicleTireData.html#d279199240b57e9d20ad48a610ffa4b4">PxVehicleTireData::mCamberStiffnessPerUnitGravity</a> </td>
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tire Tire camber stiffness per unity gravitational acceleration.
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<dl class="note" compact><dt><b>Note:</b></dt><dd>Camber stiffness of the tire is calculated as gravitationalAcceleration*mCamberStiffnessPerUnitGravity<p>
Camber force can be approximated as gravitationalAcceleration*mCamberStiffnessPerUnitGravity*camberAngle.<p>
Specified in kilograms per radian.</dd></dl>
<b>Range:</b> [0, PX_MAX_F32)<br>
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<a class="anchor" name="ab2bbd4b293db8fb9b94f310a59176a2"></a><!-- doxytag: member="PxVehicleTireData::mFrictionVsSlipGraph" ref="ab2bbd4b293db8fb9b94f310a59176a2" args="[3][2]" -->
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<td class="memname">PxReal <a class="el" href="classPxVehicleTireData.html#ab2bbd4b293db8fb9b94f310a59176a2">PxVehicleTireData::mFrictionVsSlipGraph</a>[3][2] </td>
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Graph of friction vs longitudinal slip with 3 points.
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<dl class="note" compact><dt><b>Note:</b></dt><dd>mFrictionVsSlipGraph[0][0] is always zero.<p>
mFrictionVsSlipGraph[0][1] is the friction available at zero longitudinal slip.<p>
mFrictionVsSlipGraph[1][0] is the value of longitudinal slip with maximum friction.<p>
mFrictionVsSlipGraph[1][1] is the maximum friction.<p>
mFrictionVsSlipGraph[2][0] is the end point of the graph.<p>
mFrictionVsSlipGraph[2][1] is the value of friction for slips greater than mFrictionVsSlipGraph[2][0].<p>
The friction value computed from the friction vs longitudinal slip graph is used to scale the friction value for the combination of material and tire type (<a class="el" href="classPxVehicleDrivableSurfaceToTireFrictionPairs.html" title="Friction for each combination of driving surface type and tire type.">PxVehicleDrivableSurfaceToTireFrictionPairs</a>).<p>
mFrictionVsSlipGraph[2][0] > mFrictionVsSlipGraph[1][0] > mFrictionVsSlipGraph[0][0]<p>
mFrictionVsSlipGraph[1][1] is typically greater than mFrictionVsSlipGraph[0][1]<p>
mFrictionVsSlipGraph[2][1] is typically smaller than mFrictionVsSlipGraph[1][1]<p>
longitudinal slips > mFrictionVsSlipGraph[2][0] use friction multiplier mFrictionVsSlipGraph[2][1]<p>
The final friction value used by the tire model is the value returned by <a class="el" href="classPxVehicleDrivableSurfaceToTireFrictionPairs.html" title="Friction for each combination of driving surface type and tire type.">PxVehicleDrivableSurfaceToTireFrictionPairs</a> multiplied by the value computed from mFrictionVsSlipGraph.</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classPxVehicleDrivableSurfaceToTireFrictionPairs.html" title="Friction for each combination of driving surface type and tire type.">PxVehicleDrivableSurfaceToTireFrictionPairs</a>, <a class="el" href="group__vehicle.html#g50d8d77d464150cfe6d3f16a12cdbf30" title="Prototype of shader function that is used to compute wheel torque and tire forces...">PxVehicleComputeTireForce</a></dd></dl>
<b>Range:</b> [0, PX_MAX_F32)<br>
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<a class="anchor" name="72bc73620f4d6265cf51869439574d3c"></a><!-- doxytag: member="PxVehicleTireData::mFrictionVsSlipGraphRecipx1Minusx0" ref="72bc73620f4d6265cf51869439574d3c" args="" -->
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Cached value of 1.0f/(mFrictionVsSlipGraph[1][0]-mFrictionVsSlipGraph[0][0]).
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<dl class="note" compact><dt><b>Note:</b></dt><dd>Not necessary to set this value because it is set by <a class="el" href="classPxVehicleWheelsSimData.html#cfc01818dd853e393bf3d9ea4370441c" title="Set the tire data of the idth wheel.">PxVehicleWheelsSimData::setTireData</a></dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classPxVehicleWheelsSimData.html#cfc01818dd853e393bf3d9ea4370441c" title="Set the tire data of the idth wheel.">PxVehicleWheelsSimData::setTireData</a> </dd></dl>
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<td class="memname">PxReal <a class="el" href="classPxVehicleTireData.html#5a2f35b2a0e3e225e13c62f6d4c588d6">PxVehicleTireData::mFrictionVsSlipGraphRecipx2Minusx1</a><code> [private]</code> </td>
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Cached value of 1.0f/(mFrictionVsSlipGraph[2][0]-mFrictionVsSlipGraph[1][0]).
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<dl class="note" compact><dt><b>Note:</b></dt><dd>Not necessary to set this value because it is set by <a class="el" href="classPxVehicleWheelsSimData.html#cfc01818dd853e393bf3d9ea4370441c" title="Set the tire data of the idth wheel.">PxVehicleWheelsSimData::setTireData</a></dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classPxVehicleWheelsSimData.html#cfc01818dd853e393bf3d9ea4370441c" title="Set the tire data of the idth wheel.">PxVehicleWheelsSimData::setTireData</a> </dd></dl>
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<a class="anchor" name="d52ba7c872280fd9a52e728a052fc7ff"></a><!-- doxytag: member="PxVehicleTireData::mLatStiffX" ref="d52ba7c872280fd9a52e728a052fc7ff" args="" -->
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<td class="memname">PxReal <a class="el" href="classPxVehicleTireData.html#d52ba7c872280fd9a52e728a052fc7ff">PxVehicleTireData::mLatStiffX</a> </td>
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Tire lateral stiffness is a graph of tire load that has linear behavior near zero load and flattens at large loads. mLatStiffX describes the minimum normalized load (load/restLoad) that gives a flat lateral stiffness response to load.
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<b>Range:</b> [0, PX_MAX_F32)<br>
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<td class="memname">PxReal <a class="el" href="classPxVehicleTireData.html#d2fa139cdff425babbf332384478a857">PxVehicleTireData::mLatStiffY</a> </td>
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Tire lateral stiffness is a graph of tire load that has linear behavior near zero load and flattens at large loads. mLatStiffY describes the maximum possible value of lateralStiffness/restLoad that occurs when (load/restLoad)>= mLatStiffX.
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<dl class="note" compact><dt><b>Note:</b></dt><dd>If load/restLoad is greater than mLatStiffX then the lateral stiffness is mLatStiffY*restLoad.<p>
If load/restLoad is less than mLatStiffX then the lateral stiffness is mLastStiffY*(load/mLatStiffX)<p>
Lateral force can be approximated as lateralStiffness * lateralSlip.<p>
Specified in per radian.</dd></dl>
<b>Range:</b> [0, PX_MAX_F32)<br>
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<a class="anchor" name="92083c9b5fbf957e4d4c54ab566b5457"></a><!-- doxytag: member="PxVehicleTireData::mLongitudinalStiffnessPerUnitGravity" ref="92083c9b5fbf957e4d4c54ab566b5457" args="" -->
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<td class="memname">PxReal <a class="el" href="classPxVehicleTireData.html#92083c9b5fbf957e4d4c54ab566b5457">PxVehicleTireData::mLongitudinalStiffnessPerUnitGravity</a> </td>
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Tire Longitudinal stiffness per unit gravitational acceleration.
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<dl class="note" compact><dt><b>Note:</b></dt><dd>Longitudinal stiffness of the tire is calculated as gravitationalAcceleration*mLongitudinalStiffnessPerUnitGravity.<p>
Longitudinal force can be approximated as gravitationalAcceleration*mLongitudinalStiffnessPerUnitGravity*longitudinalSlip.<p>
Specified in kilograms per radian.</dd></dl>
<b>Range:</b> [0, PX_MAX_F32)<br>
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<a class="anchor" name="0b498753b7cf6afa6f0d507413dcb629"></a><!-- doxytag: member="PxVehicleTireData::mPad" ref="0b498753b7cf6afa6f0d507413dcb629" args="[2]" -->
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<td class="memname">PxReal <a class="el" href="classPxVehicleTireData.html#0b498753b7cf6afa6f0d507413dcb629">PxVehicleTireData::mPad</a>[2]<code> [private]</code> </td>
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<a class="anchor" name="8b459e357483c7ee86304cc1280c2d2d"></a><!-- doxytag: member="PxVehicleTireData::mRecipLongitudinalStiffnessPerUnitGravity" ref="8b459e357483c7ee86304cc1280c2d2d" args="" -->
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<td class="memname">PxReal <a class="el" href="classPxVehicleTireData.html#8b459e357483c7ee86304cc1280c2d2d">PxVehicleTireData::mRecipLongitudinalStiffnessPerUnitGravity</a><code> [private]</code> </td>
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Cached value of 1.0/mLongitudinalStiffnessPerUnitGravity.
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<dl class="note" compact><dt><b>Note:</b></dt><dd>Not necessary to set this value because it is set by <a class="el" href="classPxVehicleWheelsSimData.html#cfc01818dd853e393bf3d9ea4370441c" title="Set the tire data of the idth wheel.">PxVehicleWheelsSimData::setTireData</a></dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classPxVehicleWheelsSimData.html#cfc01818dd853e393bf3d9ea4370441c" title="Set the tire data of the idth wheel.">PxVehicleWheelsSimData::setTireData</a> </dd></dl>
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<a class="anchor" name="8a9469d1683718ba3e5a2d2632dd9218"></a><!-- doxytag: member="PxVehicleTireData::mType" ref="8a9469d1683718ba3e5a2d2632dd9218" args="" -->
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<td class="memname"><a class="el" href="group__foundation.html#gcce5749db3dcfb916e98c253374264ed">PxU32</a> <a class="el" href="classPxVehicleTireData.html#8a9469d1683718ba3e5a2d2632dd9218">PxVehicleTireData::mType</a> </td>
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Tire type denoting slicks, wets, snow, winter, summer, all-terrain, mud etc.
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<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classPxVehicleDrivableSurfaceToTireFrictionPairs.html" title="Friction for each combination of driving surface type and tire type.">PxVehicleDrivableSurfaceToTireFrictionPairs</a></dd></dl>
<b>Range:</b> [0, PX_MAX_F32)<br>
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<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="PxVehicleComponents_8h-source.html">PxVehicleComponents.h</a></ul>
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