1 files changed, 56 insertions, 0 deletions
diff --git a/extern/bullet2/BulletDynamics/Vehicle/btWheelInfo.cpp b/extern/bullet2/BulletDynamics/Vehicle/btWheelInfo.cpp
new file mode 100644
index 00000000000..ef93c16fffc
--- /dev/null
+++ b/extern/bullet2/BulletDynamics/Vehicle/btWheelInfo.cpp
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2005 Erwin Coumans http://continuousphysics.com/Bullet/
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies.
+ * Erwin Coumans makes no representations about the suitability 
+ * of this software for any purpose.  
+ * It is provided "as is" without express or implied warranty.
+*/
+#include "btWheelInfo.h"
+#include "BulletDynamics/Dynamics/btRigidBody.h" // for pointvelocity
+
+
+btScalar btWheelInfo::getSuspensionRestLength() const
+{
+
+	return m_suspensionRestLength1;
+
+}
+
+void	btWheelInfo::updateWheel(const btRigidBody& chassis,RaycastInfo& raycastInfo)
+{
+	(void)raycastInfo;
+
+	
+	if (m_raycastInfo.m_isInContact)
+
+	{
+		btScalar	project= m_raycastInfo.m_contactNormalWS.dot( m_raycastInfo.m_wheelDirectionWS );
+		btVector3	 chassis_velocity_at_contactPoint;
+		btVector3 relpos = m_raycastInfo.m_contactPointWS - chassis.getCenterOfMassPosition();
+		chassis_velocity_at_contactPoint = chassis.getVelocityInLocalPoint( relpos );
+		btScalar projVel = m_raycastInfo.m_contactNormalWS.dot( chassis_velocity_at_contactPoint );
+		if ( project >= btScalar(-0.1))
+		{
+			m_suspensionRelativeVelocity = btScalar(0.0);
+			m_clippedInvContactDotSuspension = btScalar(1.0) / btScalar(0.1);
+		}
+		else
+		{
+			btScalar inv = btScalar(-1.) / project;
+			m_suspensionRelativeVelocity = projVel * inv;
+			m_clippedInvContactDotSuspension = inv;
+		}
+		
+	}
+
+	else	// Not in contact : position wheel in a nice (rest length) position
+	{
+		m_raycastInfo.m_suspensionLength = this->getSuspensionRestLength();
+		m_suspensionRelativeVelocity = btScalar(0.0);
+		m_raycastInfo.m_contactNormalWS = -m_raycastInfo.m_wheelDirectionWS;
+		m_clippedInvContactDotSuspension = btScalar(1.0);
+	}
+}