btRaycastVehicle dirft issues

[edl]

when the car run at a high speed,(eg.150kmh),then make a sharp turn,the wheels begin to slide,then i find a strange behaviour, the car is FWD drive, when the steer reach the maxium steer angle, the m_skidInfo is nearly 0.03,this make the m_forwardImpulse very small,the car nearly lost it engine power.then make a track like the RED line,not the expect GREEN line,is this right logic? and anybody has solution to solve this?

[mako90]

Hi,
what kind of vehicle simulation do you use?
I hope that for btRaycastVehicle playing with this parameters is going to help you.

Code: Select all

			btVehicleTuning()

				:m_suspensionStiffness(btScalar(5.88)),

				m_suspensionCompression(btScalar(0.83)),

				m_suspensionDamping(btScalar(0.88)),

				m_maxSuspensionTravelCm(btScalar(500.)),

				m_frictionSlip(btScalar(10.5))

			{

			}

			btScalar	m_suspensionStiffness;

			btScalar	m_suspensionCompression;

			btScalar	m_suspensionDamping;

			btScalar	m_maxSuspensionTravelCm;

			btScalar	m_frictionSlip;



		};

[edl]

Hi,
what kind of vehicle simulation do you use?
I hope that for btRaycastVehicle playing with this parameters is going to help you.

Code: Select all

			btVehicleTuning()

				:m_suspensionStiffness(btScalar(5.88)),

				m_suspensionCompression(btScalar(0.83)),

				m_suspensionDamping(btScalar(0.88)),

				m_maxSuspensionTravelCm(btScalar(500.)),

				m_frictionSlip(btScalar(10.5))

			{

			}

			btScalar	m_suspensionStiffness;

			btScalar	m_suspensionCompression;

			btScalar	m_suspensionDamping;

			btScalar	m_maxSuspensionTravelCm;

			btScalar	m_frictionSlip;



		};

thanks, but my btRaycastVehicle has been modied too much,simply modify the parameters isn't usefull for me, my question is,when the car begin to slide,the sideImpulse is very bigger than the forwardImpulse,that cause the car lost it power, it is difficult to make car drift a track like a cyclograph.
is there anyone has idea to improve the forwardImpulse,but not hurt the other logic.