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Avoid that the kart is 'shaking' backwards/forwards when flying.

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hiker 2015-07-21 16:56:51 +10:00
parent 8be383015c
commit bb058deea5
1 changed files with 9 additions and 0 deletions
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9
src/physics/btKart.cpp
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@ -439,6 +439,15 @@ void btKart::updateVehicle( btScalar step )
btVector3 kart_up = getChassisWorldTransform().getBasis().getColumn(1);
btVector3 terrain_up(0,1,0);
btVector3 axis = kart_up.cross(terrain_up);
axis.normalize();
// To avoid the kart going backwards/forwards (or rolling sideways),
// set the pitch/roll to 0 before applying the 'straightening' impulse.
// TODO: make this works if gravity is changed.
btVector3 av = m_chassisBody->getAngularVelocity();
av.setX(0);
av.setZ(0);
m_chassisBody->setAngularVelocity(av);
// Give a nicely balanced feeling for rebalancing the kart
m_chassisBody->applyTorqueImpulse(axis * m_kart->getKartProperties()->getSmoothFlyingImpulse());
}