setAwake method
Set the sleep state of the body. A sleeping body has very low CPU cost.
Implementation
void setAwake(bool awaken) {
if (awaken) {
if ((flags & awakeFlag) == 0) {
flags |= awakeFlag;
sleepTime = 0.0;
}
} else {
flags &= ~awakeFlag;
sleepTime = 0.0;
linearVelocity.setZero();
_angularVelocity = 0.0;
force.setZero();
_torque = 0.0;
}
}