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avoid initial bad measure of tractor target's velocity

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This commit is contained in:
Andrew Meadows 2018-02-02 16:42:51 -08:00
parent a5e968867e
commit 83ab994181
1 changed files with 8 additions and 9 deletions

17
libraries/physics/src/ObjectActionTractor.cpp
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@ -126,17 +126,16 @@ bool ObjectActionTractor::prepareForTractorUpdate(btScalar deltaTimeStep) {
withWriteLock([&]{
if (linearValid && linearTractorCount > 0) {
position /= linearTractorCount;
_lastPositionTarget = _positionalTarget;
if (_positionalTargetSet) {
_lastPositionTarget = _positionalTarget;
} else {
_lastPositionTarget = position;
}
_positionalTarget = position;
if (deltaTimeStep > EPSILON) {
// blend the new velocity with the old (low-pass filter)
glm::vec3 newVelocity = (1.0f / deltaTimeStep) * (position - _lastPositionTarget);
const float blend = 0.25f;
_linearVelocityTarget = (1.0f - blend) * _linearVelocityTarget + blend * newVelocity;
_positionalTarget = position;
if (deltaTimeStep > EPSILON) {
// blend the new velocity with the old (low-pass filter)
glm::vec3 newVelocity = (1.0f / deltaTimeStep) * (_positionalTarget - _lastPositionTarget);
const float blend = 0.25f;
_linearVelocityTarget = (1.0f - blend) * _linearVelocityTarget + blend * newVelocity;
}
}
_positionalTargetSet = true;
_active = true;