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fix hold action with zero offsetLength

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This commit is contained in:
Brad Hefta-Gaub 2015-09-04 14:07:12 -07:00
parent 7d2bdb3689
commit 21afafd4e6
1 changed files with 7 additions and 2 deletions
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9
libraries/physics/src/ObjectActionSpring.cpp
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@ -66,10 +66,15 @@ void ObjectActionSpring::updateActionWorker(btScalar deltaTimeStep) {
if (_linearTimeScale < MAX_TIMESCALE) {
btVector3 offset = rigidBody->getCenterOfMassPosition() - glmToBullet(_positionalTarget);
float offsetLength = offset.length();
float speed = (offsetLength > FLT_EPSILON) ? glm::min(offsetLength / _linearTimeScale, SPRING_MAX_SPEED) : 0.0f;
btVector3 targetVelocity(0.0f, 0.0f, 0.0f);
if (offsetLength > 0) {
float speed = (offsetLength > FLT_EPSILON) ? glm::min(offsetLength / _linearTimeScale, SPRING_MAX_SPEED) : 0.0f;
targetVelocity = (-speed / offsetLength) * offset;
}
// this action is aggresively critically damped and defeats the current velocity
rigidBody->setLinearVelocity((- speed / offsetLength) * offset);
rigidBody->setLinearVelocity(targetVelocity);
}
if (_angularTimeScale < MAX_TIMESCALE) {