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only predict remote transform for moving objects

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This commit is contained in:
Andrew Meadows 2015-01-05 15:16:03 -08:00
parent 11de33b98b
commit e2884c56f5
1 changed files with 15 additions and 11 deletions
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26
libraries/physics/src/ObjectMotionState.cpp
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@ -157,9 +157,11 @@ bool ObjectMotionState::shouldSendUpdate(uint32_t simulationFrame, float subStep
// TODO: Andrew to reconcile Bullet and legacy damping coefficients.
// compute position error
_sentVelocity += _sentAcceleration * dt;
_sentVelocity *= powf(1.0f - _linearDamping, dt);
_sentPosition += dt * _sentVelocity;
if (glm::length2(_sentVelocity) > 0.0f) {
_sentVelocity += _sentAcceleration * dt;
_sentVelocity *= powf(1.0f - _linearDamping, dt);
_sentPosition += dt * _sentVelocity;
}
btTransform worldTrans = _body->getWorldTransform();
glm::vec3 position = bulletToGLM(worldTrans.getOrigin());
@ -170,14 +172,16 @@ bool ObjectMotionState::shouldSendUpdate(uint32_t simulationFrame, float subStep
return true;
}
// compute rotation error
_sentAngularVelocity *= powf(1.0f - _angularDamping, dt);
float spin = glm::length(_sentAngularVelocity);
const float MIN_SPIN = 1.0e-4f;
if (spin > MIN_SPIN) {
glm::vec3 axis = _sentAngularVelocity / spin;
_sentRotation = glm::normalize(glm::angleAxis(dt * spin, axis) * _sentRotation);
if (glm::length2(_sentAngularVelocity) > 0.0f) {
// compute rotation error
_sentAngularVelocity *= powf(1.0f - _angularDamping, dt);
float spin = glm::length(_sentAngularVelocity);
const float MIN_SPIN = 1.0e-4f;
if (spin > MIN_SPIN) {
glm::vec3 axis = _sentAngularVelocity / spin;
_sentRotation = glm::normalize(glm::angleAxis(dt * spin, axis) * _sentRotation);
}
}
const float MIN_ROTATION_DOT = 0.98f;
glm::quat actualRotation = bulletToGLM(worldTrans.getRotation());