void DiCircleEmitter::InitParticlePosition(DiParticle* particle)
{
float angle = 0;
if (mRandom)
{
angle = DiMath::RangeRandom(0, DiMath::TWO_PI);
}
else
{
mCircleAngle += mStep;
mCircleAngle = mCircleAngle > DiMath::TWO_PI ? mCircleAngle - DiMath::TWO_PI : mCircleAngle;
angle = mCircleAngle;
}
mX = DiMath::Cos(angle);
mZ = DiMath::Sin(angle);
DiParticleSystem* sys = mParentElement->GetParentSystem();
if (sys)
{
particle->position = GetDerivedPosition() +
sys->GetDerivedOrientation() * mOrientation * (mEmitterScale * DiVec3(mX * mRadius, 0, mZ * mRadius));
}
else
{
particle->position = GetDerivedPosition() + mEmitterScale * ( mOrientation * DiVec3(mX * mRadius, 0, mZ * mRadius) );
}
particle->originalPosition = particle->position;
}
void DiBone::GetOffsetTransform( DiMat4& m ) const
{
DiVec3 locScale = GetDerivedScale() * mBindDerivedInverseScale;
DiQuat locRotate = GetDerivedOrientation() * mBindDerivedInverseOrientation;
DiVec3 locTranslate = GetDerivedPosition() +
locRotate * (locScale * mBindDerivedInversePosition);
m.makeTransform(locTranslate, locScale, locRotate);
}
void DiBone::SetBindingPose()
{
SetInitialState();
mBindDerivedInversePosition = -GetDerivedPosition();
mBindDerivedInverseScale = DiVec3::UNIT_SCALE / GetDerivedScale();
mBindDerivedInverseOrientation = GetDerivedOrientation().Inverse();
}
void DiBone::GetOffsetTransform(btTransform& t) const
{
DiVec3 locScale = GetDerivedScale() * mBindDerivedInverseScale;
DiQuat locRotate = GetDerivedOrientation() * mBindDerivedInverseOrientation;
DiVec3 locTranslate = GetDerivedPosition() +
locRotate * (locScale * mBindDerivedInversePosition);
t.setOrigin(btVector3(locTranslate.x,locTranslate.y,locTranslate.z));
btQuaternion qt;
qt.setValue(locRotate.x,locRotate.y,locRotate.z,locRotate.w);
t.setRotation(qt);
t.setBasis(t.getBasis().scaled(btVector3(locScale.x, locScale.y, locScale.z)));
}
bool DiInstancedModel::FindVisible( DiCamera *camera ) const
{
bool retVal = GetVisible();
float r = DiMath::BoundingRadiusFromAABB(GetBoundingBox());
if( retVal && camera )
{
retVal = camera->IsVisible(DiSphere(GetDerivedPosition(),r));
}
return retVal;
}
void DiGravityController::PreProcessParticles(DiParticleElement* particleTechnique, float timeElapsed)
{
GetDerivedPosition();
}
