//---------------------------------------------------------------------
void Bone::setBindingPose(void)
{
setInitialState();
// Save inverse derived position/scale/orientation, used for calculate offset transform later
mBindDerivedInversePosition = - _getDerivedPosition();
mBindDerivedInverseScale = Vector3::UNIT_SCALE / _getDerivedScale();
mBindDerivedInverseOrientation = _getDerivedOrientation().Inverse();
}
// [7/30/2008 zhangxiang]
const Matrix4 &sgNode::getFullTransform(void) const{
if(m_bCachedTransformOutOfDate){
// Use derived values
m_CachedTransform.makeTransform(
_getDerivedPosition(),
_getDerivedScale(),
_getDerivedOrientation());
m_bCachedTransformOutOfDate = false;
}
return m_CachedTransform;
}
//---------------------------------------------------------------------
void Bone::_getOffsetTransform(Matrix4& m) const
{
// Combine scale with binding pose inverse scale,
// NB just combine as equivalent axes, no shearing
Vector3 scale = _getDerivedScale() * mBindDerivedInverseScale;
// Combine orientation with binding pose inverse orientation
Quaternion rotate = _getDerivedOrientation() * mBindDerivedInverseOrientation;
// Combine position with binding pose inverse position,
// Note that translation is relative to scale & rotation,
// so first reverse transform original derived position to
// binding pose bone space, and then transform to current
// derived bone space.
Vector3 translate = _getDerivedPosition() + rotate * (scale * mBindDerivedInversePosition);
m.makeTransform(translate, scale, rotate);
}
// [7/30/2008 zhangxiang]
const Vector3 &sgNode::absoluteScale(void) const{
return _getDerivedScale();
}
