updateWorldTransform method
Implementation
void updateWorldTransform() {
_renderOpacity = _opacity;
if (parent != null) {
_renderCollapsed = _isCollapsedVisibility || parent._renderCollapsed;
_renderOpacity *= parent.childOpacity;
if (!_overrideWorldTransform) {
Mat2D.multiply(_worldTransform, parent._worldTransform, _transform);
}
} else {
Mat2D.copy(_worldTransform, _transform);
}
}