update method
Implementation
@override
void update(int dirt) {
if (dirt & ComponentDirt.worldTransform != 0) {
Mat2D parentWorld = parent is WorldTransformComponent
? (parent as WorldTransformComponent).worldTransform
: Mat2D();
var transform = Mat2D();
transform[4] = _layoutLocation.dx;
transform[5] = _layoutLocation.dy;
Mat2D.multiply(worldTransform, parentWorld, transform);
}
}