update method
Implementation
void update(double deltaTime) {
widget._beforeUpdate();
setState(() {
//update all effects and provide canvas with updated variables
for (EEffect eEffect in widget._effects) {
if (eEffect.updateFromScene) {
eEffect.update(deltaTime, Size(widget._width, widget._height));
}
}
eSceneCanvas.updateCanvasValues(widget._darkness, widget._effects);
});
widget._afterUpdate();
}