alpha vs worldAlpha in DisplayObject

[PianoScoreJP]

What is difference of alpha and worldAlpha in DisplayObject?

How should I use these properties ?

 

This code works

cotainer.alpha=0.1;

 

This code does not works

container.worldAlpha=0.1;

 

 

[xerver]

You should set "alpha", the "worldAlpha" is a read-only attribute that tells you the calculated alpha of this object based on its own alpha value and that of its parents which it will inherit when being rendered.

[PianoScoreJP]

Thank you.

 

....

container.alpha=0.9 

 

...loding or generate texture .....

 

var sprite = new Sprite(texture);

sprite.alpha=0.9;

container.addChild(sprite);

 

renderer.render(container);

.....

 

In this case , sprite.worldAlpha shows 0.81(0.9 x 0.9) after renering.

Is my understanding right?

[xerver]

Yes, that is correct.