Is there a way to know if a Sprite is transparent in a position??

jbernabeu

I have a sprite composed with several images and flatten, Is there a way to know if a Sprite is transparent in a position??

Any idea ???

membersheep

If the sprite is composed by images you could follow the touch event bubbling through the images and check the texture values in that point for every image, but I don't know if it's possible to do it 😮 .

Daniel

Membersheep is right: there's nothing like that built in; you'd have to manually override the "hitTest" method of SPImage and check the color of the texture at that position.

The problem: you can't access a texture like that in OpenGL. So you'd have to get to the transparency information in a separate step, e.g. by looking directly at the bitmap the texture was made from.

Yes, it *is* tricky. 😐