[android-developers] Re: How can I know if OpenGl has drawn something?

What are you trying to do?

glReadPixels is a pipeline stall - it will slow everything down. If
you want to check to see if an object has been touched, use a
collision detection system, unproject the touch point into a ray and
get the closest item that intersects with that ray. It's actually
easier, more reliable and faster.

On May 10, 10:16 am, Alfonso <alfonsocris...@gmail.com> wrote:
> glReadPixels is too slow, so I need another way. Without testing
> object by object, Is there any other way?
>
> Thanks you very much
>
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