Hi,
I need to create selectable 2D objects in OpenGL, like GUI Buttons. What would be a good way to do this in terms of performance? Do you typically use the selection feature in OpenGL (glRenderMode(GL_SELECT)) or do you have your own mechanism like boundary checking? I'm not sure what would be best because in order to use the selection mode it is necessary to render at least parts of the scene twice, so maybe there's a better/faster way?
regards,
bernhard[/i]