问题
Im a beginner on iphone OS development.
I followed jeff's tutorial here about hud display in iphone OS http://iphonedevelopment.blogspot.com/2010/02/drawing-hud-display-in-opengl-es.html The sample works on the accompanying project with the isocahedron as the background of the HUD and the is working as expected with colors and the text.
But when I copied the code into my modified project with the textured objects from one of his tutorial series on this one http://iphonedevelopment.blogspot.com/2009/05/opengl-es-from-ground-up-part-6_25.html, I see that the HUD display has no colors no matter how I change the color settings.
I trial and error of disabling and enabling the client states and the GL Modes with no luck. Anyone who had analyzed the situation, has experienced such, has find out what's needed to change in the code, please let me know
回答1:
Check that you disable GL_LIGHTING and GL_TEXTURE_2D before you draw the HUD.
来源：https://stackoverflow.com/questions/2681102/opengl-es-displaying-hud-display-has-no-color-on-top-of-textured-3d-objects