"boingX" (transparent ogl) under carbon - Printable Version
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"boingX" (transparent ogl) under carbon - GioFX - Jun 28, 2004 02:50 AM
Hi to all, and sorry my english, this is my first post!
my question is: I saw the boingX sample and I'm interested in putting
the same effect in a carbon (XCode1.2) app.
First of all I found the SetWindowAlpha() statement to change the windows behaviour in a trasparent one, then AGL_SURFACE_OPACITY enable the same as NB.....SurfaceOpacity cocoa instruction, now I dont understand how to make a SOLID object in the middle of the desktop ... the object change his transparency value accordly to the AGL_SURFACE_OPACITY so it is semitransparent too.
tnx in advance
"boingX" (transparent ogl) under carbon - akisha - Jun 28, 2004 08:52 AM
Never having seen the boingX sample, I'm not quite sure what you're asking. If you want a transparent window (no frame, widgets, or background) and an opaque OpenGL context, what you want to do is create an overlay window.
First, create the window using CreateNewWindow
Create the AGL ContextÖ
Now, we need to set the context opacity so that it can have a transparent background.
That's it. Draw into the context like you would normally. Instead of filling the context with a color, glClear(GL_COLOR_BUFFER_BIT) will "erase" what you've drawn, making the window completely transparent.
"boingX" (transparent ogl) under carbon - GioFX - Jun 29, 2004 09:08 AM
1024K thanks Akisha!!