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backdrop image

Started by dirtypope Dec 16, 2002 at 3:33 AM 2 replies 300+ views

Original Post

Dec 16, 2002 at 3:33 AM

hi, how can i put an image behind everything in my scene that will resize with the window, kinda like a desktop wallpaper... i was wondering if theres a better way to do it than just a simple textured quad because if i want to move stuff arround on Z they might pass through it, although that would be good for hiding objects temporarily so i dont have to unload/reload them... how would you guys make a backdrop...

omega_001

Dec 16, 2002 at 5:58 AM

Render the backdrop using an orthographic projection rather than a gluPerspective one (if you also enable blending the backdrop shouldn''t be drawn over any objects, it will always appear in the background).

See the Nehe tutorials on how to do this.

K.

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hivolt

Dec 17, 2002 at 2:22 PM

One technique you should definitely check out is skyboxes. You basically disable depth testing, draw a small textured cube around the camera,then enable depth testing and draw everything else. It''s as if the sky textures on the box are infinitely far away. Google for "skybox textures" to find good textures. There''s C++ code at
http://gs06.isri.cmu.edu/gamedev/labs/lab2/docs/classSkybox.html
you can try modifying and using.

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