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Halos

Started by alistair b Jul 3, 2000 at 9:45 AM 3 replies 500+ views

Original Post

Jul 3, 2000 at 9:45 AM

how can i put a halo around and object (eg a cube)? the ideas i''ve had are: 1: draw larger transparent cubes over the 1st (slow and doesn''t really work) 2: produce a "squished" version of the cube like the shadow stuff in the Superbible (would this work?) 3: wait for 3d Textures in OpenGL1.2 (not really an option) i''d appreciate any help... alistair

Morgan

Jul 3, 2000 at 10:12 AM

Go to http://reality.sgi.com/opengl/tips/ and read "Rendering a Magic Halo with OpenGL", it might be what you''re looking for.

Morgan

bosco

Jul 3, 2000 at 3:50 PM

Depending on what kind of performance hit you're willing to accept and what it's for, I'd consider making my own torus and texturing it appropriately... It'd look really phat..

bosco()

Edited by - bosco on July 3, 2000 4:51:40 PM

bosco

Jul 5, 2000 at 2:39 AM

Hehe, dude, I don''t know why I didn''t think of this when I originally posted, but I must have been zoned or something.. I haven''t given this much of read over, but it''s from a reputable source and he''s done a crapp load of tricks.. So check this link out.. Beware, it is advanced..

http://reality.sgi.com/mjk/tips/StenciledHaloEffect.html

bosco()

alistair b

Author

alistair b

Jul 5, 2000 at 8:03 AM

thanks!

the stencil buffer stuff is a bit slow (i think) on old cards...
and a bit complex as i''ve never used it b4.

i solved the problem using the shadow matrix idea

alistair

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