Cel-Shading on Quadrics (gluSphere, gluCylinder)

Started by ytrctb, Jun 23 2010 05:04 AM

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#1 ytrctb Members - Reputation: 100

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Posted 23 June 2010 - 05:04 AM

Hi guys,

Is there a way to do Cel-Shading on Quadrics using calls like gluSphere and gluCylinder?

I looked at Nehe's lesson on Cel-Shading but it seems like it is specific to shapes drawn with using glVertex.

Thanks!

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#2 lc_overlord Members - Reputation: 432

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Posted 23 June 2010 - 07:44 AM

that specific method should still work with Quadrics as far as i know

www.flashbang.se | www.thegeekstate.com | nehe.gamedev.net | glAux fix for lesson 6 | @thegeekstate

#3 ytrctb Members - Reputation: 100

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Posted 23 June 2010 - 10:56 AM

Can you explain how? I'm pretty new with this. Is there a way to get the vertices off of gluSphere?

#4 lc_overlord Members - Reputation: 432

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Posted 23 June 2010 - 02:25 PM

not in a simple way i think, getting the outline is fairly easy, just replace the glvertex calls with quadrics calls.
The cellshading is a bit harder though, but i think it can be done trough spheremaping (or cubemapping) using texture coordinate generation (glTexGen).

www.flashbang.se | www.thegeekstate.com | nehe.gamedev.net | glAux fix for lesson 6 | @thegeekstate

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