Rendering solid and wire at once

Graphics and GPU Programming Programming

Started by Alessandro November 17, 2011 09:58 PM

0 comments, last by Promethium 12 years, 5 months ago

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November 17, 2011 09:58 PM

Hi, I was wondering if the only way to display an object solid and wire is to render it twice, first with GL_FILL and then with GL_WIRE. Or maybe there are some shaders that can do that in one pass? Thanks

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Promethium

580

November 17, 2011 10:25 PM

Sure, you need to calculate the distance from the edge of the triangle to the current fragment in the fragment shader and the change the color of the fragment based on that distance. This page and paper describes a method that gives good results: Wireframe Drawing.