-//
-// Vertex shader for drawing the Mandelbrot set
-//
-// Authors: Dave Baldwin, Steve Koren, Randi Rost
-// based on a shader by Michael Rivero
-//
-// Copyright (c) 2002-2005: 3Dlabs, Inc.
-//
-// See 3Dlabs-License.txt for license information
-//
-
-uniform vec3 LightPosition;
-uniform float SpecularContribution;
-uniform float DiffuseContribution;
-uniform float Shininess;
-
-varying float LightIntensity;
-varying vec3 Position;
-
-void main()
-{
- vec3 ecPosition = vec3(gl_ModelViewMatrix * gl_Vertex);
- vec3 tnorm = normalize(gl_NormalMatrix * gl_Normal);
- vec3 lightVec = normalize(LightPosition - ecPosition);
- vec3 reflectVec = reflect(-lightVec, tnorm);
- vec3 viewVec = normalize(-ecPosition);
- float spec = max(dot(reflectVec, viewVec), 0.0);
- spec = pow(spec, Shininess);
- LightIntensity = DiffuseContribution *
- max(dot(lightVec, tnorm), 0.0) +
- SpecularContribution * spec;
- Position = vec3(gl_MultiTexCoord0 - 0.5) * 5.0;
- gl_Position = ftransform();
-
-}
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