//
// Fragment shader for procedural lighting
//
// Copyright (c) 2007 by Andrey Budko
//
// See gl_shader.c for license information
//

void DoFiltering()
{
  float pixel_c  = rgbaBias + rgbaScale * texture2D(tex, texCoord).r;

  final = texture2D(texColormap, vec2(pixel_c, cm));
}