git.mutantstargoat.com Git - laserbrain_demo/blob - shadow.v.glsl

   1 uniform mat4 envmap_matrix;
   2
   3 varying vec3 vdir, ldir[3], normal;
   4 varying vec4 shadow_tc;
   5 varying vec3 wdir;
   6
   7 void main()
   8 {
   9         gl_Position = ftransform();
  10
  11         vec3 vpos = (gl_ModelViewMatrix * gl_Vertex).xyz;
  12         normal = gl_NormalMatrix * gl_Normal;
  13         vdir = -vpos;
  14         wdir = (envmap_matrix * vec4(vdir, 1.0)).xyz;   // bring back to world space
  15         ldir[0] = gl_LightSource[0].position.xyz - vpos;
  16         ldir[1] = gl_LightSource[1].position.xyz - vpos;
  17         ldir[2] = gl_LightSource[2].position.xyz - vpos;
  18         gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
  19
  20         mat4 offmat = mat4(0.5, 0.0, 0.0, 0.0,
  21                         0.0, 0.5, 0.0, 0.0,
  22                         0.0, 0.0, 0.5, 0.0,
  23                         0.5, 0.5, 0.5, 1.0);
  24         mat4 tex_matrix = offmat * gl_TextureMatrix[1];
  25
  26         shadow_tc = tex_matrix * vec4(vpos, 1.0);
  27 }