uniform sampler2D texunit0;
uniform sampler2D texunit1;
uniform sampler2D texunit2;
uniform vec3 lpos;

varying vec4 pos;
varying vec3 normal;
varying vec3 lightVec;
varying vec3 viewVec;

void main( void )
{
   float blur_spread[5];

   blur_spread[0] = -0.003;
   blur_spread[1] = -0.001;
   blur_spread[2] = 0.000;
   blur_spread[3] = 0.001;
   blur_spread[4] = 0.003;

   float samples=1.0/25.0;

   gl_TexCoord[2] = gl_TexCoord[2]/gl_TexCoord[2].w;

   gl_TexCoord[2]=(gl_TexCoord[2]+ 1.0) * 0.5; 

   gl_TexCoord[2].z -=0.005;
   vec4 base = texture2D(texunit0, gl_TexCoord[0].xy);
   vec3 norm = texture2D(texunit1, gl_TexCoord[0].xy).xyz*2.0-1.0;

   float shade=0.0;
   float shadow=0.0;
 
   int x=0;
   int y=0;

   for(x=0;x<4;x++)
    {
      for(y=0;y<4;y++)
        {
         shadow = texture2D(texunit2,gl_TexCoord[2].xy+vec2(blur_spread[x],blur_spread[y]));
     
         if(shadow > gl_TexCoord[2].z) 
          shade+=samples;
        }
   }

  
   norm = normalize(gl_NormalMatrix * norm);

   float fresnel =max((norm.z-0.6)*-1.0,0.0);

   
   float diffuse = max(dot(lightVec, norm),0.0);

   float specular = max(dot(reflect(lightVec,norm), viewVec), 0.0)*1.7;
	
   specular=pow(specular,8.0);
  
   shade*=diffuse;
   shade*=0.8;
   shade+=0.2;

   gl_FragColor = (base* shade)+(vec4(0.0,0.1,0.3,0.0)*fresnel)+(vec4(0.5,0.5,0.4,0.0)*specular*shade);

   //gl_FragColor = vec4(pow(length(fwidth(pos).rgb),4.0),0.0,0.0,1.0);
   //gl_FragColor = vec4(0.0,0.5,1,0.0)*fresnel;
   //gl_FragColor = base *(shade*diffuse+0.2);


}