nuclear@20: /* MRT assignments
nuclear@35:  * 0 - RGB: position, A: shininess
nuclear@20:  * 1 - RGB: normal
nuclear@60:  * 2 - RGB: diffuse color, A: shininess str.
nuclear@60:  * 3 - unused
nuclear@20:  */
nuclear@20: 
nuclear@20: uniform sampler2D tex_dif, tex_norm;
nuclear@20: 
nuclear@35: varying vec3 pos, norm, tang;
nuclear@35: 
nuclear@35: const float fog_start = 3.0;
nuclear@35: const float fog_end = 6.0;
nuclear@16: 
nuclear@16: void main()
nuclear@16: {
nuclear@20: 	vec3 n = normalize(norm);
nuclear@35: 	vec3 t = normalize(tang);
nuclear@35: 	vec3 b = cross(n, t);
nuclear@35: 
nuclear@35: 	mat3 tbn_mat = mat3(
nuclear@35: 			t.x, t.y, t.z,
nuclear@35: 			b.x, b.y, b.z,
nuclear@35: 			n.x, n.y, n.z);
nuclear@35: 
nuclear@35: 	// grab normal from the normal map, remap it and transform it to view space
nuclear@35: 	n = texture2D(tex_norm, gl_TexCoord[0].st).xyz * 2.0 - 1.0;
nuclear@37: 	n = normalize(tbn_mat * n);
nuclear@35: 
nuclear@35: 	float fog = clamp((fog_end + pos.z) / (fog_end - fog_start), 0.0, 1.0);
nuclear@20: 
nuclear@16: 	vec4 texel = texture2D(tex_dif, gl_TexCoord[0].st);
nuclear@35: 	vec3 diffuse = fog * (gl_FrontMaterial.diffuse * texel).xyz;
nuclear@35: 	vec3 spec = fog * gl_FrontMaterial.specular.xyz;
nuclear@20: 	float sstr = (spec.x + spec.y + spec.z) / 3.0;
nuclear@20: 
nuclear@34: 	gl_FragData[0] = vec4(pos, gl_FrontMaterial.shininess);
nuclear@35: 	gl_FragData[1] = vec4(n, 0.0);
nuclear@20: 	gl_FragData[2] = vec4(diffuse, sstr);
nuclear@33: 	//gl_FragData[3] = vec4(0.0, 0.0, 0.0, 0.0);
nuclear@16: }