nuclear@60: /* multipass renderer shader 1: RGB: normal */
nuclear@60: 
nuclear@60: uniform sampler2D tex_norm;
nuclear@60: 
nuclear@60: varying vec3 pos, norm, tang;
nuclear@60: 
nuclear@60: void main()
nuclear@60: {
nuclear@60: 	vec3 n = normalize(norm);
nuclear@60: 	vec3 t = normalize(tang);
nuclear@60: 	vec3 b = cross(n, t);
nuclear@60: 
nuclear@60: 	mat3 tbn_mat = mat3(
nuclear@60: 			t.x, t.y, t.z,
nuclear@60: 			b.x, b.y, b.z,
nuclear@60: 			n.x, n.y, n.z);
nuclear@60: 
nuclear@60: 	// grab normal from the normal map, remap it and transform it to view space
nuclear@60: 	n = texture2D(tex_norm, gl_TexCoord[0].st).xyz * 2.0 - 1.0;
nuclear@60: 	n = normalize(tbn_mat * n);
nuclear@60: 
nuclear@60: 	gl_FragColor = vec4(n, 0.0);
nuclear@60: }