0.0) { ks = max(dot(reflectdir, viewdir), 0.0); ks = pow(ks, 16.0); } // add up the light sources, since this is a varying (global) it will pass to frag shader intensity = diffuse * kd * 1.5 + specular * ks; // the varying variable pos will be used by the fragment shader to determine where // in model space the current pixel is pos = vec3 (gl_Vertex); // send vertex information gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; } ]]>