// diffuse.vs
//
// setup interpolants for diffuse lighting

uniform vec3 lightPos0;
varying vec3 N, L;

void main(void)
{
    // vertex MVP transform
    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;

    // eye-space normal
    N = gl_NormalMatrix * gl_Normal;

    // eye-space light vector
    vec4 V = gl_ModelViewMatrix * gl_Vertex;
    L = lightPos0 - V.xyz;

    // Copy the primary color
    gl_FrontColor = gl_Color;
}