[[vertex]]

uniform mat4 mvp;

in vec4 pos;
in vec3 nor;
in vec2 uvs;
out vec3 n;
out vec3 p;

void main()
{
    n = nor;
    p = vec3(mvp * pos);
    gl_Position = vec4(uvs * 2.0 - 1.0, 0.0, 1.0);
}

[[fragment]]

uniform int mode;

in highp vec3 n;
in highp vec3 p;
out highp vec3 frag;

void main()
{
    switch(mode)
    {
    case 0: frag = normalize(n); break;
    case 1: frag = p; break;
    }
}