extern vec3 p1;
extern vec2 p1uv;
extern vec3 p2;
extern vec2 p2uv;
extern vec3 p3;
extern vec2 p3uv;
extern Image tex;

#ifdef VERTEX
vec4 position( mat4 transform_projection, vec4 vertex_position )
{
    vec3 vpos = vertex_position.xyz;
    if (vpos == p1)
    {
        gl_TexCoord[0] = vec4(p1uv,0,0);
    }
    else if (vpos == p2)
    {
        gl_TexCoord[0] = vec4(p2uv,0,0);
    }
    else if (vpos == p3)
    {
        gl_TexCoord[0] = vec4(p3uv,0,0);
    }
    return transform_projection * vertex_position;
}
#endif

#ifdef PIXEL
vec4 effect( vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords )
{
    vec4 texcolor = Texel(tex, gl_TexCoord[0].xy);
    return texcolor;
}
#endif