#version 140
in vec2 tex_coord;
void main (void)
{
vec4 white = vec4(1.0);
vec4 black = vec4(0.2);
vec4 color = white;
// First, cut out our circle
float x = tex_coord.x*2.0 - 1.0;
float y = tex_coord.y*2.0 - 1.0;
discard;
gl_FragColor = color;
}