@block vert
uniform vec4 rect;
uniform vec2 diffuse_size;
void vert()
{
  pos *= vec3(diffuse_size * rect.zw,1);
  uv = (uv*rect.zw)+rect.xy;
}
@end

@block frag

void frag()
{
  color = texture(sampler2D(diffuse,smp), uv);
  if (color.a != 0) discard;
}
@end

#include <base.cg>