#cull back

@vs vs
in vec3 a_pos;
in vec2 a_uv;

out vec2 uv;

void main()
{
  vec3 pos = a_pos;
  pos -= 0.5;
  pos *= 2;
  uv = a_uv;
  gl_Position = vec4(pos.xy, 0, 1.0);
}
@end

@fs fs
in vec2 uv;

out vec4 color;

#define PI 3.141592

@image_sample_type diffuse unfilterable_float
texture2D diffuse;
@sampler_type smp nonfiltering
sampler smp;

uniform vec2 mouse;
uniform float time;

@include_block frag

void main()
{
  frag();
}
@end

@program p vs fs