#version 450
#extension GL_KHR_vulkan_glsl : enable

layout(location = 0) out struct
{
  vec2 uv; // location = 0

} Out;

vec2 CreateQuad(in uint vertexID)
{
  uint b = 1 << vertexID;
  return vec2 ((0x3 & b) != 0, (0x9 & b) != 0);
}

void main()
{
  vec2 texCoord = CreateQuad (gl_VertexIndex);
  vec2 vertexPos = texCoord - vec2(0.5f);
  gl_Position = vec4 (vertexPos, 0.0f, 1.0f);
}