loop/shader/texture/simple.vert

#version 450 core
layout (std140, binding = 2) uniform PosTex { vec4 posTex[6]; };
out vec2 vTexPos;
void main() {
  gl_Position = vec4(posTex[gl_VertexID].xy,0,1);
  vTexPos = posTex[gl_VertexID].zw;
}