shaders/routeui.vs

   1 layout (location=0) in vec2 a_co;
   2
   3 uniform vec4 uOffset;
   4
   5 void main()
   6 {
   7    float fbarx = (a_co.x+uOffset.x) * uOffset.z;
   8    float fbary = a_co.y*uOffset.w + uOffset.y;
   9
  10    vec2 vpos = vec2( fbarx, fbary );
  11    gl_Position = vec4(vpos,0.0,1.0);
  12 }