Work towards doing transformations using uniforms

shader/background.geom

@@ -5,6 +5,8 @@ in vec4 vParams [];
 in vec2 vWinSize [];
 out vec2 gTexPos;
 
+uniform vec2 translation;
+
 vec2 rotBy( float rot, vec2 v)
 {
   return vec2 ( v.x * cos(rot) - v.y * sin(rot)
@@ -15,7 +17,7 @@ vec2 rotBy( float rot, vec2 v)
 
 void main()
 {
-  vec2 cPos = vec2(vParams[0].x / 250 , vParams[0].y /250 );
+  vec2 cPos = vec2(translation.x / 250 , translation.y /250 );
   float zoom = vParams[0].w;
   float rot  = 0 - vParams[0].z;