Work towards doing transformations using uniforms

shader/arc.vert

@@ -4,6 +4,12 @@ layout (location = 1) in vec4 color;
 layout (location = 2) in vec4 saEaRadWdth;
 out vec4 vColor;
 out vec4 vparams;
+
+uniform vec2 winSize;
+uniform float zoom;
+uniform vec2 translation;
+uniform float rotation;
+
 void main()
 {
   gl_Position = vec4(position,1);