diff --git a/shader/twoD/arc.frag b/shader/twoD/arc.frag
index 7057e65d9..6235a85be 100644
--- a/shader/twoD/arc.frag
+++ b/shader/twoD/arc.frag
@@ -5,30 +5,13 @@ in vec2 angles;
 in vec2 dist;
 out vec4 fColor;
 
-//uniform float rotation;
-
 void main()
 {
-//  vec2 pos = gl_FragCoord.xy;
-//  float d = distance(pos,cenPosT);
-//  float dTest = max ( step(gRadOut/2,d)
-//                    , 1 - step(gRadIn/2,d)
-//                    );
-//
-//  vec2 posDiff = pos - cenPosT;
   float sa = angles.x;
   vec2 sv = vec2 (-sin(sa), cos(sa));
-//  float saTest = dot(sv,posDiff) >= 0 ? 0 : 1;
   float ea = angles.y;
   vec2 ev = vec2 (-sin(ea), cos(ea));
-//  float eaTest = dot(ev,posDiff) <= 0 ? 0 : 1;
-//  float aTest = ea - sa < radians(180) ? max (saTest,eaTest) 
-//                                       : min (saTest,eaTest);
-//
-//  float onArcTest = max(dTest,aTest); 
-//
-//  gl_FragDepth = max(gl_FragCoord.z , onArcTest);
- float d = (dist.x * dist.x) + (dist.y * dist.y);
+  float d = (dist.x * dist.x) + (dist.y * dist.y);
   if (d > 1 || d < gRadIn || dot(sv, dist) < 0 || dot(ev, dist) > 0) {discard;}
   fColor = gColor;
 }
diff --git a/shader/twoD/arc.vert b/shader/twoD/arc.vert
index 942525aad..ec1a4abb5 100644
--- a/shader/twoD/arc.vert
+++ b/shader/twoD/arc.vert
@@ -5,15 +5,10 @@ layout (location = 2) in vec4 saEaRadWdth;
 out vec4 vColor;
 out vec4 vparams;
 
-uniform vec2 winSize;
-uniform float zoom;
-uniform vec2 translation;
-uniform float rotation;
 uniform mat4 worldMat;
 
 void main()
 {
-  //gl_Position = worldMat * vec4(position.xyz,1);
   gl_Position = vec4(position.xyz,1);
   vColor = color;
   vparams = saEaRadWdth;