app/assets/javascripts/Shaders/SunVS.glsl in cesium-0.20.0 vs app/assets/javascripts/Shaders/SunVS.glsl in cesium-0.21

@@ -1,7 +1,9 @@
 attribute vec2 direction;
 
+uniform float u_size;
+
 varying vec2 v_textureCoordinates;
 
 void main() 
 {
     vec4 position;
@@ -15,12 +17,10 @@
     }
     
     vec4 positionEC = czm_view * position;
     vec4 positionWC = czm_eyeToWindowCoordinates(positionEC);
     
-    vec4 limb = czm_eyeToWindowCoordinates(positionEC + vec4(czm_solarRadius, 0.0, 0.0, 0.0));
-    vec2 halfSize = vec2(length(limb.xy - positionWC.xy));
-    halfSize *= 30.0;
+    vec2 halfSize = vec2(u_size * 0.5);
     halfSize *= ((direction * 2.0) - 1.0);
     
     gl_Position = czm_viewportOrthographic * vec4(positionWC.xy + halfSize, -positionWC.z, 1.0);
     
     v_textureCoordinates = direction;