draw sectors that span more than 2pi as 'full' circle

Author: etpinard

src/lib/angles.js

@@ -23,11 +23,13 @@ function rad2deg(rad) { return rad / PI * 180; }
  * is sector a full circle?
  * ... this comes up a lot in SVG path-drawing routines
  *
+ * N.B. we consider all sectors that span more that 2pi 'full' circles
+ *
  * @param {2-item array} aBnds : angular bounds in *radians*
  * @return {boolean}
  */
 function isFullCircle(aBnds) {
-    return Math.abs(Math.abs(aBnds[1] - aBnds[0]) - twoPI) < 1e-15;
+    return Math.abs(aBnds[1] - aBnds[0]) > twoPI - 1e-15;
 }
 
 /**

src/plots/polar/set_convert.js

@@ -166,7 +166,7 @@ function setConvertAngular(ax, polarLayout) {
                 // Set the angular range in degrees to make auto-tick computation cleaner,
                 // changing rotation/direction should not affect the angular tick value.
                 ax.range = Lib.isFullCircle(sectorInRad) ?
-                    sector.slice() :
+                    [sector[0], sector[0] + 360] :
                     sectorInRad.map(g2rad).map(rad2deg);
                 break;
 

test/image/mocks/polar_sector.json

@@ -1143,7 +1143,7 @@
     "polar20": {
       "sector": [
         -180,
-        180
+        200
       ],
       "bgcolor": "#d3d3d3",
       "domain": {