adding angleMode support to arc closes #348

Author: lauren mccarthy

lib/p5.js

@@ -3955,6 +3955,10 @@ var shape2d_primitives = function (require, core, canvas, constants) {
       if (!this._doStroke && !this._doFill) {
         return;
       }
+      if (this._angleMode === constants.DEGREES) {
+        start = this.radians(start);
+        stop = this.radians(stop);
+      }
       var ctx = this.drawingContext;
       var vals = canvas.arcModeAdjust(x, y, width, height, this._ellipseMode);
       var radius = vals.h > vals.w ? vals.h / 2 : vals.w / 2, xScale = vals.h > vals.w ? vals.w / vals.h : 1, yScale = vals.h > vals.w ? 1 : vals.h / vals.w;

lib/p5.min.js

@@ -51,7 +51,6 @@ define(function(require) {
    * var cnv = createCanvas(100, 100);
    * cnv.parent("myContainer");
    * </code></div>
-   * @example
    * <div class='norender'><code>
    * var div0 = createDiv('this is the parent');
    * var div1 = createDiv('this is the child');

src/objects/p5.Element.js

@@ -67,6 +67,10 @@ define(function (require) {
     if (!this._doStroke && !this._doFill) {
       return;
     }
+    if (this._angleMode === constants.DEGREES) {
+      start = this.radians(start);
+      stop = this.radians(stop);
+    }
     var ctx = this.drawingContext;
     var vals = canvas.arcModeAdjust(
       x,