integrates mode selection in the draw function

lib/torque/renderer/ball.js

@@ -100,7 +100,16 @@ BallRenderer.prototype = {
 		  var ys = Math.pow(y - y0, 2);
 		  return Math.sqrt( xs + ys );
 	},
-	draw: function(dataArray){
+	draw: function(modeData, dataArray){
+		switch (this.mode){
+			case "contour":
+				this.contour();
+			case "isopleth":
+				this.contour(5);
+				this.isopleth();
+			default:
+				this.heatmap();
+		}
 		if (!dataArray){
 			if (this.isoplethLayer) dataArray = this.isoplethLayer;
 			else if (this.contourLayer) dataArray = this.contourLayer;
@@ -122,12 +131,6 @@ BallRenderer.prototype = {
 				to[i+3] = from[i+3];
 			}
 		}
-	},
-	reduceArray: function(){
-
-	},
-	expandArray: function(){
-
 	},
 	invalidate: function(full){
 		// if(!transit){