delete old pahts when re-drawing branch

baumgen.js

@@ -138,14 +138,23 @@ class Branch {
     }
 
     draw(pos) {
-        var branch = new Path();
+        if(typeof this._crown !== "undefined") {
+            this._crown.removeSegments();
+            delete this._crown;
+        }
+        if(typeof this._branch !== "undefined") {
+            this._branch.removeSegments();
+            delete this._branch;
+        }
+
+        this._branch = new Path();
         var bvec = new Point(Math.cos(this.angle) * this.length,
                                   -1 * Math.sin(this.angle) * this.length);
         var end = pos.add(bvec);
-        branch.strokeColor = 'black';
-        branch.strokeWidth = 2;
-        branch.add(pos);
-        branch.add(end);
+        this._branch.strokeColor = 'black';
+        this._branch.strokeWidth = 2;
+        this._branch.add(pos);
+        this._branch.add(end);
 
         if(typeof this.crown !== "undefined") {
             console.log("CROWN");
@@ -155,19 +164,19 @@ class Branch {
                 var bswidth = this.crown.length * this.crown.width;
                 var bsvec = new Point(Math.sin(this.angle) * bswidth / 2,
                                       Math.cos(this.angle) * bswidth / 2);
-                var crown = new Path();
-                crown.strokeColor = 'black';
-                crown.fillColor = 'white';
-                crown.strokeWidth = 2;
-                crown.closed = true;
-                //crown.selected = true;
-                crown.add(end);
-                crown.add(end.add(cvec.multiply(this.crown.bisect))
+                this._crown = new Path();
+                this._crown.strokeColor = 'black';
+                this._crown.fillColor = 'white';
+                this._crown.strokeWidth = 2;
+                this._crown.closed = true;
+                //this._crown.selected = true;
+                this._crown.add(end);
+                this._crown.add(end.add(cvec.multiply(this.crown.bisect))
                                       .add(bsvec));
-                crown.add(end.add(cvec));
-                crown.add(end.add(cvec.multiply(this.crown.bisect))
+                this._crown.add(end.add(cvec));
+                this._crown.add(end.add(cvec.multiply(this.crown.bisect))
                                       .subtract(bsvec));
-                console.log(crown);
+                console.log(this._crown);
                 
             } else if(this.crown.shape = "triangle") {
                 console.log("TRIANGLE");
@@ -175,16 +184,16 @@ class Branch {
                 var bswidth = this.crown.length * this.crown.width;
                 var bsvec = new Point(Math.sin(this.angle) * bswidth / 2,
                                       Math.cos(this.angle) * bswidth / 2);
-                var crown = new Path();
-                crown.strokeColor = 'black';
-                crown.fillColor = 'white';
-                crown.strokeWidth = 2;
-                crown.closed = true;
-                //crown.selected = true;
-                crown.add(end.add(bsvec));
-                crown.add(end.add(cvec));
-                crown.add(end.subtract(bsvec));
-                console.log(crown);
+                this._crown = new Path();
+                this._crown.strokeColor = 'black';
+                this._crown.fillColor = 'white';
+                this._crown.strokeWidth = 2;
+                this._crown.closed = true;
+                //this._crown.selected = true;
+                this._crown.add(end.add(bsvec));
+                this._crown.add(end.add(cvec));
+                this._crown.add(end.subtract(bsvec));
+                console.log(this._crown);
             }
         }