Use same cleanup procedure for TGeo drawing

Author: linev

scripts/JSRoot3DPainter.js

@@ -323,6 +323,7 @@
       if (obj.children) {
          for (var i = 0; i < obj.children.length; i++)
             JSROOT.Painter.DisposeThreejsObject(obj.children[i]);
+         obj.children = undefined;
       }
       if (obj.geometry) {
          obj.geometry.dispose();
@@ -349,6 +350,7 @@
          this.clear_3d_canvas();
 
          JSROOT.Painter.DisposeThreejsObject(this.scene);
+         if (this.control) this.control.dispose();
 
          delete this.size3d;
          delete this.scene;

scripts/JSRootGeoPainter.js

@@ -1839,8 +1839,10 @@
 
       if (!first_time) {
          this.helpText();
-         if (this._scene)
-            this.deleteChildren(this._scene);
+
+
+         JSROOT.Painter.DisposeThreejsObject(this._scene);
+
          if (this._tcontrols)
             this._tcontrols.dispose();
 
@@ -1942,34 +1944,6 @@
       this.Render3D();
    }
 
-   JSROOT.TGeoPainter.prototype.deleteChildren = function(obj) {
-      if ((typeof obj['children'] != 'undefined') && (obj['children'] instanceof Array)) {
-         for ( var i=obj.children.length-1; i>=0; i-- ) {
-            var ob = obj.children[i];
-            this.deleteChildren(ob);
-            try {
-               obj.remove(obj.children[i]);
-            } catch(e) {}
-            try {
-               ob.geometry.dispose();
-               ob.geometry = null;
-            } catch(e) {}
-            try {
-               ob.material.dispose();
-               ob.material = null;
-            } catch(e) {}
-            try {
-               ob.texture.dispose();
-               ob.texture = null;
-            } catch(e) {}
-            ob = null;
-            obj.children[i] = null;
-         }
-         obj.children = null;
-      }
-      obj = null;
-   }
-
    JSROOT.Painter.drawGeoObject = function(divid, obj, opt) {
       if (obj === null) return null;