delete supercell

js/fea/DMASuperCell.js

@@ -38,9 +38,11 @@ DMASuperCell.prototype.setScale = function(scale){
 };
 
 DMASuperCell.prototype.destroy = function(){
+    if (this.destroyStarted) return;//prevents loop destroy from cells
+    this.destroyStarted = true;
     dmaGlobals.three.sceneRemove(this.mesh);
     _.each(this.cells, function(cell){
-        if (cell) cell.destroy();
+        if (cell && !cell.destroyStarted) dmaGlobals.lattice.removeCell(cell);
     });
     this.cells = null;
     this.mesh = null;

js/fea/DmaCell.js

@@ -239,6 +239,8 @@ DMACell.prototype._initBeams = function(nodes, faces){
 };
 
 DMACell.prototype.destroy = function(){
+    if (this.destroyStarted) return;
+    this.destroyStarted = true;
     if (this.cellMesh) {
         dmaGlobals.three.sceneRemove(this.cellMesh, this._sceneType(this.indices));
         this.cellMesh.myParent = null;
@@ -251,7 +253,10 @@ DMACell.prototype.destroy = function(){
     this.indices = null;
     this.nodes = null;
     this.beams = null;
-    this.superCell = null;
+    if (this.superCell) {
+        this.superCell.destroy();
+        this.superCell = null;
+    }
     this.superCellIndex = null;
     this.superCellLength = null;
 };