ode uninitialized bugfix

src/main/java/electrosphere/engine/Main.java

@@ -42,6 +42,11 @@ public class Main {
     
 
     public static boolean running = true;
+
+    /**
+     * Tracks if ode has been initialized or not
+     */
+    static boolean initOde = false;
     
     //target amount of time per frame
     public static float targetFrameRate = 60.0f;
@@ -103,7 +108,10 @@ public class Main {
         }
 
         //init ODE
-        OdeHelper.initODE();
+        if(!initOde){
+            OdeHelper.initODE();
+            initOde = true;
+        }
         
         //world gen testing
         //gen terrain
@@ -437,7 +445,9 @@ public class Main {
             Globals.renderingEngine.clearGlobalState();
         }
         //used to signal threads to stop
-        Globals.threadManager.close();
+        if(Globals.threadManager != null){
+            Globals.threadManager.close();
+        }
         //reset globals for good measure (making sure no long-running threads can re-inject entities into scenes)
         Globals.resetGlobals();
         //shut down audio engine
@@ -449,7 +459,10 @@ public class Main {
             Globals.netMonitor.close();
         }
         //shutdown ode
-        OdeHelper.closeODE();
+        if(initOde){
+            OdeHelper.closeODE();
+            initOde = false;
+        }
     }
 
     static void sleep(int i) {