q&d hack to circumvent the dangling pointer issue #26

src/net/torvald/terrarum/TitleScreen.kt

@@ -253,7 +253,9 @@ class TitleScreen(val batch: SpriteBatch) : Screen {
         gdxClearAndSetBlend(.64f, .754f, .84f, 1f)
 
 
-        IngameRenderer.invoke(gamePaused = false, world = demoWorld, uisToDraw = uiContainer)
+        if (!demoWorld.disposed) { // FIXME q&d hack to circumvent the dangling pointer issue #26
+            IngameRenderer.invoke(gamePaused = false, world = demoWorld, uisToDraw = uiContainer)
+        }
 
 
         batch.inUse {

src/net/torvald/terrarum/gameworld/BlockLayer.kt

@@ -12,6 +12,7 @@ import net.torvald.terrarum.AppLoader.printdbg
  */
 open class BlockLayer(val width: Int, val height: Int) : Disposable {
 
+    // using unsafe pointer gets you 100 fps, whereas using directbytebuffer gets you 90
     private val ptr = UnsafeHelper.allocate(width * height * BYTES_PER_BLOCK)
 
     //private val directByteBuffer: ByteBuffer

src/net/torvald/terrarum/gameworld/GameWorld.kt

@@ -93,6 +93,9 @@ open class GameWorld : Disposable {
     var generatorSeed: Long = 0
         internal set
 
+    var disposed = false
+        private set
+
 
     constructor(worldIndex: Int, width: Int, height: Int, creationTIME_T: Long, lastPlayTIME_T: Long, totalPlayTime: Int) {
         if (width <= 0 || height <= 0) throw IllegalArgumentException("Non-positive width/height: ($width, $height)")
@@ -461,6 +464,8 @@ open class GameWorld : Disposable {
         layerWall.dispose()
         layerTerrain.dispose()
         //nullWorldInstance?.dispose() // must be called ONLY ONCE; preferably when the app exits
+
+        disposed = true
     }
 
     companion object {