fixed worldgen and threadexecutor so that they will actually wait for the thread termination

src/net/torvald/terrarum/modulebasegame/WorldgenLoadScreen.kt

@@ -1,10 +1,12 @@
 package net.torvald.terrarum.modulebasegame
 
 import com.badlogic.gdx.ScreenAdapter
+import com.badlogic.gdx.graphics.Pixmap
+import com.badlogic.gdx.graphics.Texture
 import net.torvald.terrarum.AppLoader
 import net.torvald.terrarum.IngameInstance
 import net.torvald.terrarum.gameworld.GameWorld
-import net.torvald.util.HistoryArray
+import net.torvald.util.CircularArray
 import kotlin.math.roundToInt
 
 /**
@@ -25,7 +27,25 @@ class WorldgenLoadScreen(private var world: GameWorld, private var screenToLoad:
 
     private lateinit var screenLoadingThread: Thread
 
+    private lateinit var previewPixmap: Pixmap
+    private lateinit var previewTexture: Texture
 
-    private val messages = HistoryArray<String>(20)
+    private val messages = CircularArray<String>(20, true) // this many texts will be shown at once
 
+    override fun show() {
+        previewPixmap = Pixmap(previewWidth, previewHeight, Pixmap.Format.RGBA8888)
+        previewTexture = Texture(1, 1, Pixmap.Format.RGBA8888)
+    }
+
+    override fun render(delta: Float) {
+        previewTexture.dispose()
+        previewTexture = Texture(previewPixmap)
+
+        //
+    }
+
+    override fun dispose() {
+        previewPixmap.dispose()
+        previewTexture.dispose()
+    }
 }

src/net/torvald/terrarum/modulebasegame/worldgenerator/Terragen.kt

@@ -3,11 +3,8 @@ package net.torvald.terrarum.modulebasegame.worldgenerator
 import com.sudoplay.joise.Joise
 import com.sudoplay.joise.module.*
 import net.torvald.terrarum.AppLoader.printdbg
-import net.torvald.terrarum.LoadScreen
 import net.torvald.terrarum.blockproperties.Block
 import net.torvald.terrarum.concurrent.ThreadExecutor
-import net.torvald.terrarum.concurrent.ThreadParallel
-import net.torvald.terrarum.concurrent.mapToThreadPoolDirectly
 import net.torvald.terrarum.gameworld.GameWorld
 import java.util.concurrent.Future
 import kotlin.math.cos
@@ -31,7 +28,7 @@ class Terragen(world: GameWorld, seed: Long, params: Any) : Gen(world, seed, par
         // single-threaded impl because I couldn't resolve multithread memory corruption issue...
         genFuture = ThreadExecutor.submit {
             for (x in 0 until world.width) {
-                //printdbg(this, "Tile draw for y=$y")
+                printdbg(this, "Tile draw for x=$x")
                 for (y in 0 until world.height) {
                     val sampleTheta = (x.toDouble() / world.width) * TWO_PI
                     val sampleOffset = world.width / 8.0
@@ -45,6 +42,8 @@ class Terragen(world: GameWorld, seed: Long, params: Any) : Gen(world, seed, par
             }
         }
 
+        ThreadExecutor.join()
+
         printdbg(this, "Waking up Worldgen")
         //Worldgen.wake()
     }

src/net/torvald/terrarum/modulebasegame/worldgenerator/Worldgen.kt

@@ -1,6 +1,5 @@
 package net.torvald.terrarum.modulebasegame.worldgenerator
 
-import net.torvald.terrarum.AppLoader
 import net.torvald.terrarum.AppLoader.printdbg
 import net.torvald.terrarum.LoadScreen
 import net.torvald.terrarum.gameworld.GameWorld