Update WorldgenLoadScreen.kt, Terragen.kt, and WorldgenNoiseSandbox.kt

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

@@ -0,0 +1,31 @@
+package net.torvald.terrarum.modulebasegame
+
+import com.badlogic.gdx.ScreenAdapter
+import net.torvald.terrarum.AppLoader
+import net.torvald.terrarum.IngameInstance
+import net.torvald.terrarum.gameworld.GameWorld
+import net.torvald.util.HistoryArray
+import kotlin.math.roundToInt
+
+/**
+ * World loading screen with minecraft 1.14-style preview
+ *
+ * Created by minjaesong on 2019-11-09.
+ */
+class WorldgenLoadScreen(private var world: GameWorld, private var screenToLoad: IngameInstance) : ScreenAdapter() {
+
+    // a Class impl is chosen to make resize-handling easier, there's not much benefit making this a singleton anyway
+
+    companion object {
+        private const val WIDTH_RATIO = 0.6
+    }
+
+    private val previewWidth = (AppLoader.screenW * WIDTH_RATIO).roundToInt()
+    private val previewHeight = (AppLoader.screenW * WIDTH_RATIO * world.height / world.width).roundToInt()
+
+    private lateinit var screenLoadingThread: Thread
+
+
+    private val messages = HistoryArray<String>(20)
+
+}