adopting Java 9/Kotlin 1.2

src/net/torvald/terrarum/console/CommandDict.kt

@@ -54,6 +54,7 @@ object CommandDict {
             "spawntapestry" to SpawnTapestry,
             "imtest" to JavaIMTest,
             "cheatmotherfuckernootnoot" to CheatWarnTest,
+            "spawnlunarlander" to SpawnPhysTestLunarLander,
 
 
             /* !! */"exportlayer" to ExportLayerData,

src/net/torvald/terrarum/console/SpawnPhysTestBall.kt

@@ -21,10 +21,7 @@ internal object SpawnPhysTestBall : ConsoleCommand {
             val yvel = if (args.size >= 4) args[3].toDouble() else 0.0
 
             val ball = PhysTestBall(Terrarum.ingame!!.world)
-            ball.setPosition(
-                    (mouseX + WorldCamera.x).toDouble(),
-                    (mouseY + WorldCamera.y).toDouble()
-            )
+            ball.setPosition(mouseX, mouseY)
             ball.elasticity = elasticity
             ball.applyForce(Vector2(xvel, yvel))
 
@@ -34,10 +31,7 @@ internal object SpawnPhysTestBall : ConsoleCommand {
             val elasticity = args[1].toDouble()
 
             val ball = PhysTestBall(Terrarum.ingame!!.world)
-            ball.setPosition(
-                    (mouseX + WorldCamera.x).toDouble(),
-                    (mouseY + WorldCamera.y).toDouble()
-            )
+            ball.setPosition(mouseX, mouseY)
             ball.elasticity = elasticity
 
             Terrarum.ingame!!.addNewActor(ball)

src/net/torvald/terrarum/console/SpawnPhysTestLunarLander.kt

@@ -0,0 +1,24 @@
+package net.torvald.terrarum.console
+
+import net.torvald.terrarum.Terrarum
+import net.torvald.terrarum.gameactors.PhysTestLuarLander
+import net.torvald.terrarum.worlddrawer.WorldCamera
+
+/**
+ * Created by minjaesong on 2018-01-18.
+ */
+internal object SpawnPhysTestLunarLander : ConsoleCommand {
+    override fun execute(args: Array<String>) {
+        val mouseX = Terrarum.mouseX
+        val mouseY = Terrarum.mouseY
+        val lander = PhysTestLuarLander(Terrarum.ingame!!.world)
+
+        lander.setPosition(mouseX, mouseY)
+
+        Terrarum.ingame!!.addNewActor(lander)
+    }
+
+    override fun printUsage() {
+        Echo("control it with arrow keys")
+    }
+}