adopting Java 9/Kotlin 1.2

src/net/torvald/terrarum/gameactors/PhysTestLuarLander.kt

@@ -0,0 +1,60 @@
+package net.torvald.terrarum.gameactors
+
+import com.badlogic.gdx.Gdx
+import com.badlogic.gdx.Input
+import com.badlogic.gdx.graphics.Color
+import com.badlogic.gdx.graphics.Texture
+import com.badlogic.gdx.graphics.g2d.SpriteBatch
+import net.torvald.terrarum.ModMgr
+import net.torvald.terrarum.gameworld.GameWorld
+
+/**
+ * Created by minjaesong on 2018-01-17.
+ */
+class PhysTestLuarLander(world: GameWorld) : ActorWithPhysics(world, RenderOrder.MIDTOP), Controllable {
+
+    private val texture = Texture(ModMgr.getGdxFile("basegame", "sprites/phystest_lunarlander.tga"))
+
+    override val hitbox: Hitbox
+
+    init {
+        hitbox = Hitbox(0.0, 0.0, 0.0, 0.0)
+        setHitboxDimension(texture.width, texture.height, 0, 0)
+
+        actorValue[AVKey.SPEED] = 8.0
+        avBaseMass = 18650.0
+    }
+
+    override fun run() {
+        super.run()
+    }
+
+    override fun update(delta: Float) {
+        super.update(delta)
+
+        if (Gdx.input.isKeyPressed(Input.Keys.UP)) {
+            controllerMoveDelta!!.y = avSpeedCap
+        }
+    }
+
+    override fun keyDown(keycode: Int): Boolean {
+        return true
+    }
+
+    override fun drawGlow(batch: SpriteBatch) {
+    }
+
+    override fun drawBody(batch: SpriteBatch) {
+        batch.color = Color.WHITE
+        batch.draw(texture, hitbox.startX.toFloat(), hitbox.endY.toFloat(), hitbox.width.toFloat(), -hitbox.height.toFloat())
+    }
+
+    override fun onActorValueChange(key: String, value: Any?) {
+        super.onActorValueChange(key, value)
+    }
+
+    override fun dispose() {
+        super.dispose()
+        texture.dispose()
+    }
+}