Resolving issues #16 and #20

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

@@ -0,0 +1,29 @@
+package net.torvald.terrarum.gameworld
+
+import net.torvald.terrarum.gameactors.ActorID
+
+/**
+ * This world is economically isolated system. Economy will be important to make player keep playing,
+ * when all the necessary contents are set and implemented to the production.
+ *
+ * Created by SKYHi14 on 2017-04-23.
+ */
+class GameEconomy {
+
+    val transactionHistory = TransanctionHistory()
+
+}
+
+class TransanctionHistory {
+
+    private val entries = ArrayList<TransanctionHistory>()
+
+    /**
+     * @param to set 0 to indicate the money was lost to void
+     */
+    data class TransactionEntry(val from: ActorID, val to: ActorID, val amount: Long) {
+        override fun toString() = "$from -> $to; $amount"
+    }
+
+}
+

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

@@ -34,10 +34,18 @@ class GameWorld(val width: Int, val height: Int) {
     var gravitation: Vector2 = Vector2(0.0, 9.8)
     /** RGB in Integer */
     var globalLight: Int = 0
+
+
+
     val time: WorldTime
+    val economy = GameEconomy()
+
+
 
     var generatorSeed: Long = 0
 
+
+
     init {
         this.spawnX = width / 2
         this.spawnY = 200