Ingame's Player is now mandatory; player spawn on right position

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

@@ -2,6 +2,7 @@
 package net.torvald.terrarum.gameworld
 
 import com.badlogic.gdx.graphics.Color
+import net.torvald.dataclass.Float16
 import net.torvald.terrarum.realestate.LandUtil
 import net.torvald.terrarum.blockproperties.BlockCodex
 import org.dyn4j.geometry.Vector2
@@ -34,6 +35,7 @@ class GameWorld(val width: Int, val height: Int) {
     var gravitation: Vector2 = Vector2(0.0, 9.8)
     /** 0.0..1.0+ */
     var globalLight = Color(0f,0f,0f,0f)
+    var averageTemperature = 288f // 15 deg celsius; simulates global warming
 
 
 
@@ -56,7 +58,7 @@ class GameWorld(val width: Int, val height: Int) {
         layerTerrainLowBits = PairedMapLayer(width, height)
         layerWallLowBits = PairedMapLayer(width, height)
 
-        layerThermal = MapLayerFloat(width / 2, height / 2)
+        layerThermal = MapLayerFloat(width / 2, height / 2, averageTemperature)
 
 
         time = WorldTime(
@@ -287,6 +289,12 @@ class GameWorld(val width: Int, val height: Int) {
     fun getWallDamage(x: Int, y: Int): Float =
             wallDamages[LandUtil.getBlockAddr(x, y)] ?: 0f
 
+
+    fun getTemperature(worldTileX: Int, worldTileY: Int): Float? {
+        return layerThermal.getValue((worldTileX fmod width) / 2, worldTileY / 2)
+    }
+
+
     companion object {
 
         @Transient val WALL = 0

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

@@ -10,6 +10,10 @@ import net.torvald.dataclass.Float16Bits
  */
 class MapLayerFloat(val width: Int, val height: Int) : Iterable<Float16Bits> {
 
+    constructor(width: Int, height: Int, init: Float) : this(width, height) {
+        data = Array(height) { Array(width, { Float16.fromFloat(init) }) }
+    }
+
     internal @Volatile var data: Array<Array<Float16Bits>> // in parallel programming: do not trust your register; always read freshly from RAM!
 
     init {
@@ -45,7 +49,7 @@ class MapLayerFloat(val width: Int, val height: Int) : Iterable<Float16Bits> {
         return if (x !in 0..width - 1 || y !in 0..height - 1)
             null
         else
-            data[y][x].toFloat()
+            Float16.toFloat(data[y][x])
     }
 
     internal fun setValue(x: Int, y: Int, value: Float) {

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

@@ -155,6 +155,12 @@ object WorldSimulator {
         }
     }
 
+
+    fun disperseHeat(delta: Float) {
+
+    }
+
+
     fun drawFluidMapDebug(batch: SpriteBatch) {
         batch.color = colourWater