wip healing

half-earth/resources/tiles/tile_types/tile_type_collections/buildable_tiles.tres

@@ -1,8 +1,9 @@
-[gd_resource type="Resource" load_steps=3 format=2]
+[gd_resource type="Resource" load_steps=4 format=2]
 
 [ext_resource path="res://scripts/tile/TileTypeCollection.cs" type="Script" id=1]
 [ext_resource path="res://resources/tiles/tile_types/developed.tres" type="Resource" id=2]
+[ext_resource path="res://resources/tiles/tile_types/wild.tres" type="Resource" id=3]
 
 [resource]
 script = ExtResource( 1 )
-_resources = [ ExtResource( 2 ) ]
+_resources = [ ExtResource( 2 ), ExtResource( 3 ) ]

half-earth/scripts/EnvironmentSystem.cs

@@ -1,13 +1,13 @@
 using Godot;
 
-public class HeatSystem
+public class EnvironmentSystem
 {
     private readonly TileGrid _tiles;
     private readonly float _diffusionCoefficient;
 
     private float[] _nextTemperatures = null;
 
-    public HeatSystem(TileGrid tiles, float diffusionCoefficient)
+    public EnvironmentSystem(TileGrid tiles, float diffusionCoefficient)
     {
         _tiles = tiles;
         _diffusionCoefficient = diffusionCoefficient;
@@ -20,7 +20,6 @@ public class HeatSystem
         Diffuse();
     }
 
-
     private float TransferHeat(float t0, float alpha, float nx, float ny, float px, float py)
     {
         float d2tdx2 = nx - 2 * t0 + px;
@@ -56,13 +55,50 @@ public class HeatSystem
         if (!(tile.type is IDamageable damageable))
             return;
 
-        var surplus = tile.temperature - damageable.Threshold;
-        if (surplus < 0)
-            return;
+        var delta = tile.temperature - damageable.Threshold;
+        if (delta < 0)
+        {
+            // we want to heal based on how many wild tiles surround us
+            float healRate = 0.01f;
 
-        // TODO: parameterised balancing
-        tile.currentHealth -= surplus;
-        tile.currentHealth = Mathf.Clamp(tile.currentHealth, 0, 1);
+            // count neighbours
+        }
+        else
+        {
+            // take damage
+            // TODO: parameterised balancing
+            tile.currentHealth -= delta;
+            tile.currentHealth = Mathf.Clamp(tile.currentHealth, 0, 1);
+        }
+
+    }
+
+    public int GetNeighbourCount<T>(int x, int y) where T : TileType
+    {
+        int count = 0;
+
+        for (int i = -1; i < 1; i += 2)
+        {
+            for (int j = -1; j < 1; j += 2)
+            {
+                int xi = x + 1;
+                int yj = y + 1;
+
+                // assume tiles out side of bounds are the same type as this one
+                if (!_tiles.IsInBounds(xi, yj))
+                {
+                    count += 1;
+                    continue;
+                }
+
+                if (!(_tiles[xi, yj] is T))
+                    continue;
+
+                count++;
+            }
+        }
+
+        return count;
     }
 
     private void Diffuse()
@@ -96,5 +132,4 @@ public class HeatSystem
             _tiles[i] = tile;
         }
     }
-
 }

half-earth/scripts/WorldGrid.cs

@@ -21,7 +21,7 @@ public class WorldGrid : Node2D
         public ShaderMaterial material;
     }
     private TileView[] _tileViews;
-    private HeatSystem _heat;
+    private EnvironmentSystem _environment;
 
     // Called when the node enters the scene tree for the first time.
     public override void _Ready()
@@ -30,7 +30,7 @@ public class WorldGrid : Node2D
 
         GenerateCanvasItems(_tileGrid);
 
-        _heat = new HeatSystem(_tileGrid, DiffusionCoefficient);
+        _environment = new EnvironmentSystem(_tileGrid, DiffusionCoefficient);
     }
 
     #region Positioning
@@ -53,6 +53,7 @@ public class WorldGrid : Node2D
 
         var tile = _tileGrid[idx];
         tile.type = tileType;
+        tile = tileType.ApplySpawneffect(tile);
         _tileGrid[x, y] = tile;
     }
     #endregion
@@ -100,5 +101,5 @@ public class WorldGrid : Node2D
 
     public ShaderMaterial GetTileMaterial(int idx) => _tileViews[idx].material;
 
-    public void _on_Clock_OnTick(int ticks) => _heat.Process();
+    public void _on_Clock_OnTick(int ticks) => _environment.Process();
 }

half-earth/scripts/tile/TileType.cs

@@ -17,4 +17,6 @@ public class TileType : Resource
     public float HeatGeneration { get; private set; }
 
     public override string ToString() => Name;
+
+    public virtual Tile ApplySpawneffect(Tile tile) => tile;
 }

half-earth/scripts/tile/Wild.cs

@@ -4,4 +4,10 @@ public class Wild : TileType, IDamageable
 {
     [Export]
     public float Threshold { get; private set; }
+
+    public override Tile ApplySpawneffect(Tile tile)
+    {
+        tile.currentHealth = 0;
+        return tile;
+    }
 }

half-earth/scripts/ui/BuildModeUI.cs

@@ -20,10 +20,14 @@ public class BuildModeUI : Control
         _buildMode = GetNode<BuildMode>(_buildModePath);
 
         var buttonHeight = 40;
-        var tileType = _buildMode.BuildableTiles[0];
-        int x = 50;
 
-        SpawnButton(tileType, buttonHeight, ref x);
+        int x = 50;
+        int margin = 5;
+        foreach (var tt in _buildMode.BuildableTiles)
+        {
+            SpawnButton(tt, buttonHeight, ref x);
+            x += margin;
+        }
     }
 
     private void UpdateButtonToggleState(TileType tileType)