Biome generation

game/scenes/Levels/location_level.gd

@@ -24,6 +24,7 @@ var _tracked_node: Node3D
 var _tile_nodes: Dictionary = {}
 var _camera_start_offset := Vector3(0.0, 6.0, 10.0)
 var _border_material: StandardMaterial3D
+var _biome_materials: Dictionary = {}
 var _known_locations: Dictionary = {}
 var _locations_loaded := false
 var _character_id := ""
@@ -111,7 +112,7 @@ func _rebuild_tiles(center: Vector2i) -> void:
 			wanted_keys[coord] = true
 			if _tile_nodes.has(coord):
 				continue
-			_spawn_tile(coord, _get_location_name(coord))
+			_spawn_tile(coord, _get_location_name(coord), _get_location_biome_key(coord))
 
 	for key in _tile_nodes.keys():
 		if wanted_keys.has(key):
@@ -122,7 +123,7 @@ func _rebuild_tiles(center: Vector2i) -> void:
 		_tile_nodes.erase(key)
 
 
-func _spawn_tile(coord: Vector2i, location_name: String) -> void:
+func _spawn_tile(coord: Vector2i, location_name: String, biome_key: String) -> void:
 	var tile_root := Node3D.new()
 	tile_root.name = "Tile_%d_%d" % [coord.x, coord.y]
 	tile_root.position = _coord_to_world(coord)
@@ -141,6 +142,9 @@ func _spawn_tile(coord: Vector2i, location_name: String) -> void:
 	var tile := _block.duplicate() as MeshInstance3D
 	tile.name = "TileMesh"
 	tile.visible = true
+	var biome_material := _get_biome_material(tile, biome_key)
+	if biome_material:
+		tile.material_override = biome_material
 	tile_body.add_child(tile)
 
 	tile.add_child(_create_tile_border())
@@ -206,6 +210,7 @@ func _ensure_selected_location_exists(coord: Vector2i) -> void:
 	_known_locations[coord] = {
 		"id": "",
 		"name": _selected_location_name(coord),
+		"biomeKey": "plains",
 		"resources": []
 	}
 
@@ -277,6 +282,7 @@ func _load_existing_locations() -> void:
 		_known_locations[coord] = {
 			"id": String(location.get("id", "")).strip_edges(),
 			"name": location_name,
+			"biomeKey": String(location.get("biomeKey", "plains")).strip_edges(),
 			"resources": _parse_location_resources(location.get("resources", []))
 		}
 		loaded_count += 1
@@ -433,6 +439,11 @@ func _get_location_name(coord: Vector2i) -> String:
 	return String(location_data.get("name", "Location %d,%d" % [coord.x, coord.y]))
 
 
+func _get_location_biome_key(coord: Vector2i) -> String:
+	var location_data := _get_location_data(coord)
+	return String(location_data.get("biomeKey", "plains")).strip_edges()
+
+
 func _parse_location_resources(resources_value: Variant) -> Array:
 	var results: Array = []
 	if typeof(resources_value) != TYPE_ARRAY:
@@ -465,3 +476,32 @@ func _update_location_resource(coord: Vector2i, resource_key: String, remaining_
 			updated_resources.append(resource)
 	location_data["resources"] = updated_resources
 	_known_locations[coord] = location_data
+
+
+func _get_biome_material(tile: MeshInstance3D, biome_key: String) -> Material:
+	var normalized_biome := biome_key if not biome_key.is_empty() else "plains"
+	if _biome_materials.has(normalized_biome):
+		return _biome_materials[normalized_biome]
+
+	var source_material := tile.get_active_material(0)
+	if source_material is StandardMaterial3D:
+		var material := (source_material as StandardMaterial3D).duplicate() as StandardMaterial3D
+		material.albedo_color = _get_biome_color(normalized_biome)
+		_biome_materials[normalized_biome] = material
+		return material
+
+	return source_material
+
+
+func _get_biome_color(biome_key: String) -> Color:
+	match biome_key:
+		"forest":
+			return Color(0.36, 0.62, 0.34, 1.0)
+		"wetlands":
+			return Color(0.28, 0.52, 0.44, 1.0)
+		"rocky":
+			return Color(0.52, 0.50, 0.44, 1.0)
+		"desert":
+			return Color(0.76, 0.67, 0.38, 1.0)
+		_:
+			return Color(0.56, 0.72, 0.38, 1.0)