Use TileMapLayer in MapGenerator to display path

1 files changed, 69 insertions, 0 deletions

diff --git a/scripts/map_generator.gd b/scripts/map_generator.gd
new file mode 100644
index 0000000..328bce1
--- /dev/null
+++ b/scripts/map_generator.gd
@@ -0,0 +1,69 @@
+extends Node2D
+
+@export var grid_width : int = 20
+@export var grid_height : int = 14
+@export var tile_size : int = 16
+
+@onready var tile_map : TileMapLayer = $TileMapLayer
+
+var _pg : PathGenerator
+var path_straight_atlas_coords : Vector2i = Vector2i(8, 1)
+var path_corner_atlas_coords : Vector2i = Vector2i(9, 1)
+var path_empty_atlas_coords : Vector2i = Vector2i(0, 0)
+
+enum TileTransform {
+	ROTATE_0 = 0,
+	ROTATE_90 = TileSetAtlasSource.TRANSFORM_TRANSPOSE | TileSetAtlasSource.TRANSFORM_FLIP_H,
+	ROTATE_180 = TileSetAtlasSource.TRANSFORM_FLIP_H | TileSetAtlasSource.TRANSFORM_FLIP_V,
+	ROTATE_270 = TileSetAtlasSource.TRANSFORM_TRANSPOSE | TileSetAtlasSource.TRANSFORM_FLIP_V,
+}
+
+func _ready() -> void:
+	_pg = PathGenerator.new(grid_width, grid_height)
+	_display_path()
+
+func _display_path():
+	var path : Array[Vector2i] = []
+	while path.size() < 35:
+		path = _pg.generate_path()
+
+	for i in path:
+		var score : int = _get_tile_score(path, i)
+
+		var atlas_coords : Vector2i = path_empty_atlas_coords
+		var rot : TileTransform = TileTransform.ROTATE_0
+
+		match score:
+			2, 8, 10:
+				atlas_coords = path_straight_atlas_coords
+				rot = TileTransform.ROTATE_90
+			1, 4, 5:
+				atlas_coords = path_straight_atlas_coords
+			3:
+				atlas_coords = path_corner_atlas_coords
+				rot = TileTransform.ROTATE_270
+			6:
+				atlas_coords = path_corner_atlas_coords
+			12:
+				atlas_coords = path_corner_atlas_coords
+				rot = TileTransform.ROTATE_90
+			9:
+				atlas_coords = path_corner_atlas_coords
+				rot = TileTransform.ROTATE_180
+
+		_display_tile(atlas_coords, rot, i)
+
+func _display_tile(coords : Vector2i, rot : TileTransform, pos : Vector2i):
+	tile_map.set_cell(pos, 0, coords, rot)
+
+func _get_tile_score(path : Array[Vector2i], tile : Vector2i) -> int:
+	var score : int = 0
+	var x : int = tile.x
+	var y : int = tile.y
+	
+	score += 1 if path.has(Vector2i(x, y - 1)) else 0
+	score += 2 if path.has(Vector2i(x + 1, y)) else 0
+	score += 4 if path.has(Vector2i(x, y + 1)) else 0
+	score += 8 if path.has(Vector2i(x - 1, y)) else 0
+
+	return score