Naive WFC kind of working

wfc/chunk.gd

@@ -0,0 +1,31 @@
+class_name Chunk extends Object
+## A Chunk of map data and bundled metadata, always aligned to CHUNK_WIDTH and CHUNK_HEIGHT
+## The default data values are 0, which means "NOT SET"
+## Chunks can be partially unset, to allow for prefabs
+## Any values of -1 are "NOT VALID"
+
+const CHUNK_WIDTH: int = 16
+const CHUNK_HEIGHT: int = 16
+
+var data: PackedInt32Array
+var x: int
+var y: int
+
+func _init(_x: int, _y: int):
+	assert(_x % CHUNK_WIDTH == 0)
+	assert(_y % CHUNK_HEIGHT == 0)
+	x = _x
+	y = _y
+	data = PackedInt32Array()
+	data.resize(CHUNK_WIDTH * CHUNK_HEIGHT)
+	data.fill(0)
+
+func get_tile(tile_x: int, tile_y: int) -> int:
+	if tile_x < 0 or tile_y < 0  or tile_x >= CHUNK_WIDTH or tile_y >= CHUNK_HEIGHT: return -1
+	return data[tile_y * CHUNK_WIDTH + tile_x]
+
+func set_tile(tile_x: int, tile_y: int, value: int) -> int:
+	assert(value > 0) #do NOT clear a tile with this function
+	if tile_x < 0 or tile_y < 0  or tile_x >= CHUNK_WIDTH or tile_y >= CHUNK_HEIGHT: return -1
+	data[tile_y * CHUNK_WIDTH + tile_x] = value
+	return value