mostly working, need netcode, en passant, and castling

Pawn.gd

@@ -0,0 +1,38 @@
+extends "res://Piece.gd"
+
+#TODO en passant
+
+func setup():
+	kind = KIND.PAWN
+	var sprite2d = get_node("Sprite2D")
+	if team == TEAM.WHITE:
+		sprite2d.region_rect = Rect2(234, 8, 26, 34)
+	elif team == TEAM.BLACK:
+		sprite2d.region_rect = Rect2(234, 53, 26, 33)
+
+func check_move(destination: Vector2i) -> bool:
+	var enemy_exists = false
+	var board_state = get_board_state()
+	if board_state.has(destination):
+		if board_state[destination].team == team:
+			return false
+		else:
+			enemy_exists = true
+
+	var dx = abs(destination.x - grid_pos.x)
+	var dy = abs(destination.y - grid_pos.y)
+
+	var forward = dx == 0 and dy == 1 and not enemy_exists
+	var diag = dx == 1 and dy == 1 and enemy_exists
+	var correct_direction = false
+	if team == TEAM.WHITE:
+		correct_direction = destination.y - grid_pos.y < 0
+	elif team == TEAM.BLACK:
+		correct_direction = destination.y - grid_pos.y > 0
+
+	if not enemy_exists and correct_direction and dy == 2:
+		var white_row = team == TEAM.WHITE and grid_pos.y == 6
+		var black_row = team == TEAM.BLACK and grid_pos.y == 1
+		return path_empty(destination) and (white_row or black_row)
+	
+	return correct_direction and (forward or diag)