findNodeInOpen method
从Open列表中查找结点
Implementation
DFAStarNode? findNodeInOpen(DFTilePosition? position) {
if (position == null || _openList.length == 0) return null;
for (DFAStarNode node in _openList) {
if (node.position! == position) {
return node;
}
}
return null;
}