javascript,function aStar(startNode, endNode, graph) {, let openSet = [startNode];, let cameFrom = new Map();, , let gScore = new Map();, gScore.set(startNode, 0);, , let fScore = new Map();, fScore.set(startNode, heuristic(startNode, endNode));, , while (openSet.length > 0) {, let current = openSet.reduce((a, b) => fScore.get(a)< fScore.get(b) ? a : b);, , if (current === endNode) {, return reconstructPath(cameFrom, current);, }, , openSet = openSet.filter(node => node !== current);, , for (let neighbor of graph.getNeighbors(current)) {, let tentativeGScore = gScore.get(current) + graph.getCost(current, neighbor);, , if (!gScore.has(neighbor) || tentativeGScore< gScore.get(neighbor)) {, cameFrom.set(neighbor, current);, gScore.set(neighbor, tentativeGScore);, fScore.set(neighbor, tentativeGScore + heuristic(neighbor, endNode));, , if (!openSet.includes(neighbor)) {, openSet.push(neighbor);, }, }, }, }, , return null; // No path found,},,function heuristic(nodeA, nodeB) {, // Example heuristic function (Manhattan distance), return Math.abs(nodeA.x nodeB.x) + Math.abs(nodeA.y nodeB.y);,},,function reconstructPath(cameFrom, current) {, let totalPath = [current];, while (cameFrom.has(current)) {, current = cameFrom.get(current);, totalPath.unshift(current);, }, return totalPath;,},
``,,这个代码实现了A*算法的基本逻辑,包括开放集管理、代价计算以及路径重建。你可以根据具体需求调整启发函数和其他细节。text-align: center;
来水平居中文本或内联元素:, ``html,,这是一个居中的段落。,,
`,,2. 使用
margin: auto;和固定宽度来水平居中块级元素:,
`html,,这是一个居中的块级元素。,,
`,,3. 使用Flexbox来水平和垂直居中元素:,
`html,,这是一个水平和垂直居中的段落。,,
`,,4. 使用Grid布局来水平和垂直居中元素:,
`html,,这是一个居中的段落。,,
``,,这些方法可以根据具体需求选择使用。Powered By Z-BlogPHP 1.7.3