网页CAD绘制任意线的代码如下(使用了Canvas API): HTML部分: - <canvas id="myCanvas"></canvas>
复制代码JavaScript部分: - var canvas = document.getElementById("myCanvas");
- var context = canvas.getContext("2d");
- var isDrawing = false;
- var startX, startY;
-
- // 监听鼠标按下事件
- canvas.addEventListener("mousedown", function(e) {
- startX = e.clientX - canvas.offsetLeft;
- startY = e.clientY - canvas.offsetTop;
- isDrawing = true;
- });
-
- // 监听鼠标移动事件
- canvas.addEventListener("mousemove", function(e) {
- if (!isDrawing) {
- return;
- }
- var x = e.clientX - canvas.offsetLeft;
- var y = e.clientY - canvas.offsetTop;
- context.beginPath();
- context.moveTo(startX, startY);
- context.lineTo(x, y);
- context.stroke();
- startX = x;
- startY = y;
- });
-
- // 监听鼠标松开事件
- canvas.addEventListener("mouseup", function(e) {
- isDrawing = false;
- });
复制代码通过监听鼠标的按下、移动和松开事件,在画布上实现了任意线的绘制功能,在线CAD有很多功能,需要更多咨询可以关注梦想CAD控件。
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