使用 HTML5 检测单击贝塞尔曲线路径形状
要在单击时检测Bezier路径形状,请尝试以下代码-
示例
var l = boxes.length; for (var i = l-1; i >= 0; i--) { drawshape(gctx, boxes[i], 'black', 'black'); var imgData = gctx.getImageData(mx, my, 1, 1); var index = (mx + my * imgData.width) * 4; if (imgData.data[3] > 0) { mySel = boxes[i]; offsetx = mx - mySel.x; offsety = my - mySel.y; mySel.x= mx - offsetx; mySel.y= my - offsety; isDrag = true; canvas.onmousemove= myMove; invalidate(); clear(gctx); return; } }