,画布y内边距
*/
var R = 26, canvasWidth = 400, canvasHeight = 320, OffsetX = 30, OffsetY = 30...* */
var X = (canvasWidth - 2 * OffsetX - R * 2 * 3) / 2;
var Y...lastPoint.Y);
cxt.lineTo(touchPoint.X,touchPoint.Y);
cxt.stroke...cxt.fillStyle = "#ffffff";
cxt.beginPath();
cxt.arc(Point.X, Point.Y,...,canvasHeight);
Draw(cxt,circleArr,pwdArr,{X:touches.pageX,Y:touches.pageY});