WPF如何绘制光滑连续贝塞尔曲线示例代码

/// <summary> /// 获得贝塞尔曲线 /// </summary> /// <param name="currentPt">当前点</param> /// <param name="lastPt">上一个点</param> /// <param name="nextPt1">下一个点1</param> /// <param name="nextPt2">下一个点2</param> /// <returns></returns> private BezierSegment GetBezierSegment(Point currentPt, Point lastPt, Point nextPt1, Point nextPt2) {  //计算中点  var lastC = GetCenterPoint(lastPt, currentPt);  var nextC1 = GetCenterPoint(currentPt, nextPt1); //贝塞尔控制点  var nextC2 = GetCenterPoint(nextPt1, nextPt2);  //计算相邻中点连线跟目的点的垂足  //效果并不算太好，因为可能点在两个线上或者线的延长线上，计算会有误差  //所以就直接使用中点平移方法。  //var C1 = GetFootPoint(lastC, nextC1, currentPt);  //var C2 = GetFootPoint(nextC1, nextC2, nextPt1);  //计算“相邻中点”的中点  var c1 = GetCenterPoint(lastC, nextC1);  var c2 = GetCenterPoint(nextC1, nextC2);  //计算【"中点"的中点】需要的点位移  var controlPtOffset1 = currentPt - c1;  var controlPtOffset2 = nextPt1 - c2;  //移动控制点  var controlPt1 = nextC1 + controlPtOffset1;  var controlPt2 = nextC1 + controlPtOffset2;  //如果觉得曲线幅度太大，可以将控制点向当前点靠近一定的系数。  controlPt1 = controlPt1 + 0 * (currentPt - controlPt1);  controlPt2 = controlPt2 + 0 * (nextPt1 - controlPt2);  var bzs = new BezierSegment(controlPt1, controlPt2, nextPt1, true);  return bzs; }