如何以编程方式为路径设置动画 [英] how to animate path programmatically

问题描述

我有一个x，y坐标列表?

i have a list of coordinate of x, y?

我不知道M代表什么吗?

i do not know M stand for?

我猜是M，x，y

但无法将字符串传递给animationPath.Figures，我看到xaml是字符串

but can not pass string to animationPath.Figures, i see that xaml it is a string

 PathGeometry animationPath = new PathGeometry();
            //PathFigure pFigure = new PathFigure();
            System.Text.StringBuilder sb = new System.Text.StringBuilder();
            sb.AppendLine(@" 
              M, 0.9635179096, 0.2676438638,
              M, 0.9563515710, 0.2922185356,
              M, 0.9486832981, 0.3162277660,
              M, 0.9405538997, 0.3396444638,
              M, 0.9320046715, 0.3624462612,
              M, 0.9230769231, 0.3846153846,
              M, 0.9138115486, 0.4061384660,
              M, 0.9042486468, 0.4270063054,
              M, 0.8944271910, 0.4472135955,
              M, 0.8843847528, 0.4667586196,
              M, 0.8741572761, 0.4856429312,
              M, 0.8637789009, 0.5038710255,
              M, 0.8532818337, 0.5214500094,
              M, 0.8426962598, 0.5383892771,
              M, 0.8320502943, 0.5547001962,
              M, 0.8213699657, 0.5703958095,
             M, -0.8106792284, -0.5854905538,
             M, -0.8000000000, -0.6000000000,
             M, -0.7893522174, -0.6139406135,
             M, -0.7787539091, -0.6273295379,
             M, -0.7682212796, -0.6401843996,
             M, -0.7577688024, -0.6525231354,
             M, -0.7474093187, -0.6643638388,
             M, -0.7371541402, -0.6757246285,
             M, -0.7270131526, -0.6866235329,
             M, -0.7169949188, -0.6970783933,
             M, -0.7071067812, -0.7071067812,
             M, -0.6973549597, -0.7167259310,
             M, -0.6877446478, -0.7259526841,
             M, -0.6782801028, -0.7348034445,
             M, -0.6689647317, -0.7432941462,
             M, -0.6598011732, -0.7514402251,
             M, -0.6507913733, -0.7592566025,
             M, -0.6419366566, -0.7667576729,
             M, -0.6332377903, -0.7739572991,
             M, -0.6246950476, -0.7808688094,
             M, -0.6163082616, -0.7875050011,
             M, -0.6080768777, -0.7938781461,
             M, -0.6000000001, -0.7999999999,
             M, -0.5920764340, -0.8058818129,
             M, -0.5843047258, -0.8115343415,
             M, -0.5766831975, -0.8169678633,
             M, -0.5692099789, -0.8221921916,
             M, -0.5618830356, -0.8272166912,
             M, -0.5547001962, -0.8320502943,
             M, -0.5476591746, -0.8367015169,
             M, -0.5407575912, -0.8411784754,
             M, -0.5339929915, -0.8454889030,
             M, -0.5273628618, -0.8496401662,
             M, -0.5208646456, -0.8536392804,
             M, -0.5144957554, -0.8574929258,
             M, -0.5082535846, -0.8612074626,
             M, -0.5021355174, -0.8647889466,
             M, -0.4961389384, -0.8682431421,
             M, -0.4902612396, -0.8715755372,
             M, -0.4844998279, -0.8747913561,
             M, -0.4788521307, -0.8778955729,
             M, -0.4733156006, -0.8808929233,
             M, -0.4678877204, -0.8837879164,
             M, -0.4625660066, -0.8865848462,
             M, -0.4573480127, -0.8892878023,
             M, -0.4522313309, -0.8919006802,
             M, -0.4472135955, -0.8944271910,
             M, -0.4422924841, -0.8968708706,
             M, -0.4374657188, -0.8992350888,
             M, -0.4327310676, -0.9015230574,
             M, -0.4280863448, -0.9037378389,
             M, -0.4235294117, -0.9058823529,
             M, -0.4190581774, -0.9079593845,
             M, -0.4146705982, -0.9099715902,
             M, -0.4103646774, -0.9119215052, 
             M, -0.4061384661, -0.9138115486, 
             M, -0.4019900620, -0.9156440302");
            animationPath.Figures = sb.ToString();
            DoubleAnimationUsingPath pathAnimation1 = new DoubleAnimationUsingPath();
            pathAnimation1.PathGeometry = animationPath;
            Storyboard s = new Storyboard();            
            //s.Children.Add(widthAnimation1);
            //s.Children.Add(heightAnimation1);
            //s.Children.Add(marginAnimation);
            s.RepeatBehavior = RepeatBehavior.Forever;
            s.Duration = new Duration(TimeSpan.FromSeconds(2));

新建

推荐答案

PathGeometry的Figures属性类型为PathFigureCollection，因此只能设置为PathFigureCollection. XAML解析器基于字符串为您创建PathFigureCollection.您可以使用PathFigureCollection.Parse进行相同的操作 方法:

The Figures property of an PathGeometry is of type PathFigureCollection and can thus only be set to a PathFigureCollection. The XAML parser creates a PathFigureCollection for you based on a string. You can do the same using the PathFigureCollection.Parse method:

animationPath.Figures = PathFigureCollection.Parse(sb.ToString());

您的格式无效.这些点应仅以空格分隔，坐标应以逗号分隔，例如:

Your format is invalid though. The points should be separated by only a space and the coordinates by a comma, e.g:

            sb.AppendLine(@" 
              M 0.9635179096, 0.2676438638
              M 0.9563515710, 0.2922185356
              M 0.9486832981, 0.3162277660
              M 0.9405538997, 0.3396444638
              M 0.9320046715, 0.3624462612
              M 0.9230769231, 0.3846153846
              M 0.9138115486, 0.4061384660
              M 0.9042486468, 0.4270063054
              M 0.8944271910, 0.4472135955
              M 0.8843847528, 0.4667586196");

>>我不知道M代表什么?

大写字母M表示新当前点的绝对位置.请参考MSDN以获取更多信息: https://msdn.microsoft.com/en-us/library/ms747393 (v = vs.110).aspx

The capital M indicates an absolute location for the new current point. Please refer to MSDN for more information: https://msdn.microsoft.com/en-us/library/ms747393(v=vs.110).aspx

希望有帮助.

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