Wpf动画从代码

本文关键字：代码 动画 Wpf | 更新日期: 2023-09-27 18:12:56

有一些类似的线程，但我没有找到我的问题的解决方案。这是我在这里的第一个帖子。
是这样的:

Viewport3D viewPort3D;
GeometryModel3D geometryModel = new GeometryModel3D();  
Transform3DGroup transform3DGroup = new Transform3DGroup();
...
// Rotation
RotateTransform3D rotateTransform3D = new RotateTransform3D();   
AxisAngleRotation3D axisAngleRotation3d = new AxisAngleRotation3D();  
axisAngleRotation3d.Axis = new Vector3D(0, 1, 0);  
axisAngleRotation3d.Angle = angle;  
rotateTransform3D.Rotation = axisAngleRotation3d;  
transform3DGroup.Children.Add(rotateTransform3D);  
// Translation  
TranslateTransform3D translateTransform3D = new TranslateTransform3D();  
translateTransform3D.OffsetX = offsetX;
transform3DGroup.Children.Add(translateTransform3D);  
// Adding transforms  
geometryModel.Transform = transform3DGroup;  
Model3DGroup model3DGroup = new Model3DGroup();
model3DGroup.Children.Add( image.getGeometryModel3D() );
modelVisual3D.Content = model3DGroup;
viewPort3D.Children.Add( modelVisual3D );

现在我想使用storyboard进行转换(因为稍后我想在storyboard中添加旋转功能):

Storyboard s = new Storyboard();
Transform3DGroup transform3DGroup = model3DGroup.Children.ElementAt(current).Transform as Transform3DGroup;
for (int j = 0; j < transform3DGroup.Children.Count; ++j)
{
   if (transform3DGroup.Children.ElementAt(j) is TranslateTransform3D)
   {
      TranslateTransform3D translation = transform3DGroup.Children.ElementAt(j) as TranslateTransform3D;
      DoubleAnimation doubleAnimation = new DoubleAnimation();
      doubleAnimation.From = 0;
      doubleAnimation.To = 2;
      doubleAnimation.Duration = new Duration(TimeSpan.FromSeconds(1));
      doubleAnimation.AutoReverse = true;
      doubleAnimation.RepeatBehavior = RepeatBehavior.Forever;
      s.Children.Add(doubleAnimation);
      s.Duration = new Duration(TimeSpan.FromSeconds(1));
      Storyboard.SetTarget(doubleAnimation, model3DGroup.Children.ElementAt(current));
      Storyboard.SetTargetProperty(doubleAnimation, new PropertyPath("(Model3D.Transform).(Transform3DGroup.Children)[1].(TranslateTransform3D.OffsetX)"));
      s.Begin(); // Exception during the execution.
   }
}

最后一行异常:

路径中的'[Unknown]'属性值"(Model3D.Transform)。(Transform3DGroup.Children)[1]。(TranslateTransform3D.OffsetX) '指向的不可变实例"System.Windows.Media.Media3D.TranslateTransform3D"。

我使用PropertyPath类似于在blend 4中生成的路径。

谢谢你的帮助。

Wpf动画从代码

我认为，因为translate transform 3d是一个不可变的实例，所以必须指出，在渲染/翻译发生时，它应该是可变的

我想

  1. 我们可以将x:Name提供给不可变的TranslateTransform3D对象，使其可变

。

        NameScope.SetNameScope(this, new NameScope());
        this.RegisterName("AxisRotation", MyAxisRotation3DObject.Rotation);
        this.RegisterName("TranslateTransformation", MyTranslation3DObject);

通过这种方式，我们给轴旋转3D和平移变换3D对象命名，然后在双重动画中将它们称为Storyboard.SetTargetName(.., "AxisRotation")和Storyboard.SetTargetName(.., "TranslateTransformation")，并访问它们的直接属性，如Storyboard.SetTargetProperty(.., new PropertyPath("Angle"))和Storyboard.SetTargetProperty(.., new PropertyPath("OffsetX")) resp

您的错误说明TranslateTransform3D是不可变的，这意味着，它不能被改变。当你试图给它的一个属性动画时，就会出现错误

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