WPF TranslateTransform从画布中的旋转对象到另一个画布中的固定对象

Question

我在我正在建造的纸牌游戏应用程序中使用了三个画布。一个是主帆布，其他两个作为儿童画布（一个静态和一个将旋转）：

在这个示例应用程序中，我想将RotatingEl移动到StaticEl上的位置：

当我单击“移动”按钮时，它按预期工作：

现在，我想旋转RotatingCanvas并仍然将RotatingEl移动到StaticEl位置并调整旋转以仍然匹配StaticEl的角度：

当我尝试时，它移动到错误的位置：

以下是移动按钮上的代码点击：

GeneralTransform generalTransformStaticEl = StaticEl.TransformToVisual(MainCanvas);
        Point pointstatic = generalTransformStaticEl.Transform(new Point()); 
        GeneralTransform generalTransformRotEl = RotatingEl.TransformToVisual(MainCanvas);
        Point pointrot = generalTransformRotEl.Transform(new Point());

        double distancecalcX = pointstatic.X - pointrot.X;
        double distancecalcY = pointstatic.Y - pointrot.Y;

        DoubleAnimation ELMoveY = new DoubleAnimation();

        ELMoveY.From = Canvas.GetTop(RotatingEl);
        ELMoveY.To = Canvas.GetTop(RotatingEl)+(distancecalcY);
        ELMoveY.Duration = new Duration(TimeSpan.FromSeconds(1.0));

        DoubleAnimation ELMoveX = new DoubleAnimation();

        ELMoveX.From = Canvas.GetLeft(RotatingEl);
        ELMoveX.To = Canvas.GetLeft(RotatingEl)+(distancecalcX);
        ELMoveX.Duration = new Duration(TimeSpan.FromSeconds(1.0));

        RotatingEl.BeginAnimation(Canvas.LeftProperty, ELMoveX);
        RotatingEl.BeginAnimation(Canvas.TopProperty, ELMoveY);

如何调整动画的“To”以将Rotated canvas的RotatingEl移动到静态StaticEl的位置并调整RotatingEl的旋转以匹配StaticEl的方向？

Answer 1

我找到了自己的解决方案。如果有人可能感兴趣，这里是更新的代码：

double foundangle = 0;
        //verify an actual transform group is there before getting rotate angle
        if (RotatingCanvas.RenderTransform.Value.ToString() != "Identity")
        {
            RotateTransform rt = (RotatingCanvas.RenderTransform as TransformGroup).Children[2] as RotateTransform;
            foundangle = rt.Angle;
        }
        RotateTransform rottrans = new RotateTransform(foundangle*-1);
        RotatingEl.RenderTransform = rottrans;
        GeneralTransform generalTransformStaticEl = StaticEl.TransformToVisual(RotatingCanvas);
        Point pointstatic = generalTransformStaticEl.Transform(new Point());

        DoubleAnimation ELMoveY = new DoubleAnimation();

        ELMoveY.From = Canvas.GetTop(RotatingEl);
        ELMoveY.To = pointstatic.Y;
        ELMoveY.Duration = new Duration(TimeSpan.FromSeconds(1.0));

        DoubleAnimation ELMoveX = new DoubleAnimation();

        ELMoveX.From = Canvas.GetLeft(RotatingEl);
        ELMoveX.To = pointstatic.X;
        ELMoveX.Duration = new Duration(TimeSpan.FromSeconds(1.0));

        RotatingEl.BeginAnimation(Canvas.LeftProperty, ELMoveX);
        RotatingEl.BeginAnimation(Canvas.TopProperty, ELMoveY);

generalTransformStaticEl需要从旋转的画布而不是非旋转的MainCanvas进行坐标。对旋转的调整只是获取旋转画布的当前旋转角度并乘以-1以与静态矩形对齐