<Canvas>
<!-- 原图 -->
<Rectangle Stroke="Black" Width="100" Height="50" Canvas.Left="250" Canvas.Top="50" />
<!-- 绕矩形左上角点(0, 0)点旋转,注意是矩形坐标系 -->
<Rectangle Stroke="Green" Width="100" Height="50" Canvas.Left="250" Canvas.Top="50">
<Rectangle.RenderTransform>
<RotateTransform Angle="90" CenterX="50" CenterY="25" />
</Rectangle.RenderTransform>
</Rectangle>
<!-- 绕矩形中心点(50, 25)点旋转,注意是矩形坐标系 -->
<Rectangle Stroke="Green" Width="100" Height="50" Canvas.Left="250" Canvas.Top="50">
<Rectangle.RenderTransform>
<RotateTransform Angle="90" CenterX="50" CenterY="25" />
</Rectangle.RenderTransform>
</Rectangle>
<!-- 绕矩形中心点(50, 150)点旋转,注意是矩形坐标系,也是Canvas坐标系的中心点(300, 225) -->
<Rectangle Stroke="BlueViolet" Width="100" Height="50" Canvas.Left="250" Canvas.Top="50" RenderTransformOrigin="0,0">
<Rectangle.RenderTransform>
<RotateTransform Angle="90" CenterX="50" CenterY="150" />
</Rectangle.RenderTransform>
</Rectangle>
<Path Stroke="Black" StrokeThickness="4">
<Path.Data>
<LineGeometry StartPoint="250,50" EndPoint="300,200"></LineGeometry>
</Path.Data>
</Path>
<Ellipse Width="5" Height="5" Fill="Red" Canvas.Left="300" Canvas.Top="200"></Ellipse>
<!-- 绕矩形中心点(50, 150)点旋转,注意是矩形坐标系,也是Canvas坐标系的中心点(300, 225) -->
<Rectangle Stroke="GreenYellow" Width="100" Height="50" Canvas.Left="250" Canvas.Top="50">
<Rectangle.RenderTransform>
<RotateTransform Angle="180" CenterX="50" CenterY="150" />
</Rectangle.RenderTransform>
</Rectangle>
<!-- 绕矩形中心点(50, 150)点旋转,注意是矩形坐标系,也是Canvas坐标系的中心点(300, 225) -->
<Rectangle Stroke="SaddleBrown" Width="100" Height="50" Canvas.Left="250" Canvas.Top="50">
<Rectangle.RenderTransform>
<RotateTransform Angle="270" CenterX="50" CenterY="150" />
</Rectangle.RenderTransform>
</Rectangle>
</Canvas>
如图,如果Rectangle的RenderTransformOrigin="0,0" CenterX=50 CenteY=150就是围绕着红点为中心,黄线为半径将黄线另一头的点选择相应的角度,如果RenderTransformOrigin!="0,0"则则以红点和RenderTransformOrigin连起来的线为半径旋转相应的角度 (注意RenderTransformOrigin="0,0" CenterX=50 CenteY=150的点的位置都是相对于其所在的Rectangle 的)
<Rectangle Stroke="Black" Width="50" Height="50">
</Rectangle>
<Rectangle Stroke="Black" Width="50" Height="50">
<Rectangle.RenderTransform>
<TransformGroup>
<RotateTransform Angle="10" CenterX="50" CenterY="50"></RotateTransform>
</TransformGroup>
</Rectangle.RenderTransform>
</Rectangle>
<Rectangle x:Name="test" Stroke="Black" Width="50" Height="50">
<Rectangle.RenderTransform>
<TransformGroup>
<TranslateTransform X="50"></TranslateTransform>
<RotateTransform Angle="10" CenterX="50" CenterY="50"></RotateTransform>
</TransformGroup>
</Rectangle.RenderTransform>
</Rectangle>
由这个例子中test矩形得知无论
<TranslateTransform X="50"></TranslateTransform>如何设置CenterX和CenterY都是以没改变前的图为标准的
其实不管CenterX Center如何设置,几何图形旋转的角度都一样的,只是旋转后的位置不同