WPF 矩形变换
我正在尝试使用以下代码将 RotateTransform 应用于 Rect 对象。
Rect transformed = this.Rectangle;
transformed.Transform(this.rotateTransform.Value);
DrawingVisual visual = new DrawingVisual();
DrawingContext context = visual.RenderOpen();
context.DrawRectangle(null, new Pen(Brushes.Blue, 2), transformed);
context.Close();
canvas.Children.Add(visual);
但矩形没有旋转。但是，当我将转换推送到 DrawingContext 时（如以下代码所示），矩形会正确转换。
Rect transformed = this.Rectangle;
DrawingVisual visual = new DrawingVisual();
DrawingContext context = visual.RenderOpen();
context.PushTransform(this.rotateTransform);
context.DrawRectangle(null, new Pen(Brushes.Blue, 2), transformed);
context.Pop();
context.Close();
canvas.Children.Add(visual);
有没有办法像第一个代码片段中那样使用 Rect.Transform(Matrix) 函数来转换 Rect？
I am trying to apply RotateTransform to a Rect object with the following code.
Rect transformed = this.Rectangle;
transformed.Transform(this.rotateTransform.Value);
DrawingVisual visual = new DrawingVisual();
DrawingContext context = visual.RenderOpen();
context.DrawRectangle(null, new Pen(Brushes.Blue, 2), transformed);
context.Close();
canvas.Children.Add(visual);
but the rectangle is not rotated. However when I push the transformation to the DrawingContext, as in the following code, rectangle is transformed correctly.
Rect transformed = this.Rectangle;
DrawingVisual visual = new DrawingVisual();
DrawingContext context = visual.RenderOpen();
context.PushTransform(this.rotateTransform);
context.DrawRectangle(null, new Pen(Brushes.Blue, 2), transformed);
context.Pop();
context.Close();
canvas.Children.Add(visual);
Is there a way to transform a Rect as in the first code fragment with Rect.Transform(Matrix) function?
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可能是因为你的旋转不是 90 度的倍数。矩形上的变换会产生与 x 平行的矩形y 轴！
Prabably because your rotation is not multiple of 90deg. Transform on Rect results in rect that it parallel to x & y axis!