当两个形状对象相互重叠以至于对象的重叠部分被绘制在不同的画笔中时,WPF中是否存在一种方法?
答案 0 :(得分:3)
完成了工作。
您可以使用包含GeometryGroup的几何图形,其填充规则为EvenOdd。这会以白色绘制任何重叠项目。然后使用CombinedGeometry将另一个图像放在顶部,其中包含与Geometry组相同的对象,并使用相交的GeometryCombineMode,这将突出显示自定义画笔中的相交。示例代码如下:
<Grid>
<Image Stretch="None">
<Image.Source>
<DrawingImage>
<DrawingImage.Drawing>
<GeometryDrawing Brush="Red">
<GeometryDrawing.Pen>
<Pen Brush="Black" Thickness="3" />
</GeometryDrawing.Pen>
<GeometryDrawing.Geometry>
<GeometryGroup FillRule="EvenOdd">
<EllipseGeometry RadiusX="80" RadiusY="80" Center="0,0" />
<EllipseGeometry RadiusX="80" RadiusY="80" Center="40,0" />
</GeometryGroup>
</GeometryDrawing.Geometry>
</GeometryDrawing>
</DrawingImage.Drawing>
</DrawingImage>
</Image.Source>
</Image>
<Image HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Stretch="None">
<Image.Source>
<DrawingImage>
<DrawingImage.Drawing>
<GeometryDrawing Brush="LightBlue">
<GeometryDrawing.Geometry>
<CombinedGeometry GeometryCombineMode="Intersect">
<CombinedGeometry.Geometry1>
<EllipseGeometry RadiusX="80" RadiusY="80" Center="0,0" />
</CombinedGeometry.Geometry1>
<CombinedGeometry.Geometry2>
<EllipseGeometry RadiusX="80" RadiusY="80" Center="40,0" />
</CombinedGeometry.Geometry2>
</CombinedGeometry>
</GeometryDrawing.Geometry>
</GeometryDrawing>
</DrawingImage.Drawing>
</DrawingImage>
</Image.Source>
</Image>
</Grid>
谢谢!