C# 绘图：绘制中间有孔的多边形的最佳方法是什么

发布于 2024-11-15 03:51:56 字数 323 浏览 4 评论 0原文

我有一个由外边框和内边框定义的形状。如果没有内边框，则形状是实心的。如果有内部边界，我希望仅在两个边界之间定义多边形/路径；我不想绘制外部，然后用背景颜色绘制内部。

例如，如果我有一个由以下坐标定义的外部边框的正方形：

{0,0}, {20, 0}, {20,20}, {0, 20}

那么该正方形的大小为 20x20，其左下角位于原点。然后，该形状从中心切出一个三角形：

{10,10}, {15,10}, {15,15}

如何使用 WPF 或 GDI+ 创建包含该形状的路径？

原文

I have a shape that is defined by an outer border and then an inner border. IF there is no inner boarder, the shape is solid. If there is an inner border I want the polygon/path to be defined only between the two borders; I don't want to draw the outside and then draw the inside in the background color.

For example, if I have a square defined by the following coordinates for the outside border:

{0,0}, {20, 0}, {20,20}, {0, 20}

Then that square which is 20x20 with its bottom left right corner on the origin. That shape then has a triangle cut out of the center:

{10,10}, {15,10}, {15,15}

How can I create a path that contains this shape using either WPF or GDI+?

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

樱＆纷飞 2024-11-22 03:51:56

您可以使用 XAML 绘制该形状：（关键是使用 CombinedGeometry 和 GeometryCombineMode="Exclude"）

<Path Fill="Black">
    <Path.Data>
        <CombinedGeometry GeometryCombineMode="Exclude">
            <CombinedGeometry.Geometry1>
                <RectangleGeometry Rect="0,0,20,20"/>
            </CombinedGeometry.Geometry1>
            <CombinedGeometry.Geometry2>
                <PathGeometry>
                    <PathFigure StartPoint="10,10">
                        <LineSegment Point="15,10"/>
                        <LineSegment Point="15,15"/>
                    </PathFigure>
                </PathGeometry>
            </CombinedGeometry.Geometry2>
        </CombinedGeometry>
    </Path.Data>
</Path>

You can draw that shape with XAML: (The key is to use a CombinedGeometry with GeometryCombineMode="Exclude")

<Path Fill="Black">
    <Path.Data>
        <CombinedGeometry GeometryCombineMode="Exclude">
            <CombinedGeometry.Geometry1>
                <RectangleGeometry Rect="0,0,20,20"/>
            </CombinedGeometry.Geometry1>
            <CombinedGeometry.Geometry2>
                <PathGeometry>
                    <PathFigure StartPoint="10,10">
                        <LineSegment Point="15,10"/>
                        <LineSegment Point="15,15"/>
                    </PathFigure>
                </PathGeometry>
            </CombinedGeometry.Geometry2>
        </CombinedGeometry>
    </Path.Data>
</Path>

回复收藏 0 原文