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GeometryGroup.FillRule Property

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Gets or sets how the intersecting areas of the objects contained in this GeometryGroup are combined.

Namespace:  System.Windows.Media
Assembly:  System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public Property FillRule As FillRule

public FillRule FillRule { get; set; }

<GeometryGroup FillRule="EvenOdd"/>
-or-
<GeometryGroup FillRule="NonZero"/>

Property Value

Type: System.Windows.Media.FillRule
One of the enumeration values that specifies how the intersecting areas are combined to form the resulting area. The default is EvenOdd.

Remarks

Dependency property identifier field: FillRuleProperty

FillRule.EvenOdd determines the "insideness" of a point on the shape by drawing a ray from that point to infinity in any direction and counting the number of path segments from the given shape that the ray crosses. If this number is odd, the point is inside; if even, the point is outside.

FillRule.Nonzero determines the "insideness" of a point on the shape by drawing a ray from that point to infinity in any direction and then examining the places where a segment of the shape crosses the ray. Starting with a count of zero, add one each time a segment crosses the ray from left to right and subtract one each time a path segment crosses the ray from right to left. After counting the crossings, if the result is zero then the point is outside the path. Otherwise, it is inside.

Fill rule illustration

FillRule values.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.