FillRule Property
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GeometryGroup.FillRule Property

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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)
XMLNS for XAML: Not mapped to an xmlns.

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.

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.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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