Class ClippingFunctions

Inheritance
object
ClippingFunctions
Inherited Members
Namespace: Mapsui.Rendering.Skia.Functions
Assembly: Mapsui.Rendering.Skia.dll
Syntax
public static class ClippingFunctions

Methods

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LiangBarskyClip(SKPoint, SKPoint, SKRect, out SKPoint, out SKPoint)

A Liang-Barsky implementation to detect the intersection between a line and a rect. With this, all lines, that aren't visible on screen could be sorted out. Found at https://gist.github.com/ChickenProp/3194723

Declaration
public static ClippingFunctions.Intersection LiangBarskyClip(SKPoint point1, SKPoint point2, SKRect clipRect, out SKPoint intersectionPoint1, out SKPoint intersectionPoint2)
Parameters
Type Name Description
SKPoint point1

First point of line
SKPoint point2

Second point of line
SKRect clipRect
SKPoint intersectionPoint1

First intersection point
SKPoint intersectionPoint2

Second intersection point
Returns
Type Description
ClippingFunctions.Intersection
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ReducePointsToClipRect(IEnumerable<Coordinate>?, Viewport, SKRect)

Reduce list of points, so that all are inside of cliptRect See https://en.wikipedia.org/wiki/Sutherland%E2%80%93Hodgman_algorithm

Declaration
public static List<SKPoint> ReducePointsToClipRect(IEnumerable<Coordinate>? points, Viewport viewport, SKRect clipRect)
Parameters
Type Name Description
IEnumerable<Coordinate> points

List of points to reduce.
Viewport viewport

The Viewport that is used for the conversions.
SKRect clipRect

Rectangle to clip to. All points outside aren't drawn.
Returns
Type Description
List<SKPoint>