Find corners of quadrilateral or triangular area, which contains the specified collection of points.

**Namespace:**
AForge.Math.Geometry

**Assembly:**
AForge.Math (in AForge.Math.dll) Version: 2.2.5.0 (2.2.5.0)

# Syntax

C# |
---|

public static List<IntPoint> FindQuadrilateralCorners( IEnumerable<IntPoint> cloud ) |

#### Parameters

- cloud
- Type: System.Collections.Generic..::.IEnumerable<(Of <(IntPoint>)>)

Collection of points to search quadrilateral for.

#### Return Value

Returns a list of 3 or 4 points, which are corners of the quadrilateral or triangular area filled by specified collection of point. The first point in the list is the point with lowest X coordinate (and with lowest Y if there are several points with the same X value). The corners are provided in counter clockwise order (Cartesian coordinate system).# Remarks

The method makes an assumption that the specified collection of points form some sort of quadrilateral/triangular area. With this assumption it tries to find corners of the area.

**Note:**The method does not search for

**bounding**quadrilateral/triangular area, where all specified points are

**inside**of the found quadrilateral/triangle. Some of the specified points potentially may be outside of the found quadrilateral/triangle, since the method takes corners only from the specified collection of points, but does not calculate such to form true bounding quadrilateral/triangle.

See QuadrilateralRelativeDistortionLimit property for additional information.