Class IntersectionHelper

Inheritance

System.Object

IntersectionHelper

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: UnityEngine.Experimental.U2D.TriangleNet.Tools

Syntax

public static class IntersectionHelper

Methods

BoxRayIntersection(Rectangle, Point, Double, Double)

Intersect a ray with a bounding box.

Declaration

public static Point BoxRayIntersection(Rectangle rect, Point p, double dx, double dy)

Parameters

Type	Name	Description
Rectangle	rect	The clip rectangle.
Point	p	The ray startpoint (inside the box).
System.Double	dx	X direction.
System.Double	dy	Y direction.

Returns

Type	Description
Point	Returns false, if startpoint is outside the box.

BoxRayIntersection(Rectangle, Point, Double, Double, ref Point)

Intersect a ray with a bounding box.

Declaration

public static bool BoxRayIntersection(Rectangle rect, Point p, double dx, double dy, ref Point c)

Parameters

Type	Name	Description
Rectangle	rect	The clip rectangle.
Point	p	The ray startpoint (inside the box).
System.Double	dx	X direction.
System.Double	dy	Y direction.
Point	c	The intersection point.

Returns

Type	Description
System.Boolean	Returns false, if startpoint is outside the box.

BoxRayIntersection(Rectangle, Point, Point, ref Point)

Intersect a ray with a bounding box.

Declaration

public static bool BoxRayIntersection(Rectangle rect, Point p0, Point p1, ref Point c1)

Parameters

Type	Name	Description
Rectangle	rect	The clip rectangle.
Point	p0	The ray startpoint (inside the box).
Point	p1	Any point in ray direction (NOT the direction vector).
Point	c1	The intersection point.

Returns

Type	Description
System.Boolean	Returns false, if startpoint is outside the box.

IntersectSegments(Point, Point, Point, Point, ref Point)

Compute intersection of two segments.

Declaration

public static void IntersectSegments(Point p0, Point p1, Point q0, Point q1, ref Point c0)

Parameters

Type	Name	Description
Point	p0	Segment 1 start point.
Point	p1	Segment 1 end point.
Point	q0	Segment 2 start point.
Point	q1	Segment 2 end point.
Point	c0	The intersection point.

Remarks

This is a special case of segment intersection. Since the calling algorithm assures that a valid intersection exists, there's no need to check for any special cases.

LiangBarsky(Rectangle, Point, Point, ref Point, ref Point)

Intersect segment with a bounding box.

Declaration

public static bool LiangBarsky(Rectangle rect, Point p0, Point p1, ref Point c0, ref Point c1)

Parameters

Type	Name	Description
Rectangle	rect	The clip rectangle.
Point	p0	Segment endpoint.
Point	p1	Segment endpoint.
Point	c0	The new location of p0.
Point	c1	The new location of p1.

Returns

Type	Description
System.Boolean	Returns true, if segment is clipped.

Remarks

Based on Liang-Barsky function by Daniel White: http://www.skytopia.com/project/articles/compsci/clipping.html