Class SplineMath

Assorted utility functions for math equations commonly used when working with Splines.

Inheritance

object

SplineMath

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: UnityEngine.Splines

Assembly: Unity.Splines.dll

Syntax

public static class SplineMath

Methods

DistancePointLine(float3, float3, float3)

Gets the distance from a point to a line segment.

Declaration

public static float DistancePointLine(float3 p, float3 a, float3 b)

Parameters

Type	Name	Description
float3	p	The point to compare against.
float3	a	The start point of the line segment.
float3	b	The end point of the line segment.

Returns

Type	Description
float	Returns the distance of the closest line from a point to a line segment.

PointLineNearestPoint(float3, float3, float3, out float)

Returns the nearest point on a finite line segment to a point.

Declaration

public static float3 PointLineNearestPoint(float3 p, float3 a, float3 b, out float lineParam)

Parameters

Type	Name	Description
float3	p	The point to compare to.
float3	a	The line start point.
float3	b	The line end point.
float	lineParam	The signed distance between point 'a' and the projection of point 'p' on the line segment.

Returns

Type	Description
float3	The nearest point on a line segment to another point.

RayLineDistance(float3, float3, float3, float3)

Returns the shortest distance between a ray and line segment as a direction and magnitude.

Declaration

public static float3 RayLineDistance(float3 ro, float3 rd, float3 a, float3 b)

Parameters

Type	Name	Description
float3	ro	The ray origin point.
float3	rd	The ray direction (normalized vector).
float3	a	The line start point.
float3	b	The line end point.

Returns

Type	Description
float3	Returns the shortest distance between a ray and line segment as a direction and magnitude.

RayLineNearestPoint(float3, float3, float3, float3)

Returns the nearest points between a ray and line segment.

Declaration

public static (float3 rayPoint, float3 linePoint) RayLineNearestPoint(float3 ro, float3 rd, float3 a, float3 b)

Parameters

Type	Name	Description
float3	ro	The ray origin point.
float3	rd	The ray direction (normalized vector).
float3	a	The line start point.
float3	b	The line end point.

Returns

Type	Description
(float3 rayPoint, float3 linePoint)	Returns the nearest points between a ray and line segment.

RayLineNearestPoint(float3, float3, float3, float3, out float, out float)

Returns the nearest points on a ray and a line segment to one another.

Declaration

public static (float3 rayPoint, float3 linePoint) RayLineNearestPoint(float3 ro, float3 rd, float3 a, float3 b, out float rayParam, out float lineParam)

Parameters

Type	Name	Description
float3	ro	The ray origin point.
float3	rd	The ray direction (normalized vector).
float3	a	The line start point.
float3	b	The line end point.
float	rayParam	The signed distance between point 'ro' and the projection of the line segment along the ray.
float	lineParam	The signed distance between point 'a' and the projection of point 'p' on the line segment.

Returns

Type	Description
(float3 rayPoint, float3 linePoint)	Returns the nearest points on a ray and a line segment to one another.

RayLineParameter(float3, float3, float3, float3)

Returns the parameterization of a ray line projection. The parameter will be negative if the nearest point between the ray/line is negative to 'lineOrigin', and greater than 1 if nearest intersection is past the end off the line segment (lineOrigin + lineDir).

Declaration

public static float RayLineParameter(float3 ro, float3 rd, float3 lineOrigin, float3 lineDir)

Parameters

Type	Name	Description
float3	ro	The ray origin point.
float3	rd	The ray direction (normalized vector).
float3	lineOrigin	Line segment first point.
float3	lineDir	Line segment direction (with magnitude).

Returns

Type	Description
float	The parameter of a ray line projection.