Struct BezierCurve

Control points for a cubic bezier curve.

Points P0 through P3 are in sequential order, describing the starting point, second, third, and ending controls for a cubic bezier curve.

Namespace: UnityEngine.Splines

Syntax

public struct BezierCurve : IEquatable<BezierCurve>

Constructors

BezierCurve(float3, float3)

Construct a cubic bezier curve from a linear curve. A linear curve is simply a straight line.

Declaration

public BezierCurve(float3 p0, float3 p1)

Parameters

Type	Name	Description
float3	p0	The first control point. This is the start point of the curve.
float3	p1	The second control point. This is the end point of the curve.

BezierCurve(float3, float3, float3)

Construct a cubic bezier curve by elevating a quadratic curve.

Declaration

public BezierCurve(float3 p0, float3 p1, float3 p2)

Parameters

Type	Name	Description
float3	p0	The first control point. This is the start point of the curve.
float3	p1	The second control point.
float3	p2	The third control point. This is the end point of the curve.

BezierCurve(float3, float3, float3, float3)

Construct a cubic bezier curve from a series of control points.

Declaration

public BezierCurve(float3 p0, float3 p1, float3 p2, float3 p3)

Parameters

Type	Name	Description
float3	p0	The first control point. This is the start point of the curve.
float3	p1	The second control point.
float3	p2	The third control point.
float3	p3	The fourth control point. This is the end point of the curve.

BezierCurve(BezierKnot, BezierKnot)

Construct a cubic bezier curve from a start and end BezierKnot.

Declaration

public BezierCurve(BezierKnot a, BezierKnot b)

Parameters

Type	Name	Description
BezierKnot	a	The knot to use as the first and second control points. The first control point is equal to Position, and the second control point is equal to (Position + TangentOut that's rotated by Rotation).
BezierKnot	b	The knot to use as the third and fourth control points. The third control point is equal to (Position + TangentIn that's rotated by Rotation), and the fourth control point is equal to Position.

Fields

P0

First control point.

Declaration

public float3 P0

Field Value

Type	Description
float3

P1

Second control point. Subtract P0 from P1 to derive the first tangent for a curve.

Declaration

public float3 P1

Field Value

Type	Description
float3

P2

Third control point. Subtract P3 from P2 to derive the second tangent for a curve.

Declaration

public float3 P2

Field Value

Type	Description
float3

P3

Fourth control point.

Declaration

public float3 P3

Field Value

Type	Description
float3

Properties

Tangent0

The direction and magnitude of the first tangent in a cubic curve.

Declaration

public float3 Tangent0 { get; set; }

Property Value

Type	Description
float3

Tangent1

The direction and magnitude of the second tangent in a cubic curve.

Declaration

public float3 Tangent1 { get; set; }

Property Value

Type	Description
float3

Methods

Equals(Object)

Compare against an object for equality.

Declaration

public override bool Equals(object obj)

Parameters

Type	Name	Description
Object	obj	The object to compare against.

Returns

Type	Description
Boolean	Returns true when obj is a BezierCurve and the control points of each curve are identical.

Equals(BezierCurve)

Compare two curves for equality.

Declaration

public bool Equals(BezierCurve other)

Parameters

Type	Name	Description
BezierCurve	other	The curve to compare against.

Returns

Type	Description
Boolean	Returns true when the control points of each curve are identical.

FromTangent(float3, float3, float3, float3)

Create a BezierCurve from a start and end point plus tangent directions.

Declaration

public static BezierCurve FromTangent(float3 pointA, float3 tangentOutA, float3 pointB, float3 tangentInB)

Parameters

Type	Name	Description
float3	pointA	Starting position of the curve.
float3	tangentOutA	The direction and magnitude to the second control point.
float3	pointB	Ending position of the curve.
float3	tangentInB	The direction and magnitude to the third control point.

Returns

Type	Description
BezierCurve	A new BezierCurve from the derived control points.

GetHashCode()

Calculate a hash code for this curve.

Declaration

public override int GetHashCode()

Returns

Type	Description
Int32	A hash code for the curve.

Operators

Equality(BezierCurve, BezierCurve)

Compare two curves for equality.

Declaration

public static bool operator ==(BezierCurve left, BezierCurve right)

Parameters

Type	Name	Description
BezierCurve	left	The first curve.
BezierCurve	right	The second curve.

Returns

Type	Description
Boolean	Returns true when the control points of each curve are identical.

Inequality(BezierCurve, BezierCurve)

Compare two curves for inequality.

Declaration

public static bool operator !=(BezierCurve left, BezierCurve right)

Parameters

Type	Name	Description
BezierCurve	left	The first curve.
BezierCurve	right	The second curve.

Returns

Type	Description
Boolean	Returns false when the control points of each curve are identical.