Phaser API Documentation

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A LineCurve is a "curve" comprising exactly two points (a line segment).

Constructor:

new Line(p0, [p1])

Parameters:

name type arguments description
p0 Array.<number> | Phaser.Math.Vector2

The first endpoint.

p1 Phaser.Math.Vector2 <optional>

The second endpoint.

Since: 3.0.0
Source: src/curves/LineCurve.js (Line 15)

Extends


Members

<private> _tmpVec2A: Phaser.Math.Vector2
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Description:

A temporary calculation Vector.

Type:
Inherited from: Phaser.Curves.Curve#_tmpVec2A
Since: 3.0.0
Source: src/curves/Curve.js (Line 90)
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<private> _tmpVec2B: Phaser.Math.Vector2
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Description:

A temporary calculation Vector.

Type:
Inherited from: Phaser.Curves.Curve#_tmpVec2B
Since: 3.0.0
Source: src/curves/Curve.js (Line 100)
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active: boolean
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Description:

For a curve on a Path, false means the Path will ignore this curve.

Type:
boolean
Default: true
Inherited from: Phaser.Curves.Curve#active
Since: 3.0.0
Source: src/curves/Curve.js (Line 80)
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arcLengthDivisions: number
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Description:

The quantity of arc length divisions within the curve.

Type:
number
Default: 1
Overrides: Phaser.Curves.Curve#arcLengthDivisions
Since: 3.0.0
Source: src/curves/LineCurve.js (Line 65)
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cacheArcLengths: Array.<number>
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Description:

An array of cached arc length values.

Type:
Array.<number>
Default: []
Inherited from: Phaser.Curves.Curve#cacheArcLengths
Since: 3.0.0
Source: src/curves/Curve.js (Line 60)
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defaultDivisions: number
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Description:

The default number of divisions within the curve.

Type:
number
Default: 5
Inherited from: Phaser.Curves.Curve#defaultDivisions
Since: 3.0.0
Source: src/curves/Curve.js (Line 40)
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needsUpdate: boolean
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Description:

Does the data of this curve need updating?

Type:
boolean
Default: true
Inherited from: Phaser.Curves.Curve#needsUpdate
Since: 3.0.0
Source: src/curves/Curve.js (Line 70)
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Description:

The first endpoint.

Type:
Since: 3.0.0
Source: src/curves/LineCurve.js (Line 45)
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Description:

The second endpoint.

Type:
Since: 3.0.0
Source: src/curves/LineCurve.js (Line 54)
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type: string
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Description:

String based identifier for the type of curve.

Type:
string
Inherited from: Phaser.Curves.Curve#type
Since: 3.0.0
Source: src/curves/Curve.js (Line 31)
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Methods

draw(graphics)
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Description:

Draws this curve on the given Graphics object.

The curve is drawn using Graphics.lineBetween so will be drawn at whatever the present Graphics line color is. The Graphics object is not cleared before the draw, so the curve will appear on-top of anything else already rendered to it.

Parameters:

name type description
graphics Phaser.GameObjects.Graphics

The Graphics instance onto which this curve will be drawn.

Returns:
Description:

The Graphics object to which the curve was drawn.

Overrides: Phaser.Curves.Curve#draw
Since: 3.0.0
Source: src/curves/LineCurve.js (Line 236)
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getBounds([out])
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Description:

Returns a Rectangle where the position and dimensions match the bounds of this Curve.

Parameters:

name type arguments description
out Phaser.Geom.Rectangle <optional>

A Rectangle object to store the bounds in. If not given a new Rectangle will be created.

Returns:
Description:

A Rectangle object holding the bounds of this curve. If out was given it will be this object.

Overrides: Phaser.Curves.Curve#getBounds
Since: 3.0.0
Source: src/curves/LineCurve.js (Line 76)
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getDistancePoints(distance)
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Description:

Returns an array of points, spaced out X distance pixels apart. The smaller the distance, the larger the array will be.

Parameters:

name type description
distance number

The distance, in pixels, between each point along the curve.

Returns:
Description:

An Array of Point objects.

Type:
Inherited from: Phaser.Curves.Curve#getDistancePoints
Since: 3.0.0
Source: src/curves/Curve.js (Line 169)
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getEndPoint([out])
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Description:

Get a point at the end of the curve.

Parameters:

name type arguments description
out Phaser.Math.Vector2 <optional>

Optional Vector object to store the result in.

Returns:
Description:

Vector2 containing the coordinates of the curves end point.

Inherited from: Phaser.Curves.Curve#getEndPoint
Since: 3.0.0
Source: src/curves/Curve.js (Line 189)
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getLength()
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Description:

Get total curve arc length

Returns:
Description:

The total length of the curve.

Type:
  • number
Inherited from: Phaser.Curves.Curve#getLength
Since: 3.0.0
Source: src/curves/Curve.js (Line 206)
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getLengths([divisions])
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Description:

Get a list of cumulative segment lengths.

These lengths are

  • [0] 0
  • [1] The first segment
  • [2] The first and second segment
  • ...
  • [divisions] All segments

Parameters:

name type arguments description
divisions number <optional>

The number of divisions or segments.

Returns:
Description:

An array of cumulative lengths.

Type:
  • Array.<number>
Inherited from: Phaser.Curves.Curve#getLengths
Since: 3.0.0
Source: src/curves/Curve.js (Line 222)
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getPoint(t, [out])
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Description:

Get point at relative position in curve according to length.

Parameters:

name type arguments description
t number

The position along the curve to return. Where 0 is the start and 1 is the end.

out Phaser.Math.Vector2 <optional>

A Vector2 object to store the result in. If not given will be created.

Returns:
Description:

The coordinates of the point on the curve. If an out object was given this will be returned.

Since: 3.0.0
Source: src/curves/LineCurve.js (Line 131)
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getPointAt(u, [out])
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Description:

Gets a point at a given position on the line.

Parameters:

name type arguments description
u number

The position along the curve to return. Where 0 is the start and 1 is the end.

out Phaser.Math.Vector2 <optional>

A Vector2 object to store the result in. If not given will be created.

Returns:
Description:

The coordinates of the point on the curve. If an out object was given this will be returned.

Overrides: Phaser.Curves.Curve#getPointAt
Since: 3.0.0
Source: src/curves/LineCurve.js (Line 160)
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getPoints([divisions], [stepRate], [out])
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Description:

Get a sequence of evenly spaced points from the curve.

You can pass divisions, stepRate, or neither.

The number of divisions will be

  1. divisions, if divisions > 0; or
  2. this.getLength / stepRate, if stepRate > 0; or
  3. this.defaultDivisions

1 + divisions points will be returned.

Parameters:

name type arguments description
divisions number <optional>

The number of divisions to make.

stepRate number <optional>

The curve distance between points, implying divisions.

out array | Array.<Phaser.Math.Vector2> <optional>

An optional array to store the points in.

Returns:
Description:

An array of Points from the curve.

Type:
Inherited from: Phaser.Curves.Curve#getPoints
Since: 3.0.0
Source: src/curves/Curve.js (Line 300)
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getRandomPoint([out])
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Description:

Get a random point from the curve.

Parameters:

name type arguments description
out Phaser.Math.Vector2 <optional>

A point object to store the result in.

Returns:
Description:

The point.

Inherited from: Phaser.Curves.Curve#getRandomPoint
Since: 3.0.0
Source: src/curves/Curve.js (Line 349)
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getResolution([divisions])
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Description:

Gets the resolution of the line.

Parameters:

name type arguments Default description
divisions number <optional> 1

The number of divisions to consider.

Returns:
Description:

The resolution. Equal to the number of divisions.

Type:
  • number
Since: 3.0.0
Source: src/curves/LineCurve.js (Line 114)
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getSpacedPoints([divisions], [stepRate], [out])
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Description:

Get a sequence of equally spaced points (by arc distance) from the curve.

1 + divisions points will be returned.

Parameters:

name type arguments Default description
divisions number <optional> this.defaultDivisions

The number of divisions to make.

stepRate number <optional>

Step between points. Used to calculate the number of points to return when divisions is falsy. Ignored if divisions is positive.

out array | Array.<Phaser.Math.Vector2> <optional>

An optional array to store the points in.

Returns:
Description:

An array of points.

Type:
Inherited from: Phaser.Curves.Curve#getSpacedPoints
Since: 3.0.0
Source: src/curves/Curve.js (Line 370)
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getStartPoint([out])
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Description:

Gets the starting point on the curve.

Parameters:

name type arguments description
out Phaser.Math.Vector2 <optional>

A Vector2 object to store the result in. If not given will be created.

Returns:
Description:

The coordinates of the point on the curve. If an out object was given this will be returned.

Overrides: Phaser.Curves.Curve#getStartPoint
Since: 3.0.0
Source: src/curves/LineCurve.js (Line 95)
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getTFromDistance(distance, [divisions])
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Description:

Given a distance in pixels, get a t to find p.

Parameters:

name type arguments description
distance number

The distance, in pixels.

divisions number <optional>

Optional amount of divisions.

Returns:
Description:

The distance.

Type:
  • number
Inherited from: Phaser.Curves.Curve#getTFromDistance
Since: 3.0.0
Source: src/curves/Curve.js (Line 492)
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getTangent([t], [out])
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Description:

Gets the slope of the line as a unit vector.

Parameters:

name type arguments description
t number <optional>

The relative position on the line, [0..1].

out Phaser.Math.Vector2 <optional>

A vector to store the result in.

Returns:
Description:

The tangent vector.

Overrides: Phaser.Curves.Curve#getTangent
Since: 3.0.0
Source: src/curves/LineCurve.js (Line 178)
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getTangentAt(u, [out])
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Description:

Get a unit vector tangent at a relative position on the curve, by arc length.

Parameters:

name type arguments description
u number

The relative position on the curve, [0..1].

out Phaser.Math.Vector2 <optional>

A vector to store the result in.

Returns:
Description:

The tangent vector.

Inherited from: Phaser.Curves.Curve#getTangentAt
Since: 3.0.0
Source: src/curves/Curve.js (Line 472)
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getUtoTmapping(u, distance, [divisions])
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Description:

Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equidistant.

Parameters:

name type arguments description
u number

A float between 0 and 1.

distance number

The distance, in pixels.

divisions number <optional>

Optional amount of divisions.

Returns:
Description:

The equidistant value.

Type:
  • number
Overrides: Phaser.Curves.Curve#getUtoTmapping
Since: 3.0.0
Source: src/curves/LineCurve.js (Line 200)
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toJSON()
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Description:

Gets a JSON representation of the line.

Returns:
Description:

The JSON object containing this curve data.

Since: 3.0.0
Source: src/curves/LineCurve.js (Line 259)
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updateArcLengths()
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Description:

Calculate and cache the arc lengths.

Inherited from: Phaser.Curves.Curve#updateArcLengths
Since: 3.0.0
Source: src/curves/Curve.js (Line 594)
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<static> fromJSON(data)
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Description:

Configures this line from a JSON representation.

Parameters:

name type description
data Phaser.Types.Curves.JSONCurve

The JSON object containing this curve data.

Returns:
Description:

A new LineCurve object.

Since: 3.0.0
Source: src/curves/LineCurve.js (Line 280)
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