These archived docs are for Phaser 2.2.2 Phaser 3 docs can be found on newdocs.phaser.io.
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Constructor

Phaser. Circle

new Circle(x, y, diameter)

Creates a new Circle object with the center coordinate specified by the x and y parameters and the diameter specified by the diameter parameter. If you call this function without parameters, a circle with x, y, diameter and radius properties set to 0 is created.

Parameters
Name Type Argument Default Description
x number <optional>
0

The x coordinate of the center of the circle.

y number <optional>
0

The y coordinate of the center of the circle.

diameter number <optional>
0

The diameter of the circle.

Source code: geom/Circle.js, line 17

Public Properties

[readonly] area : number

The area of this Circle.

Source code: geom/Circle.js, line 378

bottom : number

The sum of the y and radius properties. Changing the bottom property of a Circle object has no effect on the x and y properties, but does change the diameter. Gets or sets the bottom of the circle.

Source code: geom/Circle.js, line 351

diameter : number

The largest distance between any two points on the circle. The same as the radius * 2. Gets or sets the diameter of the circle.

Source code: geom/Circle.js, line 225

empty : boolean

Determines whether or not this Circle object is empty. Will return a value of true if the Circle objects diameter is less than or equal to 0; otherwise false. If set to true it will reset all of the Circle objects properties to 0. A Circle object is empty if its diameter is less than or equal to 0. Gets or sets the empty state of the circle.

Source code: geom/Circle.js, line 401

left

The x coordinate of the leftmost point of the circle. Changing the left property of a Circle object has no effect on the x and y properties. However it does affect the diameter, whereas changing the x value does not affect the diameter property.

Source code: geom/Circle.js, line 270

radius : number

The length of a line extending from the center of the circle to any point on the circle itself. The same as half the diameter. Gets or sets the radius of the circle.

Source code: geom/Circle.js, line 247

The x coordinate of the rightmost point of the circle. Changing the right property of a Circle object has no effect on the x and y properties. However it does affect the diameter, whereas changing the x value does not affect the diameter property. Gets or sets the value of the rightmost point of the circle.

Source code: geom/Circle.js, line 297

top : number

The sum of the y minus the radius property. Changing the top property of a Circle object has no effect on the x and y properties, but does change the diameter. Gets or sets the top of the circle.

Source code: geom/Circle.js, line 324

x : number

The x coordinate of the center of the circle.

Source code: geom/Circle.js, line 26

y : number

The y coordinate of the center of the circle.

Source code: geom/Circle.js, line 31

Public Methods

<static> circumferencePoint(a, angle, asDegrees, out) → {Phaser.Point}

Returns a Point object containing the coordinates of a point on the circumference of the Circle based on the given angle.

Parameters
Name Type Argument Default Description
a Phaser.Circle

The first Circle object.

angle number

The angle in radians (unless asDegrees is true) to return the point from.

asDegrees boolean <optional>
false

Is the given angle in radians (false) or degrees (true)?

out Phaser.Point <optional>

An optional Point object to put the result in to. If none specified a new Point object will be created.

Returns

The Point object holding the result.

Source code: geom/Circle.js, line 472

<static> contains(a, x, y) → {boolean}

Return true if the given x/y coordinates are within the Circle object.

Parameters
Name Type Description
a Phaser.Circle

The Circle to be checked.

x number

The X value of the coordinate to test.

y number

The Y value of the coordinate to test.

Returns
boolean -

True if the coordinates are within this circle, otherwise false.

Source code: geom/Circle.js, line 424

<static> equals(a, b) → {boolean}

Determines whether the two Circle objects match. This method compares the x, y and diameter properties.

Parameters
Name Type Description
a Phaser.Circle

The first Circle object.

b Phaser.Circle

The second Circle object.

Returns
boolean -

A value of true if the object has exactly the same values for the x, y and diameter properties as this Circle object; otherwise false.

Source code: geom/Circle.js, line 449

<static> intersects(a, b) → {boolean}

Determines whether the two Circle objects intersect. This method checks the radius distances between the two Circle objects to see if they intersect.

Parameters
Name Type Description
a Phaser.Circle

The first Circle object.

b Phaser.Circle

The second Circle object.

Returns
boolean -

A value of true if the specified object intersects with this Circle object; otherwise false.

Source code: geom/Circle.js, line 460

<static> intersectsRectangle(c, r) → {boolean}

Checks if the given Circle and Rectangle objects intersect.

Parameters
Name Type Description
c Phaser.Circle

The Circle object to test.

r Phaser.Rectangle

The Rectangle object to test.

Returns
boolean -

True if the two objects intersect, otherwise false.

Source code: geom/Circle.js, line 498

circumference() → {number}

The circumference of the circle.

Returns
number -
Source code: geom/Circle.js, line 58

circumferencePoint(angle, asDegrees, out) → {Phaser.Point}

Returns a Point object containing the coordinates of a point on the circumference of the Circle based on the given angle.

Parameters
Name Type Argument Default Description
angle number

The angle in radians (unless asDegrees is true) to return the point from.

asDegrees boolean <optional>
false

Is the given angle in radians (false) or degrees (true)?

out Phaser.Point <optional>

An optional Point object to put the result in to. If none specified a new Point object will be created.

Returns

The Point object holding the result.

Source code: geom/Circle.js, line 172

clone(output) → {Phaser.Circle}

Returns a new Circle object with the same values for the x, y, width, and height properties as this Circle object.

Parameters
Name Type Description
output Phaser.Circle

Optional Circle object. If given the values will be set into the object, otherwise a brand new Circle object will be created and returned.

Returns

The cloned Circle object.

Source code: geom/Circle.js, line 138

contains(x, y) → {boolean}

Return true if the given x/y coordinates are within this Circle object.

Parameters
Name Type Description
x number

The X value of the coordinate to test.

y number

The Y value of the coordinate to test.

Returns
boolean -

True if the coordinates are within this circle, otherwise false.

Source code: geom/Circle.js, line 159

copyFrom(source) → {Circle}

Copies the x, y and diameter properties from any given object to this Circle.

Parameters
Name Type Description
source any

The object to copy from.

Returns
Circle -

This Circle object.

Source code: geom/Circle.js, line 95

copyTo(dest) → {object}

Copies the x, y and diameter properties from this Circle to any given object.

Parameters
Name Type Description
dest any

The object to copy to.

Returns
object -

This dest object.

Source code: geom/Circle.js, line 107

distance(dest, round) → {number}

Returns the distance from the center of the Circle object to the given object (can be Circle, Point or anything with x/y properties)

Parameters
Name Type Argument Default Description
dest object

The target object. Must have visible x and y properties that represent the center of the object.

round boolean <optional>
false

Round the distance to the nearest integer.

Returns
number -

The distance between this Point object and the destination Point object.

Source code: geom/Circle.js, line 123

getBounds() → {Phaser.Rectangle}

Returns the framing rectangle of the circle as a Phaser.Rectangle object

Returns

The bounds of the Circle.

Source code: geom/Circle.js, line 67

offset(dx, dy) → {Circle}

Adjusts the location of the Circle object, as determined by its center coordinate, by the specified amounts.

Parameters
Name Type Description
dx number

Moves the x value of the Circle object by this amount.

dy number

Moves the y value of the Circle object by this amount.

Returns
Circle -

This Circle object.

Source code: geom/Circle.js, line 186

offsetPoint(point) → {Circle}

Adjusts the location of the Circle object using a Point object as a parameter. This method is similar to the Circle.offset() method, except that it takes a Point object as a parameter.

Parameters
Name Type Description
point Point

A Point object to use to offset this Circle object (or any valid object with exposed x and y properties).

Returns
Circle -

This Circle object.

Source code: geom/Circle.js, line 202

setTo(x, y, diameter) → {Circle}

Sets the members of Circle to the specified values.

Parameters
Name Type Description
x number

The x coordinate of the center of the circle.

y number

The y coordinate of the center of the circle.

diameter number

The diameter of the circle.

Returns
Circle -

This circle object.

Source code: geom/Circle.js, line 76

toString() → {string}

Returns a string representation of this object.

Returns
string -

a string representation of the instance.

Source code: geom/Circle.js, line 212