Class: Circle

Extends

• SimpleGeometry

Methods

applyTransform(transformFn) inherited

geom/SimpleGeometry.js, line 206

Apply a transform function to the coordinates of the geometry. The geometry is modified in place. If you do not want the geometry modified in place, first clone() it and then use this function on the clone.

Name	Type	Description
transformFn	TransformFunction	Transform function. Called with a flat array of geometry coordinates.

changed() inherited

Observable.js, line 68

Increases the revision counter and dispatches a 'change' event.

clone(){Circle}

geom/Circle.js, line 38

Make a complete copy of the geometry.

Returns:

Clone.

dispatchEvent(event){boolean | undefined} inherited

events/Target.js, line 85

Dispatches an event and calls all listeners listening for events of this type. The event parameter can either be a string or an Object with a type property.

Name	Type	Description
event	BaseEvent | string	Event object.

Returns:

false if anyone called preventDefault on the event object or if any of the listeners returned false.

get(key){*} inherited

Object.js, line 135

Gets a value.

Name	Type	Description
key	string	Key name.

Returns:

Value.

getCenter(){Coordinate}

geom/Circle.js, line 96

Return the center of the circle as coordinate.

Returns:

Center.

getClosestPoint(point, closestPoint){Coordinate} inherited

geom/Geometry.js, line 154

Return the closest point of the geometry to the passed point as coordinate.

Name	Type	Description
point	Coordinate	Point.
closestPoint	Coordinate | undefined	Closest point.

Returns:

Closest point.

getExtent(extent){Extent} inherited

geom/Geometry.js, line 187

Get the extent of the geometry.

Name	Type	Description
extent	Extent | undefined	Extent.

Returns:

extent Extent.

getFirstCoordinate(){Coordinate} inherited

geom/SimpleGeometry.js, line 68

Return the first coordinate of the geometry.

Returns:

First coordinate.

getKeys(){Array.<string>} inherited

Object.js, line 148

Get a list of object property names.

Returns:

List of property names.

getLastCoordinate(){Coordinate} inherited

geom/SimpleGeometry.js, line 84

Return the last coordinate of the geometry.

Returns:

Last point.

getLayout(){GeometryLayout} inherited

geom/SimpleGeometry.js, line 95

Return the layout of the geometry.

Returns:

Layout.

getProperties(){Object.<string, *>} inherited

Object.js, line 157

Get an object of all property names and values.

Returns:

Object.

getRadius(){number}

geom/Circle.js, line 122

Return the radius of the circle.

Returns:

Radius.

getRevision(){number} inherited

Observable.js, line 79

Get the version number for this object. Each time the object is modified, its version number will be incremented.

Returns:

Revision.

getType(){Type}

geom/Circle.js, line 141

Get the type of this geometry.

Returns:

Geometry type.

intersectsCoordinate(coordinate){boolean} inherited

geom/Geometry.js, line 167

Returns true if this geometry includes the specified coordinate. If the coordinate is on the boundary of the geometry, returns false.

Name	Type	Description
coordinate	Coordinate	Coordinate.

Returns:

Contains coordinate.

intersectsExtent(extent){boolean}

geom/Circle.js, line 151

Test if the geometry and the passed extent intersect.

Name	Type	Description
extent	Extent	Extent.

Returns:

true if the geometry and the extent intersect.

on(type, listener){EventsKey | Array<EventsKey>} inherited

Observable.js, line 152

Listen for a certain type of event.

Name	Type	Description
type	string | Array.<string>	The event type or array of event types.
listener	function	The listener function.

Returns:

Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.

once(type, listener){EventsKey | Array<EventsKey>} inherited

Observable.js, line 164

Listen once for a certain type of event.

Name	Type	Description
type	string | Array.<string>	The event type or array of event types.
listener	function	The listener function.

Returns:

Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.

rotate(angle, anchor)

geom/Circle.js, line 232

Rotate the geometry around a given coordinate. This modifies the geometry coordinates in place.

Name	Type	Description
angle	number	Rotation angle in counter-clockwise radians.
anchor	Coordinate	The rotation center.

scale(sx, sy, anchor) inherited

geom/SimpleGeometry.js, line 246

Scale the geometry (with an optional origin). This modifies the geometry coordinates in place.

Name	Type	Description
sx	number	The scaling factor in the x-direction.
sy	number | undefined	The scaling factor in the y-direction (defaults to sx).
anchor	Coordinate | undefined	The scale origin (defaults to the center of the geometry extent).

set(key, value, silent) inherited

Object.js, line 207

Sets a value.

Name	Type	Description
key	string	Key name.
value	*	Value.
silent	boolean | undefined	Update without triggering an event.

setCenter(center)

geom/Circle.js, line 173

Set the center of the circle as coordinate.

Name	Type	Description
center	Coordinate	Center.

setCenterAndRadius(center, radius, layout)

geom/Circle.js, line 193

Set the center (as coordinate) and the radius (as number) of the circle.

Name	Type	Description
center	Coordinate	Center.
radius	number	Radius.
layout	GeometryLayout | undefined	Layout.

setProperties(values, silent) inherited

Object.js, line 227

Sets a collection of key-value pairs. Note that this changes any existing properties and adds new ones (it does not remove any existing properties).

Name	Type	Description
values	Object.<string, *>	Values.
silent	boolean | undefined	Update without triggering an event.

setRadius(radius)

geom/Circle.js, line 220

Set the radius of the circle. The radius is in the units of the projection.

Name	Type	Description
radius	number	Radius.

simplify(tolerance){Geometry} inherited

geom/Geometry.js, line 233

Create a simplified version of this geometry. For linestrings, this uses the Douglas Peucker algorithm. For polygons, a quantization-based simplification is used to preserve topology.

Name	Type	Description
tolerance	number	The tolerance distance for simplification.

Returns:

A new, simplified version of the original geometry.

transform(source, destination){Circle}

geom/Circle.js, line 280

Transform each coordinate of the circle from one coordinate reference system to another. The geometry is modified in place. If you do not want the geometry modified in place, first clone() it and then use this function on the clone.

Internally a circle is currently represented by two points: the center of the circle [cx, cy], and the point to the right of the circle [cx + r, cy]. This transform function just transforms these two points. So the resulting geometry is also a circle, and that circle does not correspond to the shape that would be obtained by transforming every point of the original circle.

Name	Type	Description
source	ProjectionLike	The current projection. Can be a string identifier or a Projection object.
destination	ProjectionLike	The desired projection. Can be a string identifier or a Projection object.

Returns:

This geometry. Note that original geometry is modified in place.

translate(deltaX, deltaY)

geom/Circle.js, line 248

Translate the geometry. This modifies the geometry coordinates in place. If instead you want a new geometry, first clone() this geometry.

Name	Type	Description
deltaX	number	Delta X.
deltaY	number	Delta Y.

un(type, listener) inherited

Observable.js, line 173

Unlisten for a certain type of event.

Name	Type	Description
type	string | Array.<string>	The event type or array of event types.
listener	function	The listener function.

unset(key, silent) inherited

Object.js, line 251

Unsets a property.

Name	Type	Description
key	string	Key name.
silent	boolean | undefined	Unset without triggering an event.