Computes various kinds of common geometric shapes. Provides various ways of specifying the location and extent and rotations of the generated shapes, as well as number of line segments used to form them.

Example of usage:

  GeometricShapeFactory gsf = new GeometricShapeFactory();
  gsf.setSize(100);
  gsf.setNumPoints(100);
  gsf.setBase(new Coordinate(100, 100));
  gsf.setRotation(0.5);
  Polygon rect = gsf.createRectangle();

Other

version: 1.7

public GeometricShapeFactory()

Create a shape factory which will create shapes using the default GeometryFactory.

public GeometricShapeFactory(GeometryFactory geomFact)

Create a shape factory which will create shapes using the given GeometryFactory.

Parameters:: geomFact - geomFact the factory to use

public void setEnvelope(Envelope env)

public void setBase(Coordinate base)

Sets the location of the shape by specifying the base coordinate (which in most cases is the lower left point of the envelope containing the shape).

Parameters:: base - base the base coordinate of the shape

public void setCentre(Coordinate centre)

Sets the location of the shape by specifying the centre of the shape's bounding box

Parameters:: centre - centre the centre coordinate of the shape

public void setNumPoints(int nPts)

Sets the total number of points in the created Geometry. The created geometry will have no more than this number of points, unless more are needed to create a valid geometry.

public void setSize(double size)

Sets the size of the extent of the shape in both x and y directions.

Parameters:: size - size the size of the shape's extent

public void setWidth(double width)

Sets the width of the shape.

Parameters:: width - width the width of the shape

public void setHeight(double height)

Sets the height of the shape.

Parameters:: height - height the height of the shape

public void setRotation(double radians)

Sets the rotation angle to use for the shape. The rotation is applied relative to the centre of the shape.

Parameters:: radians - radians the rotation angle in radians.

protected Geometry rotate(Geometry geom)

public Polygon createRectangle()

Creates a rectangular Polygon.

Returns:: a rectangular Polygon

public Polygon createCircle()

Creates a circular or elliptical Polygon.

Returns:: a circle or ellipse

public Polygon createEllipse()

Creates an elliptical Polygon. If the supplied envelope is square the result will be a circle.

Returns:: an ellipse or circle

public Polygon createSquircle()

Creates a squircular Polygon.

Returns:: a squircle

public Polygon createSupercircle(double power)

Creates a supercircular Polygon of a given positive power.

Returns:: a supercircle

public LineString createArc(double startAng, double angExtent)

Creates an elliptical arc, as a LineString. The arc is always created in a counter-clockwise direction. This can easily be reversed if required by using {#link LineString.reverse()}

Parameters:: startAng - startAng start angle in radians; angExtent - angExtent size of angle in radians

Returns:: an elliptical arc

public Polygon createArcPolygon(double startAng, double angExtent)

Creates an elliptical arc polygon. The polygon is formed from the specified arc of an ellipse and the two radii connecting the endpoints to the centre of the ellipse.

Parameters:: startAng - startAng start angle in radians; angExtent - angExtent size of angle in radians

Returns:: an elliptical arc polygon

protected Coordinate coord(double x, double y)

protected Coordinate coordTrans(double x, double y, Coordinate trans)