net.sf.jcgm.core
Class EllipticalArc

java.lang.Object
  net.sf.jcgm.core.Command
      net.sf.jcgm.core.EllipseElement
          net.sf.jcgm.core.EllipticalArc

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

EllipticalArcClose

public class EllipticalArc
extends EllipseElement

Class=2, Element=7

Version:

$Id: EllipticalArc.java 46 2011-12-14 08:26:44Z phica $

Author:

xphc (Philippe Cadé), BBNT Solutions

Field Summary

protected double	endVectorDeltaX
protected double	endVectorDeltaY
protected double	startVectorDeltaX
protected double	startVectorDeltaY

Fields inherited from class net.sf.jcgm.core.EllipseElement

center, ellipse, firstConjugateDiameterEndPoint, secondConjugateDiameterEndPoint

Fields inherited from class net.sf.jcgm.core.Command

args, currentArg

Constructor Summary

EllipticalArc(int ec, int eid, int l, java.io.DataInput in)

Method Summary

protected void	applyArcs(CGMDisplay d, java.awt.geom.AffineTransform transform) {@inheritDoc) From the specification:
protected java.awt.Shape	createShape(double centerFirstDistance, double centerSecondDistance) Creates the ellipse around the origin.
protected int	getClosureType()
void	paint(CGMDisplay d)
java.lang.String	toString()

Methods inherited from class net.sf.jcgm.core.EllipseElement

distance, initializeShape

Methods inherited from class net.sf.jcgm.core.Command

alignOnWord, clone, getElementClass, getElementCode, info, makeByte, makeChar, makeColorIndex, makeColorIndex, makeDirectColor, makeEnum, makeFixedPoint, makeFixedString, makeFloat32, makeFloatingPoint, makeFloatingPoint32, makeIndex, makeInt, makeName, makePoint, makeReal, makeSDR, makeSignedInt16, makeSignedInt24, makeSignedInt32, makeSignedInt8, makeSizeSpecification, makeString, makeUInt, makeVc, makeVdc, printShape, read, readCommand, sizeOfDirectColor, sizeOfEnum, sizeOfInt, sizeOfPoint, sizeOfVdc, unimplemented, unsupported

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

startVectorDeltaX

protected double startVectorDeltaX

startVectorDeltaY

protected double startVectorDeltaY

endVectorDeltaX

protected double endVectorDeltaX

endVectorDeltaY

protected double endVectorDeltaY

Constructor Detail

EllipticalArc

public EllipticalArc(int ec,
                     int eid,
                     int l,
                     java.io.DataInput in)
              throws java.io.IOException

Throws:

java.io.IOException

Method Detail

createShape

protected java.awt.Shape createShape(double centerFirstDistance,
                                     double centerSecondDistance)

Description copied from class: EllipseElement

Creates the ellipse around the origin.

Overrides:

createShape in class EllipseElement

Parameters:

centerFirstDistance - Width of the ellipse

centerSecondDistance - Height of the ellipse

Returns:

getClosureType

protected int getClosureType()

applyArcs

protected void applyArcs(CGMDisplay d,
                         java.awt.geom.AffineTransform transform)

{@inheritDoc) From the specification:

The defined arc begins at the intersection of the ellipse and the start ray and follows the ellipse to the intersection of the ellipse and the end ray in the direction defined as follows. A "conjugate radius" is defined to be half of a conjugate diameter. Letting the centre point be labelled M, the first CDP end point P1, and the second CDP end point P2, then the line segments M-P1 and M-P2 define two conjugate radii, referred to in what follows as the first conjugate radius and the second conjugate radius respectively. The conjugate radii meet at M and define two angles: the sum of the two angles is 360°, one angle is less than 180° and the other is greater than 180°. The drawing direction of the elliptical arc is the direction from the first conjugate radius to the second conjugate radius through the smaller of these two angles.

Overrides:

applyArcs in class EllipseElement

transform - The inverted transformation that is applied to the ellipse

paint

public void paint(CGMDisplay d)

Overrides:

paint in class EllipseElement

toString

public java.lang.String toString()

Overrides:

toString in class EllipseElement