math.geom2d.curve
Class PolyCurve2D<T extends ContinuousCurve2D>

java.lang.Object
  math.geom2d.curve.CurveSet2D<T>
      math.geom2d.curve.CurveArray2D<T>
          math.geom2d.curve.PolyCurve2D<T>

All Implemented Interfaces:

Serializable, Cloneable, Iterable<T>, ContinuousCurve2D, Curve2D, Shape2D

Direct Known Subclasses:

PolyBezierCurve2D, PolyCubicBezierCurve2D, PolyOrientedCurve2D

public class PolyCurve2D<T extends ContinuousCurve2D>
extends CurveArray2D<T>
implements ContinuousCurve2D

A PolyCurve2D is a set of piecewise smooth curve arcs, such that the end of a curve is the beginning of the next curve, and such that they do not intersect nor self-intersect.

Author:

dlegland

See Also:

Serialized Form

Field Summary

protected boolean

closed flag for indicating if the curve is closed or not (default is open)

Fields inherited from class math.geom2d.curve.CurveSet2D

curves

Fields inherited from interface math.geom2d.Shape2D

ACCURACY

Constructor Summary

PolyCurve2D()

PolyCurve2D(Collection<? extends T> curves)

PolyCurve2D(Collection<? extends T> curves, boolean closed)

PolyCurve2D(int n)

PolyCurve2D(T[] curves)

PolyCurve2D(T[] curves, boolean closed)

Method Summary

GeneralPath	appendPath(GeneralPath path) Append the path of the curve to the given path.
CurveSet2D<? extends ContinuousCurve2D>	clip(Box2D box) Clip the PolyCurve2D by a box.
void	draw(Graphics2D g2) Draws the curve on the given Graphics2D object.
boolean	equals(Object obj) Returns true if obj is a CurveArray2D with the same number of curves, and such that each curve belongs to both objects.
Polyline2D	getAsPolyline(int n) Returns an approximation of the curve as a polyline with n line segments.
Collection<? extends PolyCurve2D<?>>	getContinuousCurves() Returns the collection of continuous curves which constitute this curve.
GeneralPath	getGeneralPath()
Vector2D	getLeftTangent(double t)
PolyCurve2D<? extends ContinuousCurve2D>	getReverseCurve() Returns the curve with same trace on the plane with parametrization in reverse order.
Vector2D	getRightTangent(double t)
Collection<? extends SmoothCurve2D>	getSmoothPieces() Returns a collection containing only instances of SmoothCurve2D.
PolyCurve2D<? extends ContinuousCurve2D>	getSubCurve(double t0, double t1) Returns an instance of PolyCurve2D.
boolean	isClosed() Returns true if the PolyCurve2D is closed.
void	setClosed(boolean b) Toggle the 'closed' flag of the polycurve.
PolyCurve2D<? extends ContinuousCurve2D>	transform(AffineTransform2D trans) Transforms each curve, and build a new CurveArray2D with the set of transformed curves.
protected static <T extends ContinuousCurve2D> Collection<T>	wrapCurve(T curve)

Methods inherited from class math.geom2d.curve.CurveArray2D

addCurve, clearCurves, clone, contains, contains, containsCurve, getAsAWTShape, getBoundingBox, getChildCurve, getCurve, getCurveIndex, getCurveNumber, getCurves, getDistance, getDistance, getFirstCurve, getFirstPoint, getGlobalPosition, getIntersections, getLastCurve, getLastPoint, getLocalPosition, getPoint, getPosition, getSingularPoints, getT0, getT1, isBounded, isEmpty, isSingular, iterator, project, removeCurve

Methods inherited from class math.geom2d.curve.CurveSet2D

fromUnitSegment, toUnitSegment

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface math.geom2d.curve.Curve2D

clone, getAsAWTShape, getFirstPoint, getIntersections, getLastPoint, getPoint, getPosition, getSingularPoints, getT0, getT1, isSingular, project

Methods inherited from interface math.geom2d.Shape2D

contains, contains, getBoundingBox, getDistance, getDistance, isBounded, isEmpty

Field Detail

closed

protected boolean closed

flag for indicating if the curve is closed or not (default is open)

Constructor Detail

PolyCurve2D

public PolyCurve2D()

PolyCurve2D

public PolyCurve2D(int n)

PolyCurve2D

public PolyCurve2D(T[] curves)

PolyCurve2D

public PolyCurve2D(T[] curves,
                   boolean closed)

PolyCurve2D

public PolyCurve2D(Collection<? extends T> curves)

PolyCurve2D

public PolyCurve2D(Collection<? extends T> curves,
                   boolean closed)

Method Detail

wrapCurve

protected static <T extends ContinuousCurve2D> Collection<T> wrapCurve(T curve)

setClosed

public void setClosed(boolean b)

Toggle the 'closed' flag of the polycurve.

getLeftTangent

public Vector2D getLeftTangent(double t)

Specified by:

getLeftTangent in interface ContinuousCurve2D

getRightTangent

public Vector2D getRightTangent(double t)

Specified by:

getRightTangent in interface ContinuousCurve2D

isClosed

public boolean isClosed()

Returns true if the PolyCurve2D is closed.

Specified by:

isClosed in interface ContinuousCurve2D

getAsPolyline

public Polyline2D getAsPolyline(int n)

Description copied from interface: ContinuousCurve2D

Returns an approximation of the curve as a polyline with n line segments. If the curve is closed, the method should return an instance of Ring2D.

Specified by:

getAsPolyline in interface ContinuousCurve2D

Parameters:

n - the number of line segments

Returns:

a polyline with n line segments.

getSmoothPieces

public Collection<? extends SmoothCurve2D> getSmoothPieces()

Returns a collection containing only instances of SmoothCurve2D.

Specified by:

getSmoothPieces in interface ContinuousCurve2D

Returns:

a collection of SmoothCurve2D

getContinuousCurves

public Collection<? extends PolyCurve2D<?>> getContinuousCurves()

Description copied from interface: Curve2D

Returns the collection of continuous curves which constitute this curve.

Specified by:

getContinuousCurves in interface Curve2D

Overrides:

getContinuousCurves in class CurveArray2D<T extends ContinuousCurve2D>

Returns:

a collection of continuous curves.

getReverseCurve

public PolyCurve2D<? extends ContinuousCurve2D> getReverseCurve()

Description copied from interface: Curve2D

Returns the curve with same trace on the plane with parametrization in reverse order.

Specified by:

getReverseCurve in interface ContinuousCurve2D

Specified by:

getReverseCurve in interface Curve2D

Overrides:

getReverseCurve in class CurveArray2D<T extends ContinuousCurve2D>

getSubCurve

public PolyCurve2D<? extends ContinuousCurve2D> getSubCurve(double t0,
                                                            double t1)

Returns an instance of PolyCurve2D. If t0>t1 and curve is not closed, return a PolyCurve2D without curves inside.

Specified by:

getSubCurve in interface ContinuousCurve2D

Specified by:

getSubCurve in interface Curve2D

Overrides:

getSubCurve in class CurveArray2D<T extends ContinuousCurve2D>

Parameters:

t0 - position of the start of the sub-curve

t1 - position of the end of the sub-curve

Returns:

the portion of original curve comprised between t0 and t1.

clip

public CurveSet2D<? extends ContinuousCurve2D> clip(Box2D box)

Clip the PolyCurve2D by a box. The result is an instance of CurveSet2D, which contains only instances of ContinuousCurve2D. If the PolyCurve2D is not clipped, the result is an instance of CurveSet2D which contains 0 curves.

Specified by:

clip in interface ContinuousCurve2D

Specified by:

clip in interface Curve2D

Specified by:

clip in interface Shape2D

Overrides:

clip in class CurveArray2D<T extends ContinuousCurve2D>

Parameters:

box - the clipping box

Returns:

the clipped shape

transform

public PolyCurve2D<? extends ContinuousCurve2D> transform(AffineTransform2D trans)

Description copied from class: CurveArray2D

Transforms each curve, and build a new CurveArray2D with the set of transformed curves.

Specified by:

transform in interface ContinuousCurve2D

Specified by:

transform in interface Curve2D

Specified by:

transform in interface Shape2D

Overrides:

transform in class CurveArray2D<T extends ContinuousCurve2D>

Parameters:

trans - an affine transform

Returns:

the transformed shape

appendPath

public GeneralPath appendPath(GeneralPath path)

Description copied from interface: ContinuousCurve2D

Append the path of the curve to the given path.

Specified by:

appendPath in interface ContinuousCurve2D

Parameters:

path - a path to modify

Returns:

the modified path

getGeneralPath

public GeneralPath getGeneralPath()

Overrides:

getGeneralPath in class CurveArray2D<T extends ContinuousCurve2D>

draw

public void draw(Graphics2D g2)

Description copied from interface: Curve2D

Draws the curve on the given Graphics2D object.

Specified by:

draw in interface Curve2D

Specified by:

draw in interface Shape2D

Overrides:

draw in class CurveArray2D<T extends ContinuousCurve2D>

Parameters:

g2 - the graphics to draw the curve

equals

public boolean equals(Object obj)

Description copied from class: CurveArray2D

Returns true if obj is a CurveArray2D with the same number of curves, and such that each curve belongs to both objects.

Overrides:

equals in class CurveArray2D<T extends ContinuousCurve2D>