org.eclipse.gef.geometry.planar

Class QuadraticCurve

java.lang.Object

org.eclipse.gef.geometry.planar.BezierCurve

org.eclipse.gef.geometry.planar.QuadraticCurve

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, ICurve, IGeometry, IRotatable<BezierCurve>, IScalable<BezierCurve>, ITranslatable<BezierCurve>

public class QuadraticCurve
extends BezierCurve

Represents the geometric shape of a quadratic Bézier curve.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
QuadraticCurve(double... coordinates) Constructs a new QuadraticCurve from the given sequence of x- and y-coordinates of the start-, the control-, and the end-point.
QuadraticCurve(double x1, double y1, double ctrlX, double ctrlY, double x2, double y2) Constructs a new QuadraticCurve object from the given point coordinates.
QuadraticCurve(Point... points) Constructs a new QuadraticCurve from the given sequence of Points formed by start-, control-, and end-point.
QuadraticCurve(Point p1, Point pCtrl, Point p2) Constructs a new QuadraticCurve object from the given points.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone() Overridden with public visibility as recommended within Cloneable .
QuadraticCurve	getCopy() Returns a new QuadraticCurve, which has the same start, end, and control point coordinates as this one.
Point	getCtrl() Get the control point.
double	getCtrlX() Get the control point's x-coordinate.
double	getCtrlY() Get the control point's y-coordinate.
CubicCurve	getElevated() Degree elevation: Returns a CubicCurve representation of this QuadraticCurve.
QuadraticCurve	getTransformed(AffineTransform t) Default implementation returning a transformed Path representation of this IGeometry.
int	hashCode()
QuadraticCurve	setCtrl(Point ctrl) Sets the curve's control point.
QuadraticCurve	setCtrlX(double ctrlX) Sets the x-coordinate of the curve's control point.
QuadraticCurve	setCtrlY(double ctrlY) Sets the y-coordinate of the curve's control point.
QuadraticCurve[]	split(double t) Splits this QuadraticCurve using the de Casteljau algorithm at parameter t into two separate QuadraticCurve objects.
Path	toPath() Transform the QuadraticCurve object to a Path object with the same shape.
java.lang.String	toString()
boolean	touches(IGeometry g) Returns true if the input IGeometry touches this IGeometry, i.e. there is at least one common point.

Methods inherited from class org.eclipse.gef.geometry.planar.BezierCurve

contains, contains, equals, get, getBounds, getClipped, getControlBounds, getDerivative, getIntersections, getIntersections, getOffset, getOverlap, getOverlaps, getP1, getP2, getParameterAt, getPoint, getPoints, getProjection, getRotatedCCW, getRotatedCCW, getRotatedCCW, getRotatedCW, getRotatedCW, getRotatedCW, getScaled, getScaled, getScaled, getScaled, getScaled, getScaled, getTranslated, getTranslated, getX1, getX2, getY1, getY2, intersects, overlaps, overlaps, rotateCCW, rotateCCW, rotateCCW, rotateCW, rotateCW, rotateCW, scale, scale, scale, scale, scale, scale, setP1, setP2, setPoint, toBezier, toCubic, toLine, toLineStrip, toLineStrip, toPoints, toQuadratic, translate, translate

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.eclipse.gef.geometry.planar.IGeometry

touches

Constructor Detail

QuadraticCurve

public QuadraticCurve(double... coordinates)

Constructs a new QuadraticCurve from the given sequence of x- and y-coordinates of the start-, the control-, and the end-point.

Parameters:

coordinates - a sequence containing the x- and y-coordinates

See Also:

QuadraticCurve(double, double, double, double, double, double)

QuadraticCurve

public QuadraticCurve(double x1,
                      double y1,
                      double ctrlX,
                      double ctrlY,
                      double x2,
                      double y2)

Constructs a new QuadraticCurve object from the given point coordinates.

Parameters:

x1 - the start point's x-coordinate

y1 - the start point's y-coordinate

ctrlX - the control point's x-coordinate

ctrlY - the control point's y-coordinate

x2 - the end point's x-coordinate

y2 - the end point's y-coordinate

QuadraticCurve

public QuadraticCurve(Point... points)

Constructs a new QuadraticCurve from the given sequence of Points formed by start-, control-, and end-point.

Parameters:

points - the control Points

See Also:

QuadraticCurve(Point, Point, Point)

QuadraticCurve

public QuadraticCurve(Point p1,
                      Point pCtrl,
                      Point p2)

Constructs a new QuadraticCurve object from the given points.

Parameters:

p1 - the start point

pCtrl - the control point

p2 - the end point

Method Detail

getCopy

public QuadraticCurve getCopy()

Returns a new QuadraticCurve, which has the same start, end, and control point coordinates as this one.

Specified by:

getCopy in interface IGeometry

Overrides:

getCopy in class BezierCurve

Returns:

a new QuadraticCurve with the same start, end, and control point coordinates

getCtrl

public Point getCtrl()

Get the control point.

Returns:

a Point object representing the control point

getCtrlX

public double getCtrlX()

Get the control point's x-coordinate.

Returns:

the control point's x-coordinate

getCtrlY

public double getCtrlY()

Get the control point's y-coordinate.

Returns:

the control point's y-coordinate

getElevated

public CubicCurve getElevated()

Degree elevation: Returns a CubicCurve representation of this QuadraticCurve.

Overrides:

getElevated in class BezierCurve

Returns:

A CubicCurve that represents this QuadraticCurve.

getTransformed

public QuadraticCurve getTransformed(AffineTransform t)

Default implementation returning a transformed Path representation of this IGeometry. Subclasses may override this method to return a more specific representation.

Specified by:

getTransformed in interface IGeometry

Overrides:

getTransformed in class BezierCurve

Parameters:

t - The AffineTransform to be applied

Returns:

a transformed Path representation of this IGeometry

See Also:

IGeometry.getTransformed(AffineTransform)

setCtrl

public QuadraticCurve setCtrl(Point ctrl)

Sets the curve's control point.

Parameters:

ctrl - The new curve's control point.

Returns:

this for convenience

setCtrlX

public QuadraticCurve setCtrlX(double ctrlX)

Sets the x-coordinate of the curve's control point.

Parameters:

ctrlX - The new x-coordinate of the curve's control point.

Returns:

this for convenience

setCtrlY

public QuadraticCurve setCtrlY(double ctrlY)

Sets the y-coordinate of the curve's control point.

Parameters:

ctrlY - The y-coordinate of the curve's control point.

Returns:

this for convenience

split

public QuadraticCurve[] split(double t)

Splits this QuadraticCurve using the de Casteljau algorithm at parameter t into two separate QuadraticCurve objects. The returned QuadraticCurves are the curves for [0, t] and [t, 1].

Overrides:

split in class BezierCurve

Parameters:

t - in range [0,1]

Returns:

two QuadraticCurve objects constituting the original curve: 1. [0, t] 2. [t, 1]

toPath

public Path toPath()

Transform the QuadraticCurve object to a Path object with the same shape.

Specified by:

toPath in interface IGeometry

Overrides:

toPath in class BezierCurve

Returns:

a Path object representing the curve

toString

public java.lang.String toString()

Overrides:

toString in class BezierCurve

clone

public java.lang.Object clone()

Overridden with public visibility as recommended within Cloneable .

Overrides:

clone in class java.lang.Object

hashCode

public final int hashCode()

Overrides:

hashCode in class java.lang.Object

See Also:

Object.hashCode()

touches

public boolean touches(IGeometry g)

Description copied from interface: IGeometry

Returns true if the input IGeometry touches this IGeometry, i.e. there is at least one common point.

Specified by:

touches in interface IGeometry

Parameters:

g - The IGeometry for the intersection test

Returns:

true if the input IGeometry and this IGeometry have at least one common point.