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`java.lang.Object`

`java.awt.geom.QuadCurve2D`

`java.awt.geom.QuadCurve2D.Double`

**Enclosing Class:**- QuadCurve2D

**Implemented Interfaces:**- Cloneable, Shape

`public static class `**QuadCurve2D.Double**

`extends QuadCurve2D`

A two-dimensional curve that is parameterized with a quadratic
function and stores coordinate values in double-precision
floating-point format.

**See Also:**`QuadCurve2D.Float`

## Nested Class Summary

### Nested classes/interfaces inherited from class java.awt.geom.QuadCurve2D

`QuadCurve2D.Double`

,`QuadCurve2D.Float`

## Field Summary

`double`

`ctrlx`

- The
*x*coordinate of the curve’s control point.

`double`

`ctrly`

- The
*y*coordinate of the curve’s control point.

`double`

`x1`

- The
*x*coordinate of the curve’s start point.

`double`

`x2`

- The
*x*coordinate of the curve’s end point.

`double`

`y1`

- The
*y*coordinate of the curve’s start point.

`double`

`y2`

- The
*y*coordinate of the curve’s end point.

## Constructor Summary

`Double()`

- Constructs a new QuadCurve2D that stores its coordinate values in double-precision floating-point format.

`Double(double x1, double y1, double cx, double cy, double x2, double y2)`

- Constructs a new QuadCurve2D that stores its coordinate values in double-precision floating-point format, specifying the initial position of each point.

## Method Summary

`Rectangle2D`

`getBounds2D()`

- Determines the smallest rectangle that encloses the curve’s start, end and control point.

`Point2D`

`getCtrlPt()`

- Returns the curve’s control point.

`double`

`getCtrlX()`

- Returns the
*x*coordinate of the curve’s control point.

`double`

`getCtrlY()`

- Returns the
*y*coordinate of the curve’s control point.

`Point2D`

`getP1()`

- Returns the curve’s start point.

`Point2D`

`getP2()`

- Returns the curve’s end point.

`double`

`getX1()`

- Returns the
*x*coordinate of the curve’s start point.

`double`

`getX2()`

- Returns the
*x*coordinate of the curve’s end point.

`double`

`getY1()`

- Returns the
*y*coordinate of the curve’s start point.

`double`

`getY2()`

- Returns the
*y*coordinate of the curve’s end point.

`void`

`setCurve(double x1, double y1, double cx, double cy, double x2, double y2)`

- Changes the geometry of the curve.

### Methods inherited from class java.awt.geom.QuadCurve2D

`clone`

,`contains`

,`contains`

,`contains`

,`contains`

,`getBounds`

,`getCtrlPt`

,`getCtrlX`

,`getCtrlY`

,`getFlatness`

,`getFlatness`

,`getFlatness`

,`getFlatnessSq`

,`getFlatnessSq`

,`getFlatnessSq`

,`getP1`

,`getP2`

,`getPathIterator`

,`getPathIterator`

,`getX1`

,`getX2`

,`getY1`

,`getY2`

,`intersects`

,`intersects`

,`setCurve`

,`setCurve`

,`setCurve`

,`setCurve`

,`setCurve`

,`solveQuadratic`

,`solveQuadratic`

,`subdivide`

,`subdivide`

,`subdivide`

### Methods inherited from class java.lang.Object

`clone`

,`equals`

,`extends Object> getClass`

,`finalize`

,`hashCode`

,`notify`

,`notifyAll`

,`toString`

,`wait`

,`wait`

,`wait`

public Double()

Constructs a new QuadCurve2D that stores its coordinate values in double-precision floating-point format. All points are initially at position (0, 0).

public Double(double x1, double y1, double cx, double cy, double x2, double y2)

Constructs a new QuadCurve2D that stores its coordinate values in double-precision floating-point format, specifying the initial position of each point.

Parameters:`x1`

- thexcoordinate of the curve’s start point.`y1`

- theycoordinate of the curve’s start point.`cx`

- thexcoordinate of the curve’s control point.`cy`

- theycoordinate of the curve’s control point.`x2`

- thexcoordinate of the curve’s end point.`y2`

- theycoordinate of the curve’s end point.

public Rectangle2D getBounds2D()

Determines the smallest rectangle that encloses the curve’s start, end and control point. As the illustration below shows, the invisible control point may cause the bounds to be much larger than the area that is actually covered by the curve.

Specified by:- getBounds2D in interface Shape

public Point2D getCtrlPt()

Returns the curve’s control point.

Overrides:- getCtrlPt in interface QuadCurve2D

public double getCtrlX()

Returns thexcoordinate of the curve’s control point.

Overrides:- getCtrlX in interface QuadCurve2D

public double getCtrlY()

Returns theycoordinate of the curve’s control point.

Overrides:- getCtrlY in interface QuadCurve2D

public Point2D getP1()

Returns the curve’s start point.

Overrides:- getP1 in interface QuadCurve2D

public double getX1()

Returns thexcoordinate of the curve’s start point.

Overrides:- getX1 in interface QuadCurve2D

public double getX2()

Returns thexcoordinate of the curve’s end point.

Overrides:- getX2 in interface QuadCurve2D

public double getY1()

Returns theycoordinate of the curve’s start point.

Overrides:- getY1 in interface QuadCurve2D

public double getY2()

Returns theycoordinate of the curve’s end point.

Overrides:- getY2 in interface QuadCurve2D

public void setCurve(double x1, double y1, double cx, double cy, double x2, double y2)

Changes the geometry of the curve.

Overrides:- setCurve in interface QuadCurve2D

Parameters:`x1`

- thexcoordinate of the curve’s new start point.`y1`

- theycoordinate of the curve’s new start point.`cx`

- thexcoordinate of the curve’s new control point.`cy`

- theycoordinate of the curve’s new control point.`x2`

- thexcoordinate of the curve’s new end point.`y2`

- theycoordinate of the curve’s new end point.

QuadCurve2D.java -- represents a parameterized quadratic curve in 2-D space
Copyright (C) 2002, 2003, 2004 Free Software Foundation
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