java.awt.geom

Class QuadCurve2D.Double

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:

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.

Field Detail

ctrlx

public double ctrlx

The x coordinate of the curve’s control point.

ctrly

public double ctrly

The y coordinate of the curve’s control point.

x1

public double x1

The x coordinate of the curve’s start point.

x2

public double x2

The x coordinate of the curve’s end point.

y1

public double y1

The y coordinate of the curve’s start point.

y2

public double y2

The y coordinate of the curve’s end point.

Constructor Detail

Double

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).

Double

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 the x coordinate of the curve’s start point. y1 the y coordinate of the curve’s start point. cx the x coordinate of the curve’s control point. cy the y coordinate of the curve’s control point. x2 the x coordinate of the curve’s end point. y2 the y coordinate of the curve’s end point.

Method Detail

getBounds2D

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.

An illustration of the bounds of a QuadCurve2D

getCtrlPt

public Point2D getCtrlPt()

Returns the curve’s control point.

getCtrlX

public double getCtrlX()

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

getCtrlY

public double getCtrlY()

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

getP1

public Point2D getP1()

Returns the curve’s start point.

getP2

public Point2D getP2()

Returns the curve’s end point.

getX1

public double getX1()

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

getX2

public double getX2()

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

getY1

public double getY1()

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

getY2

public double getY2()

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

setCurve

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

Changes the geometry of the curve.

Parameters: x1 the x coordinate of the curve’s new start point. y1 the y coordinate of the curve’s new start point. cx the x coordinate of the curve’s new control point. cy the y coordinate of the curve’s new control point. x2 the x coordinate of the curve’s new end point. y2 the y coordinate of the curve’s new end point.