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QuadCurve2D.Double (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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java.awt.geom
Class QuadCurve2D.Double

java.lang.Object
  extended by java.awt.geom.QuadCurve2D
      extended by java.awt.geom.QuadCurve2D.Double
All Implemented Interfaces:
Shape, Serializable, Cloneable
Enclosing class:
QuadCurve2D
public static class QuadCurve2D.Double
extends QuadCurve2D
implements Serializable

A quadratic parametric curve segment specified with double coordinates.

Since:
1.2
See Also:
Serialized Form

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 control point of the quadratic curve segment.
 double ctrly
          The Y coordinate of the control point of the quadratic curve segment.
 double x1
          The X coordinate of the start point of the quadratic curve segment.
 double x2
          The X coordinate of the end point of the quadratic curve segment.
 double y1
          The Y coordinate of the start point of the quadratic curve segment.
 double y2
          The Y coordinate of the end point of the quadratic curve segment.
 
Constructor Summary
QuadCurve2D.Double()
          Constructs and initializes a QuadCurve2D with coordinates (0, 0, 0, 0, 0, 0).
QuadCurve2D.Double(double x1, double y1, double ctrlx, double ctrly, double x2, double y2)
          Constructs and initializes a QuadCurve2D from the specified double coordinates.
 
Method Summary
 Rectangle2D getBounds2D()
          Returns a high precision and more accurate bounding box of the Shape than the getBounds method.
 Point2D getCtrlPt()
          Returns the control point.
 double getCtrlX()
          Returns the X coordinate of the control point in double precision.
 double getCtrlY()
          Returns the Y coordinate of the control point in double precision.
 Point2D getP1()
          Returns the start point.
 Point2D getP2()
          Returns the end point.
 double getX1()
          Returns the X coordinate of the start point in double in precision.
 double getX2()
          Returns the X coordinate of the end point in double precision.
 double getY1()
          Returns the Y coordinate of the start point in double precision.
 double getY2()
          Returns the Y coordinate of the end point in double precision.
 void setCurve(double x1, double y1, double ctrlx, double ctrly, double x2, double y2)
          Sets the location of the end points and control point of this curve to the specified double coordinates.
 
Methods inherited from class java.awt.geom.QuadCurve2D
clone, contains, contains, contains, contains, getBounds, getFlatness, getFlatness, getFlatness, getFlatnessSq, getFlatnessSq, getFlatnessSq, getPathIterator, getPathIterator, intersects, intersects, setCurve, setCurve, setCurve, setCurve, solveQuadratic, solveQuadratic, subdivide, subdivide, subdivide
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

x1

public double x1
The X coordinate of the start point of the quadratic curve segment.

Since:
1.2

y1

public double y1
The Y coordinate of the start point of the quadratic curve segment.

Since:
1.2

ctrlx

public double ctrlx
The X coordinate of the control point of the quadratic curve segment.

Since:
1.2

ctrly

public double ctrly
The Y coordinate of the control point of the quadratic curve segment.

Since:
1.2

x2

public double x2
The X coordinate of the end point of the quadratic curve segment.

Since:
1.2

y2

public double y2
The Y coordinate of the end point of the quadratic curve segment.

Since:
1.2
Constructor Detail

QuadCurve2D.Double

public QuadCurve2D.Double()
Constructs and initializes a QuadCurve2D with coordinates (0, 0, 0, 0, 0, 0).

Since:
1.2

QuadCurve2D.Double

public QuadCurve2D.Double(double x1,
                          double y1,
                          double ctrlx,
                          double ctrly,
                          double x2,
                          double y2)
Constructs and initializes a QuadCurve2D from the specified double coordinates.

Parameters:
x1 - the X coordinate of the start point
y1 - the Y coordinate of the start point
ctrlx - the X coordinate of the control point
ctrly - the Y coordinate of the control point
x2 - the X coordinate of the end point
y2 - the Y coordinate of the end point
Since:
1.2
Method Detail

getX1

public double getX1()
Returns the X coordinate of the start point in double in precision.

Specified by:
getX1 in class QuadCurve2D
Returns:
the X coordinate of the start point.
Since:
1.2

getY1

public double getY1()
Returns the Y coordinate of the start point in double precision.

Specified by:
getY1 in class QuadCurve2D
Returns:
the Y coordinate of the start point.
Since:
1.2

getP1

public Point2D getP1()
Returns the start point.

Specified by:
getP1 in class QuadCurve2D
Returns:
a Point2D that is the start point of this QuadCurve2D.
Since:
1.2

getCtrlX

public double getCtrlX()
Returns the X coordinate of the control point in double precision.

Specified by:
getCtrlX in class QuadCurve2D
Returns:
X coordinate the control point
Since:
1.2

getCtrlY

public double getCtrlY()
Returns the Y coordinate of the control point in double precision.

Specified by:
getCtrlY in class QuadCurve2D
Returns:
the Y coordinate of the control point.
Since:
1.2

getCtrlPt

public Point2D getCtrlPt()
Returns the control point.

Specified by:
getCtrlPt in class QuadCurve2D
Returns:
a Point2D that is the control point of this Point2D.
Since:
1.2

getX2

public double getX2()
Returns the X coordinate of the end point in double precision.

Specified by:
getX2 in class QuadCurve2D
Returns:
the x coordiante of the end point.
Since:
1.2

getY2

public double getY2()
Returns the Y coordinate of the end point in double precision.

Specified by:
getY2 in class QuadCurve2D
Returns:
the Y coordinate of the end point.
Since:
1.2

getP2

public Point2D getP2()
Returns the end point.

Specified by:
getP2 in class QuadCurve2D
Returns:
a Point object that is the end point of this Point2D.
Since:
1.2

setCurve

public void setCurve(double x1,
                     double y1,
                     double ctrlx,
                     double ctrly,
                     double x2,
                     double y2)
Sets the location of the end points and control point of this curve to the specified double coordinates.

Specified by:
setCurve in class QuadCurve2D
Parameters:
x1 - the X coordinate of the start point
y1 - the Y coordinate of the start point
ctrlx - the X coordinate of the control point
ctrly - the Y coordinate of the control point
x2 - the X coordinate of the end point
y2 - the Y coordinate of the end point
Since:
1.2

getBounds2D

public Rectangle2D getBounds2D()
Returns a high precision and more accurate bounding box of the Shape than the getBounds method. Note that there is no guarantee that the returned Rectangle2D is the smallest bounding box that encloses the Shape, only that the Shape lies entirely within the indicated Rectangle2D. The bounding box returned by this method is usually tighter than that returned by the getBounds method and never fails due to overflow problems since the return value can be an instance of the Rectangle2D that uses double precision values to store the dimensions.

Specified by:
getBounds2D in interface Shape
Returns:
an instance of Rectangle2D that is a high-precision bounding box of the Shape.
Since:
1.2
See Also:
Shape.getBounds()
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Java™ Platform
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For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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