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Java Platform 1.2 Beta 4 |
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java.lang.Object | +--java.awt.Polygon
Polygon class encapsulates a description of a
closed, two-dimensional region within a coordinate space. This
region is bounded by an arbitrary number of line segments, each of
which is one side of the polygon. Internally, a polygon
comprises of a list of (x, y) coordinate pairs,
where each pair defines a vertex of the polygon, and two
successive pairs are the endpoints of a line that is a side of the
polygon. The first and final pairs of (x, y)
points are joined by a line segment that closes the polygon.
| Field Summary | |
| protected Rectangle | bounds
|
| int | npoints
The total number of points. |
| int[] | xpoints
The array of x coordinates. |
| int[] | ypoints
The array of y coordinates. |
| Constructor Summary | |
| Polygon()
Creates an empty polygon. |
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| Polygon(int[] xpoints,
int[] ypoints,
int npoints)
Constructs and initializes a polygon from the specified parameters. |
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| Method Summary | |
| void | addPoint(int x,
int y)
Appends a point to this polygon. |
| boolean | contains(double x,
double y,
double w,
double h)
Test if the interior of the Shape entirely contains the given set of rectangular coordinates. |
| boolean | contains(double x,
double y)
Test if a given coordinate is inside the boundary of the shape. |
| boolean | contains(int x,
int y)
Determines whether the specified point is contained by this polygon. |
| boolean | contains(Point p)
Determines whether the specified point is inside the Polygon. |
| boolean | contains(Point2D p)
Test if a given Point is inside the boundary of the shape. |
| boolean | contains(Rectangle2D r)
Test if the interior of the Shape entirely contains the given Rectangle. |
| Rectangle | getBoundingBox()
Deprecated. As of JDK version 1.1, replaced by getBounds(). |
| Rectangle | getBounds()
Gets the bounding box of this polygon. |
| Rectangle2D | getBounds2D()
Return the high precision bounding box of the shape. |
| PathIterator | getPathIterator(AffineTransform at,
double flatness)
Return an iterator object that iterates along the boundary of the shape and provides access to a flattened view of the geometry of the outline of the shape. |
| PathIterator | getPathIterator(AffineTransform at)
Return an iterator object that iterates along the boundary of the shape and provides access to the geometry of the outline of the shape. |
| boolean | inside(int x,
int y)
Deprecated. As of JDK version 1.1, replaced by contains(int, int). |
| boolean | intersects(double x,
double y,
double w,
double h)
Test if the interior of the Shape intersects the interior of a given set of rectangular coordinates. |
| boolean | intersects(Rectangle2D r)
Test if the interior of the Shape intersects the interior of a given Rectangle. |
| void | translate(int deltaX,
int deltaY)
Translates the vertices by deltaX along the
x axis and by deltaY along the
y axis. |
| Methods inherited from class java.lang.Object | |
| clone , equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait | |
| Field Detail |
public int npoints
public int[] xpoints
public int[] ypoints
protected Rectangle bounds
| Constructor Detail |
public Polygon()
public Polygon(int[] xpoints,
int[] ypoints,
int npoints)
xpoints
- an array of x coordinates.
ypoints
- an array of y coordinates.
npoints
- the total number of points in the polygon.npoints is negative.| Method Detail |
public void translate(int deltaX,
int deltaY)
deltaX along the
x axis and by deltaY along the
y axis.
deltaX
- the amount to translate along the x axis
deltaY
- the amount to translate along the y axis
public void addPoint(int x,
int y)
If an operation that calculates the bounding box of this polygon
has already been performed, such as getBounds
or contains, then this method updates the bounding box.
x
- the x coordinate of the point.
y
- the y coordinate of the point.getBounds(),
contains(java.awt.Point)public Rectangle getBounds()
public Rectangle getBoundingBox()
getBounds().public boolean contains(Point p)
p
- the point to be tested
public boolean contains(int x,
int y)
(The contains method is based on code by
Hanpeter van Vliet [hvvliet@inter.nl.net].)
x
- the x coordinate of the point to be tested.
y
- the y coordinate of the point to be tested.true if the point (x, y)
is contained by this polygon;
false otherwise.
public boolean inside(int x,
int y)
contains(int, int).public Rectangle2D getBounds2D()
public boolean contains(double x,
double y)
public boolean contains(Point2D p)
public boolean intersects(double x,
double y,
double w,
double h)
public boolean intersects(Rectangle2D r)
public boolean contains(double x,
double y,
double w,
double h)
public boolean contains(Rectangle2D r)
public PathIterator getPathIterator(AffineTransform at)
at
- an optional AffineTransform to be applied to the
coordinates as they are returned in the iteration, or null
if the untransformed coordinates are desired.
public PathIterator getPathIterator(AffineTransform at,
double flatness)
flatness parameter which specifies ?REMIND?.
An optional affine transform can be specified in which case
the coordinates returned in the iteration will be transformed
accordingly.
at
- an optional AffineTransform to be applied to the
coordinates as they are returned in the iteration, or null
if the untransformed coordinates are desired.
flatness
- the maximum amount that the control points
for a given curve can vary from colinear before a subdivided
curve is replaced by a straight line connecting the endpoints.
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Java Platform 1.2 Beta 4 |
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