java.awt.geom
Class Arc2D

java.lang.Object
  |
  +--java.awt.geom.RectangularShape
        |
        +--java.awt.geom.Arc2D

All Implemented Interfaces:

Cloneable, Shape

Direct Known Subclasses:

Arc2D.Double, Arc2D.Float

public abstract class Arc2D

extends RectangularShape

Arc2D is the abstract superclass for all objects that store a 2D arc defined by a bounding rectangle, start angle, angular extent (length of the arc), and a closure type (OPEN, CHORD, or PIE).

The bounding rectangle defines the outer boundary of the full ellipse of which this arc is a partial section. The angles are specified relative to the non-square extents of the bounding rectangle such that 45 degrees always falls on the line from the center of the ellipse to the upper right corner of the bounding rectangle. As a result, if the bounding rectangle is noticeably longer along one axis than the other, the angles to the start and end of the arc segment will be skewed farther along the longer axis of the bounds.

The actual storage representation of the coordinates is left to the subclass.

Nested Class Summary
static class	Arc2D.Double     This class defines an arc specified in double precision.
static class	Arc2D.Float     This class defines an arc specified in float precision.

 

Field Summary
static int	CHORD     The closure type for an arc closed by drawing a straight line segment from the start of the arc segment to the end of the arc segment.
static int	OPEN     The closure type for an open arc with no path segments connecting the two ends of the arc segment.
static int	PIE     The closure type for an arc closed by drawing straight line segments from the start of the arc segment to the center of the full ellipse and from that point to the end of the arc segment.

 

Constructor Summary
protected	Arc2D(int type)     This is an abstract class that cannot be instantiated directly.

 

Method Summary
boolean	contains(double x, double y)     Determines whether or not the specified point is inside the boundary of the arc.
boolean	contains(double x, double y, double w, double h)     Determine whether or not the interior of the arc entirely contains the specified rectangle.
boolean	contains(Rectangle2D r)     Determine whether or not the interior of the arc entirely contains the specified rectangle.
boolean	containsAngle(double angle)     Determines whether or not the specified angle is within the angular extents of the arc.
abstract  double	getAngleExtent()     Returns the angular extent of the arc.
abstract  double	getAngleStart()     Returns the starting angle of the arc.
int	getArcType()     Returns the arc closure type of the arc: OPEN, CHORD, or PIE.
Rectangle2D	getBounds2D()     Returns the high-precision bounding box of the arc.
Point2D	getEndPoint()     Returns the ending point of the arc.
PathIterator	getPathIterator(AffineTransform at)     Returns an iteration object that defines the boundary of the arc.
Point2D	getStartPoint()     Returns the starting point of the arc.
boolean	intersects(double x, double y, double w, double h)     Determines whether or not the interior of the arc intersects the interior of the specified rectangle.
protected abstract  Rectangle2D	makeBounds(double x, double y, double w, double h)     Constructs a Rectangle2D of the appropriate precision to hold the parameters calculated to be the bounding box of this arc.
abstract  void	setAngleExtent(double angExt)     Sets the angular extent of this arc to the specified double value.
void	setAngles(double x1, double y1, double x2, double y2)     Sets the starting angle and angular extent of this arc using two sets of coordinates.
void	setAngles(Point2D p1, Point2D p2)     Sets the starting angle and angular extent of this arc using two points.
abstract  void	setAngleStart(double angSt)     Sets the starting angle of this arc to the specified double value.
void	setAngleStart(Point2D p)     Sets the starting angle of this arc to the angle that the specified point defines relative to the center of this arc.
void	setArc(Arc2D a)     Sets this arc to be the same as the specified arc.
abstract  void	setArc(double x, double y, double w, double h, double angSt, double angExt, int closure)     Sets the location, size, angular extents, and closure type of this arc to the specified double values.
void	setArc(Point2D loc, Dimension2D size, double angSt, double angExt, int closure)     Sets the location, size, angular extents, and closure type of this arc to the specified values.
void	setArc(Rectangle2D rect, double angSt, double angExt, int closure)     Sets the location, size, angular extents, and closure type of this arc to the specified values.
void	setArcByCenter(double x, double y, double radius, double angSt, double angExt, int closure)     Sets the position, bounds, angular extents, and closure type of this arc to the specified values.
void	setArcByTangent(Point2D p1, Point2D p2, Point2D p3, double radius)     Sets the position, bounds, and angular extents of this arc to the specified value.
void	setArcType(int type)     Sets the closure type of this arc to the specified val