math.geom2d.line
Class Ray2D

java.lang.Object
  math.geom2d.line.StraightObject2D
      math.geom2d.line.LineArc2D
          math.geom2d.line.Ray2D

All Implemented Interfaces:

java.awt.Shape, ContinuousCurve2D, ContinuousOrientedCurve2D, Curve2D, OrientedCurve2D, SmoothCurve2D, SmoothOrientedCurve2D, Shape2D

public class Ray2D
extends LineArc2D

Ray, or half-line, defined from an origin and a direction vector. It is composed of all points satisfying the parametric equation:

x(t) = x0+t*dx
y(t) = y0+t*dy

With t comprised between 0 and +INFINITY.

Field Summary

Fields inherited from class math.geom2d.line.LineArc2D

t0, t1

Fields inherited from class math.geom2d.line.StraightObject2D

dx, dy, x0, y0

Fields inherited from interface math.geom2d.curve.ContinuousCurve2D

CIRCLE, CLOSED_EDGE, LOOP, OPEN_EDGE

Fields inherited from interface math.geom2d.Shape2D

ACCURACY, defaultClipWindow, EMPTY_SET

Constructor Summary

Ray2D()
Empty constructor for Ray2D.

Ray2D(double x, double y, double angle)
Creates a new Ray2D, originating from point (x, y)<\code>, and going in the direction specified by angle<\code> (in radians).

Ray2D(double x1, double y1, double dx, double dy)
Creates a new Ray2D, originating from point (x1,y1)<\code>, and going in the direction defined by vector (dx, dy)<\code>.

Ray2D(Point2D point, double angle)
Creates a new Ray2D, originating from point point<\code>, and going in the direction specified by angle<\code> (in radians).

Ray2D(Point2D point, double dx, double dy)
Creates a new Ray2D, originating from point point<\code>, and going in the direction defined by vector (dx,dy)<\code>.

Ray2D(Point2D point1, Point2D point2)
Creates a new Ray2D, originating from point1<\code>, and going in the direction of point2<\code>.

Ray2D(Point2D point, Vector2D vector)
Creates a new Ray2D, originating from point point<\code>, and going in the direction specified by vector<\code>.

Ray2D(StraightObject2D line)
Define a new Ray, with same characteristics as given object.

Method Summary

boolean	isBounded() Always returns false, because a ray is not bounded.
void	setRay(double x0, double y0, double dx, double dy)
void	setRay(Point2D p1, Point2D p2)
void	setRay(Point2D point, Vector2D vect)
LineArc2D	transform(AffineTransform2D trans) Transforms the curve by an affine transform.

Methods inherited from class math.geom2d.line.LineArc2D

appendPath, clip, contains, contains, equals, equals, getAsPolyline, getBoundingBox, getBounds, getBounds2D, getContinuousCurves, getCurvature, getDistance, getDistance, getFirstPoint, getInnerPath, getLastPoint, getLength, getPathIterator, getPathIterator, getPoint, getPoint, getPoint1, getPoint2, getPosition, getReverseCurve, getSmoothPieces, getSubCurve, getT0, getT1, getTangent, getWindingAngle, getX1, getX2, getY1, getY2, intersects, intersects, isInside, project, toString

Methods inherited from class math.geom2d.line.StraightObject2D

contains, contains, getCartesianEquation, getDistance, getHorizontalAngle, getIntersection, getIntersection, getIntersections, getOrigin, getParallel, getParametric, getPerpendicular, getPolarCoefficients, getPositionOnLine, getPositionOnLine, getProjectedPoint, getProjectedPoint, getSignedDistance, getSignedDistance, getSignedPolarCoefficients, getSupportLine, getSymmetric, getSymmetric, getVector, isClosed, isColinear, isColinear, isInside, isParallel, isParallel

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface math.geom2d.curve.ContinuousCurve2D

isClosed

Methods inherited from interface math.geom2d.curve.OrientedCurve2D

getSignedDistance, getSignedDistance

Methods inherited from interface math.geom2d.curve.Curve2D

getIntersections

Methods inherited from interface java.awt.Shape

contains, contains

Constructor Detail

Ray2D

public Ray2D()

Empty constructor for Ray2D. Default is ray starting at origin, and having a slope of 1*dx and 0*dy.

Ray2D

public Ray2D(Point2D point1,
             Point2D point2)

Creates a new Ray2D, originating from point1<\code>, and going in the direction of point2<\code>.

Ray2D

public Ray2D(double x1,
             double y1,
             double dx,
             double dy)

Creates a new Ray2D, originating from point (x1,y1)<\code>, and going in the direction defined by vector (dx, dy)<\code>.

Ray2D

public Ray2D(Point2D point,
             double dx,
             double dy)

Creates a new Ray2D, originating from point point<\code>, and going in the direction defined by vector (dx,dy)<\code>.

Ray2D

public Ray2D(Point2D point,
             Vector2D vector)

Creates a new Ray2D, originating from point point<\code>, and going in the direction specified by vector<\code>.

Ray2D

public Ray2D(Point2D point,
             double angle)

Creates a new Ray2D, originating from point point<\code>, and going in the direction specified by angle<\code> (in radians).

Ray2D

public Ray2D(double x,
             double y,
             double angle)

Creates a new Ray2D, originating from point (x, y)<\code>, and going in the direction specified by angle<\code> (in radians).

Ray2D

public Ray2D(StraightObject2D line)

Define a new Ray, with same characteristics as given object.

Method Detail

setRay

public void setRay(double x0,
                   double y0,
                   double dx,
                   double dy)

setRay

public void setRay(Point2D p1,
                   Point2D p2)

setRay

public void setRay(Point2D point,
                   Vector2D vect)

isBounded

public boolean isBounded()

Always returns false, because a ray is not bounded.

Specified by:

isBounded in interface Shape2D

Overrides:

isBounded in class LineArc2D

transform

public LineArc2D transform(AffineTransform2D trans)

Description copied from interface: Curve2D

Transforms the curve by an affine transform. The result is an instance of Curve2D.

Specified by:

transform in interface ContinuousCurve2D

Specified by:

transform in interface ContinuousOrientedCurve2D

Specified by:

transform in interface Curve2D

Specified by:

transform in interface OrientedCurve2D

Specified by:

transform in interface SmoothCurve2D

Specified by:

transform in interface SmoothOrientedCurve2D

Specified by:

transform in interface Shape2D

Overrides:

transform in class LineArc2D

Parameters:

trans - an affine transform

Returns:

the transformed shape