pythagoras.d

Class Lines

java.lang.Object

pythagoras.d.Lines

public class Lines
extends Object

Line-related utility methods.

Constructor Summary

Constructors

Constructor and Description
Lines()

Method Summary

Modifier and Type	Method and Description
static boolean	lineIntersectsRect(double x1, double y1, double x2, double y2, double rx, double ry, double rw, double rh) Returns true if the specified line segment intersects the specified rectangle.
static boolean	linesIntersect(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4) Returns true if the specified two line segments intersect.
static double	pointLineDist(double px, double py, double x1, double y1, double x2, double y2) Returns the distance from the specified point to the specified line.
static double	pointLineDistSq(double px, double py, double x1, double y1, double x2, double y2) Returns the square of the distance from the specified point to the specified line.
static double	pointSegDist(double px, double py, double x1, double y1, double x2, double y2) Returns the distance between the specified point and the specified line segment.
static double	pointSegDistSq(double px, double py, double x1, double y1, double x2, double y2) Returns the square of the distance between the specified point and the specified line segment.
static int	relativeCCW(double px, double py, double x1, double y1, double x2, double y2) Returns an indicator of where the specified point (px,py) lies with respect to the line segment from (x1,y1) to (x2,y2).

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Lines

public Lines()

Method Detail

linesIntersect

public static boolean linesIntersect(double x1,
                                     double y1,
                                     double x2,
                                     double y2,
                                     double x3,
                                     double y3,
                                     double x4,
                                     double y4)

Returns true if the specified two line segments intersect.

lineIntersectsRect

public static boolean lineIntersectsRect(double x1,
                                         double y1,
                                         double x2,
                                         double y2,
                                         double rx,
                                         double ry,
                                         double rw,
                                         double rh)

Returns true if the specified line segment intersects the specified rectangle.

pointLineDistSq

public static double pointLineDistSq(double px,
                                     double py,
                                     double x1,
                                     double y1,
                                     double x2,
                                     double y2)

Returns the square of the distance from the specified point to the specified line.

pointLineDist

public static double pointLineDist(double px,
                                   double py,
                                   double x1,
                                   double y1,
                                   double x2,
                                   double y2)

Returns the distance from the specified point to the specified line.

pointSegDistSq

public static double pointSegDistSq(double px,
                                    double py,
                                    double x1,
                                    double y1,
                                    double x2,
                                    double y2)

Returns the square of the distance between the specified point and the specified line segment.

pointSegDist

public static double pointSegDist(double px,
                                  double py,
                                  double x1,
                                  double y1,
                                  double x2,
                                  double y2)

Returns the distance between the specified point and the specified line segment.

relativeCCW

public static int relativeCCW(double px,
                              double py,
                              double x1,
                              double y1,
                              double x2,
                              double y2)

Returns an indicator of where the specified point (px,py) lies with respect to the line segment from (x1,y1) to (x2,y2). See http://download.oracle.com/javase/6/docs/api/java/awt/geom/Line2D.html