org.jscience.architecture.traffic.util
Class CurveUtils

java.lang.Object
  org.jscience.architecture.traffic.util.CurveUtils

public class CurveUtils
extends java.lang.Object

This class presents methods to handle curves

Constructor Summary

CurveUtils()

Method Summary

static java.awt.Point	calcIntersect(java.awt.Point p1, java.awt.Point p2, double ar1, double ar2) Calculate the intersection coordinats for two lines, given a base point and angle for each line.
static double	calcLength(TurnCurve c, int step) Calculates the length of the specified curve in steps of size step
static int	calcPathSteps(TurnCurve c) Returns the number of steps used to traverse the specified curve
static TurnCurve	createCurve(java.awt.Point p1, java.awt.Point p2, double a1, double a2)
static java.awt.geom.GeneralPath	createPath(TurnCurve c1, TurnCurve c2) Creates a QCurve given two points and angles
static double	getAngle(TurnCurve c, int index, int step) Returns the angle of a given curve at the given index
static double	getCurrentAngle(TurnCurve c, java.awt.Point p)
static java.awt.Point	getPoint(TurnCurve c, int index, int step) Returns the coordinates of the point with specified index and stepsize on a given curve
static int	getRoadLength(Road road, int step) Returns the length of a given Road.
static double	normalize(double a) Convert any angle to a value in the range [0, 2Pi]
static void	setupRoadSizes(Road road, int step)

Methods inherited from class java.lang.Object

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

Constructor Detail

CurveUtils

public CurveUtils()

Method Detail

calcIntersect

public static java.awt.Point calcIntersect(java.awt.Point p1,
                                           java.awt.Point p2,
                                           double ar1,
                                           double ar2)
                                    throws CurveException

Calculate the intersection coordinats for two lines, given a base point and angle for each line.

Parameters:

p1 - The base point for the first line

p2 - The base point for the second line

ar1 - The angle of the first line in radians

ar2 - The angle of the second line in radians

Throws:

CurveException

createCurve

public static TurnCurve createCurve(java.awt.Point p1,
                                    java.awt.Point p2,
                                    double a1,
                                    double a2)
                             throws CurveException

Throws:

CurveException

createPath

public static java.awt.geom.GeneralPath createPath(TurnCurve c1,
                                                   TurnCurve c2)

Creates a QCurve given two points and angles

Parameters:

p1 - The coordinats of the first point

p2 - The coordinats of the second point

a1 - The angle of the first point in radians

a2 - The angle of the second point

public static QCurve createCurve(Point p1, Point p2, double a1, double a2) throws CurveException { Point tp = new Point((int)(p1.x + p1.distance(p2) * Math.cos(a1)),(int)(p1.y - p1.distance(p2) * Math.sin(a1))); Rectangle r = new Rectangle(p2.x - 10, p2.y - 10, 20, 20); Point ip; if(r.contains(tp)) return new QCurve(p1,p2); ip = calcIntersect(p1,p2,a1,a2); QCurve c = new QCurve(p1,ip,p2); // test voor path-iterator-bug: Point2D.Double p = c.next(c.getFirst(),2); if(!(c.getBounds().contains(p))) { c = new QCurve(p2,ip,p1); p = c.next(c.getFirst(),2); c.setSwitched(true); } return c; }

/** Creates a GeneralPath connecting both curves in a Drivelane-like fashion

c1 - The first curve

c2 - The second curve

Returns:

A GeneralPath connecting both curves

calcLength

public static double calcLength(TurnCurve c,
                                int step)

Calculates the length of the specified curve in steps of size step

Parameters:

c - The QCurve whose length to calculate

step - The stepsize

Returns:

The length of the specified QCurve

calcPathSteps

public static int calcPathSteps(TurnCurve c)

Returns the number of steps used to traverse the specified curve

Parameters:

c - The QCurve

Returns:

The number of steps

getPoint

public static java.awt.Point getPoint(TurnCurve c,
                                      int index,
                                      int step)

Returns the coordinates of the point with specified index and stepsize on a given curve

Parameters:

c - The curve

step - The stepsize

index - The index of the point

Returns:

The Point at the specified index

getAngle

public static double getAngle(TurnCurve c,
                              int index,
                              int step)

Returns the angle of a given curve at the given index

Parameters:

c - The curve

step - The stepsize

index - The index

Returns:

The angle of the curve at the specified index

getCurrentAngle

public static double getCurrentAngle(TurnCurve c,
                                     java.awt.Point p)

normalize

public static double normalize(double a)

Convert any angle to a value in the range [0, 2Pi]

setupRoadSizes

public static void setupRoadSizes(Road road,
                                  int step)
                           throws InfraException

Throws:

InfraException

getRoadLength

public static int getRoadLength(Road road,
                                int step)
                         throws InfraException

Returns the length of a given Road.

Parameters:

road - A Road

step - The step-size in pixels

Throws:

InfraException