fr.ign.cogit.geoxygene.util.math

Class VectorUtil

Object

VectorUtil

public final class VectorUtil
extends Object

Author:

JeT Utility class dealing with vectors

Method Summary

Modifier and Type	Method and Description
static Point2D	addPoint2D(Point2D p1, Point2D p2)
static Point2d	addPoint2d(Point2d result, Point2d p1, Point2d p2)
static Point2d	copy(Point2d result, Point2d v)
static double	distance(Point2d p1, Point2d p2)
static double	distance(Point2D p1, Point2D p2)
static double	dot(Point2d a, Point2d b)
static double	dot(Point2D a, Point2D b)
static Point2d	interpolate(Point2d result, Point2d p0, Point2d p1, double alpha)
static double	length(Point2d p)
static double	length(Point2D p)
static double	lineIntersection(Point2d p0, Point2d e0, Point2d p1, Point2d e1) Compute the intersection between two vectorial lines
static Point2D	lineIntersection(Point2D p0, Point2D e0, Point2D p1, Point2D e1)
static Point2d	lineIntersection(Point2d result, Point2d p0, Point2d e0, Point2d p1, Point2d e1) Compute the intersection between two vectorial lines
static Point2D	mulDoublePoint2D(double d, Point2D p)
static Point2d	mulDoublePoint2d(Point2d result, double d, Point2d p)
static Point2D	mulPoint2D(Point2D p1, Point2D p2)
static Point2d	mulPoint2d(Point2d result, Point2d p1, Point2d p2)
static Point2D	normalize(Point2D p)
static Point2d	normalize(Point2d result, Point2d v)
static Point2d	normalizedVector(Point2d result, Point2d p1, Point2d p2)
static Point2D	opposite(Point2D p)
static Point2d	opposite(Point2d result, Point2d p)
static Point2D	rotatePoint2D(Point2D center, Point2D p, double angle)
static Point2d	rotatePoint2d(Point2d result, Point2d center, Point2d p, double angle)
static Point2D	rotateVector(Point2D v, double angle)
static Point2d	rotateVector(Point2d result, Point2d v, double angle)
static Point2d	segmentIntersection(Point2d result, Point2d start0, Point2d end0, Point2d start1, Point2d end1) Compute the intersection between two vectorial lines
static Point2d	subPoint2d(Point2d result, Point2d p1, Point2d p2)
static Point2D	vector(Point2D p1, Point2D p2)
static Point2d	vector(Point2d result, Point2d p1, Point2d p2)

Methods inherited from class Object

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

Method Detail

length

public static double length(Point2D p)

distance

public static double distance(Point2D p1,
                              Point2D p2)

mulDoublePoint2D

public static Point2D mulDoublePoint2D(double d,
                                       Point2D p)

opposite

public static Point2D opposite(Point2D p)

mulPoint2D

public static Point2D mulPoint2D(Point2D p1,
                                 Point2D p2)

addPoint2D

public static Point2D addPoint2D(Point2D p1,
                                 Point2D p2)

rotatePoint2D

public static Point2D rotatePoint2D(Point2D center,
                                    Point2D p,
                                    double angle)

rotateVector

public static Point2D rotateVector(Point2D v,
                                   double angle)

vector

public static Point2D vector(Point2D p1,
                             Point2D p2)

dot

public static double dot(Point2D a,
                         Point2D b)

normalize

public static Point2D normalize(Point2D p)

lineIntersection

public static Point2D lineIntersection(Point2D p0,
                                       Point2D e0,
                                       Point2D p1,
                                       Point2D e1)

length

public static double length(Point2d p)

distance

public static double distance(Point2d p1,
                              Point2d p2)

mulDoublePoint2d

public static Point2d mulDoublePoint2d(Point2d result,
                                       double d,
                                       Point2d p)

opposite

public static Point2d opposite(Point2d result,
                               Point2d p)

mulPoint2d

public static Point2d mulPoint2d(Point2d result,
                                 Point2d p1,
                                 Point2d p2)

addPoint2d

public static Point2d addPoint2d(Point2d result,
                                 Point2d p1,
                                 Point2d p2)

subPoint2d

public static Point2d subPoint2d(Point2d result,
                                 Point2d p1,
                                 Point2d p2)

rotatePoint2d

public static Point2d rotatePoint2d(Point2d result,
                                    Point2d center,
                                    Point2d p,
                                    double angle)

rotateVector

public static Point2d rotateVector(Point2d result,
                                   Point2d v,
                                   double angle)

vector

public static Point2d vector(Point2d result,
                             Point2d p1,
                             Point2d p2)

normalizedVector

public static Point2d normalizedVector(Point2d result,
                                       Point2d p1,
                                       Point2d p2)

dot

public static double dot(Point2d a,
                         Point2d b)

copy

public static Point2d copy(Point2d result,
                           Point2d v)

normalize

public static Point2d normalize(Point2d result,
                                Point2d v)

lineIntersection

public static Point2d lineIntersection(Point2d result,
                                       Point2d p0,
                                       Point2d e0,
                                       Point2d p1,
                                       Point2d e1)

Compute the intersection between two vectorial lines

Parameters:

result -

p0 - line1 point

e0 - line1 direction

p1 - line2 point

e1 - line2 direction

Returns:

lineIntersection

public static double lineIntersection(Point2d p0,
                                      Point2d e0,
                                      Point2d p1,
                                      Point2d e1)

Compute the intersection between two vectorial lines

Parameters:

result -

p0 - line1 point

e0 - line1 direction

p1 - line2 point

e1 - line2 direction

Returns:

the intersection parameter value (between 0 & 1 if segments intersects). POSITIVE_INFINITY if parallel

segmentIntersection

public static Point2d segmentIntersection(Point2d result,
                                          Point2d start0,
                                          Point2d end0,
                                          Point2d start1,
                                          Point2d end1)

Compute the intersection between two vectorial lines

Parameters:

result -

p0 - line1 point

e0 - line1 direction

p1 - line2 point

e1 - line2 direction

Returns:

false if segments do not intersect. true if they do (result is filled)

interpolate

public static Point2d interpolate(Point2d result,
                                  Point2d p0,
                                  Point2d p1,
                                  double alpha)