org.gvsig.euclidean

Interface EuclideanManager

All Known Implementing Classes:

DefaultEuclideanManager

public interface EuclideanManager

Method Summary

Modifier and Type	Method and Description
boolean	areThreePointsInLine(double ax, double ay, double bx, double by, double cx, double cy)
double	calculateAngle(double vertexx, double vertexy, double px, double py) Find the angle in the counterclockwise direction between the horizontal line and point p relative to the vertex
double	calculateAngle(double vertexx, double vertexy, double p1x, double p1y, double p2x, double p2y) Calculate the angle between points p1 and p2 with vertex at vertex point
EuclideanLine2D	createLine2D(double m, double b)
EuclideanLine2D	createLine2D(double coefA, double coefB, double coefC)
EuclideanLine2D	createLine2D(double x0, double y0, double x1, double y1)
EuclideanLine2D	createLine2D(double m, java.awt.geom.Point2D p)
EuclideanLine2D	createLine2D(java.awt.geom.Point2D p1, java.awt.geom.Point2D p2)
double	distance(double x1, double y1, double x2, double y2) Gets the distance between two points
double	distance(java.awt.geom.Point2D a, java.awt.geom.Point2D b) Gets the distance between two points
java.awt.geom.Point2D	getCenter(double ax, double ay, double bx, double by, double cx, double cy) Gets center point of three points.
java.awt.geom.Point2D	getCenter(java.awt.geom.Point2D a, java.awt.geom.Point2D b, java.awt.geom.Point2D c) Gets center point of three points.
double	getCoefDirection(double centerx, double centery, double point1x, double point1y, double point2x, double point2y) Returns the coefficient that expresses the direction in which the angle with vertex at center a and from point1 to point2 is beaten coefDirection >= 0 then the direction is CCW else the direction is CW
double	getCoefDirection(java.awt.geom.Point2D center, java.awt.geom.Point2D point1, java.awt.geom.Point2D point2) Returns the coefficient that expresses the direction in which the angle with vertex at center a and from point1 to point2 is beaten coefDirection >= 0 then the direction is CCW else the direction is CW
java.awt.geom.Point2D	getMidPoint(double ax, double ay, double bx, double by) Gets midpoint of two points
java.awt.geom.Point2D	getMidPoint(java.awt.geom.Point2D a, java.awt.geom.Point2D b) Gets midpoint of two points
java.awt.geom.Point2D	getPointAtDistance(double x1, double y1, double distance, double angle, java.lang.String unit)
double	getYIntercept(double m, double x, double y)
double	getYIntercept(double m, java.awt.geom.Point2D p)

Method Detail

createLine2D

EuclideanLine2D createLine2D(double coefA,
                             double coefB,
                             double coefC)

createLine2D

EuclideanLine2D createLine2D(double m,
                             double b)

createLine2D

EuclideanLine2D createLine2D(double m,
                             java.awt.geom.Point2D p)

getYIntercept

double getYIntercept(double m,
                     java.awt.geom.Point2D p)

getYIntercept

double getYIntercept(double m,
                     double x,
                     double y)

createLine2D

EuclideanLine2D createLine2D(double x0,
                             double y0,
                             double x1,
                             double y1)

createLine2D

EuclideanLine2D createLine2D(java.awt.geom.Point2D p1,
                             java.awt.geom.Point2D p2)

distance

double distance(java.awt.geom.Point2D a,
                java.awt.geom.Point2D b)

Gets the distance between two points

Parameters:

a - Point one

b - Point two

Returns:

distance

double distance(double x1,
                double y1,
                double x2,
                double y2)

Gets the distance between two points

Parameters:

x1 - x of point one

y1 - y of point one

x2 - x of point two

y2 - y of point two

Returns:

getCenter

java.awt.geom.Point2D getCenter(double ax,
                                double ay,
                                double bx,
                                double by,
                                double cx,
                                double cy)

Gets center point of three points.

Parameters:

ax - x of point one

ay - y of point one

bx - x of point two

by - y of point two

cx - x of point three

cy - y of point three

Returns:

Point center.

getCenter

java.awt.geom.Point2D getCenter(java.awt.geom.Point2D a,
                                java.awt.geom.Point2D b,
                                java.awt.geom.Point2D c)

Gets center point of three points.

Parameters:

a - Point one

b - Point two

c - Point three

Returns:

Point center.

getMidPoint

java.awt.geom.Point2D getMidPoint(java.awt.geom.Point2D a,
                                  java.awt.geom.Point2D b)

Gets midpoint of two points

Parameters:

a - Point one

b - Point two

Returns:

Mid point of points.

getMidPoint

java.awt.geom.Point2D getMidPoint(double ax,
                                  double ay,
                                  double bx,
                                  double by)

Gets midpoint of two points

Parameters:

ax - x of point one

ay - y of point one

bx - x of point two

by - y of point two

Returns:

Mid point of points.

getCoefDirection

double getCoefDirection(double centerx,
                        double centery,
                        double point1x,
                        double point1y,
                        double point2x,
                        double point2y)

Returns the coefficient that expresses the direction in which the angle with vertex at center a and from point1 to point2 is beaten coefDirection >= 0 then the direction is CCW else the direction is CW

Parameters:

centerx -

centery -

point1x -

point1y -

point2x -

point2y -

Returns:

getCoefDirection

double getCoefDirection(java.awt.geom.Point2D center,
                        java.awt.geom.Point2D point1,
                        java.awt.geom.Point2D point2)

Returns the coefficient that expresses the direction in which the angle with vertex at center a and from point1 to point2 is beaten coefDirection >= 0 then the direction is CCW else the direction is CW

Parameters:

center -

point1 -

point2 -

Returns:

calculateAngle

double calculateAngle(double vertexx,
                      double vertexy,
                      double p1x,
                      double p1y,
                      double p2x,
                      double p2y)

Calculate the angle between points p1 and p2 with vertex at vertex point

Parameters:

vertexx -

vertexy -

p1y -

p1x -

p2x -

p2y -

Returns:

calculateAngle

double calculateAngle(double vertexx,
                      double vertexy,
                      double px,
                      double py)

Find the angle in the counterclockwise direction between the horizontal line and point p relative to the vertex

Parameters:

vertexx -

vertexy -

px -

py -

Returns:

areThreePointsInLine

boolean areThreePointsInLine(double ax,
                             double ay,
                             double bx,
                             double by,
                             double cx,
                             double cy)

getPointAtDistance

java.awt.geom.Point2D getPointAtDistance(double x1,
                                         double y1,
                                         double distance,
                                         double angle,
                                         java.lang.String unit)