graph.math

Class Calc

java.lang.Object

graph.math.Calc

public class Calc
extends java.lang.Object

Class containing basic math calculations needed for implementation of various drawing algorithms

Author:

Renata

Constructor Summary

Constructors

Constructor and Description
Calc()

Method Summary

Modifier and Type	Method and Description
static double[]	angleBetweenTwoLines(Line l1, Line l2) Finds angle between the two given lines
static double	distanceBetweenTwoPoints(java.awt.geom.Point2D p1, java.awt.geom.Point2D p2) Finds distance between the two provided points
static java.awt.geom.Point2D	intersectionOfLines(Line l1, Line l2) Finds a point where the two given lines intersect
static Line	lineThroughTwoPoints(java.awt.geom.Point2D p1, java.awt.geom.Point2D p2) Finds a line which goes through provided two points
static Line	parallelLineThroughPoint(Line line1, java.awt.geom.Point2D point) Finds a line parallel to the given line containing the given point
static Line	perpendicularLineIntersectingOnPoint(Line l1, java.awt.geom.Point2D p) Finds a line which is perpendicular to the the given line and contains it point p
static java.awt.geom.Point2D	symmetricPoint(java.awt.geom.Point2D p1, Line line) Finds a point symmetric to the given point with the axis being the provided line
static double	triangleAngle(double a, double b, double c) Finds an angle of the triangle in its apex c, given lengths of its sides
static java.awt.geom.Point2D	triangleCentroid(java.awt.geom.Point2D a, java.awt.geom.Point2D b, java.awt.geom.Point2D c) Finds centroid of the given triangle, given positions of its apices
static java.awt.geom.Point2D	triangleCentroid(Triangle t) Finds centroid of the triangle, given the whole triangle object

Methods inherited from class java.lang.Object

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

Constructor Detail

Calc

public Calc()

Method Detail

lineThroughTwoPoints

public static Line lineThroughTwoPoints(java.awt.geom.Point2D p1,
                                        java.awt.geom.Point2D p2)

Finds a line which goes through provided two points

Parameters:

p1 - The first point

p2 - The second Point

Returns:

Line going to p1 and p2

perpendicularLineIntersectingOnPoint

public static Line perpendicularLineIntersectingOnPoint(Line l1,
                                                        java.awt.geom.Point2D p)

Finds a line which is perpendicular to the the given line and contains it point p

Parameters:

l1 - Line

p - Point where the lines intersect

Returns:

Perpendicular line to l1 containing p

intersectionOfLines

public static java.awt.geom.Point2D intersectionOfLines(Line l1,
                                                        Line l2)

Finds a point where the two given lines intersect

Parameters:

l1 - The first line

l2 - The second line

Returns:

Point where l1 and l2 intersect

angleBetweenTwoLines

public static double[] angleBetweenTwoLines(Line l1,
                                            Line l2)

Finds angle between the two given lines

Parameters:

l1 - The first line

l2 - The second line

Returns:

Angle between l1 and l2

distanceBetweenTwoPoints

public static double distanceBetweenTwoPoints(java.awt.geom.Point2D p1,
                                              java.awt.geom.Point2D p2)

Finds distance between the two provided points

Parameters:

p1 - The first point

p2 - The second point

Returns:

Distance between p1 and p2

triangleAngle

public static double triangleAngle(double a,
                                   double b,
                                   double c)

Finds an angle of the triangle in its apex c, given lengths of its sides

Parameters:

a - Length of triangle's side a

b - Length of triangle's side b

c - Length of triangle's side v

Returns:

Angle of the triangle in its apex c

triangleCentroid

public static java.awt.geom.Point2D triangleCentroid(java.awt.geom.Point2D a,
                                                     java.awt.geom.Point2D b,
                                                     java.awt.geom.Point2D c)

Finds centroid of the given triangle, given positions of its apices

Parameters:

a - The first triangle apex

b - The second triangle apex

c - Third triangle apex

Returns:

Centroid of the triangle

triangleCentroid

public static java.awt.geom.Point2D triangleCentroid(Triangle t)

Finds centroid of the triangle, given the whole triangle object

Parameters:

t - Triangle

Returns:

Centroid of t

parallelLineThroughPoint

public static Line parallelLineThroughPoint(Line line1,
                                            java.awt.geom.Point2D point)

Finds a line parallel to the given line containing the given point

Parameters:

line1 - Line to which the new line should be parallel

point - Point the parallel line should contain

Returns:

Line parallel to line1 containing point

symmetricPoint

public static java.awt.geom.Point2D symmetricPoint(java.awt.geom.Point2D p1,
                                                   Line line)

Finds a point symmetric to the given point with the axis being the provided line

Parameters:

p1 - Point to which the resulting one should be symmetric

line - Line serving as an axis of the symmetry

Returns:

Point symmetric to p1 with the axis being line