ProGAL.geom2d

Class Triangle

java.lang.Object

ProGAL.geom2d.Triangle

All Implemented Interfaces:

Shape

Direct Known Subclasses:

Triangle

public class Triangle
extends java.lang.Object
implements Shape

Field Summary

Fields

Modifier and Type	Field and Description
protected Point[]	points

Constructor Summary

Constructors

Constructor and Description
Triangle(Point p1, Point p2, Point p3)

Method Summary

Modifier and Type	Method and Description
static double	calculateArea(double a, double b, double c) Calculate the area from the three side-lengths of a triangle
static double	calculateHeight(double a, double b, double c) Calculate the height from the the endpoint of a and b down to the c-edge based on the lengths of the edges.
boolean	contains(Point p)
double	getAltitude(int i)
Point	getCenter() Get the geometric center of the shape.
Circle	getCircumCircle()
Point	getCorner(int i)
double	getCos(int i) returns the cosinus of the angle opposite to the vertex with vertex i
Point	getSteinerPoint()
boolean	inCircumCircle(Point s)
static void	main(java.lang.String[] args)
void	setCorner(Point p, int i)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

points

protected final Point[] points

Constructor Detail

Triangle

public Triangle(Point p1,
                Point p2,
                Point p3)

Method Detail

getCorner

public Point getCorner(int i)

setCorner

public void setCorner(Point p,
                      int i)

getAltitude

public double getAltitude(int i)

calculateArea

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

Calculate the area from the three side-lengths of a triangle

calculateHeight

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

Calculate the height from the the endpoint of a and b down to the c-edge based on the lengths of the edges.

getCenter

public Point getCenter()

Description copied from interface: Shape

Get the geometric center of the shape. The center of a shape can be interpreted in many ways (center of mass, circumcenter, inscribed center etc.). No strict requirement is given here, but typically the circumcenter should be supplied. This method is most prominently used to find the average center-position of a collection of shapes such that scene-viewers can be centered on the scene.

Specified by:

getCenter in interface Shape

getCos

public double getCos(int i)

returns the cosinus of the angle opposite to the vertex with vertex i

getCircumCircle

public Circle getCircumCircle()

getSteinerPoint

public Point getSteinerPoint()

inCircumCircle

public boolean inCircumCircle(Point s)

main

public static void main(java.lang.String[] args)

contains

public boolean contains(Point p)

Specified by:

contains in interface Shape

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object