Package org.web3d.util.spatial

Class Triangle

java.lang.Object

org.web3d.util.spatial.Triangle

public class Triangle
extends Object

A triangle object.

Version:

$Id: $

Author:

Alan Hudson

Field Summary

Fields

Modifier and Type	Field	Description
float[]	coords	The coordinates
int	id	The ID used for uniqueness

Constructor Summary

Constructors

Constructor	Description
Triangle(float[] coords, int id)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	calcBounds(double[] min, double[] max)	Calculate a bounding box for the triangle.
void	calcBounds(float[] min, float[] max)	Calculate a bounding box for the triangle.
int	compareTo(Object o)	Compares this object with the specified object for order.
int	compareTo(Triangle ta)	Compares this object with the specified object for order.
boolean	equals(Object o)	Compare this object for equality to the given object.
boolean	equals(Triangle ta)	Compares this object with the specified object to check for equivalence.
float	getArea()	Get the area of this triangle.
double	getLargestSide()	Get the largest side.
double	getSideRatio()	Calc the ratio between the smallest side to largest.
Triangle[]	splitTriangle(int nextID)	Split a triangle into pieces.

Methods inherited from class java.lang.Object

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

Field Details

coords

public float[] coords

The coordinates

id

public int id

The ID used for uniqueness

Constructor Details

Triangle

public Triangle(float[] coords,
 int id)

Constructor.

Parameters:

coords - The 9 coords making up the triangle

id -

Method Details

getArea

public float getArea()

Get the area of this triangle. Uses Heron's Formula

Returns:

The area

getLargestSide

public double getLargestSide()

Get the largest side.

Returns:

getSideRatio

public double getSideRatio()

Calc the ratio between the smallest side to largest.

Returns:

splitTriangle

public Triangle[] splitTriangle(int nextID)

Split a triangle into pieces. Uses the mid-point of two longest edges to create 3 triangles.

Parameters:

nextID - The next triangle ID to insure uniqueness of new id's. Increment total by 2 as first will be reused.

Returns:

equals

public boolean equals(Object o)

Compare this object for equality to the given object.

Overrides:

equals in class Object

Parameters:

o - The object to be compared

Returns:

True if these represent the same values

equals

public boolean equals(Triangle ta)

Compares this object with the specified object to check for equivalence.

Parameters:

ta - The geometry instance to be compared

Returns:

true if the objects represent identical values

compareTo

public int compareTo(Object o)
              throws ClassCastException

Compares this object with the specified object for order. Returns a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.

Parameters:

o - The object to be compared

Returns:

-1, 0 or 1 depending on order

Throws:

ClassCastException - The specified object's type prevents it from being compared to this Object

compareTo

public int compareTo(Triangle ta)

Compares this object with the specified object for order. Returns a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.

Parameters:

ta - The argument instance to be compared

Returns:

-1, 0 or 1 depending on order

calcBounds

public void calcBounds(float[] min,
 float[] max)

Calculate a bounding box for the triangle.

Parameters:

min - The array to fill in the min bounds

max - The array to fill in the max bounds

calcBounds

public void calcBounds(double[] min,
 double[] max)

Calculate a bounding box for the triangle.

Parameters:

min - The array to fill in the min bounds

max - The array to fill in the max bounds