org.jzy3d.plot3d.builder.delaunay.jdt
Class Triangle_dt

java.lang.Object
  org.jzy3d.plot3d.builder.delaunay.jdt.Triangle_dt

public class Triangle_dt
extends java.lang.Object

This class represents a 3D triangle in a Triangulation!

Field Summary

static int	_c2
static int	_counter

Constructor Summary

Triangle_dt(Point_dt A, Point_dt B)
creates a half plane using the segment (A,B).

Triangle_dt(Point_dt A, Point_dt B, Point_dt C)
constructs a triangle form 3 point - store it in counterclockwised order.

Method Summary

boolean	contains_BoundaryIsOutside(Point_dt p) determinates if this triangle contains the point p.
boolean	contains(Point_dt p) determinates if this triangle contains the point p.
boolean	fallInsideCircumcircle(Point_dt[] arrayPoints)
BoundingBox	getBoundingBox()
boolean	isCorner(Point_dt p) Checks if the given point is a corner of this triangle.
boolean	isHalfplane() returns true iff this triangle is actually a half plane.
Triangle_dt	next_12() returns the consecutive triangle which shares this triangle p1,p2 edge.
Triangle_dt	next_23() returns the consecutive triangle which shares this triangle p2,p3 edge.
Triangle_dt	next_31() returns the consecutive triangle which shares this triangle p3,p1 edge.
Point_dt	p1() returns the first vertex of this triangle.
Point_dt	p2() returns the second vertex of this triangle.
Point_dt	p3() returns the 3th vertex of this triangle.
java.lang.String	toString()
double	z_value(Point_dt q) compute the Z value for the X,Y values of q.
double	z(double x, double y) compute the Z value for the X,Y values of q.
Point_dt	z(Point_dt q) compute the Z value for the X,Y values of q.

Methods inherited from class java.lang.Object

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

Field Detail

_counter

public static int _counter

_c2

public static int _c2

Constructor Detail

Triangle_dt

public Triangle_dt(Point_dt A,
                   Point_dt B,
                   Point_dt C)

constructs a triangle form 3 point - store it in counterclockwised order.

Triangle_dt

public Triangle_dt(Point_dt A,
                   Point_dt B)

creates a half plane using the segment (A,B).

Parameters:

A -

B -

Method Detail

isHalfplane

public boolean isHalfplane()

returns true iff this triangle is actually a half plane.

p1

public Point_dt p1()

returns the first vertex of this triangle.

p2

public Point_dt p2()

returns the second vertex of this triangle.

p3

public Point_dt p3()

returns the 3th vertex of this triangle.

next_12

public Triangle_dt next_12()

returns the consecutive triangle which shares this triangle p1,p2 edge.

next_23

public Triangle_dt next_23()

returns the consecutive triangle which shares this triangle p2,p3 edge.

next_31

public Triangle_dt next_31()

returns the consecutive triangle which shares this triangle p3,p1 edge.

getBoundingBox

public BoundingBox getBoundingBox()

Returns:

The bounding rectange between the minimum and maximum coordinates of the triangle

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

contains

public boolean contains(Point_dt p)

determinates if this triangle contains the point p.

Parameters:

p - the query point

Returns:

true iff p is not null and is inside this triangle (Note: on boundary is considered inside!!).

contains_BoundaryIsOutside

public boolean contains_BoundaryIsOutside(Point_dt p)

determinates if this triangle contains the point p.

Parameters:

p - the query point

Returns:

true iff p is not null and is inside this triangle (Note: on boundary is considered outside!!).

isCorner

public boolean isCorner(Point_dt p)

Checks if the given point is a corner of this triangle.

Parameters:

p - The given point.

Returns:

True iff the given point is a corner of this triangle. By Eyal Roth & Doron Ganel.

fallInsideCircumcircle

public boolean fallInsideCircumcircle(Point_dt[] arrayPoints)

z_value

public double z_value(Point_dt q)

compute the Z value for the X,Y values of q.
assume this triangle represent a plane --> q does NOT need to be contained in this triangle.

Parameters:

q - query point (its Z value is ignored).

Returns:

the Z value of this plane implies by this triangle 3 points.

z

public double z(double x,
                double y)

compute the Z value for the X,Y values of q. assume this triangle represent a plane --> q does NOT need to be contained in this triangle.

Parameters:

x - x-coordinate of the query point.

y - y-coordinate of the query point.

Returns:

z (height) value approximation given by the triangle it falls in.

z

public Point_dt z(Point_dt q)

compute the Z value for the X,Y values of q. assume this triangle represent a plane --> q does NOT need to be contained in this triangle.

Parameters:

q - query point (its Z value is ignored).

Returns:

q with updated Z value.