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java.lang.Object math.geom2d.Angle2D
public class Angle2D
This class is only devoted to static computations.
Field Summary  

static double 
M_2PI
The constant for 2*PI, equivalent to 360 degrees. 
static double 
M_3PI_2
The constant for 3*PI/2, equivalent to 270 degrees. 
static double 
M_PI
The constant for PI, equivalent to 180 degrees. 
static double 
M_PI_2
The constant for PI/2, equivalent to 90 degrees. 
static double 
M_PI_4
The constant for 3*PI/4, equivalent to 45 degrees. 
Constructor Summary  

Angle2D()

Method Summary  

static double 
absoluteAngle(double x1,
double y1,
double x2,
double y2,
double x3,
double y3)
Returns the absolute angle between the ray formed by (p2, p1) and the ray formed by (p2, p3), where pi = (xi,yi), i=1,2,3. 
static double 
absoluteAngle(Point2D p1,
Point2D p2,
Point2D p3)
Returns the absolute angle between the ray formed by (p2, p1) and the ray formed by (p2, p3). 
static boolean 
almostEquals(double angle1,
double angle2,
double eps)
Checks whether two angles are equal, with respect to the given error bound. 
static double 
angle(double x1,
double y1,
double x2,
double y2,
double x3,
double y3)
Returns the oriented angle between the ray formed by (p2, p1) and the ray formed by (p2, p3), where pi = (xi,yi), i=1,2,3. 
static double 
angle(LinearShape2D obj1,
LinearShape2D obj2)
Returns the oriented angle between two (directed) straight objects. 
static double 
angle(Point2D p1,
Point2D p2,
Point2D p3)
Returns the oriented angle between the ray formed by (p2, p1) and the ray formed by (p2, p3). 
static double 
angle(Vector2D vect1,
Vector2D vect2)
Returns the oriented angle between two vectors. 
static boolean 
containsAngle(double startAngle,
double endAngle,
double angle)
Tests if an angle belongs to an angular interval, defined by two limit angle, counted Counterclockwise. 
static boolean 
containsAngle(double startAngle,
double endAngle,
double angle,
boolean direct)
Tests if an angle belongs to an angular interval, defined by two limit angles, and an orientation flag. 
static boolean 
equals(double angle1,
double angle2)
Checks whether two angles are equal, given a default threshold value. 
static double 
formatAngle(double angle)
Formats an angle between 0 and 2*PI. 
static double 
horizontalAngle(double x,
double y)
Returns the horizontal angle formed by the line joining the origin and the point with given coordinate. 
static double 
horizontalAngle(double x1,
double y1,
double x2,
double y2)
Returns the horizontal angle formed by the line joining the two given points. 
static double 
horizontalAngle(LinearShape2D object)
Returns the horizontal angle formed by the line joining the two given points. 
static double 
horizontalAngle(Point2D point)
Returns the horizontal angle formed by the line joining the origin and the given point. 
static double 
horizontalAngle(Point2D p1,
Point2D p2)
Returns the horizontal angle formed by the line joining the two given points. 
static double 
horizontalAngle(Vector2D vect)
Returns the horizontal angle formed by the line joining the origin and the point with given coordinate. 
static double 
pseudoAngle(Point2D p1,
Point2D p2)
Computes the pseudoangle of a line joining the 2 points. 
Methods inherited from class java.lang.Object 

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

public static final double M_PI
public static final double M_2PI
public static final double M_PI_2
public static final double M_3PI_2
public static final double M_PI_4
Constructor Detail 

public Angle2D()
Method Detail 

public static double formatAngle(double angle)
angle
 the angle before formatting
public static double horizontalAngle(Point2D point)
public static double horizontalAngle(double x, double y)
public static double horizontalAngle(Vector2D vect)
public static double horizontalAngle(LinearShape2D object)
public static double horizontalAngle(Point2D p1, Point2D p2)
public static double horizontalAngle(double x1, double y1, double x2, double y2)
public static double pseudoAngle(Point2D p1, Point2D p2)
Computes the pseudoangle of a line joining the 2 points. The pseudoangle has same ordering property has natural angle, but is expected to be computed faster. The result is given between 0 and 360.
p1
 the initial pointp2
 the final point
public static double angle(LinearShape2D obj1, LinearShape2D obj2)
public static double angle(Vector2D vect1, Vector2D vect2)
public static double angle(Point2D p1, Point2D p2, Point2D p3)
public static double angle(double x1, double y1, double x2, double y2, double x3, double y3)
public static double absoluteAngle(Point2D p1, Point2D p2, Point2D p3)
public static double absoluteAngle(double x1, double y1, double x2, double y2, double x3, double y3)
public static boolean almostEquals(double angle1, double angle2, double eps)
angle1
 first angle to compareangle2
 second angle to compareeps
 the threshold value for comparison
public static boolean equals(double angle1, double angle2)
angle1
 first angle to compareangle2
 second angle to compare
public static boolean containsAngle(double startAngle, double endAngle, double angle)
startAngle
 the beginning of the angular domainendAngle
 the end of the angular domainangle
 the angle to test
public static boolean containsAngle(double startAngle, double endAngle, double angle, boolean direct)
startAngle
 the beginning of the angular domainendAngle
 the end of the angular domainangle
 the angle to testdirect
 is true if angular domain is oriented Counter clockwise, and
false if angular domain is oriented clockwise.


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