com.attivio.util

Class GeometryUtils

java.lang.Object

com.attivio.util.GeometryUtils

public final class GeometryUtils
extends Object

Utility functions for geometry classes.

Field Summary

Fields

Modifier and Type	Field and Description
static double	EPSILON Small double for "equality" checks.

Method Summary

Modifier and Type	Method and Description
static boolean	equals(double a, double b) Check if 2 double values are equal (withing EPSILON of each other).
static boolean	equals(double x1, double y1, double x2, double y2) Check if 2 points equal.
static double	getAngle(double x0, double y0, double x1, double y1) Calculate the angle between a line defined by 2 points.
static boolean	isNonZero(double value) Checks if value is not within EPSILON of 0.0.
static boolean	isZero(double value) Checks if value is within EPSILON of 0.0.
static boolean	lineContains(double x0, double y0, double x1, double y1, double x2, double y2) Checks if point (x0, y0) is in line (x1, y1), (x2, y2).
static boolean	linesIntersect(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4) Checks if line (x1, y1), (x2, y2) intersects the line (x3, y3), (x4, y4).
static Shape	toShape(Object value) Get a shape for value (if possible).

Methods inherited from class java.lang.Object

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

Field Detail

EPSILON

public static final double EPSILON

Small double for "equality" checks.

See Also:

Constant Field Values

Method Detail

isZero

public static boolean isZero(double value)

Checks if value is within EPSILON of 0.0.

isNonZero

public static boolean isNonZero(double value)

Checks if value is not within EPSILON of 0.0.

equals

public static boolean equals(double a,
                             double b)

Check if 2 double values are equal (withing EPSILON of each other).

equals

public static boolean equals(double x1,
                             double y1,
                             double x2,
                             double y2)

Check if 2 points equal.

lineContains

public static boolean lineContains(double x0,
                                   double y0,
                                   double x1,
                                   double y1,
                                   double x2,
                                   double y2)

Checks if point (x0, y0) is in line (x1, y1), (x2, y2).

linesIntersect

public static boolean linesIntersect(double x1,
                                     double y1,
                                     double x2,
                                     double y2,
                                     double x3,
                                     double y3,
                                     double x4,
                                     double y4)

Checks if line (x1, y1), (x2, y2) intersects the line (x3, y3), (x4, y4).

getAngle

public static double getAngle(double x0,
                              double y0,
                              double x1,
                              double y1)

Calculate the angle between a line defined by 2 points.

toShape

public static Shape toShape(Object value)

Get a shape for value (if possible).