Module org.jhotdraw8.geom

Package org.jhotdraw8.geom.contour

Class Utils

java.lang.Object

org.jhotdraw8.geom.contour.Utils

public class Utils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final double	offsetThreshold
static final double	realPrecision	absolute threshold to be used for reals in common geometric computation (e.g.
static final double	sliceJoinThreshold	absolute threshold to be used for joining slices together at end points
static final double	tau

Method Summary

Modifier and Type	Method	Description
static double	angle(Point2D.Double p0, Point2D.Double p1)	Counter clockwise angle of the vector going from p0 to p1.
static double	deltaAngle(double angle1, double angle2)	Returns the smaller difference between two angles, result is negative if angle2 < angle1.
static boolean	fuzzyInRange(double minValue, double value, double maxValue)
static boolean	fuzzyInRange(double minValue, double value, double maxValue, double epsilon)
static OrderedPair<Double,Double>	minmax(double a, double b)
static double	normalizeRadians(double angle)	Normalize radians to be between 0 and 2PI, e.g.
static double	perpDot(Point2D.Double v0, Point2D.Double v1)
static Point2D.Double	pointFromParametric(Point2D.Double p0, Point2D.Double p1, double t)	Return the point on the segment going from p0 to p1 at parametric value t.
static Point2D.Double	unitPerp(Point2D.Double v)	Normalized perpendicular vector to v (rotating counter clockwise).

Methods inherited from class java.lang.Object

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

Field Details

realPrecision

public static final double realPrecision

absolute threshold to be used for reals in common geometric computation (e.g. to check for singularities).

See Also:

• Constant Field Values

sliceJoinThreshold

public static final double sliceJoinThreshold

absolute threshold to be used for joining slices together at end points

See Also:

• Constant Field Values

tau

public static final double tau

See Also:

• Constant Field Values

offsetThreshold

public static final double offsetThreshold

See Also:

• Constant Field Values

Method Details

perpDot

public static double perpDot(Point2D.Double v0,
 Point2D.Double v1)

minmax

public static OrderedPair<Double,Double> minmax(double a,
 double b)

fuzzyInRange

public static boolean fuzzyInRange(double minValue,
 double value,
 double maxValue)

fuzzyInRange

public static boolean fuzzyInRange(double minValue,
 double value,
 double maxValue,
 double epsilon)

pointFromParametric

public static Point2D.Double pointFromParametric(Point2D.Double p0,
 Point2D.Double p1,
 double t)

Return the point on the segment going from p0 to p1 at parametric value t.

angle

public static double angle(Point2D.Double p0,
 Point2D.Double p1)

Counter clockwise angle of the vector going from p0 to p1.

deltaAngle

public static double deltaAngle(double angle1,
 double angle2)

Returns the smaller difference between two angles, result is negative if angle2 < angle1.

normalizeRadians

public static double normalizeRadians(double angle)

Normalize radians to be between 0 and 2PI, e.g. -PI/4 becomes 7PI/8 and 5PI becomes PI.

unitPerp

public static Point2D.Double unitPerp(Point2D.Double v)

Normalized perpendicular vector to v (rotating counter clockwise).