Class MathUtils

java.lang.Object
org.glavo.monetfx.internal.utils.MathUtils
public class MathUtils extends Object
Utility methods for mathematical operations.

  • Method Summary

    Modifier and Type
    Method
    Description
    static double
    clampDouble(double min, double max, double input)
    Clamps an integer between two floating-point numbers.
    static int
    clampInt(int min, int max, int input)
    Clamps an integer between two integers.
    static double
    differenceDegrees(double a, double b)
    Distance of two points on a circle, represented using degrees.
    static double
    lerp(double start, double stop, double amount)
    The linear interpolation function.
    static double[]
    matrixMultiply(double[] row, double[][] matrix)
    Multiplies a 1x3 row vector with a 3x3 matrix.
    static double
    rotationDirection(double from, double to)
    Sign of direction change needed to travel from one angle to another.
    static double
    sanitizeDegreesDouble(double degrees)
    Sanitizes a degree measure as a floating-point number.
    static int
    sanitizeDegreesInt(int degrees)
    Sanitizes a degree measure as an integer.
    static int
    signum(double num)
    The signum function.

    Methods inherited from class java.lang.Object

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

  • Method Details

    • signum

      public static int signum(double num)
      The signum function.
      Returns:
      1 if num > 0, -1 if num invalid input: '<' 0, and 0 if num = 0

    • lerp

      public static double lerp(double start, double stop, double amount)
      The linear interpolation function.
      Returns:
      start if amount = 0 and stop if amount = 1

    • clampInt

      public static int clampInt(int min, int max, int input)
      Clamps an integer between two integers.
      Returns:
      input when min invalid input: '<'= input invalid input: '<'= max, and either min or max otherwise.

    • clampDouble

      public static double clampDouble(double min, double max, double input)
      Clamps an integer between two floating-point numbers.
      Returns:
      input when min invalid input: '<'= input invalid input: '<'= max, and either min or max otherwise.

    • sanitizeDegreesInt

      public static int sanitizeDegreesInt(int degrees)
      Sanitizes a degree measure as an integer.
      Returns:
      a degree measure between 0 (inclusive) and 360 (exclusive).

    • sanitizeDegreesDouble

      public static double sanitizeDegreesDouble(double degrees)
      Sanitizes a degree measure as a floating-point number.
      Returns:
      a degree measure between 0.0 (inclusive) and 360.0 (exclusive).

    • rotationDirection

      public static double rotationDirection(double from, double to)
      Sign of direction change needed to travel from one angle to another.

      For angles that are 180 degrees apart from each other, both directions have the same travel distance, so either direction is shortest. The value 1.0 is returned in this case.

      Parameters:
      from - The angle travel starts from, in degrees.
      to - The angle travel ends at, in degrees.
      Returns:
      -1 if decreasing from leads to the shortest travel distance, 1 if increasing from leads to the shortest travel distance.

    • differenceDegrees

      public static double differenceDegrees(double a, double b)
      Distance of two points on a circle, represented using degrees.

    • matrixMultiply

      public static double[] matrixMultiply(double[] row, double[][] matrix)
      Multiplies a 1x3 row vector with a 3x3 matrix.