Computes an inverse linear interpolation, returning an interpolation fraction. - Java java.lang

Java examples for java.lang:Math Calculation

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Description

Computes an inverse linear interpolation, returning an interpolation fraction.

Demo Code


//package com.java2s;

public class Main {
    private static final double EPSILON = 1e-30d;

    /**//w  ww .j  av  a  2  s .co  m
     * Computes an inverse linear interpolation, returning an interpolation
     * fraction. Returns 0.5 if the min and max values are the same.
     * @param x the interpolated value
     * @param min the minimum value (corresponds to f==0)
     * @param min the maximum value (corresponds to f==1)
     * @return the inferred interpolation fraction
     */
    public static double invLinearInterp(final double x, final double min,
            final double max) {
        final double denom = max - min;
        return denom < EPSILON && denom > -EPSILON ? 0 : (x - min) / denom;
    }
}

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