Java interpolate interpolate(int a, int b, int theta, int reciprocal)

Description

Interpolates two smooth noise values.

License

Open Source License

Parameter

Parameter	Description
a	The first smooth noise value.
b	The second smooth noise value.
theta	The angle.
reciprocal	The frequency reciprocal.

Return

The interpolated value.

Declaration

private static int interpolate(int a, int b, int theta, int reciprocal) 

Method Source Code

//package com.java2s;

public class Main {
    /**// w w w . j  ava 2  s.c o m
     * The cosine table used for interpolation.
     */
    private static final int[] COSINE = new int[2048];

    /**
     * Interpolates two smooth noise values.
     *
     * @param a The first smooth noise value.
     * @param b The second smooth noise value.
     * @param theta The angle.
     * @param reciprocal The frequency reciprocal.
     * @return The interpolated value.
     */
    private static int interpolate(int a, int b, int theta, int reciprocal) {
        int cosine = 65536 - COSINE[theta * COSINE.length / (2 * reciprocal)] / 2;
        return (a * (65536 - cosine)) / 65536 + (b * cosine) / 65536;
    }
}

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