Java Matrix Flatten flattenN(float[][] in, int size, int width, float[] out)

Description

Flatten a 2D array with n items in the second dimension into a 1D array.

License

LGPL

Parameter

Parameter	Description
in	The array to be flattened
size	The number of items to copy from the in array
width	The number of items in the second dimension
out	The output array to write the values to

Declaration

public static void flattenN(float[][] in, int size, int width, float[] out) 

Method Source Code

//package com.java2s;
/*****************************************************************************
 *                        Web3d.org Copyright (c) 2001 - 2006
 *                               Java Source
 *
 * This source is licensed under the GNU LGPL v2.1
 * Please read http://www.gnu.org/copyleft/lgpl.html for more information
 *
 * This software comes with the standard NO WARRANTY disclaimer for any
 * purpose. Use it at your own risk. If there's a problem you get to fix it.
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 ****************************************************************************/

public class Main {
    /**//from ww w.j a v  a2 s .c  o  m
     * Flatten a 2D array with n items in the second dimension into a 1D array.
     * Generic but slower then the static sized conterparts.
     *
     * @param in The array to be flattened
     * @param size The number of items to copy from the in array
     * @param width The number of items in the second dimension
     * @param out The output array to write the values to
     */
    public static void flattenN(float[][] in, int size, int width, float[] out) {

        int count = size * width - 1;

        for (int i = size; --i >= 0;) {
            for (int j = width; --j >= 0;) {
                out[count--] = in[i][j];
            }
        }
    }

    /**
     * Flatten a 2D array with n items in the second dimension into a 1D array.
     *
     * @param in The array to be flattened
     * @param size The number of items to copy from the in array
     * @param width The number of items in the second dimension
     * @param out The output array to write the values to
     */
    public static void flattenN(double[][] in, int size, int width, double[] out) {

        int count = size * width - 1;

        for (int i = size; --i >= 0;) {
            for (int j = width; --j >= 0;) {
                out[count--] = in[i][j];
            }
        }
    }
}

Related

1. flatten(String[][] table)
2. flatten2DArray(byte[][] array)
3. flatten2DArray(double[][] array)
4. flatten4(float[][] in, int size, float[] out)
5. flattenIndicesCollection(int[][] multipleIndices, int[] extents)