package org.ea.javacnn.data;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Arrays;
import java.util.Random;
import java.io.Serializable;

/**
 * Holding all the data handled by the network. So a layer will receive
 * this class and return a similar block as a output that will be used
 * by the next layer in the chain.
 *
 * @author Daniel Persson (mailto.woden@gmail.com)
 */
public class DataBlock implements Serializable {
    private int sx;
    private int sy;
    private int depth;
    private double[] w;
    private double[] dw;

    public DataBlock(int sx, int sy, int depth) {
        this(sx, sy, depth, -1.0);
    }

    public DataBlock(int sx, int sy, int depth, double c) {
        this.sx = sx;
        this.sy = sy;
        this.depth = depth;
        int n = sx * sy * depth;

        this.w = new double[n];
        this.dw = new double[n];
        if(c != -1.0) {
            Arrays.fill(this.w, c);
        } else {
            double scale = Math.sqrt(1.0 / n);
            Random r = new Random();
            for(int i=0; i