package HomeTasksTwoStars.Arrays;

import static myPrograms.ShowMatrixMethod.showMatrix;

/**
 * Created by Slava Provalov on 29.12.2015.
 */
public class SpiralCreator {
    public static void main(String[] args) {
        int rows = 5;
        int cols = 7;
        showMatrix(createSpiral(rows, cols));
    }

    public static int[][] createSpiral(int rows, int cols) {
        int[][] spiralMatrix = new int[rows][cols];
        int row = 0;
        int col = 0;
        int colsCounter = 1;
        int rowsCounter = 0;
        int dirChangesCounter = 0;
        int wayEndCounter = cols;
        for (int i = 1; i <= rows * cols; i++) {
            spiralMatrix[row][col] = i;
            wayEndCounter--;
            if (wayEndCounter == 0) {
                wayEndCounter = cols * (dirChangesCounter % 2) + rows * ((dirChangesCounter + 1) % 2) - (dirChangesCounter / 2 - 1) - 2;
                dirChangesCounter++;
                int temp = colsCounter;
                colsCounter = -rowsCounter;
                rowsCounter = temp;
            }
            col += colsCounter;
            row += rowsCounter;
        }
        return spiralMatrix;
    }
}