Java Rectangle subdivideRectangle(int width, int height, int numTilesX, int numTilesY, int extraBorder)

Description

Subdivides a rectangle into tiles.

License

Open Source License

Parameter

Parameter	Description
width	the rectangle's width
height	the rectangle's height
numTilesX	the number of tiles in X direction
numTilesY	the number of tiles in Y direction
extraBorder	an extra border size to extend each tile

Return

the tile coordinates as rectangles

Declaration

public static Rectangle[] subdivideRectangle(int width, int height, int numTilesX, int numTilesY,
        int extraBorder) 

Method Source Code

//package com.java2s;
/*//from   ww w .  j a v a  2  s. com
 * Copyright (C) 2010 Brockmann Consult GmbH (info@brockmann-consult.de)
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 3 of the License, or (at your option)
 * any later version.
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see http://www.gnu.org/licenses/
 */

import java.awt.Rectangle;

public class Main {
    /**
     * Subdivides a rectangle into tiles. The coordinates of each returned tile rectangle are guaranteed
     * to be within the given rectangle.
     *
     * @param width       the rectangle's width
     * @param height      the rectangle's height
     * @param numTilesX   the number of tiles in X direction
     * @param numTilesY   the number of tiles in Y direction
     * @param extraBorder an extra border size to extend each tile
     *
     * @return the tile coordinates as rectangles
     */
    public static Rectangle[] subdivideRectangle(int width, int height, int numTilesX, int numTilesY,
            int extraBorder) {
        Rectangle[] rectangles = new Rectangle[numTilesX * numTilesY];
        int k = 0;
        float w = (float) width / numTilesX;
        float h = (float) height / numTilesY;
        for (int j = 0; j < numTilesY; j++) {
            int y1 = (int) Math.floor((j + 0) * h);
            int y2 = (int) Math.floor((j + 1) * h) - 1;
            if (y2 < y1) {
                y2 = y1;
            }
            y1 -= extraBorder;
            y2 += extraBorder;
            if (y1 < 0) {
                y1 = 0;
            }
            if (y2 > height - 1) {
                y2 = height - 1;
            }
            for (int i = 0; i < numTilesX; i++) {
                int x1 = (int) Math.floor((i + 0) * w);
                int x2 = (int) Math.floor((i + 1) * w) - 1;
                if (x2 < x1) {
                    x2 = x1;
                }
                x1 -= extraBorder;
                x2 += extraBorder;
                if (x1 < 0) {
                    x1 = 0;
                }
                if (x2 > width - 1) {
                    x2 = width - 1;
                }

                rectangles[k] = new Rectangle(x1, y1, (x2 - x1) + 1, (y2 - y1) + 1);
                k++;
            }
        }
        return rectangles;
    }
}

Related

1. rectFromRect2D(Rectangle2D rect)
2. resetPosition(Window window1, Window window2)
3. right(Rectangle r)
4. size(final Component component)
5. subdivide(Dimension dimension, int threshold, int max)
6. subtractInsets(Rectangle base, Insets insets)
7. subtractInto(Insets i1, Rectangle r2)
8. translate(RectangularShape r, double dx, double dy)