Check's for pixel-perfect collision between two buffered images. - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Pixel

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Description

Check's for pixel-perfect collision between two buffered images.

Demo Code


//package com.java2s;
import java.awt.image.BufferedImage;

public class Main {
    /**//  w  w w  .  j ava2 s .  c o  m
     * Check's for pixel-perfect collision between two buffered images.
     * 
     * @param x1 The x-position of the first object
     * @param y1 The y-position of the first object
     * @param image1 The buffered image of first object
     * @param x2 The x-position of the second object
     * @param y2 The y-position of the second object
     * @param image2 The buffered image of second object
     * @return True if a collision has been found
     */
    public static boolean isPixelPerfectCollision(float x1, float y1,
            BufferedImage image1, float x2, float y2, BufferedImage image2) {
        boolean bool = false;
        double width1 = x1 + image1.getWidth() - 1, height1 = y1
                + image1.getHeight() - 1, width2 = x2 + image2.getWidth()
                - 1, height2 = y2 + image2.getHeight() - 1;
        int xstart = (int) Math.max(x1, x2), ystart = (int) Math
                .max(y1, y2), xend = (int) Math.min(width1, width2), yend = (int) Math
                .min(height1, height2);
        int toty = Math.abs(yend - ystart);
        int totx = Math.abs(xend - xstart);
        for (int y = 1; y < toty - 1; y++) {
            int ny = Math.abs(ystart - (int) y1) + y;
            int ny1 = Math.abs(ystart - (int) y2) + y;
            for (int x = 1; x < totx - 1; x++) {
                int nx = Math.abs(xstart - (int) x1) + x;
                int nx1 = Math.abs(xstart - (int) x2) + x;
                try {
                    if (((image1.getRGB(nx, ny) & 0xFF000000) != 0x00)
                            && ((image2.getRGB(nx1, ny1) & 0xFF000000) != 0x00)) {
                        bool = true;
                    }
                } catch (Exception e) {
                }
            }
        }
        return bool;
    }
}

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