Collision detection between images
Hi everyone. I have been creating a game for my Computer science coursework. So far i have the animation and the mouse movement working without any problem, but i can't get the collision detection to work. Can anyone have a look at the code and see what is wrong.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.awt.image.*;
import java.awt.geom.*;
public class GameDesignPanel extends JPanel implements MouseListener,
MouseMotionListener,
Runnable{
Thread runner;
BoundedImage cow, cow1, cow2, cow3;
BoundedImage person, pick;
BoundedImage tree, tree1, tree2, tree3, tree4;
BoundedImage pub;
Image personObj;
int personX;
int personY;
Image pubObj;
Image cowObj;
Image treeObj;
int x = 10;
int y = 300;
int moveAmount = 5;
// List of BoundedImages, that will represent the person and the scene Objects
private LinkedList sceneObjects;
public GameDesignPanel(int personX1, int personY1) {
super();
sceneObjects = new LinkedList();
pick = null;
personX = personX1;
personY = personY1;
setBackground(Color.white);
// Declare the cow object
Toolkit kit = Toolkit.getDefaultToolkit();
cowObj = kit.getImage("cow.jpg");
cow = new BoundedImage(cowObj, this);
cow1 = new BoundedImage(cowObj, this);
cow2 = new BoundedImage(cowObj, this);
cow3 = new BoundedImage(cowObj, this);
treeObj = kit.getImage("tree.jpg");
tree = new BoundedImage(treeObj, this);
tree1 = new BoundedImage(treeObj, this);
tree2 = new BoundedImage(treeObj, this);
tree3 = new BoundedImage(treeObj, this);
tree4 = new BoundedImage(treeObj, this);
//Declare the pub Object
pubObj = kit.getImage("pub.jpg");
pub = new BoundedImage(pubObj, this);
//Declare the person object
personObj = kit.getImage("cartman1.gif");
person = new BoundedImage(personObj, this);
Random r = new Random();
int width = (int)getSize().getWidth();
int height = (int)getSize().getHeight();
cow1.movePosition(new Point(20, 40));
sceneObjects.add(person);
sceneObjects.add(cow);
sceneObjects.add(cow1);
sceneObjects.add(cow2);
sceneObjects.add(cow3);
sceneObjects.add(tree);
sceneObjects.add(tree1);
sceneObjects.add(tree2);
sceneObjects.add(tree3);
sceneObjects.add(tree4);
sceneObjects.add(pub);
addMouseListener(this);
addMouseMotionListener(this);
// Assign all the Images to the relevant BoundedImage
}
public void paintComponent(Graphics g){
Graphics2D g2D = (Graphics2D)g;
BoundedImage bi;
g2D.setColor(Color.white);
g2D.fillRect(0, 0, getSize().width, getSize().height);
g2D.drawImage(cow.getImage(), x, y, this);
g2D.drawImage(person.getImage(), person.getTransform(), this);
g2D.drawImage(cow1.getImage(), cow1.getTransform(), this);
g2D.drawImage(cow2.getImage(), 130, 100, this);
g2D.drawImage(cow3.getImage(), 300, 20, this);
g2D.drawImage(tree.getImage(), 10, 500, this);
g2D.drawImage(tree1.getImage(), 30, 400, this);
g2D.drawImage(tree2.getImage(), 300, 200, this);
g2D.drawImage(tree3.getImage(), 500, 357, this);
g2D.drawImage(tree4.getImage(), 340, 240, this);
I CAN'T UNDERSTAND WHY THIS DOESN'T WORK
if(person.getBounds2D().intersects(tree4.getBounds2D())){
g2D.drawString("colllision", 10, 30);
}
}
/**
* Starts the animation
*/
void playAnimation() {
if (runner == null) {
runner = new Thread(this);
runner.start();
}//if
}// playAnimation()
/**
*Stops the animation
*/
void stopAnimation() {
if (runner != null) {
runner = null;
}//if
}// stopAnimation()
public void run() {
while(true){
x += moveAmount;
walk(10, getSize().width + 20);
if ((x > 400) | (x < 5))
x *= -1;
repaint();
try {
Thread.sleep(100);
} catch (InterruptedException e) {}
}
}
public void walk(int start, int end){
for (int i = start; i < end; i +=moveAmount){
x = i;
//x *= -1;
repaint();
pause(150);
}
}
public void pause(int time){
try {
Thread.sleep(time);
} catch (InterruptedException e) {}
}
public void mouseClicked(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mousePressed(MouseEvent e){
if(pick == null){
BoundedImage bi;
for(int i = 0; i < 11; i++){
bi = (BoundedImage)sceneObjects.get(0);
//Pick up person
if(bi.getBounds2D().contains(e.getPoint())){
person = bi;
return;
}
}
}
}
public void mouseReleased(MouseEvent e){
repaint();
}
// method from mousemotionlisteren
public void mouseDragged(MouseEvent e){
if(person != null){
person.movePosition(e.getPoint());
repaint();
}
}
public void mouseMoved(MouseEvent e){
}
}
Any help or suggestions would be really appreciated. Thank you
