Java Intersection Error

Question

I have this code for my DoLogic method. And I'm trying to do a intersection between the shots and the obstacles but I really can't think of nothing.. cause both are different objects.. i tried to do some but it didn't really detect something at all.

for(int i=0; i<shots.length; i++)
{
    if(shots[i] != null)
    {
        shots[i].moveShot(SHOTSPEED);
        if(shots[i].getXPos() > 1280)
        {
            shots[i] = null;
        }
    }
}
for(int i=0; i<obstacles.length; i++)
{
    if(obstacles[i] == null) 
    { 
        obstacles[i] = generateObstacle(); 
        break;
    } 
    if(obstacles[i] != null)
    {
        obstacles[i].moveObstacle(); 
        if(obstacles[i].getXPos() < 10) 
        { 
            obstacles[i] = null; 
        }
        else if(obstacles[i].intersects(Player1.character))
        {
            obstacles[i] = null;
            GameSounds.hit("/resources/8bit_bomb_explosion.wav");
            lives--;
        }
    }
}

Can you guys give me an example or at least an advice how to do an intersection between an obstacle and a shot?

Do these classes implement [`Shape`](http://docs.oracle.com/javase/7/docs/api/java/awt/Shape.html)? If not, they should. See also [this answer](http://stackoverflow.com/a/14575043/418556) for an SSCCE. — Andrew Thompson, Jul 15 '13 at 06:26
and i should implement the Rectangle in Obstacle and Oval in shot? cause that's what they are drawn as — angel darkland, Jul 15 '13 at 06:33
please whats isn't clear, and don't to load whatever on runtime, meaning GameSounds.hit("/resources/8bit_bomb_explosion.wav");, load this Object to local variable, on apps startup — mKorbel, Jul 15 '13 at 06:48
how do i make 2 objects from 2 different arraylists intersect? — angel darkland, Jul 15 '13 at 06:49

score 1 · Answer 1 · edited May 23 '17 at 11:49

1

Do these classes implement Shape? If not, they should. See the answer to Collision detection with complex shapes for an SSCCE.

..and i should implement the Rectangle in Obstacle and Oval in shot?

That seems logical to me, from your description of both objects.

..i just type implements Shape?

I would tend to use a Rectangle2D or Rectangle2D.Double for the obstacle & an Ellipse2D or Ellipse2D.Double for the shot. Rather than extend them, just hold them as an instance variable.

Give it a go & let us know how you go. If you get stuck, post an SSCCE of your best attempt.
You might need to hot-link to some small images.

.. ..

edited May 23 '17 at 11:49

Community

1
1

answered Jul 15 '13 at 06:51

Andrew Thompson

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same for ellipse2D .. it tells me to create an interface and if i try to implement rectangle to obstacle it tells me that it can't be a superinterface of obstacle.. cause an superinterface should be an interface – angel darkland Jul 15 '13 at 07:03

Java Intersection Error

1 Answers1