CODEWITHSUNDEEP
javarandom
user2292961
user2292961

Reputation: 1

how to slow down one method without affecting the rest of the program?

I'm making a game in Java and I want to create a character that moves randomly. The one I made is very spastic. I basically want to add a delay between random numbers generated. I'm a beginner so don't judge my code lol

public class Monster extends Entity{

private World world;

Image monster;

public Monster(int x, int y, World world) {
        super(x, y, world);
        w = 32;
        h = 32;
        this.world = world;
}

public void render(GameContainer gc, Graphics g) throws SlickException{
        super.render(gc, g);
        monster = new Image("gfx/world/monster.png");
        g.drawImage(monster, x, y);
}

public void update(GameContainer gc, int delta) throws SlickException{
    super.update(gc, delta);
    Random move = new Random();
    int number;

    for(int counter=1; counter<=1;counter++){
        number = move.nextInt(4); 
        System.out.println(number);


        if(number == 0){
            setDy(-1);
        }else if(number == 1){
            setDx(-1);
        }else if(number == 2){
            setDy(5);   
        }else if(number == 3){
            setDx(5);
        }else{
            setDx(0);
            setDy(0);

        }
    }
}
}

Upvotes: 0

Views: 825

Answers (3)

Nuno Pinheiro
Nuno Pinheiro

Reputation: 319

This is a common technique used on games to have a different update and render rate. What you have to do is (examples in pseudo code):

1 - Initialize a time variable - DateTime lastUpdate = new DateTime();

Every time you enter in the loop:

2 - Check if a certain time has passed - lastUpdate.hasPassed(X_TIME, new DateTime());

3 - if the time has passed (last line was true) lastUpdate = new DateTime();

4 - Else return

Upvotes: 1

Alex
Alex

Reputation: 11579

Try to add

 try {
      Thread.sleep(ms);
    } catch (InterruptedException e) {
      e.printStackTrace();
    }

where ms - how many miliseconds, e.g. 1000

Upvotes: 0

Steve Kallestad
Steve Kallestad

Reputation: 3573

You'll want to encapsulate the NPC movement in a separate thread, and within that thread call thread.sleep to pause the movement.

Here is a good tutorial on how to define threads, and the oracle docs show an example of a thread that sleeps.

Upvotes: 0

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