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Thread: GAME VIEW - flashing

  1. #1
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    Default GAME VIEW - flashing

    Hi guys, i have a little problem. I program a game like Sokoban. When I make a move with a "man" display flashes. I know that I must use doubleBuffer but i dont know hot to make it in my code. Please can you help me ?

        public void initWorld() {
            int x = OFFSET;
            int y = OFFSET;
            Wall wall;
            Place place;
            Box box;
     
     
            for (int i = 0; i < level.length(); i++) {
                char item = level.charAt(i);
     
                if (item == '\n') {
                    y += SPACE;
                    x = OFFSET;
     
                } else if (item == '#') {
                    wall = new Wall(x, y);
                    walls.add(wall);
                    x += SPACE;
                } else if (item == '@') {
                    soko = new Player(x, y);
                    x += SPACE;
                } else if (item == 'o') {
                    box = new Box(x, y);
                    boxes.add(box);
                    x += SPACE;
                } else if (item == '.') {
                    place = new Place(x, y);
                    areas.add(place);
                    x += SPACE;
                } else if (item == ' ') {
                    x += SPACE;
                }
                h = y;
            }
     
        }
     
        public void buildWorld(Graphics g) {
            g.setColor(new Color(250, 240, 170));
             g.fillRect(0, 0, this.getWidth(), this.getHeight());
            ArrayList world = new ArrayList();
            world.addAll(walls);
            world.addAll(areas);
            world.addAll(boxes);
            world.add(soko);
     
            for (int i = 0; i < world.size(); i++) {
     
                Actor item = (Actor) world.get(i);
                g.drawImage(item.getImage(), item.x(), item.y(), this);
     
            }
        }
     
        @Override
        public void paint(Graphics g) {
            super.paint(g); 
            buildWorld(g);
    }


  2. #2
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    Default Re: GAME VIEW - flashing

    Well first off fix your sentence... I cannot understand the grammar.. Or it might just be because English is not my main language.
    Secondly, post the things you have tried to do in your code to fix the problem.

  3. #3
    Super Moderator Norm's Avatar
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    Default Re: GAME VIEW - flashing

    Take a look at this thread and see how that OP did it:
    Animation and double buffering
    If you don't understand my answer, don't ignore it, ask a question.

  4. #4
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    Default Re: GAME VIEW - flashing

    A comment: The arraylist should NOT be defined and filled in code running inside the call to paint() method.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: GAME VIEW - flashing

    I fixed the problem with figure. But it still blinks sometimes. Where should I put the arraylist ? =O

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    Default Re: GAME VIEW - flashing

    Move the arraylist to where it is defined one time and filled as needed. Don't do it every time paint() is called.
    If you don't understand my answer, don't ignore it, ask a question.

  7. #7
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    Default Re: GAME VIEW - flashing

    I move arraylist away. But still blinks sometimes ! When i changed super.paint(g) to super.repaint() it works, but i dont see JPanel's components.

    --- Update ---

    Yeeees, I fixed it, thank you guys

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