Thread: Image "flickers", need help!

Hi!

Im currently making a game with a rpg tile-based world. The problem is that the world gets "cracks" as if it flickers. I have never encountered this problem before and have no idea what it is.
In the original edit I will not post any code since I do not know in which section the problem might occur, however, I will attach an image displaying the error.

game_example.jpg

I should also mention that the error only occur when the player's x or y velocity is negative.

Flickering is a common problem, and unfortunately can be caused by many things.

Since graphics can be handled in so many ways, start off by giving a general summary of how you handle your drawing. (are you buffereing manually, double triple buffering, using a strategy, page flipping, etc?)
Include any code snippets you have that you think may be running a bit sluggish.

Hi!

I have picked out some code snippets that could cause the problem. The first example is the drawing code of my main JPanel. This is were my buffering takes place.

	@Override
	public void update(Graphics arg0) {
 
		paint(arg0);
	}
 
	@Override
	public void paint(Graphics arg0) {
 
 
		Graphics2D g = (Graphics2D) arg0;
 
		bufferGraphics.clearRect(0, 0, getSize().width, getSize().height); //bufferGraphics = offscreen.getGraphics();
 
		screen.drawScreen(bufferGraphics);
 
		g.drawImage(offscreen, 0, 0, this);	
	}

I also decided to post my code for drawing the level.
The way this is supposed to work is, that it renders all tiles inside the screen borders + 4 tiles outside each border.

@Override
	public void render(Graphics2D g) {
 
		int var0 = level.getTileset().getTileSize();
 
		for (int i = 0; i < level.world.length; i++) {
 
			if (i * var0 + level.xOffset > level.getSize().width + var0 * 4) break;
 
			if (i * var0 + level.xOffset + var0 < - (var0 * 4)) continue;
 
			for (int j = 0; j < level.world[0].length; j++) {
 
				if (j * var0 + level.yOffset > level.getSize().height + var0 * 4) break;
 
				if (j * var0 + level.yOffset + var0 < -(var0 * 4)) continue;
 
				TileStack var1 = level.world[i][j];
 
				var1.getTile().getRenderer().renderWithMetadata(g, level.getTileset(),
						i * var0 + level.xOffset, j * var0 + level.yOffset, var1.getMetadata());
			}
		}
	}

Is the crack in a permanent location on the screen as you walk and the map scrolls? ..Is it in a permanent location on the map, ie the crack moves with the ground?

I should have read more of the original post, I got to the word "flickers" and the rest is a blur. Now that I look at it again your last comment is a large hint to finding the cause.