[SOLVED] LibGDX Tilemap Null Tiles

syszee · February 20, 2015, 2:58am

For reference, I am following this source:

libgdx/libgdx/blob/master/tests/gdx-tests/src/com/badlogic/gdx/tests/superkoalio/SuperKoalio.java

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package com.badlogic.gdx.tests.superkoalio;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Keys;

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Hi there!

I am having a bit of an issue at the moment. If you take a look at that source link, you will see a method titled “getTiles” with several parameters. I am doing this exact same thing for a collision practice thing. The issue I am having is that the cells are returning null, so the tiles are never actually added or I guess “registered” in this case. The (if cell != null) never gets to run.

I am using the Tiled program for the tilemap and have textures on a layer, so I’m not sure what the issue is. Do I need to tick some setting for it to no longer return null?

Thanks!

A

bornander · February 20, 2015, 9:13am

You’ll get null if the cell is not populated, are you sure you’re calling it with valid coordinates?
Are you sure you’re doing it on the correct layer?

Can you show some of your code?

syszee · February 20, 2015, 3:38pm

Sure thing!

	private void getTiles (int startX, int startY, int endX, int endY, Array<Rectangle> tiles) {
		TiledMapTileLayer layer = (TiledMapTileLayer)map.getLayers().get(1);
		rectPool.freeAll(tiles);
		tiles.clear();
		for (int y = startY; y <= endY; y++) {
			for (int x = startX; x <= endX; x++) {
				Cell cell = layer.getCell(x, y);
				if (cell != null) {
					Rectangle rect = rectPool.obtain();
					rect.set(x, y, 1, 1);
					tiles.add(rect);
				}
			}
		}
	}

cylab · February 20, 2015, 8:35pm

map.getLayers().get(1)

Off-By-One? Are you sure you don’t want get(0) ?

syszee · February 20, 2015, 9:57pm

I fixed the issue by rewriting the entire thing. I’m assuming that the problem was just that camera/tilemap scaling was not linking up correctly and it wasn’t detecting any tiles near the coordinates. Now I’m trying to figure out to efficiently setup camera culling… Any ideas on that?

Ed_RockStarGuy · February 20, 2015, 10:44pm

Just remember to add [Solved] at the start of the title of the topic