Having trouble with the screen class..

Newbie & Debugging Questions
#1

I’m just getting back into this after a long break so bare with me…Basically, i’m making a 2d tiled game and having a big issue off gate…I’m implementing Screens with libgdx and basically, I immediately set it to the gamescreen and render tiles…I’m getting a NPE on my camera and my renderer in the render method…I think it’s calling the render class before calling create() where the objects are created…I made a post over at stack exchange with the code:

I know it’s gotta be something simple that i’m just missing…I just can’t find it.

#2

Looks like the problem is here:

OrthogonalTiledMapRenderer renderer = new OrthogonalTiledMapRenderer(map,unitScale);
OrthographicCamera camera = new OrthographicCamera();

You’re creating a camera and map renderer that have a scope that is just that show method,and your camera and renderer in your screen class aren’t being created, which is why they are still null, even after show().

#3

Ah…I see what you’re saying…I forgot more than I thought…so I should be passing the objects through to the render class? That doesn’t seem right…It could get pretty lengthy.

#4

No, sorry if I didn’t make it more clear. Instead of doing:

TiledMap map = new TmxMapLoader().load("tdmap1.tmx");
OrthogonalTiledMapRenderer renderer = new OrthogonalTiledMapRenderer(map,unitScale);
OrthographicCamera camera = new OrthographicCamera();

try making it

map = new TmxMapLoader().load("tdmap1.tmx");
renderer = new OrthogonalTiledMapRenderer(map,unitScale);
camera = new OrthographicCamera();

because then you are using your class variables that are used in the render method.

#5

…

Wow, i’m an idiot haha. I don’t know how I missed that. I knew it was something dumb. I appreciate it! I guess I need to brush up on everything.