Box2dLights: Fatal error when disposing lights + ConeLight doesnt work

thanks for dropping over.

I got 2 issues with Box2DLights.

The first one isn't that important to solve, the second, however,

#1 : disposing lights

I got multiple PointLights that follow a porjectile. So every porjectile has an ArrayList with all the PointLights it needs in it. When the porjectile hits an object all the Lights should get disposed. Apparently that´s a problem.

if(hit){
      deleted = true;
      for(int i = 0; i<myLight.size();i++){
         myLight.get(i).dispose();
       }
}

This causes a Fatal Exeption

A fatal error has been detected by the Java Runtime Environment: EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffc6fc59f58, pid=6944, tid=6676 JRE version: Java(TM) SE Runtime Environment (8.0_45-b15) (build 1.8.0_45-b15) Java VM: Java HotSpot(TM) 64-Bit Server VM (25.45-b02 mixed mode windows-amd64 compressed oops) Problematic frame: C [ntdll.dll+0x39f58] Failed to write core dump. Minidumps are not enabled by default on client versions of Windows

The problem, I guess, is that a disposed object somehow cant be referenced anymore by the ArrayList. The question is how to do this better.

#2 : ConeLight crashs my JavaTm (?)

When adding a ConeLight to my game

playerLight = new ConeLight(this,100,Color.WHITE,100,1920f/2f,1080f/2f,0,60);

//used "this" because I called this method in a class that extends RayHandler

my game just freezes in the Main Menu when pressing "Play" the MainMenu Screen just freezes and a little window appears that says:

"Java(TM) SE binary doesn't work anymore"

PointLight, howeever, works perfectly. I honestly have no clue and whether this is my fault or a bug.

Solution

I have solved it, FINALLY. It was a pretty dumb mistake:

As I dont really need a World object, the RayHandler constructor, however, does, I created a World gave it the rayhandler and disposed it afterwards. Stupid, I know. So instead of

    public void create(){
       ....
       World world = new World(new Vector2(0,0),false);
       rayHandler = new RayHandler(world);
       world.dispose;
    }

You need to move world.dispose to the dispose method and make world a field.

public void create(){
       ....
       world = new World(new Vector2(0,0),false);
       rayHandler = new RayHandler(world);

    }
...
public void dispose(){
      ...
      rayHandler.dispose;
      world.dispose();
}