[1.12] World.getTileEntity returns null allthough TileEntity is loaded

[deerangle]

I am trying to access my TileEntity from another place (I know the coordinates of the TileEntity which I want to access). When I call World.getTileEntity, it returns null. I know that the TileEntity is loaded because I'm printing it's coordinates in the update function.

 

I'm getting the TileEntity on client side using World.getTileEntity but the update function is printing in the server thread only. I suspect that the TileEntity is loaded server-side only, and not on client side. I am using ForgeChunkManager to keep the chunk loaded.

 

How can I keep the chunk loaded on client-side aswell?

[Cadiboo]

  On 4/8/2019 at 11:35 AM, deerangle said:

How can I keep the chunk loaded on client-side aswell?

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Don't in short. If you need that for logic on the client, you should probably be doing that logic on the server and sending the result to the client.

[deerangle]

I am rendering the minecraft scene though a "camera" onto an FBO. The Camera stores the FBO index which needs to be retrieved and is responsible for rendering . This is impossible to do on the server.

[deerangle]

So how could I force the server to send these packets to the client? 

[deerangle]

So I came up with following Idea: 

WorldServer world = (WorldServer) event.getWorld();

Field pcm = WorldServer.class.getDeclaredField("playerChunkMap");
pcm.setAccessible(true);
PlayerChunkMap map = (PlayerChunkMap) pcm.get(world);

List<EntityPlayerMP> players = world.getPlayers(EntityPlayerMP.class, (p) -> true);

ImmutableSetMultimap<ChunkPos, ForgeChunkManager.Ticket> chunks = ForgeChunkManager.getPersistentChunksFor(world);
for(ChunkPos pos : chunks.keySet()) {
    for(EntityPlayerMP player : players) {
        map.getEntry(pos.x, pos.z).addPlayer(player);
    }
}

Basically I would add the player to every entry corresponding to the persistent chunks in the ForgeChunkManager. I'm not quite sure about where exactly it would make most sense to put this code.

[Cadiboo]

  On 4/8/2019 at 1:41 PM, deerangle said:

Field pcm = WorldServer.class.getDeclaredField("playerChunkMap");

pcm.setAccessible(true);

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Those are expensive operations, cache the result of them.

[deerangle]

  On 4/8/2019 at 1:42 PM, Cadiboo said:

Those are expensive operations, cache the result of them.

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I am very well aware of that. This code is just temporary. Once I get the concept to work, I'm going to optimize my code and cache that.

[Draco18s]

You might also want to look into the Looking Glass mod. I don't know if it has been updated recently (XCompWiz has been pretty busy), but you might be able to examine it to see how it works. 

 

The whole point of Looking Glass was to provide a mod-friendly way of being able to render views of any location in Minecraft, including other dimensions.