[1.7.10] Looking for some Tutorial on how to "Override" Vanilla World Gen

[American2050]

Does anyone know of some Tutorial on how to Override Vanilla World Generation, like to disable stuff, like for example Mineshaft or Strongholds and things like that?

 

Thanks a lot.

[Choonster]

To completely disable a specific type of structure generation:

 

Create a class that extends the appropriate

MapGen

class (e.g.

MapGenStrongholds

) and overrides

canSpawnStructureAtCoords

to return

false

. Subscribe to

InitMapGenEvent

, check for the appropriate

EventType

and assign a new instance of your class to the

newGen

field. This replaces the default generator with one that does nothing.

[American2050]

To completely disable a specific type of structure generation:

 

Create a class that extends the appropriate

MapGen

class (e.g.

MapGenStrongholds

) and overrides

canSpawnStructureAtCoords

to return

false

. Subscribe to

InitMapGenEvent

, check for the appropriate

EventType

and assign a new instance of your class to the

newGen

field. This replaces the default generator with one that does nothing.

 

Thanks Choonster, yes I finally found something, and I kinda made what you saying, what I'm not sure about is how to make the Event thing. I'm gonna do some tests and see how it goes, but I already made a custom ChunkProvider and also made my own MapGenStronghold and StructureStrongholdPieces

 

I'll play around with my EventHandler and see what to do there

[Choonster]

Are you creating your own dimension or modifying the Overworld? If it's your own dimension, just don't generate the structures in the first place.

 

coolAlias has a tutorial on event handling here. Jabelar has a tutorial here.

[American2050]

At this point, I would call me happy just by removing the End Portal Frames on the Strongholds Portal Rooms.

 

Reading around I found this post http://www.minecraftforge.net/forum/index.php/topic,21625.0.html Where I implement that and register it on the PopulateChunkEvent.Pre

 

@SubscribeEvent(priority=EventPriority.NORMAL, receiveCanceled=true)
public void onEvent(PopulateChunkEvent.Pre event)
{     
    Chunk chunk = event.world.getChunkFromChunkCoords(event.chunkX, event.chunkZ);
    Block fromBlock = Blocks.end_portal_frame; // change this to suit your need
    Block toBlock = Blocks.air; // change this to suit your need

    for (ExtendedBlockStorage storage : chunk.getBlockStorageArray())

    {
        if (storage != null)
        {
            for (int x = 0; x < 16; ++x)
            {
                for (int y = 0; y < 16; ++y)
                {
                    for (int z = 0; z < 16; ++z)
                    {
                        if (storage.getBlockByExtId(x, y, z) == fromBlock)
                        {
                            storage.func_150818_a(x, y, z, toBlock);
                        }
                    }
                }
            }
        }
    }

    chunk.isModified = true; // this is important as it marks it to be saved
}

 

Problem is that it doesn't work correctly, it does replace the End Portal Frames with air, but not all of them I did several tests and it replaced 9 in one seed leaving a row of 3 and in another test with different seed it replaced only 7.

 

I think the example they provide here was to replace "Ores" and maybe to replace End Portal Frames I have to run this in another event?

 

Back to your question. Yes I was to modify Overworld.

 

I have this Event registered on main mod class

 

    @EventHandler
    public void init(FMLInitializationEvent event)
    {
    	//EVENTS
    	MinecraftForge.EVENT_BUS.register(new WGMEventHandler());
    }

 

WGMEventHandler (I think my error is here on that if statement)

    @SubscribeEvent
    public void initMapGenEvent(InitMapGenEvent event)
    {
    	if(event.type == EventType.STRONGHOLD )
    	{
    		event.newGen = new CustomMapGenStronghold();
    	}
    	
    }

 

And on CustomMapGenStronghold

 

public class CustomMapGenStronghold extends MapGenStronghold
{
@Override
    public boolean canSpawnStructureAtCoords(int p_75047_1_, int p_75047_2_)
    {
    	
    	return false;
    	
    }

}

 

Thanks for the links, gonna take a lok at those

[American2050]

At this point, I would call me happy just by removing the End Portal Frames on the Strongholds Portal Rooms.

 

Reading around I found this post http://www.minecraftforge.net/forum/index.php/topic,21625.0.html Where I implement that and register it on the PopulateChunkEvent.Pre

 

@SubscribeEvent(priority=EventPriority.NORMAL, receiveCanceled=true)
public void onEvent(PopulateChunkEvent.Pre event)
{     
    Chunk chunk = event.world.getChunkFromChunkCoords(event.chunkX, event.chunkZ);
    Block fromBlock = Blocks.end_portal_frame; // change this to suit your need
    Block toBlock = Blocks.air; // change this to suit your need

    for (ExtendedBlockStorage storage : chunk.getBlockStorageArray())

    {
        if (storage != null)
        {
            for (int x = 0; x < 16; ++x)
            {
                for (int y = 0; y < 16; ++y)
                {
                    for (int z = 0; z < 16; ++z)
                    {
                        if (storage.getBlockByExtId(x, y, z) == fromBlock)
                        {
                            storage.func_150818_a(x, y, z, toBlock);
                        }
                    }
                }
            }
        }
    }

    chunk.isModified = true; // this is important as it marks it to be saved
}

 

Problem is that it doesn't work correctly, it does replace the End Portal Frames with air, but not all of them I did several tests and it replaced 9 in one seed leaving a row of 3 and in another test with different seed it replaced only 7.

 

I think the example they provide here was to replace "Ores" and maybe to replace End Portal Frames I have to run this in another event?

 

Does anyone know if the problem of this code replacing only the End Frame Portals "randomly" I mean, not all of them, is related to the Event I'm attaching this into, or is there any other problem here?