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[1.7.10] Spawn custom mob in all biomes


AlekBardzo
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Ok, so as You probably noticed already, learing Forge makes a man bang his head against the wall quite often. To spare You that, I decided do describe what I found. I know one might find the answer through search on this humble forum, but if I had this problem, I'd rather find it in a nice single post detailing that particular situation.

 

And the issue is :

"I made a custom mode with a tutorial, and I want it to spawn in custom and moded biomes"

 

Presented solution works for 1.7.10 (yay, no erratas for 1.6.4/1.7.2 upgrades !) :

 

Go to the place in Your code where You register Your mob, like :

EntityRegistry.addSpawn(BrigandEntity.class, spawnRate, 2, 4, EnumCreatureType.monster, this.all_biomes);

 

All tutorials I've seen ask You to provide BiomeGenBase.SOMETHING as the last parameter of .addSpawn() , You may however pass an array of BiomeGenBase objects. It is important for this to be an array, not a ArrayList. You need to prepare it before, the solution that I've found to work :

ArrayList<BiomeGenBase> all_biomesList = new ArrayList<BiomeGenBase>();
	for( BiomeGenBase biome : BiomeGenBase.getBiomeGenArray() ) {
		if( biome != null ) {
			all_biomesList.add(biome);
			// here You may filter biomes which are You like by their properties and insert them in separate ArrayLists
		}
	}
	BiomeGenBase[] all_biomes_array = new BiomeGenBase[all_biomesList.size()]; // type casting from List to array
	all_biomes = all_biomesList.toArray(all_biomes_array);

and "all_biomes" will be Your passable array.

 

Mind You, You may further filter biomes within "if" loop, in order to create more specyfic list of biomes, and than convert it to array as well.

 

TIP: in earlier versions, field BiomeGenBase.biomesList was public, as of 1.7.10 it is not, it can be fetched with BiomeGenBase.getBiomeGenArray().

 

A living, breathing example (I sure love those in tutorials) :

public void register(int banditRate, int brigandRate, int tribesmanRate){	
	// prepare biomes lists
	// ArrayList<BiomeGenBase> all_biomesList = new ArrayList<BiomeGenBase>();
	ArrayList<BiomeGenBase> cold_biomesList = new ArrayList<BiomeGenBase>();
	ArrayList<BiomeGenBase> warmAndMedium_biomesList = new ArrayList<BiomeGenBase>();
	for( BiomeGenBase biome : BiomeGenBase.getBiomeGenArray() ) {
		if( biome != null ) {
			//all_biomesList.add(biome);					
			if(
					biome.getIntRainfall()>8000 && 
					biome.getTempCategory()!=TempCategory.OCEAN &&
					biome.heightVariation<0.5F){
				// hospitable biomes only
				if(biome.getTempCategory()==TempCategory.COLD){
					// cold biomes
					cold_biomesList.add(biome);
				}else{
					// medium and warm biomes
					warmAndMedium_biomesList.add(biome);
				}
			}
		}
	}
	//BiomeGenBase[] all_biomes_array = new BiomeGenBase[all_biomesList.size()]; // type casting from List to array and stuff
	//all_biomes = all_biomesList.toArray(all_biomes_array);

	BiomeGenBase[] cold_biomes_array = new BiomeGenBase[cold_biomesList.size()];		
	BiomeGenBase[] warmAndMedium_biomes_array = new BiomeGenBase[warmAndMedium_biomesList.size()];

	this.registerBrigand(brigandRate,warmAndMedium_biomesList.toArray(warmAndMedium_biomes_array));
	this.registerBandit(banditRate,warmAndMedium_biomesList.toArray(warmAndMedium_biomes_array));
	this.registerTribesman(tribesmanRate,cold_biomesList.toArray(cold_biomes_array));
}

 

EDIT:

Or... if You may acomplish the same quicker by using BiomeDictionary, like that :

// prepare biomes
	BiomeGenBase[] biomes = new BiomeGenBase[0];
	biomes = ArrayUtils.addAll(biomes, BiomeDictionary.getBiomesForType(Type.DENSE));
	biomes = ArrayUtils.addAll(biomes, BiomeDictionary.getBiomesForType(Type.FOREST));
	biomes = ArrayUtils.addAll(biomes, BiomeDictionary.getBiomesForType(Type.RIVER));
	EntityRegistry.addSpawn(BanditEntity.class, spawnRate, 2, 4, EnumCreatureType.monster, biomes);	

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I approved this for now, but please clean it up a bit.

Don't store the array in a field in your Mod it only takes up unnecessary memory.

Also: Take into consideration it might not always be desired to make your mob spawn literally everywhere. The BiomeDictionary allows you to get all biomes with a certain tag, which sounds more like what you want (You don't want your mob in the nether for example, do you?).

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Yay, approved, so perhaps me be bit smart, ya ? ;)

 

As for the stored array, I don't know much about Java, so it never occured to me that might be wasting memory, lesson learned, thanks :D

 

Wow, I was not even aware that BiomeDictionary even existed, its kinda awesome. It does make my method kinda pointless by rendering it obsolete though.

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