[MC 1.10.2] World Generator is not doing any despite being called

Komodo2013 · October 12, 2016

I've created a world generator, successfully registered it, and it is being called (as is evidence as the system log shows the print lines). Despite this, the generator itself is not working.

Code:

public class BettermentsWorldGenerator implements IWorldGenerator{

@Override
public void generate(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {
	int dim = world.provider.getDimension();
	//System.out.printf("Betterments mod now loading for dimension %s", dim);
	if(dim == 0) {generateOverworld(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
	else if(dim == 1) {generateEnd(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
	else if(dim == -1) {generateNether(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
}

private void generateNether(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {

}

private void generateEnd(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {

}

private void generateOverworld(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {
	BlockPos pos = new BlockPos(chunkX * 16, 70, chunkZ * 16);
	String s = world.getBiomeGenForCoords(pos).getBiomeName();
	System.out.println(s);

	//Vanilla minecraft addition
	generate(Blocks.IRON_ORE.getDefaultState(), world, random, chunkX, chunkZ, 1, 128, 32, 10, Blocks.STONE);

	//Biome specific spawns
	if(s.contains("Desert")) {
		generate(Blocks.EMERALD_ORE.getDefaultState(), world, random, chunkX, chunkZ, 1, 64, 16, 1, Blocks.STONE);
	}
	generate(BettermentsBlocks.marble.getDefaultState(), world, random, chunkX, chunkZ, 1, 128, 64, 3, Blocks.STONE);

}

private void generate(IBlockState block, World world, Random random, int x, int z, int minY, int maxY, int size, int tries, Block inside){
	int dy = maxY - minY;
	if (minY < 0 || maxY  > 256 || dy < 0) {
		throw new IllegalArgumentException("Illegal Height Arguments for WorldGenerator");
	}
	for (int i = 0; i<tries; i++){
		x = x + random.nextInt(16);
		z = z + random.nextInt(16);
		int y = minY + random.nextInt(dy);


		if(y==0){y=1;}
		BlockPos pos = new BlockPos(x, y, z);

		WorldGenMinable generator = new WorldGenMinable(block, size, BlockMatcher.forBlock(inside));
		generator.generate(world, random, pos);
		//System.out.println("Betterments World Generator called.");
	}
}

}

Komodo2013 · October 12, 2016

*Face palm*

Implemented that change:

public class BettermentsWorldGenerator implements IWorldGenerator{

@Override
public void generate(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {
	int dim = world.provider.getDimension();
	//System.out.printf("Betterments mod now loading for dimension %s", dim);
	if(dim == 0) {generateOverworld(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
	else if(dim == 1) {generateEnd(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
	else if(dim == -1) {generateNether(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
}

private void generateNether(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {

}

private void generateEnd(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {

}

private void generateOverworld(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {
	BlockPos pos = new BlockPos(chunkX * 16, 70, chunkZ * 16);
	String s = world.getBiomeGenForCoords(pos).getBiomeName();
	System.out.println(s);

	//Vanilla minecraft addition
	generate(Blocks.IRON_ORE.getDefaultState(), world, random, chunkX, chunkZ, 1, 128, 32, 10, Blocks.STONE);

	//Biome specific spawns
	if(s.contains("Desert")) {
		generate(Blocks.EMERALD_ORE.getDefaultState(), world, random, chunkX, chunkZ, 1, 64, 16, 1, Blocks.STONE);
	}
	generate(BettermentsBlocks.marble.getDefaultState(), world, random, chunkX, chunkZ, 1, 128, 64, 3, Blocks.STONE);
}

private void generate(IBlockState block, World world, Random random, int x, int z, int minY, int maxY, int size, int tries, Block inside){
	int cx = x >> 4;
	int cz = z >> 4;

	int dy = maxY - minY;
	if (minY < 0 || maxY  > 256 || dy < 0) {
		throw new IllegalArgumentException("Illegal Height Arguments for WorldGenerator");
	}
	for (int i = 0; i<tries; i++){
		x = x + random.nextInt(16);
		z = z + random.nextInt(16);
		int y = minY + random.nextInt(dy);


		if(y==0){y=1;}
		BlockPos pos = new BlockPos(cx, y, cz);

		WorldGenMinable generator = new WorldGenMinable(block, size, BlockMatcher.forBlock(inside));
		generator.generate(world, random, pos);
		//System.out.println("Betterments World Generator called.");
	}
}

}

But it still doesn't do anything.

Komodo2013 · October 12, 2016

Modified again, but still isn't working. If I shift the bits the other way, then it crashes.

public class BettermentsWorldGenerator implements IWorldGenerator{

@Override
public void generate(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {
	int dim = world.provider.getDimension();
	//System.out.printf("Betterments mod now loading for dimension %s", dim);
	if(dim == 0) {generateOverworld(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
	else if(dim == 1) {generateEnd(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
	else if(dim == -1) {generateNether(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
}

private void generateNether(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {

}

private void generateEnd(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {

}

private void generateOverworld(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {
	int cx = chunkX >> 4;
	int cz = chunkZ >> 4;

	BlockPos pos = new BlockPos(cx, 70, cz);
	String s = world.getBiomeGenForCoords(pos).getBiomeName();
	System.out.println(s);

	//Vanilla minecraft addition
	generate(Blocks.IRON_ORE.getDefaultState(), world, random, cx, cz, 1, 128, 32, 10, Blocks.STONE);

	//Biome specific spawns
	if(s.contains("Desert")) {
		generate(Blocks.EMERALD_ORE.getDefaultState(), world, random, cx, cz, 1, 64, 16, 1, Blocks.STONE);
	}
	generate(BettermentsBlocks.marble.getDefaultState(), world, random, cx, cz, 1, 128, 64, 3, Blocks.STONE);
}

private void generate(IBlockState block, World world, Random random, int cx, int cz, int minY, int maxY, int size, int tries, Block inside){

	int dy = maxY - minY;
	if (minY < 0 || maxY  > 256 || dy < 0) {
		throw new IllegalArgumentException("Illegal Height Arguments for WorldGenerator");
	}
	for (int i = 0; i<tries; i++){
		cx = cx + random.nextInt(16);
		cz = cz + random.nextInt(16);
		int y = minY + random.nextInt(dy);


		if(y==0){y=1;}
		BlockPos pos = new BlockPos(cx, y, cz);

		WorldGenMinable generator = new WorldGenMinable(block, size, BlockMatcher.forBlock(inside));
		generator.generate(world, random, pos);
		//System.out.println("Betterments World Generator called.");
	}
}

}

Draco18s · October 12, 2016

Posting the crash helps.

Komodo2013 · October 12, 2016

Alright, here it is: http://pastebin.com/NANALuAG

jeffryfisher · October 13, 2016

First, it looks as if you have some very deep recursion (the stack is repetitive). Look at those calls and see if you're calling in a circle by accident.

Second, a NoClassDefFoundError often means that the server is attempting to use a client-side only class. It can aslo mean that you attempted to use reflection, but you forgot to load a class before invoking it.

Set a break point upstream of the error and run again to look at what's trying to do what with what values.

Komodo2013 · October 13, 2016

Alright, I got my code to work perfectly. I didn't realize that I had two "generate" functions , so I fixed that, but it still didn't fix the error. For some reason, the game did not like using the block coordinates using the bit shift, but it is working just fine by simply multiplying them by 16. Anyway, here is my working code, which also has the working biome specific generation:

public class BettermentsWorldGenerator implements IWorldGenerator{

@Override
public void generate(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {
	int dim = world.provider.getDimension();
	//System.out.printf("Betterments mod now loading for dimension %s", dim);
	if(dim == 0) {generateOverworld(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
	else if(dim == 1) {generateEnd(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
	else if(dim == -1) {generateNether(random, chunkX, chunkZ, world, chunkGenerator, chunkProvider);}
}

private void generateNether(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {

}

private void generateEnd(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {

}

private void generateOverworld(Random random, int chunkX, int chunkZ, World world, IChunkGenerator chunkGenerator, IChunkProvider chunkProvider) {

	int cx = chunkX << 4;
	int cz = chunkZ << 4;
	BlockPos pos = new BlockPos(cx, 70, cz);
	String s = world.getBiomeGenForCoords(pos).getBiomeName();
	System.out.println(s);

	//Vanilla minecraft addition
	generateSeam(Blocks.IRON_ORE.getDefaultState(), world, random, chunkX*16, chunkZ*16, 1, 128, 32, 10, Blocks.STONE);

	//Biome specific spawns
	if(s.contains("Desert")) {
		generateSeam(Blocks.EMERALD_ORE.getDefaultState(), world, random, cx, cz, 1, 64, 16, 1, Blocks.STONE);
	}
	generateSeam(BettermentsBlocks.marble.getDefaultState(), world, random, cx, cz, 1, 128, 64, 3, Blocks.STONE);
}

private void generateSeam(IBlockState block, World world, Random random, int cx, int cz, int minY, int maxY, int size, int tries, Block inside){

	int dy = maxY - minY;
	if (minY < 0 || maxY  > 256 || dy < 0) {
		throw new IllegalArgumentException("Illegal Height Arguments for WorldGenerator");
	}

	for (int i = 0; i<tries; i++){
		int rx = cx + random.nextInt(15);
		int rz = cz + random.nextInt(15);
		int y = minY + random.nextInt(dy);
		//System.out.println(tries - i);

		if(y==0){y=1;}
		BlockPos pos = new BlockPos(rx, y, rz);

		WorldGenMinable generator = new WorldGenMinable(block, size, BlockMatcher.forBlock(inside));
		generator.generate(world, random, pos);
		//System.out.println("Betterments World Generator called.");
	}
}

}

*Edit: Apparently I need to work on noticing my variables, but I now see that I latter use the bit shifted coordinates, and it was still working fine. I don't understand what fixed the crashes that were still occurring after I fixed my duplicate functions.

Draco18s · October 13, 2016

x >> 4 is division.

x << 4 is multiplication.

Komodo2013 · October 13, 2016

x >> 4 is division.

x << 4 is multiplication.

Yes, I realized I had made that mistake before. But you can see from my code that I've fixed it, and I still had it crash, I'm having difficulty trying to get it to crash again, so I can post the error report, but this is a good problem.

Perhaps it simply decided to stop giving me grief?

Draco18s · October 13, 2016

By the way, why are you using "chunkx*16" in one place, but "cx" in the others?

Komodo2013 · October 13, 2016

By the way, why are you using "chunkx*16" in one place, but "cx" in the others?

Since I changed the infinite loop, and still had it crash, I thought that cx, which obtains its value from the bit shift, was the problem. (The best tutorial I could find used chunkx*16 method of finding the cords, and his worked). What you didn't see was the version were I changed all cx to chunkx*16 or commented them out. Once it started to work, I uncommented the references to cx, and simply haven't changed chunkx*16 to cx as this generator is a dummy generator, and thus I will be altering a different generator class.

(I removed the actual generator out of the package so its presence didn't affect anything)

jeffryfisher · October 14, 2016

Don't worry about writing the shifts in your source code. Any optimizer worth the name will replace your "*16" subexpressions with shifts at the assembly level anyway. That liberates you to write what you mean yet enjoy the speed of fast machine execution

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[MC 1.10.2] World Generator is not doing any despite being called

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