I have based my custom tree off of the spruce tree but, when I bonemeal it to make it grow, the trunk is only 1 block high (with random 1 more) and, the leaves generate as they should. Just no trunk to the top of the tree.

Tree Class

Spoiler

public class BlackSpruceTree extends SpruceTree
{
	public static final TreeFeatureConfig BLACKSPRUCE_TREE_CONFIG = (new TreeFeatureConfig.Builder(
			new SimpleBlockStateProvider(BlockInit.blackspruce_log.get().getDefaultState()), 
			new SimpleBlockStateProvider(BlockInit.blackspruce_leaves.get().getDefaultState()), 
			new SpruceFoliagePlacer(2, 1))).baseHeight(8).heightRandA(4).trunkHeight(1).trunkHeightRandom(1).trunkTopOffsetRandom(2).ignoreVines()
				.setSapling((IPlantable)BlockInit.blackspruce_sapling.get()).build();
	
	@Override
	protected ConfiguredFeature<TreeFeatureConfig, ?> getTreeFeature(Random randomIn, boolean booleanIn)
	{
		return Feature.NORMAL_TREE.withConfiguration(BLACKSPRUCE_TREE_CONFIG);
	}
}

 

Sapling Class
 

Spoiler

public class CasWillorSaplingBlock extends BushBlock implements IGrowable
{
	public static final IntegerProperty STAGE = BlockStateProperties.STAGE_0_1;
	protected static final VoxelShape SHAPE = Block.makeCuboidShape(2.0D, 0.0D, 2.0D, 14.0D, 12.0D, 14.0D);
	private final Supplier<Tree> tree;
	
	public CasWillorSaplingBlock(Supplier<Tree> treeIn, Properties properties) 
	{
		super(properties);
		this.tree = treeIn;
		this.setDefaultState(this.stateContainer.getBaseState().with(STAGE, Integer.valueOf(0)));
	}
	
	@Override
	public VoxelShape getShape(BlockState state, IBlockReader worldIn, BlockPos pos, ISelectionContext context)
	{
		return SHAPE;
	}
	
	@SuppressWarnings("deprecation")
	@Override
	public void tick(BlockState state, ServerWorld worldIn, BlockPos pos, Random rand)
	{
		super.tick(state, worldIn, pos, rand);
		if(!worldIn.isAreaLoaded(pos, 1)) return;
		
		if(worldIn.getLight(pos.up()) >= 9 && rand.nextInt(7) == 0)
		{
			this.grow(worldIn, pos, state, rand);
		}
	}
	
	public void grow(ServerWorld serverWorld, BlockPos pos, BlockState state, Random rand)
	{
		if(state.get(STAGE) == 0)
		{
			serverWorld.setBlockState(pos, state.cycle(STAGE), 4);
		}
		else
		{
			if(!ForgeEventFactory.saplingGrowTree(serverWorld, rand, pos)) return;
			this.tree.get().func_225545_a_(serverWorld, serverWorld.getChunkProvider().getChunkGenerator(), pos, state, rand);
		}
	}
	
	@Override
	public void grow(ServerWorld serverWorld, Random rand, BlockPos pos, BlockState state)
	{
		this.grow(serverWorld, pos, state, rand);
	}
	
	@Override
	public boolean canGrow(IBlockReader worldIn, BlockPos pos, BlockState state, boolean isClient)
	{
		return true;
	}
	
	@Override
	public boolean canUseBonemeal(World worldIn, Random rand, BlockPos pos, BlockState state)
	{
		return (double)worldIn.rand.nextFloat() < 0.45D;
	}
	
	@Override
	protected void fillStateContainer(Builder<Block, BlockState> builder)
	{
		builder.add(STAGE);
	}
}

 

 

Edited April 1, 20205 yr by MadHatAK
Forge Version in Title, solved Issue

10 hours ago, MadHatAK said:

trunkHeight(1).trunkHeightRandom(1)

That right there is probably doing it.

Edited April 1, 20205 yr by Ugdhar

No, it just tells the leaves how far above ground level to generate.
 

I did figure this out. Overriding the leaves, and logs, tag in resources/data/minecraft/tags/blocks solves this issue.

Spoiler

{
  "replace": false,
  "values": [
    "minecraft:jungle_leaves",
    "minecraft:oak_leaves",
    "minecraft:spruce_leaves",
    "minecraft:dark_oak_leaves",
    "minecraft:acacia_leaves",
    "minecraft:birch_leaves",
    "yourmodid:your_leaves"
    
  ]
}

 

Do the same for your logs.