21两个高块作物

玉米块代码

public class CornCropBlock extends CropBlock {
    public static final int FIRST_STAGE_MAX_AGE = 7;
    public static final int SECOND_STAGE_MAX_AGE = 1;
    private static final VoxelShape[] AGE_TO_SHAPE = new VoxelShape[]{
            Block.createCuboidShape(0.0, 0.0, 0.0, 16.0, 2.0, 16.0),
            Block.createCuboidShape(0.0, 0.0, 0.0, 16.0, 4.0, 16.0),
            Block.createCuboidShape(0.0, 0.0, 0.0, 16.0, 6.0, 16.0),
            Block.createCuboidShape(0.0, 0.0, 0.0, 16.0, 8.0, 16.0),
            Block.createCuboidShape(0.0, 0.0, 0.0, 16.0, 10.0, 16.0),
            Block.createCuboidShape(0.0, 0.0, 0.0, 16.0, 12.0, 16.0),
            Block.createCuboidShape(0.0, 0.0, 0.0, 16.0, 14.0, 16.0),
            Block.createCuboidShape(0.0, 0.0, 0.0, 16.0, 16.0, 16.0),
            Block.createCuboidShape(0.0, 0.0, 0.0, 16.0, 16.0, 16.0)};

    public static final IntProperty AGE = IntProperty.of("age", 0, 8);

    public CornCropBlock(Settings settings) {
        super(settings);
    }

    @Override
    public VoxelShape getOutlineShape(BlockState state, BlockView world, BlockPos pos, ShapeContext context) {
        return AGE_TO_SHAPE[this.getAge(state)];
    }

    @Override
    public void randomTick(BlockState state, ServerWorld world, BlockPos pos, Random random) {
        if (world.getBaseLightLevel(pos, 0) >= 9) {
            int currentAge = this.getAge(state);
            if (currentAge < this.getMaxAge()) {
                float f = getAvailableMoisture(this, world, pos);
                if (random.nextInt((int)(25.0F / f) + 1) == 0) {
                    if(currentAge == FIRST_STAGE_MAX_AGE) {
                        if(world.getBlockState(pos.up(1)).isOf(Blocks.AIR)) {
                            world.setBlockState(pos.up(1), this.withAge(currentAge + 1), 2);
                        }
                    } else {
                        world.setBlockState(pos, this.withAge(currentAge + 1), 2);
                    }
                }
            }
        }
    }

    @Override
    public void applyGrowth(World world, BlockPos pos, BlockState state) {
        int nextAge = this.getAge(state) + this.getGrowthAmount(world);
        int maxAge = this.getMaxAge();
        if(nextAge > maxAge) {
            nextAge = maxAge;
        }

        if(this.getAge(state) == FIRST_STAGE_MAX_AGE && world.getBlockState(pos.up(1)).isOf(Blocks.AIR)) {
            world.setBlockState(pos.up(1), this.withAge(nextAge), 2);
        } else {
            world.setBlockState(pos, this.withAge(nextAge - 1), 2);
        }
    }

    @Override
    public boolean canPlaceAt(BlockState state, WorldView world, BlockPos pos) {
        return super.canPlaceAt(state, world, pos) || (world.getBlockState(pos.down(1)).isOf(this) &&
                world.getBlockState(pos.down(1)).get(AGE) == 7);
    }

    @Override
    public int getMaxAge() {
        return FIRST_STAGE_MAX_AGE + SECOND_STAGE_MAX_AGE;
    }

    @Override
    protected ItemConvertible getSeedsItem() {
        return ModItems.CORN_SEEDS;
    }

    @Override
    protected IntProperty getAgeProperty() {
        return AGE;
    }

    @Override
    protected void appendProperties(StateManager.Builder<Block, BlockState> builder) {
        builder.add(AGE);
    }
}

在ModBlocks中注册块

public static final Block CORN_CROP = Registry.register(Registries.BLOCK, new Identifier(TutorialMod.MOD_ID, "corn_crop"),
        new CornCropBlock(FabricBlockSettings.copyOf(Blocks.WHEAT)));

在ModItems中注册物品

public static final Item CORN_SEEDS = registerItem("corn_seeds",
        new AliasedBlockItem(ModBlocks.CORN_CROP, new FabricItemSettings()));
public static final Item CORN = registerItem("corn",
        new Item(new FabricItemSettings()));

在ModItemGroups中添加到物品组中

entries.add(ModItems.CORN_SEEDS);
entries.add(ModItems.CORN);

在TutorialModClient中，设

BlockRenderLayerMap.INSTANCE.putBlock(ModBlocks.CORN_CROP, RenderLayer.getCutout());

代码生成：

在ModLootTableProvider中：

AnyOfLootCondition.Builder builder2 =
        BlockStatePropertyLootCondition.builder(ModBlocks.CORN_CROP).properties(StatePredicate.Builder.create()
                        .exactMatch(CornCropBlock.AGE, 7))
                .or(BlockStatePropertyLootCondition.builder(ModBlocks.CORN_CROP).properties(StatePredicate.Builder.create()
                        .exactMatch(CornCropBlock.AGE, 8)));
addDrop(ModBlocks.CORN_CROP, cropDrops(ModBlocks.CORN_CROP, ModItems.CORN, ModItems.CORN_SEEDS, builder2));

在ModModelProvider中：

blockStateModelGenerator.registerCrop(ModBlocks.CORN_CROP, CornCropBlock.AGE, 0, 1, 2, 3, 4, 5, 6, 7, 8);

itemModelGenerator.register(ModItems.CORN, Models.GENERATED);

效果

玉米可以涨2格子高