Two hight block of crop

Jefrygg · March 25

How to change a block model script so that the plant is two blocks high?

Plant model:

{
    "variants":
    {
        "age=0": { "model": "wof:cornbottom0" },
        "age=1": { "model": "wof:cornbottom1" },
        "age=2": { "model": "wof:cornbottom2" },
        "age=3": { "model": "wof:cornbottom3" },
        "age=4": { "model": "wof:cornbottom4" },
        "age=5": { "model": "wof:cornbottom5" },
        "age=6": { "model": "wof:cornbottom6" },
        "age=7": { "model": "wof:cornbottom7" }
    }
}

Plant script:

package com.jefrygg.worldofmod.crops;

import java.util.Collection;
import java.util.Random;

import com.google.common.base.Optional;
import com.jefrygg.worldofmod.init.ModBlocks;
import com.jefrygg.worldofmod.init.ModItems;

import net.minecraft.block.Block;
import net.minecraft.block.BlockBush;
import net.minecraft.block.IGrowable;
import net.minecraft.block.SoundType;
import net.minecraft.block.properties.IProperty;
import net.minecraft.block.properties.PropertyInteger;
import net.minecraft.block.state.BlockStateContainer;
import net.minecraft.block.state.IBlockState;
import net.minecraft.init.Blocks;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.MathHelper;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;

public class CornCrop extends BlockBush implements IGrowable
{
    public static final PropertyInteger AGE = PropertyInteger.create("age", 0, 7);
    private static final AxisAlignedBB[] CROPS_AABB = new AxisAlignedBB[] {new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.125D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.25D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.375D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.5D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.625D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.75D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.875D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 1.0D, 1.0D)};

    public CornCrop(String name)
    {
    	this.setUnlocalizedName(name);
    	this.setRegistryName(name);
        this.setDefaultState(this.blockState.getBaseState().withProperty(this.getAgeProperty(), Integer.valueOf(0)));
        this.setTickRandomly(true);
        this.setHardness(0.0F);
        this.setSoundType(SoundType.PLANT);
        this.disableStats();
        
        ModBlocks.BLOCKS.add(this);
    }

    public AxisAlignedBB getBoundingBox(IBlockState state, IBlockAccess source, BlockPos pos)
    {
        return CROPS_AABB[((Integer)state.getValue(this.getAgeProperty())).intValue()];
    }

    /**
     * Return true if the block can sustain a Bush
     */
    protected boolean canSustainBush(IBlockState state)
    {
        return state.getBlock() == Blocks.FARMLAND;
    }

    protected PropertyInteger getAgeProperty()
    {
        return AGE;
    }

    public int getMaxAge()
    {
        return 7;
    }

    protected int getAge(IBlockState state)
    {
        return ((Integer)state.getValue(this.getAgeProperty())).intValue();
    }

    public IBlockState withAge(int age)
    {
        return this.getDefaultState().withProperty(this.getAgeProperty(), Integer.valueOf(age));
    }

    public boolean isMaxAge(IBlockState state)
    {
        return ((Integer)state.getValue(this.getAgeProperty())).intValue() >= this.getMaxAge();
    }

    public void updateTick(World worldIn, BlockPos pos, IBlockState state, Random rand)
    {
        super.updateTick(worldIn, pos, state, rand);

        if (!worldIn.isAreaLoaded(pos, 1)) return; // Forge: prevent loading unloaded chunks when checking neighbor's light
        if (worldIn.getLightFromNeighbors(pos.up()) >= 9)
        {
            int i = this.getAge(state);

            if (i < this.getMaxAge())
            {
                float f = getGrowthChance(this, worldIn, pos);

                if(net.minecraftforge.common.ForgeHooks.onCropsGrowPre(worldIn, pos, state, rand.nextInt((int)(25.0F / f) + 1) == 0))
                {
                    worldIn.setBlockState(pos, this.withAge(i + 1), 2);
                    net.minecraftforge.common.ForgeHooks.onCropsGrowPost(worldIn, pos, state, worldIn.getBlockState(pos));
                }
            }
        }
    }

    public void grow(World worldIn, BlockPos pos, IBlockState state)
    {
        int i = this.getAge(state) + this.getBonemealAgeIncrease(worldIn);
        int j = this.getMaxAge();

        if (i > j)
        {
            i = j;
        }

        worldIn.setBlockState(pos, this.withAge(i), 2);
    }

    protected int getBonemealAgeIncrease(World worldIn)
    {
        return MathHelper.getInt(worldIn.rand, 2, 5);
    }

    protected static float getGrowthChance(Block blockIn, World worldIn, BlockPos pos)
    {
        float f = 1.0F;
        BlockPos blockpos = pos.down();

        for (int i = -1; i <= 1; ++i)
        {
            for (int j = -1; j <= 1; ++j)
            {
                float f1 = 0.0F;
                IBlockState iblockstate = worldIn.getBlockState(blockpos.add(i, 0, j));

                if (iblockstate.getBlock().canSustainPlant(iblockstate, worldIn, blockpos.add(i, 0, j), net.minecraft.util.EnumFacing.UP, (net.minecraftforge.common.IPlantable)blockIn))
                {
                    f1 = 1.0F;

                    if (iblockstate.getBlock().isFertile(worldIn, blockpos.add(i, 0, j)))
                    {
                        f1 = 3.0F;
                    }
                }

                if (i != 0 || j != 0)
                {
                    f1 /= 4.0F;
                }

                f += f1;
            }
        }

        BlockPos blockpos1 = pos.north();
        BlockPos blockpos2 = pos.south();
        BlockPos blockpos3 = pos.west();
        BlockPos blockpos4 = pos.east();
        boolean flag = blockIn == worldIn.getBlockState(blockpos3).getBlock() || blockIn == worldIn.getBlockState(blockpos4).getBlock();
        boolean flag1 = blockIn == worldIn.getBlockState(blockpos1).getBlock() || blockIn == worldIn.getBlockState(blockpos2).getBlock();

        if (flag && flag1)
        {
            f /= 2.0F;
        }
        else
        {
            boolean flag2 = blockIn == worldIn.getBlockState(blockpos3.north()).getBlock() || blockIn == worldIn.getBlockState(blockpos4.north()).getBlock() || blockIn == worldIn.getBlockState(blockpos4.south()).getBlock() || blockIn == worldIn.getBlockState(blockpos3.south()).getBlock();

            if (flag2)
            {
                f /= 2.0F;
            }
        }

        return f;
    }

    public boolean canBlockStay(World worldIn, BlockPos pos, IBlockState state)
    {
        IBlockState soil = worldIn.getBlockState(pos.down());
        return (worldIn.getLight(pos) >= 8 || worldIn.canSeeSky(pos)) && soil.getBlock().canSustainPlant(soil, worldIn, pos.down(), net.minecraft.util.EnumFacing.UP, this);
    }

    protected Item getSeed()
    {
        return ModItems.CORN_SEEDS;
    }

    protected Item getCrop()
    {
        return ModItems.CORN;
    }

    @Override
    public void getDrops(net.minecraft.util.NonNullList<ItemStack> drops, net.minecraft.world.IBlockAccess world, BlockPos pos, IBlockState state, int fortune)
    {
        super.getDrops(drops, world, pos, state, 0);
        int age = getAge(state);
        Random rand = world instanceof World ? ((World)world).rand : new Random();

        if (age >= getMaxAge())
        {
            int k = 3 + fortune;

            for (int i = 0; i < 3 + fortune; ++i)
            {
                if (rand.nextInt(2 * getMaxAge()) <= age)
                {
                    drops.add(new ItemStack(this.getSeed(), 1, 0));
                }
            }
        }
    }

    /**
     * Spawns this Block's drops into the World as EntityItems.
     */
    @SuppressWarnings("unused")
	public void dropBlockAsItemWithChance(World worldIn, BlockPos pos, IBlockState state, float chance, int fortune)
    {
        super.dropBlockAsItemWithChance(worldIn, pos, state, chance, fortune);

        if (false && !worldIn.isRemote) // Forge: NOP all this.
        {
            int i = this.getAge(state);

            if (i >= this.getMaxAge())
            {
                int j = 3 + fortune;

                for (int k = 0; k < j; ++k)
                {
                    if (worldIn.rand.nextInt(2 * this.getMaxAge()) <= i)
                    {
                        spawnAsEntity(worldIn, pos, new ItemStack(this.getSeed()));
                    }
                }
            }
        }
    }

    /**
     * Get the Item that this Block should drop when harvested.
     */
    public Item getItemDropped(IBlockState state, Random rand, int fortune)
    {
        return this.isMaxAge(state) ? this.getCrop() : this.getSeed();
    }

    public ItemStack getItem(World worldIn, BlockPos pos, IBlockState state)
    {
        return new ItemStack(this.getSeed());
    }

    /**
     * Whether this IGrowable can grow
     */
    public boolean canGrow(World worldIn, BlockPos pos, IBlockState state, boolean isClient)
    {
        return !this.isMaxAge(state);
    }

    public boolean canUseBonemeal(World worldIn, Random rand, BlockPos pos, IBlockState state)
    {
        return true;
    }

    public void grow(World worldIn, Random rand, BlockPos pos, IBlockState state)
    {
        this.grow(worldIn, pos, state);
    }

    /**
     * Convert the given metadata into a BlockState for this Block
     */
    public IBlockState getStateFromMeta(int meta)
    {
        return this.withAge(meta);
    }

    /**
     * Convert the BlockState into the correct metadata value
     */
    public int getMetaFromState(IBlockState state)
    {
        return this.getAge(state);
    }

    protected BlockStateContainer createBlockState()
    {
        return new BlockStateContainer(this, new IProperty[] {AGE});
    }
}

Edited March 25 by Jefrygg

_Bedrockbreaker_ · March 25

Try looking at the vanilla code for tall flowers or even the door. I'm sure those will provide enough information to be helpful. Their code shouldn't be specific to being a normal plant or door.

Jefrygg · March 25

First, how do I find vanilla codes and which block to look for?
Secondly, even if I find the code I need, how will I combine it with the CROP BLOCK code.

Ugdhar · March 25

4 hours ago, Jefrygg said:

First, how do I find vanilla codes and which block to look for?

Which IDE do you use? In Eclipse, it is usually the first item in Referenced Libraries. There's a jar for forge/minecraft, a jar for the launcher, and a client-extra jar that contains client stuff like models etc.

4 hours ago, Jefrygg said:

Secondly, even if I find the code I need, how will I combine it with the CROP BLOCK code.

You would just make your crop 2 blocks high or whatever in the same manner the vanilla crop does.

Draco18s · March 25

You're going to need to do some fiddling about, but its possible to do.

diesieben07 · March 25

Note that you cannot make a block 2 blocks high. The maximum space for a block is 1x1.5x1 (width x height x depth). You need two blocks if you want something two high, that is what vanilla does for doors, etc. as well.

Jefrygg · March 26

I tried to combine the "BlockTallGrass" script with my script, but it didn’t work.

BlockTallGrass script

[diesieben07: removed copyrighted mojang code]

how to combine it with this script

package com.jefrygg.worldofmod.crops;

import java.util.Collection;
import java.util.Random;

import com.google.common.base.Optional;
import com.jefrygg.worldofmod.init.ModBlocks;
import com.jefrygg.worldofmod.init.ModItems;

import net.minecraft.block.Block;
import net.minecraft.block.BlockBush;
import net.minecraft.block.IGrowable;
import net.minecraft.block.SoundType;
import net.minecraft.block.properties.IProperty;
import net.minecraft.block.properties.PropertyInteger;
import net.minecraft.block.state.BlockStateContainer;
import net.minecraft.block.state.IBlockState;
import net.minecraft.init.Blocks;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.MathHelper;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;

public class CornCrop extends BlockBush implements IGrowable
{
    public static final PropertyInteger AGE = PropertyInteger.create("age", 0, 7);
    private static final AxisAlignedBB[] CROPS_AABB = new AxisAlignedBB[] {new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.125D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.25D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.375D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.5D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.625D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.75D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 0.875D, 1.0D), new AxisAlignedBB(0.0D, 0.0D, 0.0D, 1.0D, 1.0D, 1.0D)};

    public CornCrop(String name)
    {
    	this.setUnlocalizedName(name);
    	this.setRegistryName(name);
        this.setDefaultState(this.blockState.getBaseState().withProperty(this.getAgeProperty(), Integer.valueOf(0)));
        this.setTickRandomly(true);
        this.setHardness(0.0F);
        this.setSoundType(SoundType.PLANT);
        this.disableStats();
        
        ModBlocks.BLOCKS.add(this);
    }

    public AxisAlignedBB getBoundingBox(IBlockState state, IBlockAccess source, BlockPos pos)
    {
        return CROPS_AABB[((Integer)state.getValue(this.getAgeProperty())).intValue()];
    }

    /**
     * Return true if the block can sustain a Bush
     */
    protected boolean canSustainBush(IBlockState state)
    {
        return state.getBlock() == Blocks.FARMLAND;
    }

    protected PropertyInteger getAgeProperty()
    {
        return AGE;
    }

    public int getMaxAge()
    {
        return 7;
    }

    protected int getAge(IBlockState state)
    {
        return ((Integer)state.getValue(this.getAgeProperty())).intValue();
    }

    public IBlockState withAge(int age)
    {
        return this.getDefaultState().withProperty(this.getAgeProperty(), Integer.valueOf(age));
    }

    public boolean isMaxAge(IBlockState state)
    {
        return ((Integer)state.getValue(this.getAgeProperty())).intValue() >= this.getMaxAge();
    }

    public void updateTick(World worldIn, BlockPos pos, IBlockState state, Random rand)
    {
        super.updateTick(worldIn, pos, state, rand);

        if (!worldIn.isAreaLoaded(pos, 1)) return; // Forge: prevent loading unloaded chunks when checking neighbor's light
        if (worldIn.getLightFromNeighbors(pos.up()) >= 9)
        {
            int i = this.getAge(state);

            if (i < this.getMaxAge())
            {
                float f = getGrowthChance(this, worldIn, pos);

                if(net.minecraftforge.common.ForgeHooks.onCropsGrowPre(worldIn, pos, state, rand.nextInt((int)(25.0F / f) + 1) == 0))
                {
                    worldIn.setBlockState(pos, this.withAge(i + 1), 2);
                    net.minecraftforge.common.ForgeHooks.onCropsGrowPost(worldIn, pos, state, worldIn.getBlockState(pos));
                }
            }
        }
    }

    public void grow(World worldIn, BlockPos pos, IBlockState state)
    {
        int i = this.getAge(state) + this.getBonemealAgeIncrease(worldIn);
        int j = this.getMaxAge();

        if (i > j)
        {
            i = j;
        }

        worldIn.setBlockState(pos, this.withAge(i), 2);
    }

    protected int getBonemealAgeIncrease(World worldIn)
    {
        return MathHelper.getInt(worldIn.rand, 2, 5);
    }

    protected static float getGrowthChance(Block blockIn, World worldIn, BlockPos pos)
    {
        float f = 1.0F;
        BlockPos blockpos = pos.down();

        for (int i = -1; i <= 1; ++i)
        {
            for (int j = -1; j <= 1; ++j)
            {
                float f1 = 0.0F;
                IBlockState iblockstate = worldIn.getBlockState(blockpos.add(i, 0, j));

                if (iblockstate.getBlock().canSustainPlant(iblockstate, worldIn, blockpos.add(i, 0, j), net.minecraft.util.EnumFacing.UP, (net.minecraftforge.common.IPlantable)blockIn))
                {
                    f1 = 1.0F;

                    if (iblockstate.getBlock().isFertile(worldIn, blockpos.add(i, 0, j)))
                    {
                        f1 = 3.0F;
                    }
                }

                if (i != 0 || j != 0)
                {
                    f1 /= 4.0F;
                }

                f += f1;
            }
        }

        BlockPos blockpos1 = pos.north();
        BlockPos blockpos2 = pos.south();
        BlockPos blockpos3 = pos.west();
        BlockPos blockpos4 = pos.east();
        boolean flag = blockIn == worldIn.getBlockState(blockpos3).getBlock() || blockIn == worldIn.getBlockState(blockpos4).getBlock();
        boolean flag1 = blockIn == worldIn.getBlockState(blockpos1).getBlock() || blockIn == worldIn.getBlockState(blockpos2).getBlock();

        if (flag && flag1)
        {
            f /= 2.0F;
        }
        else
        {
            boolean flag2 = blockIn == worldIn.getBlockState(blockpos3.north()).getBlock() || blockIn == worldIn.getBlockState(blockpos4.north()).getBlock() || blockIn == worldIn.getBlockState(blockpos4.south()).getBlock() || blockIn == worldIn.getBlockState(blockpos3.south()).getBlock();

            if (flag2)
            {
                f /= 2.0F;
            }
        }

        return f;
    }

    public boolean canBlockStay(World worldIn, BlockPos pos, IBlockState state)
    {
        IBlockState soil = worldIn.getBlockState(pos.down());
        return (worldIn.getLight(pos) >= 8 || worldIn.canSeeSky(pos)) && soil.getBlock().canSustainPlant(soil, worldIn, pos.down(), net.minecraft.util.EnumFacing.UP, this);
    }

    protected Item getSeed()
    {
        return ModItems.CORN_SEEDS;
    }

    protected Item getCrop()
    {
        return ModItems.CORN;
    }

    @Override
    public void getDrops(net.minecraft.util.NonNullList<ItemStack> drops, net.minecraft.world.IBlockAccess world, BlockPos pos, IBlockState state, int fortune)
    {
        super.getDrops(drops, world, pos, state, 0);
        int age = getAge(state);
        Random rand = world instanceof World ? ((World)world).rand : new Random();

        if (age >= getMaxAge())
        {
            int k = 3 + fortune;

            for (int i = 0; i < 3 + fortune; ++i)
            {
                if (rand.nextInt(2 * getMaxAge()) <= age)
                {
                    drops.add(new ItemStack(this.getSeed(), 1, 0));
                }
            }
        }
    }

    /**
     * Spawns this Block's drops into the World as EntityItems.
     */
    @SuppressWarnings("unused")
	public void dropBlockAsItemWithChance(World worldIn, BlockPos pos, IBlockState state, float chance, int fortune)
    {
        super.dropBlockAsItemWithChance(worldIn, pos, state, chance, fortune);

        if (false && !worldIn.isRemote) // Forge: NOP all this.
        {
            int i = this.getAge(state);

            if (i >= this.getMaxAge())
            {
                int j = 3 + fortune;

                for (int k = 0; k < j; ++k)
                {
                    if (worldIn.rand.nextInt(2 * this.getMaxAge()) <= i)
                    {
                        spawnAsEntity(worldIn, pos, new ItemStack(this.getSeed()));
                    }
                }
            }
        }
    }

    /**
     * Get the Item that this Block should drop when harvested.
     */
    public Item getItemDropped(IBlockState state, Random rand, int fortune)
    {
        return this.isMaxAge(state) ? this.getCrop() : this.getSeed();
    }

    public ItemStack getItem(World worldIn, BlockPos pos, IBlockState state)
    {
        return new ItemStack(this.getSeed());
    }

    /**
     * Whether this IGrowable can grow
     */
    public boolean canGrow(World worldIn, BlockPos pos, IBlockState state, boolean isClient)
    {
        return !this.isMaxAge(state);
    }

    public boolean canUseBonemeal(World worldIn, Random rand, BlockPos pos, IBlockState state)
    {
        return true;
    }

    public void grow(World worldIn, Random rand, BlockPos pos, IBlockState state)
    {
        this.grow(worldIn, pos, state);
    }

    /**
     * Convert the given metadata into a BlockState for this Block
     */
    public IBlockState getStateFromMeta(int meta)
    {
        return this.withAge(meta);
    }

    /**
     * Convert the BlockState into the correct metadata value
     */
    public int getMetaFromState(IBlockState state)
    {
        return this.getAge(state);
    }

    protected BlockStateContainer createBlockState()
    {
        return new BlockStateContainer(this, new IProperty[] {AGE});
    }
}

Draco18s · March 26

6 hours ago, Jefrygg said:

protected boolean canSustainBush(IBlockState state)
{
return state.getBlock() == Blocks.FARMLAND;
}

What does the upper half of your block sit on top of? Is it farmland?

6 hours ago, Jefrygg said:

float f = getGrowthChance(this, worldIn, pos);

When your crop grows, I don't see it doing anything about setting an upper block.

6 hours ago, Jefrygg said:

protected BlockStateContainer createBlockState()
{
return new BlockStateContainer(this, new IProperty[] {AGE});
}

I don't see anything about the block knowing if its an upper or lower block.

6 hours ago, Jefrygg said:

BlockTallGrass

This is not the two-tall grass block class. This is the one-block grass block class (called "tall grass" because it isn't the grass block that has a green top face and dirt bottom face), which is why:

6 hours ago, Jefrygg said:

BlockTallGrass.EnumType.DEAD_BUSH

That enum exists. Two tall grass cannot and never is "dead bush."

Edited March 26 by Draco18s

Jefrygg · March 27

13 hours ago, Draco18s said:

19 hours ago, Jefrygg said:

protected boolean canSustainBush(IBlockState state)
{
return state.getBlock() == Blocks.FARMLAND;
}

What does the upper half of your block sit on top of? Is it farmland?

This is the condition under which the plant will grow under the farmland block.

13 hours ago, Draco18s said:

19 hours ago, Jefrygg said:

BlockTallGrass

This is not the two-tall grass block class. This is the one-block grass block class (called "tall grass" because it isn't the grass block that has a green top face and dirt bottom face), which is why:

There are no objections. I will look for another. If you know where the tall grass script is, let me know.

13 hours ago, Draco18s said:

19 hours ago, Jefrygg said:

protected BlockStateContainer createBlockState()
{
return new BlockStateContainer(this, new IProperty[] {AGE});
}

I don't see anything about the block knowing if its an upper or lower block.

This indicates the age of the plant and not the growth of the plant.

Edited March 27 by Jefrygg

Draco18s · March 27

26 minutes ago, Jefrygg said:

This indicates the age of the plant and not the growth of the plant.

You still need two functional blocks. A top half and a bottom half and you don't have two halves!

Jefrygg · March 27

2 minutes ago, Draco18s said:

You still need two functional blocks. A top half and a bottom half and you don't have two halves!

So I don’t know how to do it yet.

Draco18s · March 27

On 3/25/2020 at 9:12 AM, diesieben07 said:

You need two blocks if you want something two high, that is what vanilla does for doors, etc. as well.

On 3/25/2020 at 12:31 AM, _Bedrockbreaker_ said:

Try looking at the vanilla code for tall flowers or even the door.

Jefrygg · March 29

[diesieben07: removed copyrighted Mojang code for BlockDoublePlant]

Well, I can only find this.

How can I combine it with the crop script.

Edited March 29 by diesieben07

Ugdhar · March 29

4 hours ago, Jefrygg said:

How can I combine it with the crop script.

It's not simply a matter of combining "scripts". You need to see and understand how vanilla minecraft makes a block "be 2 blocks tall", which is really *2* blocks, and when it grows, the bottom block checks if it has the top block, if not, it adds it when it grows.

Since it has not been asked, it's up to me: Do you know Java? How much programming experience do you have?

I can tell you that without some programming and/or Java experience, you will not have a good time trying to make a mod.

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Two hight block of crop

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