Hello i need help with world gen, i want my scructure to spawn on surface.

 

This is my current code and structure that i have spawning inside stone, i want to have my structure on surface ( grass ).

 

EDIT: FULL CODE

N/A

import static net.minecraftforge.common.ChestGenHooks.DUNGEON_CHEST;
import java.util.Random;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntityChest;
import net.minecraft.util.WeightedRandomChestContent;
import net.minecraft.world.World;
import net.minecraft.world.gen.feature.WorldGenerator;
import net.minecraftforge.common.ChestGenHooks;

public class WorldGenNA extends WorldGenerator
{

public boolean generate(World world, Random rand, int x, int y, int z)
{
if(world.getBlock(x, y, z) != Blocks.grass || world.getBlock(x + 5, y + 5, z + 5) != Blocks.grass || world.getBlock(x, y + 5, z + 5) != Blocks.grass|| world.getBlock(x + 5, y, z) != Blocks.grass)
{
return false;
}
world.setBlock(x + 0, y + 0, z + 0, Blocks.bedrock);
world.setBlock(x + 0, y + 0, z + 1, Blocks.bedrock);
world.setBlock(x + 0, y + 0, z + 2, Blocks.bedrock);
world.setBlock(x + 0, y + 0, z + 3, Blocks.bedrock);
world.setBlock(x + 0, y + 0, z + 4, Blocks.bedrock);
world.setBlock(x + 0, y + 1, z + 0, Blocks.bedrock);
world.setBlock(x + 0, y + 1, z + 1, Blocks.bedrock);
world.setBlock(x + 0, y + 1, z + 2, Blocks.bedrock);
world.setBlock(x + 0, y + 1, z + 3, Blocks.bedrock);
world.setBlock(x + 0, y + 1, z + 4, Blocks.bedrock);
world.setBlock(x + 0, y + 2, z + 0, Blocks.bedrock);
world.setBlock(x + 0, y + 2, z + 1, Blocks.bedrock);
world.setBlock(x + 0, y + 2, z + 2, Blocks.bedrock);
world.setBlock(x + 0, y + 2, z + 3, Blocks.bedrock);
world.setBlock(x + 0, y + 2, z + 4, Blocks.bedrock);
world.setBlock(x + 0, y + 3, z + 0, Blocks.bedrock);
world.setBlock(x + 0, y + 3, z + 1, Blocks.bedrock);
world.setBlock(x + 0, y + 3, z + 2, Blocks.bedrock);
world.setBlock(x + 0, y + 3, z + 3, Blocks.bedrock);
world.setBlock(x + 0, y + 3, z + 4, Blocks.bedrock);
world.setBlock(x + 1, y + 0, z + 0, Blocks.bedrock);
world.setBlock(x + 1, y + 0, z + 1, Blocks.bedrock);
world.setBlock(x + 1, y + 0, z + 2, Blocks.bedrock);
world.setBlock(x + 1, y + 0, z + 3, Blocks.bedrock);
world.setBlock(x + 1, y + 0, z + 4, Blocks.bedrock);
world.setBlock(x + 1, y + 1, z + 0, Blocks.bedrock);
world.setBlock(x + 1, y + 1, z + 4, Blocks.bedrock);
world.setBlock(x + 1, y + 2, z + 0, Blocks.bedrock);
world.setBlock(x + 1, y + 2, z + 4, Blocks.bedrock);
world.setBlock(x + 1, y + 3, z + 0, Blocks.bedrock);
world.setBlock(x + 1, y + 3, z + 1, Blocks.bedrock);
world.setBlock(x + 1, y + 3, z + 2, Blocks.bedrock);
world.setBlock(x + 1, y + 3, z + 3, Blocks.bedrock);
world.setBlock(x + 1, y + 3, z + 4, Blocks.bedrock);
world.setBlock(x + 2, y + 0, z + 0, Blocks.bedrock);
world.setBlock(x + 2, y + 0, z + 1, Blocks.bedrock);
world.setBlock(x + 2, y + 0, z + 2, Blocks.bedrock);
world.setBlock(x + 2, y + 0, z + 3, Blocks.bedrock);
world.setBlock(x + 2, y + 0, z + 4, Blocks.bedrock);
world.setBlock(x + 2, y + 1, z + 0, Blocks.bedrock);
world.setBlock(x + 2, y + 1, z + 4, Blocks.bedrock);
world.setBlock(x + 2, y + 2, z + 0, Blocks.bedrock);
world.setBlock(x + 2, y + 2, z + 4, Blocks.bedrock);
world.setBlock(x + 2, y + 3, z + 0, Blocks.bedrock);
world.setBlock(x + 2, y + 3, z + 1, Blocks.bedrock);
world.setBlock(x + 2, y + 3, z + 2, Blocks.bedrock);
world.setBlock(x + 2, y + 3, z + 3, Blocks.bedrock);
world.setBlock(x + 2, y + 3, z + 4, Blocks.bedrock);
return true;
}

 

 

EDIT:

This on top or if anyone knows if i can just make chests spawn around the world with custom items inside.

Or any other blocks to spawn around the world like trees.

ADDED EDIT:

More code please?

More code please?

 

added full code of the file.

 

Here is a ChunkProvider:

 

// NA
	if(rand.nextInt(15) == 0)
	{
	for(k1 = 0; k1 < 8; ++k1)
	{
	l1 = k + this.rand.nextInt(16) + 8;
	i2 = this.rand.nextInt(256);
	int j2 = l + this.rand.nextInt(16) + 8;
	(new WorldGenNA()).generate(this.worldObj, this.rand, l1, i2, j2);
	}
	}
	//

well, you are checking for stone. If you want it to spawn on grass... maybe check for grass?

 

Yeah i did that, and well it kinda doesnt spawn.

You are checking 5 blocks up and 5 blocks down. Imagine that... no minecraft world has grass at those positions. Grass is just the top layer.

 

So how would then that go, X Y Z. isnt "Z" for UP and DOWN ?! da hell, was i looking at google pictures.

 

if(world.getBlock(x, y, z) != Blocks.dirt || world.getBlock(x + 0, y + 0, z + 1) != Blocks.dirt || world.getBlock(x, y + 0, z + 1) != Blocks.dirt|| world.getBlock(x + 0, y, z) != Blocks.dirt)

Like this then ?!

You are checking 5 blocks up and 5 blocks down. Imagine that... no minecraft world has grass at those positions. Grass is just the top layer.

 

So how would then that go, X Y Z. isnt "Z" for UP and DOWN ?! da hell, was i looking at google pictures.

 

if(world.getBlock(x, y, z) != Blocks.dirt || world.getBlock(x + 0, y + 0, z + 1) != Blocks.dirt || world.getBlock(x, y + 0, z + 1) != Blocks.dirt|| world.getBlock(x + 0, y, z) != Blocks.dirt)

Like this then ?!

In Minecraft, the coordinate system is weird. X is for east/west, Y is for up/down and Z is for north/south.

You are checking 5 blocks up and 5 blocks down. Imagine that... no minecraft world has grass at those positions. Grass is just the top layer.

 

So how would then that go, X Y Z. isnt "Z" for UP and DOWN ?! da hell, was i looking at google pictures.

 

if(world.getBlock(x, y, z) != Blocks.dirt || world.getBlock(x + 0, y + 0, z + 1) != Blocks.dirt || world.getBlock(x, y + 0, z + 1) != Blocks.dirt|| world.getBlock(x + 0, y, z) != Blocks.dirt)

Like this then ?!

In Minecraft, the coordinate system is weird. X is for east/west, Y is for up/down and Z is for north/south.

 

So if i am not wrong then my code should be like this

5 block left 5 block right + 1 block high

Z - 5, X -5, Y -1

if(world.getBlock(x, y, z) != Blocks.grass || world.getBlock(x + 1, y + 1, z + 1) != Blocks.grass)

 

This is my code, and it spawns sometimes buts its odd. Is there any other code that checks if there is grass even if its one block and then it spawns building ?!

1. To get the topmost block during generation, use

world.getTopSolidOrLiquidBlock(x, z)

2. Please use descriptive names for your variables. Stuff like i2 or j1 is just confusing.

3. Ever considered using

for

loops instead of this chunk of repeating setBlock calls you have?