Worldgeneration with schematic files[1.7.10]

Posted July 8, 201411 yr

Hello modders,

I need help with my mod. Can you read schematic files and generate them randomly in the world without converting schematic to java code ? Maybe it is good to read the schematic file into bytes and then set arrays or HashMaps ? Or best with inputStream? And how would you do it ? If you have an idea and a code for the beginning please help me. Thank you.

Quote

July 8, 201411 yr

public Schematic get(String schemname){
        try {
            InputStream is = this.getClass().getClassLoader().getResourceAsStream("assets/mymod/schem/"+schemname);
            NBTTagCompound nbtdata = CompressedStreamTools.readCompressed(is);
            short width = nbtdata.getShort("Width");
            short height = nbtdata.getShort("Height");
            short length = nbtdata.getShort("Length");

            byte[] blocks = nbtdata.getByteArray("Blocks");
            byte[] data = nbtdata.getByteArray("Data");


            System.out.println("schem size:" + width + " x " + height + " x " + length);
            NBTTagList tileentities = nbtdata.getTagList("TileEntities", 10);
            is.close();

            return new Schematic(tileentities, width, height, length, blocks, data);
        } catch (Exception e) {
            System.out.println("I can't load schematic, because " + e.toString());
            return null;
        }
    }

    public class Schematic{
        public  NBTTagList tileentities;
        public  short width;
        public  short height;
        public short length;
        public byte[] blocks;
        public byte[] data;
        public Schematic(NBTTagList tileentities, short width, short height, short length, byte[] blocks, byte[] data){
            this.tileentities = tileentities;
            this.width = width;
            this.height = height;
            this.length = length;
            this.blocks = blocks;
            this.data = data;
        }

    }

And it's from my item code, maybe it can help you:

public boolean onItemUse(ItemStack is, EntityPlayer placer, World world, int x, int y, int z, int side, float px, float py, float pz) {

        if(!world.isRemote && !blocked && delay<=0 && side == 1 && placer.capabilities.isCreativeMode){
        blocked = true;
        delay = 20;
        int rotation = OtherUtils.getPlayerRotationSide(placer);
        SchemUtils.Schematic sh = sut.get(schematic);
        if(sh==null){
            placer.addChatMessage(new ChatComponentText("Schematic is dead!"));
            this.setUnlocalizedName("builder_corrupt");
        return false;}

       if(logBuilding)placer.addChatMessage(new ChatComponentText("Building started."));

        int i = 0;
        for(int sy = 0; sy < sh.height; sy++)
        for(int sz = 0; sz < sh.length; sz++)
        for(int sx = 0; sx < sh.width; sx++){

                Block b = Block.getBlockById(sh.blocks[i]);
                if(b!= Blocks.air)
                {
                    int rx = SchemUtils.blockCoordsRotation(sx - this.getxShift(), sz, rotation)[0];
                    int rz = SchemUtils.blockCoordsRotation(sx - this.getxShift(), sz, rotation)[1];
                    world.setBlockToAir(x + rx, y + ylevel + sy, z + rz);
                    world.setBlock(x+rx, y+ylevel+sy, z+rz, b, SchemUtils.rotateMeta(sh.blocks[i], sh.data[i], rotation ), 2);
                }
                i++;
        }

        if (sh.tileentities != null)
        {
            for (int i1 = 0; i1 < sh.tileentities.tagCount(); ++i1)
            {
                NBTTagCompound nbttagcompound4 = sh.tileentities.getCompoundTagAt(i1);
                TileEntity tileentity = TileEntity.createAndLoadEntity(nbttagcompound4);

                if (tileentity != null)
                {
                    int[] conv2 = SchemUtils.blockCoordsRotation(tileentity.xCoord - this.getxShift(), tileentity.zCoord, rotation);
                    tileentity.xCoord = x + conv2[0];
                    tileentity.yCoord += y+ylevel;
                    tileentity.zCoord = z + conv2[1];
                    world.setTileEntity(tileentity.xCoord, tileentity.yCoord, tileentity.zCoord, tileentity);
                }
            }
        }

       if(logBuilding) placer.addChatMessage(new ChatComponentText("Building finished."));
        blocked = false;
        return true;
        }
        return false;
    }

Quote

July 8, 201411 yr

Author

Thank you much! I hope this can help me...

Quote

July 8, 201411 yr

Author

So in data[0] is the data (position, metadata) for the block from blocks[0] stored ?

Quote

July 8, 201411 yr

Yes, data[0] is the block[0]'s metadata.

Quote

July 9, 201411 yr

Author

So this would be right in the WorldGenerate method:

for(int chanceForChuk = 0; chanceForChuk < 1; chanceForChuk++) {
        	Schematic spring = SchematicLoader.get("spring");
        	 int i = 0;
             for(int cy = 0; cy < spring.height; cy++)
             for(int cz = 0; cz < spring.length; cz++)
             for(int cx = 0; cx < spring.width; cx++){

                     Block b = Block.getBlockById(spring.blocks[i]);
                     if(b!= Blocks.air)
                     {
                         world.setBlockToAir(cx , cy, cz);
                         world.setBlock(cx, cy, cz, b, Integer.parseInt(String.valueOf(spring.data[i])), 2);
                     }
                     i++;
             }
        }

Or would it be other if cx, cy, cz are my coordinates ? I am new with structure spawning in the world... Thanks for your help

Quote

July 9, 201411 yr

Integer.parseInt(String.valueOf(spring.data))

Wtf?

Quote

July 9, 201411 yr

Author

Oh, forget my code, i just write before I test. I read your code carefully but because of your rotationthings i am not sure about it, so how do you can generate a structure with the Schematic and blocks[] and data[] ?

I used Integer.parseINt(String.valueOf(spring.data)); because i needed an integer and Integer.something returns an integer, but i didn´t saw a byte - convert, so i tried to make first a string from the data stored in data and then I tried to get the value of this string.. Very complicated..

Quote

July 9, 201411 yr

Your code is correct. And you can pass meta directly, byte normally casts to int (world.setBlock(cx, cy, cz, b, spring.data[і]), 2); ).

And another thing.

Schematic spring = SchematicLoader.get("spring");

Don't forget to add extention to filename if you didnt do it.

Quote

July 9, 201411 yr

Author

I get an error:

my WorldGen code:

package de.MhytRPG.www.worldgen;

import java.util.Random;

import cpw.mods.fml.common.IWorldGenerator;
import de.MhytRPG.www.MhytRPG;
import de.MhytRPG.www.structures.Schematic;
import de.MhytRPG.www.structures.SchematicLoader;
import net.minecraft.block.Block;
import net.minecraft.init.Blocks;
import net.minecraft.world.World;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.feature.WorldGenLiquids;
import net.minecraft.world.gen.feature.WorldGenMinable;
import net.minecraft.world.gen.feature.WorldGenerator;

public class WorldGen implements IWorldGenerator{

@Override
public void generate(Random random, int chunkX, int chunkZ, World world, IChunkProvider chunkGenerator, IChunkProvider chunkProvider) {
        switch(world.provider.dimensionId){
        case -1:
            generateNether(world, random, chunkX * 16, chunkZ * 16);
            break;
        case 0:
            generateSurface(world, random, chunkX * 16, chunkZ * 16);
            break;
        case 1:
            generateEnd(world, random, chunkX * 16, chunkZ * 16);
            break;
        }
}

private void generateEnd(World world, Random rand, int chunkX, int chunkZ) {}

private void generateSurface(World world, Random rand, int chunkX, int chunkZ) {
        for(int k = 0; k < 10; k++){
        	int firstBlockXCoord = chunkX + rand.nextInt(16);
        	int firstBlockYCoord = rand.nextInt(200);
        	int firstBlockZCoord = chunkZ + rand.nextInt(16);
        	
        	(new WorldGenLiquids(MhytRPG.blockgoldenwater)).generate(world, rand, firstBlockXCoord, firstBlockYCoord, firstBlockZCoord);
        }
        for(int chanceForChuk = 0; chanceForChuk < 1; chanceForChuk++) {
        	Schematic spring = SchematicLoader.get("spring.schematic");
        	
        	int firstBlockXCoord = chunkX + rand.nextInt(16);
        	int firstBlockYCoord = rand.nextInt(200);
        	int firstBlockZCoord = chunkZ + rand.nextInt(16);
        	
        	 int i = 0;
             for(int cy = 0; cy < spring.height; cy++)
             for(int cz = 0; cz < spring.length; cz++)
             for(int cx = 0; cx < spring.width; cx++){

                     Block b = Block.getBlockById(spring.blocks[i]);
                     if(b!= Blocks.air)
                     {
                         world.setBlockToAir(cx + firstBlockXCoord , cy + firstBlockYCoord, cz + firstBlockZCoord);
                         world.setBlock(cx + firstBlockXCoord, cy + firstBlockYCoord, cz + firstBlockZCoord, b, spring.data[i] , 2);
                     }
                     i++;
             }
        }
}

private void generateNether(World world, Random rand, int chunkX, int chunkZ) {}
}

Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop

at de.MhytRPG.www.worldgen.WorldGen.generateSurface(WorldGen.java:52)

at de.MhytRPG.www.worldgen.WorldGen.generate(WorldGen.java:26)

at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:106)

at net.minecraft.world.gen.ChunkProviderServer.populate(ChunkProviderServer.java:316)

at net.minecraft.world.chunk.Chunk.populateChunk(Chunk.java:1163)

at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:210)

at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:151)

at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:121)

at net.minecraft.server.MinecraftServer.initialWorldChunkLoad(MinecraftServer.java:315)

at net.minecraft.server.integrated.IntegratedServer.loadAllWorlds(IntegratedServer.java:79)

at net.minecraft.server.integrated.IntegratedServer.startServer(IntegratedServer.java:96)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:455)

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:762)

My Line 52 is: for(int cy = 0; cy < spring.height; cy++)

I don´t really know why, is the spring.height = 0 ?

Quote

July 9, 201411 yr

Your your schematic getter returns null. Search in log for "I can't load schematic, because ...".

Quote

July 9, 201411 yr

Author

I didn´t find it. My log (skip the errors with unable loading pngs, because it is something I forgot to add a texture.):

[14:50:58] [main/INFO]: Setting user: ForgeDevName

[14:50:58] [Client thread/INFO]: LWJGL Version: 2.9.1

[14:51:01] [Client thread/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:MhytRPG

[14:51:02] [sound Library Loader/INFO]: Sound engine started

[14:51:03] [Client thread/INFO]: Created: 512x256 textures/blocks-atlas

[14:51:03] [Client thread/ERROR]: Using missing texture, unable to load mhytrpg:textures/items/boundedChain.png

java.io.FileNotFoundException: mhytrpg:textures/items/boundedChain.png

at net.minecraft.client.resources.FallbackResourceManager.getResource(FallbackResourceManager.java:65) ~[FallbackResourceManager.class:?]

at net.minecraft.client.resources.SimpleReloadableResourceManager.getResource(SimpleReloadableResourceManager.java:67) ~[simpleReloadableResourceManager.class:?]

at net.minecraft.client.renderer.texture.TextureMap.loadTextureAtlas(TextureMap.java:126) [TextureMap.class:?]

at net.minecraft.client.renderer.texture.TextureMap.loadTexture(TextureMap.java:91) [TextureMap.class:?]

at net.minecraft.client.renderer.texture.TextureManager.loadTexture(TextureManager.java:89) [TextureManager.class:?]

at net.minecraft.client.renderer.texture.TextureManager.loadTickableTexture(TextureManager.java:71) [TextureManager.class:?]

at net.minecraft.client.renderer.texture.TextureManager.loadTextureMap(TextureManager.java:58) [TextureManager.class:?]

at net.minecraft.client.Minecraft.startGame(Minecraft.java:593) [Minecraft.class:?]

at net.minecraft.client.Minecraft.run(Minecraft.java:941) [Minecraft.class:?]

at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_25]

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_25]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_25]

at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_25]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:134) [launchwrapper-1.9.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

[14:51:03] [Client thread/INFO]: Created: 256x256 textures/items-atlas

[14:51:03] [Client thread/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:MhytRPG

[14:51:03] [Client thread/ERROR]: Using missing texture, unable to load mhytrpg:textures/items/boundedChain.png

java.io.FileNotFoundException: mhytrpg:textures/items/boundedChain.png

at net.minecraft.client.resources.FallbackResourceManager.getResource(FallbackResourceManager.java:65) ~[FallbackResourceManager.class:?]

at net.minecraft.client.resources.SimpleReloadableResourceManager.getResource(SimpleReloadableResourceManager.java:67) ~[simpleReloadableResourceManager.class:?]

at net.minecraft.client.renderer.texture.TextureMap.loadTextureAtlas(TextureMap.java:126) [TextureMap.class:?]

at net.minecraft.client.renderer.texture.TextureMap.loadTexture(TextureMap.java:91) [TextureMap.class:?]

at net.minecraft.client.renderer.texture.TextureManager.loadTexture(TextureManager.java:89) [TextureManager.class:?]

at net.minecraft.client.renderer.texture.TextureManager.onResourceManagerReload(TextureManager.java:170) [TextureManager.class:?]

at net.minecraft.client.resources.SimpleReloadableResourceManager.notifyReloadListeners(SimpleReloadableResourceManager.java:134) [simpleReloadableResourceManager.class:?]

at net.minecraft.client.resources.SimpleReloadableResourceManager.reloadResources(SimpleReloadableResourceManager.java:118) [simpleReloadableResourceManager.class:?]

at net.minecraft.client.Minecraft.refreshResources(Minecraft.java:653) [Minecraft.class:?]

at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:303) [FMLClientHandler.class:?]

at net.minecraft.client.Minecraft.startGame(Minecraft.java:596) [Minecraft.class:?]