Create a new command that would generate a block at the position where the player is looking.

[Sara Fatih]

Hi Jimmy,

I am having trouble with creating a command that would spawn a block that I created and that I called "zero". What I want to do is to enable the player to write the command "sample 0" and that would generate a block zero at the position where he is looking. I used the event handling function that you gave in Hour 13. Please find below my code for both the handler class and the command. And I would like to thank you in advance for any help you would provide me to make this code correct, because I run the command and it doesn't do anything. I am sorry for the fact that the codes are too long, but I couldn't make them any shorter.

Best,

Sara.

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Event handler code:

package com.sara.myMod;

import java.util.Random;

import net.minecraft.block.Block;

import net.minecraft.block.state.IBlockState;

import net.minecraft.block.state.pattern.BlockHelper;

import net.minecraft.init.Blocks;

import net.minecraft.util.BlockPos;

import net.minecraft.world.World;

import net.minecraft.world.chunk.IChunkProvider;

import net.minecraft.world.gen.feature.WorldGenMinable;

import net.minecraftforge.fml.common.IWorldGenerator;

public class SaraEventHandler implements IWorldGenerator {

@Override

public void generate(Random random, int chunkX, int chunkZ, World world, IChunkProvider chunkGenerator, IChunkProvider chunkProvider) {

switch (world.provider.getDimensionId()){

case -1:

generateNether(world,random,chunkX * 16, chunkZ *16);

case 0:

generateSurface(world,random,chunkX * 16, chunkZ * 16);

case 1:

generateEnd(world,random,chunkX * 16, chunkZ * 16);

}

}

private void generateNether(World world, Random random, int i, int j) {

}

void generateSurface(World world, Random random, int x, int z) {

addOreSpawn(MyMod.zero.getDefaultState(),Blocks.dirt, world, random,x,z, 16, 16, 5 + random.nextInt(5),4, 20, 60);

}

private void generateEnd(World world, Random random, int x, int z) {

addOreSpawn(MyMod.zero.getDefaultState(),Blocks.netherrack, world, random,x,z, 16, 16, 5 + random.nextInt(5),4, 20, 60);

}

public void addOreSpawn(IBlockState block, Block target, World world, Random random, int blockXPos, int blockZPos, int maxX, int maxZ, int maxVeinSize, int chancesToSpawn, int minY, int maxY){

assert maxY > minY: "The maximum Y must be greater than the Minimum Y";

assert maxX > 0 && maxX <= 16: "addOreSpawn:The Maximum X must be greater than 0 and less than 16";

assert minY > 0: "addOreSpawn:The Minimum Y must be greater than 0";

assert maxY < 256 && maxY >0: "addOreSpawn:The Maximum Y must be less than 256 but greater than 0";

assert maxZ>0 && maxZ<=16: "addOreSpawn: The Maximum Z must be greater than 0 and less than 16";

int diffBtwnMinMaxY = maxY - minY ;

for(int x=0; x <chancesToSpawn; x++){

int posX = blockXPos + random.nextInt(maxX);

            int posY = minY + random.nextInt(diffBtwnMinMaxY);

            int posZ = blockZPos + random.nextInt(maxZ);

            (new WorldGenMinable(block, maxVeinSize, BlockHelper.forBlock(target))).generate(world, random, new BlockPos(posX, posY, posZ));

    }

}

}

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Command code

package com.sara.myMod;

import java.util.ArrayList;

import java.util.List;

import java.util.Random;

import net.minecraft.command.CommandException;

import net.minecraft.command.ICommand;

import net.minecraft.command.ICommandSender;

import net.minecraft.entity.SharedMonsterAttributes;

import net.minecraft.entity.player.EntityPlayer;

import net.minecraft.init.Blocks;

import net.minecraft.util.BlockPos;

import net.minecraft.util.ChatComponentText;

import net.minecraft.util.EnumChatFormatting;

import net.minecraft.world.World;

public class SampleCommand implements ICommand {

private List aliases;

public SampleCommand(){

this.aliases = new ArrayList();

this.aliases.add("spawn");

this.aliases.add("sara");

}

@Override

public int compareTo(Object o) {

// TODO Auto-generated method stub

return 0;

}

@Override

public String getName() {

return "sample";

}

@Override

public String getCommandUsage(ICommandSender sender) {

return "/sample <number>";

}

@Override

public List getAliases() {

return this.aliases;

}

@Override

public void execute(ICommandSender sender, String[] args) throws CommandException {

if(sender instanceof EntityPlayer){

EntityPlayer player = (EntityPlayer) sender;

SaraEventHandler handler = new SaraEventHandler();

//BlockZero zero = new BlockZero();

World world = player.getEntityWorld();

Random random = player.getRNG();

int x = (int) player.getLookVec().xCoord;

int y = (int) player.getLookVec().yCoord;

int z = (int) player.getLookVec().zCoord;

if(args.length ==0){

sender.addChatMessage(new ChatComponentText("Invalid arguments"));

}

else{

switch(args[0]){

case "0":

//world.makeFireworks(x, y, z, motionX, motionY, motionZ, compund)

//sender.addChatMessage(new ChatComponentText("You failed"));

//handler.generateSurface(world, random,x, z);

handler.addOreSpawn(MyMod.zero.getDefaultState(),Blocks.dirt, world, random,x,z, 16, 16, 5 + random.nextInt(5),4, 20, 60);

//handler.addOreSpawn(zero, target, world, random, blockXPos, blockZPos, maxX, maxZ, maxVeinSize, chancesToSpawn, minY, maxY)

//case "1":

// sender.addChatMessage(new ChatComponentText("You failed"));

}

}

}

}

@Override

public boolean canCommandSenderUse(ICommandSender sender) {

return true;

}

@Override

public List addTabCompletionOptions(ICommandSender sender, String[] args,

BlockPos pos) {

// TODO Auto-generated method stub

return null;

}

@Override

public boolean isUsernameIndex(String[] args, int index) {

// TODO Auto-generated method stub

return false;

}

}

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And in my mod file I have registered the command in the server side, using the following code:

@EventHandler

    public void registerCommands(FMLServerStartingEvent event){

     ServerCommandManager manager = (ServerCommandManager) event.getServer().getCommandManager();

     manager.registerCommand(new CommandHealth());

     manager.registerCommand(new SampleCommand());

    }

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Looking forward to hearing from you soon.

[Jimmy Koene]

Hello,

I'm terribly sorry about taking this long to reply. The last few weeks have been incredibly busy.

Unfortunately, I have no experience with commands so I don't think I will be able to help you. What I suggest you do is join #minecraftforge on IRC and ask people there. If you don't know how to use IRC, there is a segment on it in the last chapter of the book. 

My apologies,

Jimmy Koene

[hernandez...@gmail.com]

Thank you for your response. I was able to solve it in the end :)

Best,

Sara.