TechGuy's Modding Tutorials - Mapping and Modding Tutorials - Mapping and Modding: Java Edition - Minecraft Forum

#4391 Aug 30, 2012

skyress2000

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How do I make it so the block will face toward the player when I place it, like pistons, logs, repeaters, etc?

Last edited by skyress2000: Aug 30, 2012

#4393 Aug 30, 2012

ChickensBallz

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Failed to handle packet: java.lang.NullPointerException
java.lang.NullPointerException
  at net.minecraft.src.ItemStack.isItemStackDamageable(ItemStack.java:196)
  at net.minecraft.src.ItemStack.isItemDamaged(ItemStack.java:209)
  at net.minecraft.src.InventoryPlayer.addItemStackToInventory(InventoryPlayer.java:323)
  at net.minecraft.src.EntityItem.onCollideWithPlayer(EntityItem.java:241)
  at net.minecraft.src.EntityPlayer.collideWithPlayer(EntityPlayer.java:539)
  at net.minecraft.src.EntityPlayer.onLivingUpdate(EntityPlayer.java:530)
  at net.minecraft.src.EntityLiving.onUpdate(EntityLiving.java:668)
  at net.minecraft.src.EntityPlayer.onUpdate(EntityPlayer.java:262)
  at net.minecraft.src.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:221)
  at net.minecraft.src.NetServerHandler.networkTick(NetServerHandler.java:98)
  at net.minecraft.src.NetworkListenThread.networkTick(NetworkListenThread.java:45)
  at net.minecraft.src.IntegratedServerListenThread.networkTick(IntegratedServerListenThread.java:98)
  at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:635)
  at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:555)
  at net.minecraft.src.IntegratedServer.tick(IntegratedServer.java:122)
  at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:464)
  at net.minecraft.src.ThreadServerApplication.run(ThreadServerApplication.java:17)

TechGuy, This happens when I pick up my new block!

#4395 Aug 30, 2012

MagmaLair

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Join Date: 10/4/2011
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Quote from Saphir09

I think you have to change the name of your "Glasscraft_.java" to "mod_Glassscraft.java".
And you should use only one mod_ file.

Thank you I'll try that, and you also answered a reply of mine that got burried

#4396 Aug 30, 2012

MagmaLair

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Join Date: 10/4/2011
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Quote from Saphir09

I think you have to change the name of your "Glasscraft_.java" to "mod_Glassscraft.java".
And you should use only one mod_ file.

Um, it's still not working...

#4397 Aug 30, 2012

skyress2000

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Join Date: 1/11/2012
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Hi, I'm trying to make a block that faces toward the player when it's placed...
This is what I have so far:

public void onBlockPlacedBy(World world, int par2, int par3, int par4, EntityLiving entity)
{
byte var10 = 0;
int var11 = MathHelper.floor_double((double)(entity.rotationYaw * 4.0F / 360.0F) + 0.5D) & 3;
if(var11 == 0)
{
var10 = 2;
}
if(var11 == 1)
{
var10 = 5;
}
if(var11 == 2)
{
var10 = 3;
}
if(var11 == 3)
{
var10 = 4;
}
world.setBlockMetadataWithNotify(par2, par3, par4 - 1, var10 - 1); 
}
public int getBlockTextureFromSideAndMetadata(int i, int j)
{
if(j == 1)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 2)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 3)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 4)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else
return mod_Raspberries.freezerBack
}

I got the code for onBlockPlacedBy from BlockChest and I wrote the code for getBlockTextureAndMetadata. What seems to be happening is that the else statement goes every time and it just uses the freezerBack texture. What did I do wrong?

#4399 Aug 30, 2012

TehHerb

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Quote from TechGuy543

I can't seem to reproduce the error at the moment. I'll try again tomorrow, remind me if I forget and don't reply.

Bumping for this.

#4400 Aug 30, 2012

Dragonphly77

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Quote from Yz_EveR

Failed to handle packet: java.lang.NullPointerException
java.lang.NullPointerException
at net.minecraft.src.ItemStack.isItemStackDamageable(ItemStack.java:196)
at net.minecraft.src.ItemStack.isItemDamaged(ItemStack.java:209)
at net.minecraft.src.InventoryPlayer.addItemStackToInventory(InventoryPlayer.java:323)
at net.minecraft.src.EntityItem.onCollideWithPlayer(EntityItem.java:241)
at net.minecraft.src.EntityPlayer.collideWithPlayer(EntityPlayer.java:539)
at net.minecraft.src.EntityPlayer.onLivingUpdate(EntityPlayer.java:530)
at net.minecraft.src.EntityLiving.onUpdate(EntityLiving.java:668)
at net.minecraft.src.EntityPlayer.onUpdate(EntityPlayer.java:262)
at net.minecraft.src.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:221)
at net.minecraft.src.NetServerHandler.networkTick(NetServerHandler.java:98)
at net.minecraft.src.NetworkListenThread.networkTick(NetworkListenThread.java:45)
at net.minecraft.src.IntegratedServerListenThread.networkTick(IntegratedServerListenThread.java:98)
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:635)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:555)
at net.minecraft.src.IntegratedServer.tick(IntegratedServer.java:122)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:464)
at net.minecraft.src.ThreadServerApplication.run(ThreadServerApplication.java:17)

TechGuy, This happens when I pick up my new block!

Post the block file.

If it seems like this error is something that's just out of the blue, you could always use a try|catch clause.

When life gives you a potato, wonder why the heck life just gave you a potato. Why not something else? Like money? Or a combustable lemon? No, you get a potato. Nothing else.

#4401 Aug 30, 2012

Xjurwi

Carpenter
Join Date: 7/25/2012
Posts: 49
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Quote from Saphir09

In your ore's class file:

To change what the ore drops:

public int idDropped(int par1, Random par2Random, int par3)
{
return mod_yourMod.yourItem.shiftedIndex;
}

If you want that it drops a block:

public int idDropped(int par1, Random par2Random, int par3)
{
return mod_yourMod.yourBlock.blockID;
}

To change the amount of items that will drop:

public int quantityDropped(Random random)
{
return 1;
}

Now I have one more question, How do I change it so that only a Diamond Pick can mine it?

#4402 Aug 30, 2012

Jojoejoe3

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Quote from b0mbshellAntics

boop

Where could I find some example code on hitting an entity particles appear or rather how would I implement it onto a sword?

#4403 Aug 30, 2012

skyress2000

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Join Date: 1/11/2012
Posts: 615
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Quote from skyress2000

Hi, I'm trying to make a block that faces toward the player when it's placed...
This is what I have so far:

public void onBlockPlacedBy(World world, int par2, int par3, int par4, EntityLiving entity)
{
byte var10 = 0;
int var11 = MathHelper.floor_double((double)(entity.rotationYaw * 4.0F / 360.0F) + 0.5D) & 3;
if(var11 == 0)
{
var10 = 2;
}
if(var11 == 1)
{
var10 = 5;
}
if(var11 == 2)
{
var10 = 3;
}
if(var11 == 3)
{
var10 = 4;
}
world.setBlockMetadataWithNotify(par2, par3, par4 - 1, var10 - 1);
}
public int getBlockTextureFromSideAndMetadata(int i, int j)
{
if(j == 1)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 2)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 3)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 4)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else
return mod_Raspberries.freezerBack
}

I got the code for onBlockPlacedBy from BlockChest and I wrote the code for getBlockTextureAndMetadata. What seems to be happening is that the else statement goes every time and it just uses the freezerBack texture. What did I do wrong?

got buried...

#4404 Aug 30, 2012

Dragonphly77

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Quote from Jojoejoe3

Where could I find some example code on hitting an entity particles appear or rather how would I implement it onto a sword?

Probably in the EntityCow/Creeper/whatever file or the EntityCritFX file.
As far as implementing it in to a sword, I don't really know; I'm not very proficient in particle emitting yet.

When life gives you a potato, wonder why the heck life just gave you a potato. Why not something else? Like money? Or a combustable lemon? No, you get a potato. Nothing else.

#4405 Aug 31, 2012

ZeroLevels

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I'm looking forward to if you do some Forge tutorials. You've got such nice ModLoader ones. They're consistent, and probably the most complete tutorials I've seen in general. (And up to date)

I'm sorry I haven't been around to help more. But I've put modding on hold until I've come to better understand java itself. Keep up the great work, Techguy.

I used to maintain the Minecraft Forums Mod List. However, life has stepped in the way of that. Perhaps later...

#4406 Aug 31, 2012

TechGuy543

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Join Date: 9/25/2011
Posts: 3,029
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Quote from ZeroLevels

I'm looking forward to if you do some Forge tutorials. You've got such nice ModLoader ones. They're consistent, and probably the most complete tutorials I've seen in general. (And up to date)

I'm sorry I haven't been around to help more. But I've put modding on hold until I've come to better understand java itself. Keep up the great work, Techguy.

Thanks

When did you become a moderator?

Last edited by TechGuy543: Aug 31, 2012

“Computers are incredibly fast, accurate and stupid; humans are incredibly slow, inaccurate and brilliant;
together they are powerful beyond imagination."

#4407 Aug 31, 2012

MagmaLair

Tree Puncher
Join Date: 10/4/2011
Posts: 16
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Quote from Saphir09

I think you have to change the name of your "Glasscraft_.java" to "mod_Glassscraft.java".
And you should use only one mod_ file.

Holly poop! I just realised what you were trying to say (Well succesfully saying but I was misunderstanding). I didn't know that the ModLoader file in the spoiler of Techguy's Tutorials was an example! That's why I split it into two. Thank you

I feel like such a noob.

#4410 Aug 31, 2012

skyress2000

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Join Date: 1/11/2012
Posts: 615
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Quote from Saphir09

Glad you're understanding it now!
Everyone has to slowly get better in such things, I'm not an expert either...

Open ItemPickaxe.class and add:

private static Block[] blocksEffectiveAgainst = new Block[] { Block.yourBlock, ... };

public boolean canHarvestBlock(Block par1Block)
{
return par1Block == Block.yourBlock ? this.toolMaterial.getHarvestLevel() == 3 : ...
}

Is there a way to do this without editing a base class?

#4411 Aug 31, 2012

skyress2000

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Join Date: 1/11/2012
Posts: 615
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Quote from skyress2000

Hi, I'm trying to make a block that faces toward the player when it's placed...
This is what I have so far:

public void onBlockPlacedBy(World world, int par2, int par3, int par4, EntityLiving entity)
{
byte var10 = 0;
int var11 = MathHelper.floor_double((double)(entity.rotationYaw * 4.0F / 360.0F) + 0.5D) & 3;
if(var11 == 0)
{
var10 = 2;
}
if(var11 == 1)
{
var10 = 5;
}
if(var11 == 2)
{
var10 = 3;
}
if(var11 == 3)
{
var10 = 4;
}
world.setBlockMetadataWithNotify(par2, par3, par4 - 1, var10 - 1);
}
public int getBlockTextureFromSideAndMetadata(int i, int j)
{
if(j == 1)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 2)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 3)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 4)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else
return mod_Raspberries.freezerBack
}

I got the code for onBlockPlacedBy from BlockChest and I wrote the code for getBlockTextureAndMetadata. What seems to be happening is that the else statement goes every time and it just uses the freezerBack texture. What did I do wrong?

buried again, someone help please!

Last edited by skyress2000: Aug 31, 2012

#4413 Aug 31, 2012

skyress2000

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Join Date: 1/11/2012
Posts: 615
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Quote from Saphir09

Well, no. At least I don't know a way to do this without changing the Pickaxe.class

aww...
well then I'll try to find a way myself, I'll post it here if i do! (i.e. go looking through ModLoader.java and see if any of the functions are for what I want...)

#4414 Aug 31, 2012

skyress2000

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Join Date: 1/11/2012
Posts: 615
Minecraft: skyress3000
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Quote from Saphir09

Glad you're understanding it now!
Everyone has to slowly get better in such things, I'm not an expert either...

Open ItemPickaxe.class and add:

private static Block[] blocksEffectiveAgainst = new Block[] { Block.yourBlock, ... };

public boolean canHarvestBlock(Block par1Block)
{
return par1Block == Block.yourBlock ? this.toolMaterial.getHarvestLevel() == 3 : ...
}

Wouldn't it be mod_***.YourBlock, not Block.YourBlock?

#4415 Aug 31, 2012

bl4ckscor3

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Quote from skyress2000

Wouldn't it be mod_***.YourBlock, not Block.YourBlock?

no. because a block.class is like thi: BlockYourBlock and not Block.YourBlock. It is:

private static Block[] blocksEffectiveAgainst = new Block[] { mod_yourBlock, ... };
public boolean canHarvestBlock(Block par1Block)
{
return par1Block == mod_yourBlock ? this.toolMaterial.getHarvestLevel() == 3 : ...
}

Come join me on Discord!

#4417 Aug 31, 2012

skyress2000

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Join Date: 1/11/2012
Posts: 615
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Quote from skyress2000

Hi, I'm trying to make a block that faces toward the player when it's placed...
This is what I have so far:

public void onBlockPlacedBy(World world, int par2, int par3, int par4, EntityLiving entity)
{
byte var10 = 0;
int var11 = MathHelper.floor_double((double)(entity.rotationYaw * 4.0F / 360.0F) + 0.5D) & 3;
if(var11 == 0)
{
var10 = 2;
}
if(var11 == 1)
{
var10 = 5;
}
if(var11 == 2)
{
var10 = 3;
}
if(var11 == 3)
{
var10 = 4;
}
world.setBlockMetadataWithNotify(par2, par3, par4 - 1, var10 - 1);
}
public int getBlockTextureFromSideAndMetadata(int i, int j)
{
if(j == 1)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 2)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 3)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else if (j == 4)
return i == 3 ? mod_Raspberries.freezerFront : i == 2 ? mod_Raspberries.freezerBack : i == 1 || i == 0 ? mod_Raspberries.freezerTop : i == 4 ? mod_Raspberries.freezerLeftSide : i == 5 ? mod_Raspberries.freezerRightSide : mod_Raspberries.freezerRightSide;
else
return mod_Raspberries.freezerBack
}

I got the code for onBlockPlacedBy from BlockChest and I wrote the code for getBlockTextureAndMetadata. What seems to be happening is that the else statement goes every time and it just uses the freezerBack texture. What did I do wrong?