[[SOLVED] How to compile individual projects in a workspace]

these are things which are never explained in tutorials

Actually, Lex Manos himself released a tutorial explaining how to set up a

. Doesn't get more correct than this - straight from the top

[Insert an Update Checker that notifies players?]

Oh, okay and how excactly does it work? Do i have to install version checker?

No, you don't, but if players want to take advantage of your version checking, then they would have to install it.

[Insert an Update Checker that notifies players?]

Instead of coding it yourself, you could also use a mod like [url=http://2091981/]VersionChecker[/url] - all you do is add 2 lines of code to your main class and place a 'versionlist.json' online, such as in your Github repository, and voilá, version checking implemented with a nice interface from the main game menu, ability to download your mod directly from there / see the change log, etc.

Example code:
[code
// put this within FMLInitializationEvent
String link = "https://raw.githubusercontent.com/coolAlias/ZeldaSwordSkills/master/src/main/resources/versionlist.json";
FMLInterModComms.sendRuntimeMessage(ModInfo.ID, "VersionChecker", "addVersionCheck", link);

Note that it's important to use the 'raw' form of the .json, otherwise VC can't read it.

[[1.7.10] How to do x when y is in inventory?]

Item#onUpdate is called every tick the item is in the player's inventory.

[[1.7.10]How to add slots to the Playerinventory?]

I happen to have a tutorial that covers this exact topic.

[Revamp the health system]

Subscribe to RenderGameOverlayEvent.Pre, check if the event.type is ElementType.HEALTH and cancel the event if it is. This will stop the hearts from being rendered. Then do your own rendering.

[[1.7.10] Something to add interaction to a mob without editing it.]

Well if you've never had even one Java lesson in your life, you may want to start there

 

As far as Forge is concerned, however, you can use Events. Specifically, you'll want to subscribe to the EntityInteractEvent which is fired every time the player right-click interacts with an entity.

[[1.8] Custom HUD rendering problems]

Well I would assume I am handling it being null because

if (stack == null) continue;
and
if (this.mc.thePlayer.inventory.getCurrentItem() != null)

should handle it, correct?

Is that the line that your crash log pointed to when it gave you the NPE? No, it isn't, i.e. this is not where the problem is.

[[1.8] Custom HUD rendering problems]

So I did that and it appears to go null on the .getIconName() method

So... you can fix it now, right, since you know what is null?

 

Specifically: "Calling the instance method of a null object."

 

i.e. You cannot call a class method if you do not have an object of that class. You are trying to call getIconName() on a NULL object.

[Class that extends Block]

Folks, there is no such thing as a 'Forge Block' - Block is a vanilla class, and any subclass thereof can be substituted for the original as a method parameter. Basic inheritance.

[help with PlayerEvent.BreakSpeed]

You don't. It's a Forge method - tampering with it would bring the world crashing down.

 

To clarify, you want the player to mine ALL blocks at the same speed, regardless of tool? In that case, just check in your BreakEvent if the player's currently held item can harvest the block - if it cannot, multiply your break speed by (100 / 30) to compensate for the difference.

[help with PlayerEvent.BreakSpeed]

It's because if the current tool (or hand) cannot break the block, the speed is divided by 100 instead of 30:

// in ForgeHooks:
public static float blockStrength(IBlockState state, EntityPlayer player, World world, BlockPos pos)
    {
        float hardness = state.getBlock().getBlockHardness(world, pos);
        if (hardness < 0.0F)
        {
            return 0.0F;
        }

        if (!canHarvestBlock(state.getBlock(), player, world, pos))
        {
            return player.getBreakSpeed(state, pos) / hardness / 100F;
        }
        else
        {
            return player.getBreakSpeed(state, pos) / hardness / 30F;
        }
    }

As you can see, always returning 5 will yield pretty different results based on the above algorithm.

 

Btw, you can easily find out such things yourself by utilizing the power of your IDE - select a method, right click and 'open call hierarchy' to see where it is called from, then keep following the rabbit hole.

[[1.7.10] Crashing]

You can't reference an object before it is initialized. Initialize first, then register.

[[1.8] Custom HUD rendering problems]

TextureAtlasSprite textureAtlasSprite = mc.getTextureMapBlocks().getAtlasSprite(ibakedmodel.getTexture().getIconName()); // This is where the crash points to

Whenever you get a NULL pointer exception, the first thing you should do is put a break point on that line and fire up the debugger.

 

If you are not comfortable doing that, then you can still quickly debug it by putting everything on its own line:

TextureAtlasSprite textureAtlasSprite = mc
    .getTextureMapBlocks()
    .getAtlasSprite(ibakedmodel
        .getTexture()
        .getIconName()
    );

Now when you run your code again, you will find out EXACTLY which of those is null.

[[1.7.10] Making a autosmelt pickaxe]

If Item#onBlockDestroyed doesn't allow preventing then using BlockEvent.HarvestDropsEvent would be best to use

You could probably override Item#canHarvestBlock(Block) to return false if the block has a smelting result - thus preventing any normal harvesting, and then dropping the smelting result from #onBlockDestroyed.

 

@OP Of course you can drop stone instead of cobblestone - the problem you are running into, however, is that the block being destroyed is stone, which does not have a smelting result.

 

You should instead be checking the actual item dropped from the block, not the block itself. You could do this with Block#getItemDropped and Block#getDamageValue, but that may or may not produce the actual desired result, and you wouldn't be able to check for it in #canHarvestBlock due to the lack of a World and BlockPos.

 

Jedispencer's suggestion of using the HarvestDropsEvent may be your only recourse in this matter, which is fine - that's what it's there for - but it's always good to explore other options first.

[[1.7.10] Making a autosmelt pickaxe]

so I tried to add it into my if statement and the only place I could add it in was here 'if (stack.copy() != null)' but it still crashed

This is what I meant:

if (stack != null) {
   player.entityDropItem(stack.copy());
}

 

why don't you try using BlockEvent.HarvestDropsEvent and check if the player is using your tool then get the smelting result and drop that instead of the normal block

He could, but why do so when he already has a custom Item class ? Subscribing to Forge events should always be considered somewhat of a 'last resort', as the event handler is called for EVERY harvest, whether or not the player is wielding the pickaxe, whereas the code in the pickaxe is only called when it is actually used to break the block.

 

On the other hand, the harvest event lets you prevent the normal drop, whereas I don't think Item#onBlockDestroyed does. Hmm.

[[1.7.10] Making a autosmelt pickaxe]

No, it's because the smelting result might return null, but you immediately call copy() on it:

FurnaceRecipes.smelting()
   .getSmeltingResult(new ItemStack(block)) // this returned null
   .copy() // so this crashes

Simply move the call to copy() to inside your 'if (stack != null) ' clause and you're good to go.

[[1.8] Json block states passing down variables]

You can of course alter a JSON file at any time, but Minecraft only reads them in once when it first loads the models, blockstates, etc., so in this case that would not have any benefit unless you forced it to reload for every single one of your blocks / TileEntities every single tick, because they're all different, right?

 

File I/O is relatively expensive, so I recommend you avoid it if you can. Luckily for you, there are ISmartBlockModels, IFlexibleBlockModels, TileEntitySpecialRenderers, and that sort of thing which allow you to dynamically render your blocks / TileEntities.

 

You can also register a custom IStateMapper for your block to drastically reduce the number of variants and models you need in your blockstate file - most useful in combination with the above.

[Attack animation not working [1.7.10]]

It looks like you are trying to mimic the vanilla Iron Golem attack animation, correct? In any case, you should look at the Iron Golem code, both the Entity and the Model, to see how it handles the attack timer / animation.

 

Here's what you should pay attention to / learn as you look through the IronGolem classes:

1. Golem attacks, calls world.setEntityState(this, byteFlag)

2. Minecraft sends a packet for you that calls golem#handleHealthUpdate(byteFlag) on the client side

3. When byteFlag is received, it starts the golem's attack timer - again, this is on the client side, which is important

4. attack timer is decremented every tick in the entity's onLivingUpdate method

5. In the model class, which is client side, it can now see that the attack timer is ticking and animate accordingly in setLivingAnimations

[Entities and NBTs]

Which player? Do you have an EntityPlayer available in your projectile, e.g. the thrower / shooter? If so, you can use player.getHeldItem() to get the currently held ItemStack, if any, and do whatever you want with it, e.g. stack.getTagCompound() to get the NBTTagCompound, if any.

[Attack animation not working [1.7.10]]

which forge event? @SideOnly(Side.CLIENT) this?

Well, it's not really a Forge event, but it looks as though you copied it from a Forge event and may have been expecting it to act like one:

// in your Model class:
public void LivingAttackEvent(EntityLivingBase entity, float par1, float par2, float par3){

Where are you calling that from? Are you calling it at all?

 

Perhaps you should check out Jabelar's tutorial on animations / entities.

[Attack animation not working [1.7.10]]

Why are you using a Forge Event to handle your animation?!?!?!?! No no no. Not good.

 

It's YOUR entity class, and YOUR model, use the methods already available to you: ModelBase#setLivingAnimations has access to any of your entity fields that have been synced to the client, whether by packet, DataWatcher, or World#setEntityState + YourEntity#handleHealthUpdate.

[[1.8] Errors while trying to make an Item]

TheGreyGhost has put together many examples that follow closely to accepted 'best' practices.

 

There are also many others, specifically Wuppy who has put out a prolific amount of good quality tutorials, and you can also look on the Forge Wiki (linked in the nav menu on this page) for tutorials.

[[1.8] Errors while trying to make an Item]

Unless you added it yourself, there isn't any such thing as 'RegisterHelper' - there is a GameRegistry class which is the one most modders use to register their items and blocks.

 

You shouldn't be inline instantiating your items, either - I suggest you find a tutorial author that knows what they are doing. Items and blocks need to be declared, and then instantiated during the FMLPreInitializationEvent.

 

Inline instantiation looks like this:

public static Item whatever; // that's a declaration
public static Item whatever = new Item(); // that's inline instantiation

 

As for your second error, my guess is that ItemEXTS does not extend Item, and thus has no method for setUnlocalizedName.

[Is there something like "onSpawn"?]

If you want it to happen every time the player dies and respawns, use PlayerRespawnEvent.

 

You won't need IEEP if you want it to happen every time, but like Ernio said, if you only want it to happen once, then you need to store that somehow.