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[1.7.10][Solved] Replace item with another


Jetfan16ladd
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I will start with this: "Please, go learn basics of Java."

Nothing will help you if you can't even override methods.

 

 

You need to override vanilla Item.class's method:

    public boolean onEntitySwing(EntityLivingBase entityLiving, ItemStack stack)
    {
        return false;
    }

 

You will want to grab 'entityLiving', check if its player (instanceof/cast), then get current held item (the stack) and set it different, new one.

playerIn.inventory.currentItem

1.7.10 is no longer supported by forge, you are on your own.

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Sorry that I don't know that much java. I really don't want to learn it because I wont need it other then for this.

I fixed the override but I don't know how to "grab 'entityLiving', check if its player (instanceof/cast), then get current held item (the stack) and set it different, new one." and idk what the code at bottem is.

 

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Sorry that I don't know that much java. I really don't want to learn it because I wont need it other then for this.

I fixed the override but I don't know how to "grab 'entityLiving', check if its player (instanceof/cast), then get current held item (the stack) and set it different, new one." and idk what the code at bottem is.

You should learn basic java to do that exactly...

I. Stellarium for Minecraft: Configurable Universe for Minecraft! (WIP)

II. Stellar Sky, Better Star Rendering&Sky Utility mod, had separated from Stellarium.

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playerIn is a name Ernio assigned to EntityLivingBase.

 

Basically you want to check if EntityLivingBase is an instance of EntityPlayer. In java its a simple as this:

 

public boolean onEntitySwing(EntityLivingBase theEntityYoureChecking, ItemStack theItemStackTheEntityIsHolding){
    if (theEntityYoureChecking instanceof EntityPlayer){
        //The Entity Is A Player.
    }
    return false;
}

 

If the Entity is a player, then we want to replace the item. If it is a zombie, or a chicken, we don't. So we can add an else statement.

 

public boolean onEntitySwing(EntityLivingBase theEntityYoureChecking, ItemStack theItemStackTheEntityIsHolding){
    if (theEntityYoureChecking instanceof EntityPlayer){
        //The Entity Is A Player.
        return true;
    } else {
        //The Entity Is Not A Player.
        return false;
    }
}

 

Since the entity is a player, we want to get the current stack theyre holding, and then replace it with your own. You can do this by casting the Entity to EntityPlayer:

 

 
    EntityPlayer player = (EntityPlayer) theEntityYoureChecking;
                                            
                                           ^
                               That is called "Casting"

 

 

and then getting the slot theyre currently using, like this:

 

public boolean onEntitySwing(EntityLivingBase theEntityYoureChecking, ItemStack theItemStackTheEntityIsHolding){
    if (theEntityYoureChecking instanceof EntityPlayer){
        EntityPlayer player = (EntityPlayer) theEntityYoureChecking;

        Int slot= player.inventory.currentItem;

        //The Entity Is A Player.
        return true;
    } else {
        //The Entity Is Not A Player.
        return false;
    }
}

 

To replace it with your own items, you need to create a new ItemStack() with the items you want. It is done like this:

 

ItemStack stack = new ItemStack(ItemYouWantHere, AmountOfItems);

an example:

ItemStack stack = new ItemStack(Items.egg, 5);

 

This would make a new ItemStack with 5 eggs in it. You can add that to your method.

 

 
public boolean onEntitySwing(EntityLivingBase theEntityYoureChecking, ItemStack theItemStackTheEntityIsHolding){
    if (theEntityYoureChecking instanceof EntityPlayer){
        //The Entity Is A Player.

        EntityPlayer player = (EntityPlayer) theEntityYoureChecking;

        Int slot = player.inventory.currentItem;

        ItemStack stack = new ItemStack(Items.egg, 5);
        return true;
    } else {
        //The Entity Is Not A Player.
        return false;
    }
}

 

Now, it is very simple. Just replace the players current held ItemStack with the one you created. That is done like this:

 

player.inventory.setInventorySlotContents(slotToPutItIn, itemStackToPut);

 

Since we already have the slot the player is currently using, and we have out stack to put in it, we can add the final part to our method:

 

public boolean onEntitySwing(EntityLivingBase theEntityYoureChecking, ItemStack theItemStackTheEntityIsHolding){
    if (theEntityYoureChecking instanceof EntityPlayer){
        //The Entity Is A Player.

        EntityPlayer player = (EntityPlayer) theEntityYoureChecking;

        Int slot = player.inventory.currentItem;

        ItemStack stack = new ItemStack(Items.egg, 5);

        player.inventory.setInventorySlotContents(slot, stack);
        return true;
    } else {
        //The Entity Is Not A Player.
        return false;
    }
}

 

Hope I helped!

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1) use System.out.println(); in various places to aid in debugging (if you type Sysout or sysout and click the ctrl and the space keys on keyboard) this is a short way of typing System.out.println();

 

3) Watch some java tutorials before posting because people always get upset if you dont have a decent understanding of JAVA - I know this from experience

 

4) some useful modding links:

 

Useful Resources

 

 

http://see.stanford.edu/see/lecturelist.aspx?coll=824a47e1-135f-4508-a5aa-866adcae1111

JAVA Programming Lectures

 

http://bmanolov.free.fr/javaoperators.php

Java Operators doc

 

www.google.com

Google - great resource

 

https://www.youtube.com/user/nealegaming

a Youtube series for how to add some stuff in Minecraft 1.7.2/1.7.10 pretty good overview

 

http://greyminecraftcoder.blogspot.com.au/2013/12/overview-of-forge-and-what-it-can-do.html

A Blog overview of how Minecraft Forge Works

 

http://www.wuppy29.com/minecraft/modding-tutorials/forge-modding-1-7/

Alot of good Tutorials for modding Minecraft 1.7.2 and earlier versions

 

http://anthony-lomeli.net/tutorials/tutorial-how-to-make-a-simple-multiblock-structure

Multiblock structure tutorial

 

http://greyminecraftcoder.blogspot.com.au/2013/07/rendering-transparent-blocks.html

rendering invisible blocks

 

Minecraft Forge's functions and fields map

https://github.com/MinecraftForge/FML/tree/1.7.10/conf

 

http://jabelarminecraft.blogspot.ca/p/minecraft-forge-172-event-handling.html

Event Handling

 

http://www.minecraftforum.net/topic/2001807-172how-to-code-custom-3d-armor-models-3d-weapons-or-items-tutorial-by-senpaisubaraki/

3D Armour

 

 

https://www.youtube.com/watch?v=LBF0oXZ0VyY

http://jabelarminecraft.blogspot.ca/p/complex-entity-models-including.html

Animation Tutorials

 

http://www.minecraftforum.net/forums/mapping-and-modding/resource-packs/resource-pack-discussion/1256350-animation-in-resource-packs-a-minecraft-1-6

Item texture and block texture animation tutorials

 

https://www.youtube.com/watch?v=D3U2JTicSjg&index=2&list=PL6lD77ZPqAf3XCIf86jzxxFsJILbdMo_G

Rendering Tutorials

 

 

5) Look at Vanilla classes figure out how they work - great way to accomplish stuff you want. If  modding in Eclipse look in ReferenceLibraries\forgeSrc to find the source code for Minecraft

 

6) in Eclipse pressing the Ctrl and the H keys together when in the Package Explorer is useful in finding stuff in your code/vanilla code

 

7) If you want to figure out how a function is called right click on it and press Ctrl + Alt + H keys together to see where it is called in code

 

8) The Thank You button is located ---------------------------------> That way ish ---------------------->

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