[SOLVED] Adding new Player-variable

Bedrock_Miner · July 19, 2013

Hello Guys!

I want to add a Mana-bar available for each player. It should have a maximum value of 250 Mana and should be rendered above the hunger-bar. The Mana bar should regenerate by one each second and should be increased by about 20 for each punch with a sword.

Does anybody know, how to do this?

Additional question:

How can I change the maximum Player Health to 250 and how can I change the Armor-calculator (I want to use another Formula then Armor*0.04)?

Please ask, if I should give further information!

hydroflame · July 19, 2013

Hello Guys!
I want to add a Mana-bar available for each player. It should have a maximum value of 250 Mana and should be rendered above the hunger-bar. The Mana bar should regenerate by one each second and should be increased by about 20 for each punch with a sword.

Does anybody know, how to do this?

you're gonna have to make a handler for RenderGameOverlayEvent to render the mana, to make it regenarate you're goign to need a TickHandler that ticks every second and regenerate the mana there.

to store the mana you're goign to need some sort of data structure (hashmap) and store a relation between the players and the mana (String -> float[]{min, max} OR EntityPlayer -> float[]{min, max})

to restore on hit just to a PlayerInterractEvent handler, you will also need to send the update on mana via packet handling

How can I change the maximum Player Health to 250

either make a base class change (making your mod incompatible) or do use a EntityLivingHurtEvent handler (or wtv its called) and transform the damage there (aka if you receive 5 dmg the end damage would be 5/250 of max hp) youll also need a RenderGameOverlayEvent handler for this as steve HUD health is based on a 20 basis (20 half heart) or you could just cancel the damage if its not close enough to be 1 after transform (aka if you receive 5 you would take technicly 5/250 of your hp but that not even 1/20, so just make the dmg zero and update whenever the damage pass a 1/20 threshold)

how can I change the Armor-calculator (I want to use another Formula then Armor*0.04)?

same as health, make basechange OR deal with it in a event handler

ps:you're trying to do a lot...

do what you want

Bedrock_Miner · July 19, 2013

Yes, I'm trying to do a lot... I'll try all the possibilities you mentioned (THANKS) and come back with errors

PS: I've got a laarge project... I've been planning this for two months now...

hydroflame · July 19, 2013

no i mean seriously, watchout to not be overwhelmed because im doing something similar and i know you will find a loooooot of bug

good luck have fun

Mazetar · July 19, 2013

I'll just drop this here:

http://www.minecraftforge.net/wiki/Gui_Overlay

*sneaks away*

Bedrock_Miner · August 25, 2013

you're gonna have to make a handler for RenderGameOverlayEvent to render the mana, to make it regenarate you're goign to need a TickHandler that ticks every second and regenerate the mana there.

to store the mana you're goign to need some sort of data structure (hashmap) and store a relation between the players and the mana (String -> float[]{min, max} OR EntityPlayer -> float[]{min, max})

to restore on hit just to a PlayerInterractEvent handler, you will also need to send the update on mana via packet handling

The rendering works now after a lot of problems

But I don't manage to add the real variable. And I don't understand whant you mean with

(String -> float[]{min, max} OR EntityPlayer -> float[]{min, max})

Could you please give me an example or something else?

@Mazetar: Thanks..

GotoLink · August 25, 2013

Map usage for newbie:

Map<Key,Value> map = new HashMap();//Initialization with an HashMap and generics, where Key and Value are any Object you want
map.put(key,value);//adds a key->value couple, or replace the value linked by the key
Value val = map.get(key);//gets a value from a key

Bedrock_Miner · August 26, 2013

Map usage for newbie:

Map<Key,Value> map = new HashMap();//Initialization with an HashMap and generics, where Key and Value are any Object you want
map.put(key,value);//adds a key->value couple, or replace the value linked by the key
Value val = map.get(key);//gets a value from a key

Thanks, I now have the variables for all the players.

But how can I save the values so that you have the same value if you relog?

Bedrock_Miner · August 28, 2013

Thank you. This works for now.

But I got another Problem.

How can I create a "start value" for these variables?

If I try to get access there is a null-pointer-exception, so I think the value is null.

But how can I set a start value (example: if you first spawn you get 20 points, then if there is a saved value, you get this one)

Bedrock_Miner · August 28, 2013

Sorry, I edited my question just when you answered

Bedrock_Miner · August 28, 2013

I have these code sections:

package mod.classes.handler;

import mod.Main;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.world.World;
import net.minecraftforge.common.IExtendedEntityProperties;

public class ExtendedProperties implements IExtendedEntityProperties {

public static final String identifier = Main.modID + "_properties";

public int mana;

@Override
public void saveNBTData(NBTTagCompound compound) {
	compound.setInteger("mana", mana);
}

@Override
public void loadNBTData(NBTTagCompound compound) {
	mana = compound.getInteger("mana");
}

@Override
public void init(Entity entity, World world) {
	mana = 20;
}
}

package mod.classes.handler;

import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraftforge.event.EventPriority;
import net.minecraftforge.event.ForgeSubscribe;
import net.minecraftforge.event.entity.EntityEvent.EntityConstructing;
import net.minecraftforge.event.entity.player.EntityInteractEvent;

public class EntityHandler {

@ForgeSubscribe(priority=EventPriority.NORMAL)
public void onEntityConstructing(EntityConstructing e)
{
	if (e.entity instanceof EntityPlayerMP)
		e.entity.registerExtendedProperties(ExtendedProperties.identifier, new ExtendedProperties());
}
}

And if I try this I get a null-pointer exception:

PlayerMana = ((ExtendedProperties) this.mc.thePlayer.getExtendedProperties(ExtendedProperties.identifier)).mana

Bedrock_Miner · August 28, 2013

Of course it will give you a NPE because you check for EntityPlayerMP which is the serverside player. Only check for EntityPlayer.

There's no NPE any more

But, when I try to change the values of Extended Properties in events nothing happens.

What's wrong?

@ForgeSubscribe(priority=EventPriority.NORMAL)
public void onEntityInteract(PlayerInteractEvent e)
{
	((ExtendedProperties)e.entityPlayer.getExtendedProperties(ExtendedProperties.identifier)).mana -= 1;
	System.out.println("Subtracted 1 mana"); //Just for controlling...
}

On the other hand: Isn't it better to save the values on server side? If you join a Server from different PCs, you always have the same Items.

hydroflame · August 28, 2013

On the other hand: Isn't it better to save the values on server side? If you join a Server from different PCs, you always have the same Items.

well ... yeah.... you are supposed to , you cant save it client side anyway

But, when I try to change the values of Extended Properties in events nothing happens.
What's wrong?

whats suppose to happen anyway ?

Bedrock_Miner · August 28, 2013

And how can I save the values at ServerSide, but also get access in gui-handlers via Minecraft.getMinecraft().thePlayer (or different?)

All in all:

- I want to save the variables at server side

- I need access to the variables from events with an instance of EntityPlayer as well as from Gui-handlers (I don't know if it's necessary to create a new instance of EntityPlayer for this, and even if, I don't know how)

How can I do this?

hydroflame · August 28, 2013

well extended properties get saved automaticly (or you need to implement read/write to nbt method in your IExtendedProperties)

and for client access, youll have to use packets to send the values

Bedrock_Miner · August 28, 2013

Packets.. OK... Never worked with them before. How can I do this?

hydroflame · August 28, 2013

start by looking at the wiki, theres a couple of tut on them

Bedrock_Miner · August 28, 2013

I looked at the wiki, but I couldn't find a Tut for this:

The following should happen:

[*]OnPlayerInteract works

[*]Send Packet "Mana" with value 1 works too

[*]Recieve Packet also ok without problems

[*]Add 1 to the players Mana

How can I do this last step?

I don't know how to find the right player or how to get a list of them

hydroflame · August 28, 2013

client side you DONT want a list of all players,

store the mana in the client proxy and only for local player

Bedrock_Miner · August 28, 2013

store the mana in the client proxy and only for local player

OK, but how can I save this with IExtendedProperties? For this I need a instance of EntityPlayer.

GotoLink · August 28, 2013

An abstract Player is given by the IPacketHandler method, cast it to EntityPlayer.

Bedrock_Miner · August 29, 2013

@GotoLink: Thx, that was very helpful!

OK... And how can I get an Instance of EntityPlayer in the method

@ForgeSubscribe
onRenderGameOverlay(RenderGameOverlayEvent e)
...

GotoLink · August 29, 2013

On client side, Minecraft.getMinecraft().thePlayer.

Bedrock_Miner · August 29, 2013

OK, I think i have to summarize everything i want, or nothing make sense anymore..

Thanks to all of you who tried to help me till now..

I want to add Some Variables (at least one) for each player
They have to be saved at server-side
I need access to the value of the variables from:

Handlers like onRenderGameOverlay (only mc.thePlayer)
Handlers like onEntityInteract (special instance of EntityPlayer)
Methods like onItemUse (special instance of EntityPlayer)

[*]The Variables need a start-value when you first join a server or respawn

GotoLink · August 29, 2013

Register a IExtendedEntityProperties on player with EntityConstructionEvent.

All data in it will be saved to server with saveNBTData.

I would recommend using EntityJoinWorldEvent to send a packet from server to client, describing all variables at start, to sync client with the server.

This would be a one time "description" packet.

Now that the data is synced, you can read it the same on both sides with a player instance.

player.getExtendedProperties(id)...

Changing the values would require sending "change" packets to maintain sync.

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[SOLVED] Adding new Player-variable

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