[SOLVED] 1.12.2 Custom Potion Effect Not Syncing to Client

[Laike_Endaril]

I've been delving into the potion-related code in MC and it *seems* like custom potion effects on the player should automatically sync to the client, but for some reason my potion effect only exists server-side.  The potion itself works, and the particle effect is spawned, but I must be missing something to allow the existing synchronization system to sync my potion effect, because iterating through + printing the potion effects shows the effect server-side, but not client-side.

 

Potion:

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package com.fantasticsource.dynamicstealth.common.potions;

import com.fantasticsource.dynamicstealth.common.DynamicStealth;
import com.fantasticsource.dynamicstealth.server.senses.EntityVisionData;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.Gui;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.ai.attributes.AbstractAttributeMap;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

public class PotionSoulSight extends Potion
{
    private final ResourceLocation iconTexture;

    public PotionSoulSight()
    {
        super(false, 0xFFFF55);
        setPotionName(DynamicStealth.MODID + ".soulSight");
        setRegistryName(DynamicStealth.MODID, "soulSight");
        iconTexture = new ResourceLocation(DynamicStealth.MODID, "potions/soulsight.png");
    }

    @Override
    public boolean isInstant()
    {
        return false;
    }

    @Override
    public void applyAttributesModifiersToEntity(EntityLivingBase entityLivingBaseIn, AbstractAttributeMap attributeMapIn, int amplifier)
    {
        //Should be called "onPotionStart"
        EntityVisionData.potionSoulSightEntities.add(entityLivingBaseIn);
    }

    @Override
    public void removeAttributesModifiersFromEntity(EntityLivingBase entityLivingBaseIn, AbstractAttributeMap attributeMapIn, int amplifier)
    {
        //Should be called "onPotionEnd"
        EntityVisionData.potionSoulSightEntities.remove(entityLivingBaseIn);
    }

    @SideOnly(Side.CLIENT)
    @Override
    public void renderInventoryEffect(int x, int y, PotionEffect effect, Minecraft mc)
    {
        if (mc.currentScreen != null)
        {
            mc.getTextureManager().bindTexture(iconTexture);
            Gui.drawModalRectWithCustomSizedTexture(x + 6, y + 7, 0, 0, 18, 18, 18, 18);
        }
    }

    @SideOnly(Side.CLIENT)
    @Override
    public void renderHUDEffect(int x, int y, PotionEffect effect, Minecraft mc, float alpha)
    {
        mc.getTextureManager().bindTexture(iconTexture);
        Gui.drawModalRectWithCustomSizedTexture(x + 3, y + 3, 0, 0, 18, 18, 18, 18);
    }
}

 

 

Registration (added to event bus in main mod class constructor):

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package com.fantasticsource.dynamicstealth.common.potions;

import com.fantasticsource.dynamicstealth.common.DynamicStealth;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.potion.PotionType;
import net.minecraftforge.event.RegistryEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

public class Potions
{
    @SubscribeEvent
    public static void registerPotions(RegistryEvent.Register<Potion> event)
    {
        event.getRegistry().register(new PotionSoulSight());
    }

    @SubscribeEvent
    public static void registerPotionTypes(RegistryEvent.Register<PotionType> event)
    {
        event.getRegistry().register(new PotionType(DynamicStealth.MODID + ".soulSight", new PotionEffect(new PotionSoulSight(), 200)).setRegistryName(DynamicStealth.MODID, "soulSight"));
    }
}

 

 

Test (For vanilla potions, both debug messages print.  For my own potion, only the server message prints):

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    @SubscribeEvent
    public static void test(TickEvent.PlayerTickEvent event)
    {
        if (MCTools.isClient(event.player.world))
        {
            for (PotionEffect effect : event.player.getActivePotionEffects())
            {
                System.out.println("Client: " + effect.getEffectName());
            }
        }
        else
        {
            for (PotionEffect effect : event.player.getActivePotionEffects())
            {
                System.out.println("Server: " + effect.getEffectName());
            }
        }
    }

 

 

Edited January 29, 2019 by Laike_Endaril
Solved

[V0idWa1k3r]

  On 1/27/2019 at 9:01 PM, Laike_Endaril said:

event.getRegistry().register(new PotionSoulSight());

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  On 1/27/2019 at 9:01 PM, Laike_Endaril said:

event.getRegistry().register(new PotionType(DynamicStealth.MODID + ".soulSight", new PotionEffect(new PotionSoulSight(), 200)).setRegistryName(DynamicStealth.MODID, "soulSight"));

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You can't just instantinate your potion twice and call it good. The potion type needs a reference to an existing potion. To get a reference you can use @ObjectHolder. I don't know how you are applying your potion but if it is through a bottle then this is your issue.

 

  On 1/27/2019 at 9:01 PM, Laike_Endaril said:

if (MCTools.isClient(event.player.world))

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Why do you need this helper? World.isRemote is enough and shorter. The reason I am wary of this is you might have implemented it incorrectly and are mixing the client and the server which would be the cause of your problem(although I don't know how you are adding the potion itself).

 

Fix these two, they are big culprits and if that didn't help proceed with the debugging:

Place a breakpoint in EntityPlayerMP#onNewPotionEffect to see if it is triggered for your potion and one in NetHandlerPlayClient#handleEntityEffect to see if the client is receiving the packet for your potion effect.

[Laike_Endaril]

  On 1/28/2019 at 5:56 AM, V0idWa1k3r said:

You can't just instantiate your potion twice and call it good. The potion type needs a reference to an existing potion. To get a reference you can use @ObjectHolder. I don't know how you are applying your potion but if it is through a bottle then this is your issue.

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Ah, thank you.  This is most likely my issue.  At the time, for whatever reason, I was thinking it would do an equivalency check using the `ResourceLocation`s, which was a bad line of thinking on my part since a `PotionType` can contain multiple `Potion`s.

 

  On 1/28/2019 at 5:56 AM, V0idWa1k3r said:

Why do you need this helper? World.isRemote is enough and shorter.

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The internals of that method simply return world.isRemote.  The only reason I made that method is because I kept mixing up whether "isRemote" is true on client or server, and got tired of going back to look at it every time (though I realize my extra method call makes it a bit less efficient; I don't think the compiler is optimizing it out).

 

I'll try fixing my registries and post the results.

[Laike_Endaril]

Yes, that was the issue.  The potion is synchronizing to the client now, and all I did was make sure the same Potion instance was used in both registration events.

 

My new, working Potions class (which handles the registrations):
 

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package com.fantasticsource.dynamicstealth.common.potions;

import com.fantasticsource.dynamicstealth.common.DynamicStealth;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.potion.PotionType;
import net.minecraftforge.event.RegistryEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

public class Potions
{
    public static final Potion POTION_SOULSIGHT = new PotionSoulSight();
    public static final PotionType POTIONTYPE_SOULSIGHT_NORMAL = new PotionType(DynamicStealth.MODID + ".soulSight", new PotionEffect(POTION_SOULSIGHT, 200)).setRegistryName(DynamicStealth.MODID, "soulSight");

    @SubscribeEvent
    public static void registerPotions(RegistryEvent.Register<Potion> event)
    {
        event.getRegistry().register(POTION_SOULSIGHT);
    }

    @SubscribeEvent
    public static void registerPotionTypes(RegistryEvent.Register<PotionType> event)
    {
        event.getRegistry().register(POTIONTYPE_SOULSIGHT_NORMAL);
    }
}

 

 

I have a couple minor changes to make on it still (such as changing it from a debuff to a buff, so milk doesn't remove it), but it works, and both of my icons are displaying.

 

Edit: Forgot that milk removes buffs as well.  W/e.

Edited January 29, 2019 by Laike_Endaril