Electroblob77
82 lines
3.6 KiB
Java
82 lines
3.6 KiB
Java
package electroblob.wizardry.potion;
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import net.minecraft.entity.EntityLivingBase;
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import net.minecraft.entity.player.EntityPlayerMP;
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import net.minecraft.network.play.server.SPacketEntityEffect;
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import net.minecraft.network.play.server.SPacketRemoveEntityEffect;
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import net.minecraftforge.event.entity.living.PotionEvent;
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import net.minecraftforge.fml.common.Mod;
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import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
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/**
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* Interface for potion effects that need syncing to ensure client and server side are consistent. Simply implement
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* this interface and the potion will be synced automatically.
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*
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* @author Electroblob
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* @since Wizardry 1.2
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*/
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@Mod.EventBusSubscriber
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public interface ISyncedPotion {
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/** The distance from an entity with this effect within which players will receive potion update packets. */
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double SYNC_RADIUS = 64;
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/** Returns true if this potion should sync with nearby clients when added to / removed from an entity and on
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* expiry, false if not. The host entity is provided in case syncing is entity-dependent. Defaults to true. */
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default boolean shouldSync(EntityLivingBase host){
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return true;
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}
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// The following event handlers fix the inconsistencies caused by clients not syncing correctly
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// These packets are only sent for players with potion effects in vanilla, and only to that player's client
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// This one is only actually necessary if the effect gets added via a server-side method e.g. commands
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// Unfortunately there's no way of checking that, so we'll just have to live with the extra packets
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@SubscribeEvent
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public static void onPotionAddedEvent(PotionEvent.PotionAddedEvent event){
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if(event.getPotionEffect().getPotion() instanceof ISyncedPotion
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&& ((ISyncedPotion)event.getPotionEffect().getPotion()).shouldSync(event.getEntityLiving())){
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if(!event.getEntityLiving().world.isRemote){
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event.getEntityLiving().world.playerEntities.stream()
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.filter(p -> p.getDistanceSq(event.getEntityLiving()) < SYNC_RADIUS * SYNC_RADIUS)
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// Apparently unchecked casting in a lambda expression doesn't generate a warning. Who knew?
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// (We know this cast is safe though)
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.forEach(p -> ((EntityPlayerMP)p).connection.sendPacket(new SPacketEntityEffect(
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event.getEntity().getEntityId(), event.getPotionEffect())));
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}
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}
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}
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@SubscribeEvent
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public static void onPotionExpiryEvent(PotionEvent.PotionExpiryEvent event){
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if(event.getPotionEffect() != null && event.getPotionEffect().getPotion() instanceof ISyncedPotion
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&& ((ISyncedPotion)event.getPotionEffect().getPotion()).shouldSync(event.getEntityLiving())){
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if(!event.getEntityLiving().world.isRemote){
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event.getEntityLiving().world.playerEntities.stream()
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.filter(p -> p.getDistanceSq(event.getEntityLiving()) < SYNC_RADIUS * SYNC_RADIUS)
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.forEach(p -> ((EntityPlayerMP)p).connection.sendPacket(new SPacketRemoveEntityEffect(
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event.getEntity().getEntityId(), event.getPotionEffect().getPotion())));
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}
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}
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}
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@SubscribeEvent
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public static void onPotionRemoveEvent(PotionEvent.PotionRemoveEvent event){
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if(event.getPotionEffect() != null && event.getPotionEffect().getPotion() instanceof ISyncedPotion
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&& ((ISyncedPotion)event.getPotionEffect().getPotion()).shouldSync(event.getEntityLiving())){
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if(!event.getEntityLiving().world.isRemote){
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event.getEntityLiving().world.playerEntities.stream()
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.filter(p -> p.getDistanceSq(event.getEntityLiving()) < SYNC_RADIUS * SYNC_RADIUS)
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.forEach(p -> ((EntityPlayerMP)p).connection.sendPacket(new SPacketRemoveEntityEffect(
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event.getEntity().getEntityId(), event.getPotionEffect().getPotion())));
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}
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}
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}
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}
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