I'm trying to fix a few spawn bypasses in mods, notably ArsMagica2.

For block placing, I was able to use ForgeEventFactory.onPlayerBlockPlace and ForgeEventFactory.onPlayerMultiBlockPlace. It's a bit tedious, but it does the job.

 

What about entity attack? Notably, how can I detect if a player can attack an entity in an area?

There's also an event (BlockBreakEvent?) for breaking blocks, for reference.

Thanks for your answers!

 

Original code is here: https://github.com/LemADEC/ArsMagica2/blob/master/src/main/java/am2/AMEventHandler.java#L583

 

@SubscribeEvent
public void onEntityHurt(LivingHurtEvent event){
...
	Entity entitySource = event.source.getSourceOfDamage();
	if ( entitySource instanceof EntityPlayer
	  && ((EntityPlayer)entitySource).inventory.armorInventory[2] != null
	  && ((EntityPlayer)entitySource).inventory.armorInventory[2].getItem() == ItemsCommonProxy.earthGuardianArmor
	  && ((EntityPlayer)entitySource).getCurrentEquippedItem() == null ){
		event.ammount += 4;

		double deltaZ = event.entityLiving.posZ - entitySource.posZ;
		double deltaX = event.entityLiving.posX - entitySource.posX;
		double angle = Math.atan2(deltaZ, deltaX);
		double speed = ((EntityPlayer)entitySource).isSprinting() ? 3 : 2;
		double vertSpeed = ((EntityPlayer)entitySource).isSprinting() ? 0.5 : 0.325;

		if (event.entityLiving instanceof EntityPlayer){
			AMNetHandler.INSTANCE.sendVelocityAddPacket(event.entityLiving.worldObj, event.entityLiving, speed * Math.cos(angle), vertSpeed, speed * Math.sin(angle));
		}else{
			event.entityLiving.motionX += (speed * Math.cos(angle));
			event.entityLiving.motionZ += (speed * Math.sin(angle));
			event.entityLiving.motionY += vertSpeed;
		}
		event.entityLiving.worldObj.playSoundAtEntity(event.entityLiving, "arsmagica2:spell.cast.earth", 0.4f, event.entityLiving.worldObj.rand.nextFloat() * 0.1F + 0.9F);
	}
...
}

 

 

I've tried using AttackEntityEvent as such:

 

...
	Entity entitySource = event.source.getSourceOfDamage();
	if ( entitySource instanceof EntityPlayer
	  && ((EntityPlayer)entitySource).inventory.armorInventory[2] != null
	  && ((EntityPlayer)entitySource).inventory.armorInventory[2].getItem() == ItemsCommonProxy.earthGuardianArmor
	  && ((EntityPlayer)entitySource).getCurrentEquippedItem() == null){
		if (!MinecraftForge.EVENT_BUS.post(new AttackEntityEvent((EntityPlayer)entitySource, event.entity))){
			event.ammount += 4;

			double deltaZ = event.entityLiving.posZ - entitySource.posZ;
			double deltaX = event.entityLiving.posX - entitySource.posX;
			double angle = Math.atan2(deltaZ, deltaX);
			double speed = ((EntityPlayer)entitySource).isSprinting() ? 3 : 2;
			double vertSpeed = ((EntityPlayer)entitySource).isSprinting() ? 0.5 : 0.325;

			if (event.entityLiving instanceof EntityPlayer){
				AMNetHandler.INSTANCE.sendVelocityAddPacket(event.entityLiving.worldObj, event.entityLiving, speed * Math.cos(angle), vertSpeed, speed * Math.sin(angle));
			}else{
				event.entityLiving.motionX += (speed * Math.cos(angle));
				event.entityLiving.motionZ += (speed * Math.sin(angle));
				event.entityLiving.motionY += vertSpeed;
			}
			event.entityLiving.worldObj.playSoundAtEntity(event.entityLiving, "arsmagica2:spell.cast.earth", 0.4f, event.entityLiving.worldObj.rand.nextFloat() * 0.1F + 0.9F);
		}
	}
...

 

Sadly, it doesn't seem to get cancelled whether I'm inside or outside a protected area (spawn with WorldGuard in my case).