I am trying to make the player shoot upwards when my projectile hits it. This works on other entities, but not on other players.

 

I use

entity.addVelocity()

for shooting them upwards.

 

However, when I added a line of code to do damage after that, the player shot up and took damage. What's going on?

 

I use

entity.attackEntityFrom()

for the damage. I use my custom damage source for the param.

 

Thanks

This is all from memory, so it may not be entirely accurate: when the player takes damage, there is a field that gets set to true - something like #velocityChanged - that acts as a flag for the server to notify the client of specific motion changes.

 

You can accomplish the same thing by sending a motion packet to the client or running your code on both sides.

How would I send a packet to the client?

if (target instanceof EntityPlayerMP && !target.worldObj.isRemote) {
((EntityPlayerMP) target).playerNetServerHandler.sendPacket(new S12PacketEntityVelocity(target));
}