I am really working in waters a lot of modders tend to ignore or avoid.  Might as well get to the point, I am trying to get my mob to convert into a different mob.  Yes it is a zombie like creature.

zombie = (new EntityNuclearZombie(ModLoader.getMinecraftInstance().theWorld));
zombie.setLocationAndAngles(this.posX, this.posY, this.posZ, ModLoader.getMinecraftInstance().theWorld.rand.nextFloat() * 360.0F, 0.0F);
ModLoader.getMinecraftInstance().theWorld.spawnEntityInWorld(zombie);

This is the code that spawns the new entity and is surrounded by a if statement that check if the entity is dead.  The if statement is in the onUpdate method.  I have a boolean variable that determines if the creature converted.  That makes sure the mob doesn't spawn a huge group of other mobs.  What can/would I need to add to have it so it check the mob that attacked it?  I know of the getLastAttackEntity method but I can't seem to get it to work.  It either spawns a "zombie" all the time or never.

Try checking out the creeper/skeleton code. They've got stuff that uses that.

Why don't you just spawn an entity and set the current entity dead? Simple.

 

You can do that in the setDead() function. Override it if you need to.

Already fixed it with what atrain99 said.  All is good.  The infection can spread

Already fixed it with what atrain99 said.  All is good.  The infection can spread

I actually fixed somebody else's problem?!?!