Hi! I have a problem: I have to create a firework spawner from a custom firework ItemStack. Can you help me?
You might have to use some NBT manipulations to get this done (I have just released an NBT library that I will now shamelessly plug, check my signature ). If you use the BlockState io delegate from the api you can set the NBT data on a spawner after you place it in the world. The tags that you will need to set are described here http://minecraft.gamepedia.com/Monster_Spawner#Data_values. If you have any trouble working with the API please let me know. I am still trying to get some people using it to see how others find using it