I try to hook grass block's random tick event. I want to set a block on the grass when the event fired. I could find any built-in forge event about it. I also try "addSubstitutionAlias" to replace vanilla grass block, but I failed also. Please help me.

There is no event for block updates.

 

How did you try addSubstitutionAlias? What exactly are you trying to do?

I want "tall grass" to grow on grass block naturally(on random block update).

 

and I try this code :

 

in

@Mod.EventHandler

public static void Init(FMLInitializationEvent event) {

                GameRegistry.addSubstitutionAlias("minecraft:grass", Type.BLOCK, new CustomBlock());

}

 

(CustomBlock extends BlockGrass)

You can use World TickEvent and grow tall grass on random grass blocks.

you mean, i should mimic the algorithm of world random tick through WorldTickEvent?