Make falling anvils crush some nodes

GROUPS.md

@@ -29,6 +29,7 @@ Please read <http://minecraft.gamepedia.com/Breaking> to learn how digging times
 
 ### Groups for interactions
 
+* `crush_after_fall=1`: For falling nodes. These will crush whatever they hit after falling, not dropping as an item
 * `dig_by_water=1`: Blocks with this group will drop when they are near flowing water
 * `destroy_by_lava_flow=1`: Blocks with this group will be destroyed by flowing lava
 * `dig_by_piston=1`: Blocks which will drop as an item when pushed by a piston. They also cannot be pulled by sticky pistons

mods/ENTITIES/mcl_falling_nodes/init.lua

@@ -92,7 +92,7 @@ minetest.register_entity(":__builtin:falling_node", {
 			if n2.name == "mcl_portals:portal_end" then
 				-- TODO: Teleport falling node. 
 
-			elseif nd and nd.buildable_to == true then
+			elseif (nd and nd.buildable_to == true) or minetest.get_item_group(self.node.name, "crush_after_fall") ~= 0 then
 				-- Replace destination node if it's buildable to
 				minetest.remove_node(np)
 				-- Run script hook

mods/ITEMS/mcl_anvils/init.lua

@@ -1,5 +1,5 @@
 local anvildef = {
-	groups = {pickaxey=1, falling_node=1, deco_block=1, anvil=1},
+	groups = {pickaxey=1, falling_node=1, crush_after_fall=1, deco_block=1, anvil=1},
 	tiles = {"mcl_anvils_anvil_top_damaged_0.png^[transformR90", "mcl_anvils_anvil_base.png", "mcl_anvils_anvil_side.png"},
 	paramtype = "light",
 	sunlight_propagates = true,