Add ghoststone, crafted like removestone, with steel ingots at the corners. Trapstone disappears upon mesecon signals, but unlike removestone, reappears after the mesecon signal turns off.

mesecons_random/init.lua

@@ -1,26 +1,70 @@
--- REMOVE_STONE
+-- REMOVESTONE
 
 minetest.register_node("mesecons_random:removestone", {
 	tiles = {"jeija_removestone.png"},
 	inventory_image = minetest.inventorycube("jeija_removestone_inv.png"),
-	material = minetest.digprop_stonelike(1.0),
-	groups = {cracky=3, mesecon = 2},
+	groups = {cracky=3, mesecon=2},
 	description="Removestone",
 })
 
 mesecon:register_effector(nil, "mesecons_random:removestone")
 
 minetest.register_craft({
-	output = '"mesecons_random:removestone" 4',
+	output = 'mesecons_random:removestone 4',
 	recipe = {
-		{'', '"default:cobble"',''},
-		{'"default:cobble"', '"group:mesecon_conductor_craftable"', '"default:cobble"'},
-		{'', '"default:cobble"',''},
+		{"", "default:cobble", ""},
+		{"default:cobble", "group:mesecon_conductor_craftable", "default:cobble"},
+		{"", "default:cobble", ""},
 	}
 })
 
 mesecon:register_on_signal_on(function(pos, node)
-	if node.name=="mesecons_random:removestone" then
+	if node.name == "mesecons_random:removestone" then
 		minetest.env:remove_node(pos)
 	end
 end)
+
+-- ghoststone
+
+minetest.register_node("mesecons_random:ghoststone", {
+	description="ghoststone",
+	tiles = {"jeija_ghoststone.png"},
+	is_ground_content = true,
+	inventory_image = minetest.inventorycube("jeija_ghoststone_inv.png"),
+	groups = {cracky=3, mesecon=2},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node("mesecons_random:ghoststone_active", {
+	drawtype = "airlike",
+	pointable = false,
+	walkable = false,
+	diggable = false,
+	sunlight_propagates = true,
+	groups = {mesecon=2},
+})
+
+mesecon:register_effector("mesecons_random:ghoststone_active", "mesecons_random:ghoststone")
+
+minetest.register_craft({
+	output = 'mesecons_random:ghoststone 4',
+	recipe = {
+		{"default:steel_ingot", "default:cobble", "default:steel_ingot"},
+		{"default:cobble", "group:mesecon_conductor_craftable", "default:cobble"},
+		{"default:steel_ingot", "default:cobble", "default:steel_ingot"},
+	}
+})
+
+mesecon:register_on_signal_on(function(pos, node)
+	if node.name == "mesecons_random:ghoststone" then
+		minetest.env:add_node(pos, {name="mesecons_random:ghoststone_active"})
+		nodeupdate(pos)
+	end
+end)
+
+mesecon:register_on_signal_off(function(pos, node)
+	if node.name == "mesecons_random:ghoststone_active" then
+		minetest.env:add_node(pos, {name="mesecons_random:ghoststone"})
+		nodeupdate(pos)
+	end
+end)