item drop

cannon.lua

@@ -1,4 +1,3 @@
-local has_technic_mod = minetest.get_modpath("technic")
 
 local register_spacecannon = function(def)
 
@@ -42,17 +41,25 @@ local register_spacecannon = function(def)
 
 			local node = minetest.get_node(pos)
 
-			if node.name == "air" then
+			if node.name == "air" or node.name == "vacuum:vacuum" then
 				local objs = minetest.get_objects_inside_radius({x=pos.x,y=pos.y,z=pos.z}, 3)
+				local collided = false
 				for k, obj in pairs(objs) do
-				if obj:get_luaentity() ~= nil and obj:get_luaentity().name ~= self.name then
-					obj:punch(self.object, 1.0, {
-							full_punch_interval=1.0,
-							damage_groups={fleshy=def.range*2},
-						}, nil)
+					if obj:get_luaentity() ~= nil and obj:get_luaentity().name ~= self.name then
+						collided = true
+						obj:punch(self.object, 1.0, {
+								full_punch_interval=1.0,
+								damage_groups={fleshy=def.range*2},
+							}, nil)
 					end
 				end
-			elseif node.name ~= "air" then
+
+				if collided then
+					spacecannon.destroy(pos, def.range)
+					self.object:remove()
+				end
+
+			elseif node.name ~= "air" and node.name ~= "vacuum:vacuum" then
 				-- collision
 				spacecannon.destroy(pos, def.range)
 				self.object:remove()
@@ -109,24 +116,12 @@ local register_spacecannon = function(def)
 			local meta = minetest.get_meta(pos)
 			meta:set_int("powerstorage", 0)
 
-			local inv = meta:get_inventory()
-			inv:set_size("main", 8)
-
-			if has_technic_mod then
-				meta:set_int("HV_EU_input", 0)
-				meta:set_int("HV_EU_demand", 0)
-			end
+			meta:set_int("HV_EU_input", 0)
+			meta:set_int("HV_EU_demand", 0)
 
 			spacecannon.update_formspec(meta)
 		end,
 
-		can_dig = function(pos,player)
-			local meta = minetest.get_meta(pos);
-			local inv = meta:get_inventory()
-			return inv:is_empty("main")
-		end,
-
-
 		technic_run = function(pos, node)
 			local meta = minetest.get_meta(pos)
 			local eu_input = meta:get_int("HV_EU_input")
@@ -156,9 +151,7 @@ local register_spacecannon = function(def)
 
 	})
 
-	if has_technic_mod then
-		technic.register_machine("HV", "spacecannon:cannon_" .. def.color, technic.receiver)
-	end
+	technic.register_machine("HV", "spacecannon:cannon_" .. def.color, technic.receiver)
 
 	minetest.register_craft({
 		output = 'spacecannon:cannon_' .. def.color,

depends.txt

@@ -1,3 +1,3 @@
 default
-technic?
+technic
 mesecons?

init.lua

@@ -5,12 +5,7 @@ spacecannon = {
 		powerstorage = 10000,
 
 		-- charge value in EU
-		powerrequirement = 2500,
-
-		-- fuel item and count
-		power_item = "default:mese_crystal",
-		power_item_count = 1
-
+		powerrequirement = 2500
 
 	}
 }

util.lua

@@ -1,12 +1,8 @@
 
 
 spacecannon.update_formspec = function(meta)
-	meta:set_string("formspec", "size[8,10;]" ..
-		"button_exit[0,2;8,1;fire;Fire]" ..
-
-		"list[context;main;0,3;8,1;]" ..
-
-		"list[current_player;main;0,5;8,4;]")
+	meta:set_string("formspec", "size[8,2;]" ..
+		"button_exit[0,2;8,1;fire;Fire]")
 end
 
 spacecannon.fire = function(pos, color, speed, range)
@@ -15,19 +11,9 @@ spacecannon.fire = function(pos, color, speed, range)
 	local owner = meta:get_string("owner")
 
 	if meta:get_int("powerstorage") < spacecannon.config.powerstorage * range then
+		-- not enough power
+		return
 
-		-- check inventory
-		local inv = meta:get_inventory()
-		local power_item = spacecannon.config.power_item
-		local power_item_count = spacecannon.config.power_item_count * range
-
-		if not inv:contains_item("main", {name=power_item, count=power_item_count}) then
-			minetest.chat_send_player(owner, "Not enough fuel to fire cannon, expected " .. power_item_count .. " " .. power_item)
-			return
-		end
-
-		-- use up items
-		inv:remove_item("main", {name=power_item, count=power_item_count})
 	else
 		-- use power
 		meta:set_int("powerstorage", 0)
@@ -53,10 +39,17 @@ spacecannon.destroy = function(pos,range)
 						return -- fail fast
 					end
 
-					--TODO: replace env* stuff
-					local n = minetest.env:get_node(np)
-					if n.name ~= "air" then
-						minetest.env:remove_node(np)
+					local n = minetest.get_node_or_nil(np)
+
+					if n and n.name ~= "air" then
+						minetest.set_node(np, {name="air"})
+						local itemstacks = minetest.get_node_drops(n.name)
+						for _, itemname in ipairs(itemstacks) do
+							if math.random(5) == 5 then
+								-- chance drop
+								minetest.add_item(np, itemname)
+							end
+						end
 					end
 				end
 			end
@@ -97,4 +90,6 @@ spacecannon.facedir_to_down_dir = function(facing)
 		{x=-1, y=0, z=0},
 		{x=1, y=0, z=0},
 		{x=0, y=1, z=0}})[math.floor(facing/4)]
-end
+end
+
+