Add multi-signal doors, basic device deployment, and a target trigger.

mods/artifact_devices/init.lua

@@ -0,0 +1,37 @@
+
+
+minetest.register_entity(":artifact:device_block", {
+    initial_properties = {
+        visual = "cube",
+        textures = {"artifact_device_block.png", "artifact_device_block.png", "artifact_device_block.png", "artifact_device_block.png", "artifact_device_block.png", "artifact_device_block.png"},
+        use_texture_alpha = true,
+        glow = 8,
+        static_save = false,
+    },
+    _grabbable = true,
+    on_activate = function(e)
+        e.object:set_armor_groups{immortal = 1}
+    end,
+    on_hit = function(e, m)
+        artifact.grab_device(m, e)
+    end,
+})
+
+
+function artifact.grab_device(m, e)
+    e._no_interact = true
+    m._grabbed_item = e.object
+    m._on_ungrab = function()
+        e._no_interact = nil
+    end
+end
+
+function artifact.summon_device(m, device)
+    local e
+    if device == "block" then
+        e = minetest.add_entity(m.pos, "artifact:device_block"):get_luaentity()
+    end
+    if e then
+        artifact.grab_device(m, e)
+    end
+end