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

mods/artifact_characters/init.lua

@@ -52,14 +52,21 @@ function ns.swap_character(m)
         ns.apply_vix(m)
     end
     
-    if artifact.sidekick.ref then
+    -- We don't need to have the sidekick entity during testing.
+    if artifact.sidekick.pos or not artifact.debug then
         -- `m.pos` includes eye_height, and we don't want that here.
         local pos = m.object:get_pos()
         local yaw = m.yaw
         local pitch = m.pitch
-        m.object:set_pos(artifact.sidekick.ref.object:get_pos())
+        if not artifact.sidekick.pos then
+            artifact.sidekick.pos = pos
+        end
+        m.object:set_pos(artifact.sidekick.pos)
         m.object:set_look_horizontal(artifact.sidekick.yaw)
         m.object:set_look_vertical(artifact.sidekick.pitch)
+        if not artifact.sidekick.ref then
+            minetest.add_entity(pos, "artifact:sidekick")
+        end
         artifact.sidekick.ref.object:set_pos(pos)
         artifact.sidekick.ref.object:set_yaw(yaw)
         artifact.sidekick.ref.object:set_bone_override("Head", m.object:get_bone_override("Head"))
@@ -76,6 +83,7 @@ function ns.swap_character(m)
             }
             if e.blackrod then
                 e.blackrod:remove()
+                e.blackrod = nil
             end
         else
             e.object:set_properties {
@@ -101,7 +109,6 @@ include "key.lua"
 include "vix.lua"
 
 artifact.sidekick = setmetatable(minetest.deserialize(db:get("sidekick") or "return nil") or {
-    pos = vector.zero(),
     pitch = 0,
     yaw = 0,
     character = "vix",
@@ -121,12 +128,14 @@ minetest.register_entity(":artifact:sidekick", {
     initial_properties = {
         visual = "mesh",
         mesh = "artifact_character.gltf",
-        textures = {"artifact_key.png"},
+        textures = {"artifact_vix.png"},
+        visual_size = vector.new(1,1,1) *0.8,
         physical = true,
         collisionbox = {
             -0.3, 0,-0.3,
             0.3, 1.77, 0.3
-        }
+        },
+        collide_with_objects = false
     },
     _interact_marker_offset = function() return vector.new(0, 1.1,0) end,
     _interact_time = 0.4,
@@ -134,7 +143,7 @@ minetest.register_entity(":artifact:sidekick", {
         if data then
             extend(e, minetest.deserialize(data) or {})
         end
-        if artifact.sidekick.character == "vix" then
+        if artifact.sidekick.character == "key" then
             e.object:set_properties {
                 textures = {"artifact_key.png"},
                 visual_size = vector.new(1,1,1) *0.88
@@ -149,9 +158,9 @@ minetest.register_entity(":artifact:sidekick", {
         if artifact.sidekick.ref then
             e.object:remove()
             return
-        else
-            artifact.sidekick.ref = e
         end
+        artifact.sidekick.pos = e.object:get_pos()
+        artifact.sidekick.ref = e
     end,
     on_deactivate = function(e)
         artifact.sidekick.ref = nil
@@ -161,6 +170,10 @@ minetest.register_entity(":artifact:sidekick", {
             cahracter = e.character
         }
     end,
+    -- We need this to ensure that the stored position takes gravity into account.
+    on_step = function(e)
+        artifact.sidekick.pos = e.object:get_pos()
+    end,
     on_interact = function(e, m)
         ns.swap_character(m)
     end

mods/artifact_characters/key.lua

@@ -2,5 +2,33 @@ local ns = artifact
 
 
 function ns.do_whack(m)
-    
+    if m.pointed_node then
+        local pos = m.pointed_node.under
+        local node = minetest.get_node(pos)
+        local def = minetest.registered_nodes[node.name]
+        if not def.groups.whackable then return end
+        minetest.remove_node(pos)
+        minetest.add_particlespawner {
+            pos = {
+                min = pos:offset(-0.5, -0.5, -0.5),
+                max = pos:offset(0.5, 0.5, 0.5)
+            },
+            vel = {
+                min = vector.new(-1, 0, -1) *1.5,
+                max = vector.new(1, 2, 1) *1.5
+            },
+            acc = vector.new(0,-9.81,0),
+            collisiondetection = true,
+            amount = 50,
+            node = {name = node.name},
+            time = 0.1
+        }
+    elseif m.pointed_obj and m.pointed_obj.on_whack then
+        if m.pointed_obj:on_whack() then
+            -- For use in artifact_help.
+            if artifact.on_whacked then
+                artifact.on_whacked()
+            end
+        end
+    end
 end

mods/artifact_characters/vix.lua

@@ -6,7 +6,7 @@ minetest.register_entity(":artifact:burst", {
         textures = {"blank.png"},
         pointable = false,
         physical = true,
-        collide_with_objects = false,
+--        collide_with_objects = false,
         collisionbox = {
             -0.2, -0.2, -0.2,
             0.2, 0.2, 0.2
@@ -49,6 +49,13 @@ minetest.register_entity(":artifact:burst", {
                 time = 0.1,
             }
             e.object:remove()
+            if movement.collisions[1].type == "node" then
+                local pos = movement.collisions[1].node_pos
+                local name = minetest.get_node(pos).name
+                if minetest.registered_nodes[name].on_impact then
+                    minetest.registered_nodes[name].on_impact(pos)
+                end
+            end
         end
     end,
     impulse = function(e, vel)