Add a chat system that actually looks nice.

mods/artifact_chat/init.lua

@@ -0,0 +1,149 @@
+local ns = artifact
+
+local hud_pop_times = {}
+
+function ns.push_chat_message(msg, sender, splash, duration)
+    for name, m in pairs(artifact.players) do
+        local box = {}
+        local w = minetest.get_player_window_information(name).size.x
+        local y = (#m.chat *75)
+        box.left = artifact.hud_add(m, {
+            type = "image",
+            name = ""..math.random(),
+            pos = {x=0,y=0},
+            offset={x=8,y=12 +y},
+            align = {x=1,y=1},
+            scale = {x=4,y=4},
+            image = "artifact_chat_box_side.png"
+        })
+        box.middle = artifact.hud_add(m, {
+            type = "image",
+            name = ""..math.random(),
+            pos = {x=0,y=0},
+            offset={x=12,y=12 +y},
+            align = {x=1,y=1},
+            scale = {x=w -24,y=4},
+            image = "artifact_chat_box_middle.png"
+        })
+        box.right = artifact.hud_add(m, {
+            type = "image",
+            name = ""..math.random(),
+            pos = {x=1,y=0},
+            offset={x=-8,y=12 +y},
+            align = {x=-1,y=1},
+            scale = {x=4,y=4},
+            image = "artifact_chat_box_side.png"
+        })
+        if sender then msg = "["..sender.."] "..msg end
+        local i = 0
+        local str = ""
+        for x in msg:gmatch("(%s*[^%s]+%s*)") do
+            if (#str +#x) *8 < w -100 then
+                str = str..x
+            else
+                box["text"..i] = artifact.hud_add(m, {
+                    type = "text",
+                    name = ""..math.random(),
+                    pos = {x=0,y=0},
+                    padding_y = 10 +(i *18),
+                    offset={x=64,y=22 +(i *18) +y},
+                    align = {x=1,y=1},
+                    text = str
+                })
+                str = x
+                i = i +1
+            end
+        end
+        box["text"..i] = artifact.hud_add(m, {
+            type = "text",
+            name = ""..math.random(),
+            pos = {x=0,y=0},
+            padding_y = 10 +(i *18),
+            offset={x=64,y=22 +(i *18) +y},
+            align = {x=1,y=1},
+            text = str
+        })
+--        if sender then
+--            box.name = artifact.hud_add(m, {
+--                type = "text",
+--                pos = {x=0,y=0},
+--                padding_y = 30,
+--                offset={x=15,y=42 +y},
+--                align = {x=1,y=1},
+--                text = sender
+--            })
+--        end
+        if splash then
+            box.splash = artifact.hud_add(m, {
+                type = "image",
+                pos = {x=0,y=0},
+                padding_y = 25,
+                offset={x=32,y=37 +y},
+                align = {x=0,y=0},
+--                scale = {x=0.5,y=0.5},
+                image = splash
+            })
+        end
+        m.chat[#m.chat +1] = box
+    end
+    -- Ensure that messages auto-pop strictly in order, in case of different durations.
+    -- If a message would cause a pop before its predecessor expires, its pop time is
+    -- pushed forward to immediately follow that of the last visible message.
+    table.insert(hud_pop_times, math.max(hud_pop_times[#hud_pop_times] or 0, (duration or 15) *1000000 +minetest.get_us_time()))
+    -- Track pop jobs to get the number of active messages, since the actual HUD is stored in each player.
+    if #hud_pop_times > 5 then
+        ns.pop_chat_message()
+    end
+    -- Write the message to the chat log. (Note that `msg` is updated above to include the sender name, if present.)
+    minetest.chat_send_all(msg)
+end
+
+function ns.pop_chat_message()
+    table.remove(hud_pop_times, 1)
+    for _, m in pairs(artifact.players) do
+        for _, x in pairs(m.chat[1]) do
+            x:remove(m)
+        end
+        table.remove(m.chat, 1)
+        for i, x in ipairs(m.chat) do
+            local y = (i -1) *75
+            for _, el in pairs(x) do
+                el:animate {
+                    offset = {
+                        value = {x=el.offset.x, y=12 +y +(el.padding_y or 0)},
+                        duration = 0.3
+                    }
+                }
+            end
+        end
+    end
+end
+
+
+minetest.register_on_chat_message(function(name, msg)
+    ns.push_chat_message(msg, name)
+    return true
+end)
+
+minetest.register_globalstep(function()
+    local time = minetest.get_us_time()
+    if time >= (hud_pop_times[1] or math.huge) then
+        ns.pop_chat_message()
+    end
+end)
+
+if artifact.debug then
+
+    minetest.register_chatcommand("key", {
+        func = function(name, args)
+            ns.push_chat_message(args, "Key", "artifact_key_splash_low.png")
+        end
+    })
+    
+    minetest.register_chatcommand("vix", {
+        func = function(name, args)
+            ns.push_chat_message(args, "Vix", "artifact_vix_splash_low.png")
+        end
+    })
+
+end

mods/artifact_chat/mod.conf

@@ -0,0 +1,2 @@
+name = artifact_chat
+depends = artifact_hud

mods/artifact_hud/init.lua

@@ -77,6 +77,11 @@ function ns.hud_add(m, def)
     if type.defaults then
         def = extend(table.copy(type.defaults), def)
     end
+    -- Create a random name if none is given, since the
+    -- assumption is that the user doesn't care about the name.
+    if not def.name then
+        def.name = ""..math.random()
+    end
     local el
     if m.hud[def.name] then
         el = m.hud[def.name]
@@ -222,8 +227,11 @@ ns.register_hud_type {
         end
     end,
     remove = function(e, m)
+        m.hud[e.name] = nil
         m.object:hud_remove(e._id)
         e._id = nil
+        -- Prevent ongoing animations from attempting to change a nonexistent element.
+        e.update = function() end
     end
 }
 
@@ -270,5 +278,7 @@ ns.register_hud_type {
         m.hud[e.name] = nil
         m.object:hud_remove(e._id)
         e._id = nil
+        -- Prevent ongoing animations from attempting to change a nonexistent element.
+        e.update = function() end
     end
 }

mods/artifact_player/init.lua

@@ -47,11 +47,13 @@ Player = setmetatable({
             breathbar = false,
             hotbar = artifact.debug,
             minimap = false,
-            basic_debug = false
+            basic_debug = false,
+            chat = false, -- We provide our own implementation of the chat HUD.
         }
         
         m.hud = {}
         m.poi = {}
+        m.chat = {}
         m:create_hud()
         
         m:set_hotbar_size(8)