hpchange: create hpchange clientmod

clientmods/hpchange/init.lua

@@ -0,0 +1,59 @@
+local widget
+local last_hp
+
+local function show_widget()
+    widget = minetest.localplayer:hud_add({
+        hud_elem_type   = "text",
+        name            = "HP Change",
+        text            = "Last HP change: ",
+        number          = 0x00FF00,
+        direction       = 0,
+        position        = {x = 0.85, y = 0.8},
+        scale           = {x = 0.9, y = 0.9},
+        alignment       = {x = 1, y = 1},
+        offset          = {x = 0, y = 0}
+    })
+end
+
+local function update_hud(delta)
+    if minetest.localplayer ~= nil and delta ~= 0 then
+        if widget == nil then
+            show_widget()
+        end
+
+        local num = tostring(math.abs(delta))
+        if delta < 0 then
+            num = "-" .. num
+        else
+            num = "+" .. num
+        end
+
+        minetest.localplayer:hud_change(widget, "text", "Last HP change: " .. num)
+
+        if delta > 0 then
+            minetest.localplayer:hud_change(widget, "number", 0x00FF00)
+        else
+            minetest.localplayer:hud_change(widget, "number", 0xFF0000)
+        end
+
+        if last_hp ~= nil then
+            last_hp = last_hp + delta
+        end
+    end
+end
+
+-- health decrease (potential)
+minetest.register_on_damage_taken(function(hp)
+    update_hud(-hp)
+end)
+
+-- health increase
+minetest.register_on_hp_modification(function(hp)
+    if last_hp == nil and minetest.localplayer ~= nil then
+        last_hp = minetest.localplayer:get_hp()
+    end
+
+    if last_hp ~= nil and last_hp <= hp then
+        update_hud(hp - last_hp)
+    end
+end)

clientmods/hpchange/mod.conf

@@ -0,0 +1,2 @@
+name = hpchange
+description = Display last hit's damage (in half hearts).

clientmods/mods.conf

@@ -17,3 +17,4 @@ load_mod_esp = true
 load_mod_antigone = false
 load_mod_dte = true
 load_mod_flightaura = false
+load_mod_hpchange = true