default/player_api/3darmor/skinsdb - dinamically set the model player on client conection

* improves previous commit 3b5cbef6529040620dd8e064f04e082cab5bb436
  and previous 3d_armor commit d7ae85b7f614ae4c37227c7d3a0c78013507ce4f ,
  the problem is that both server and client must be equal protocol, so
  this ugly hack check if this was loaded into FinalMinetest or Multicraft
  to dinamically check client nature and re-registering the model when
  server and client do not have same player models due the colisionbox check
* NOTE: the check already need to check if the engine is old and the server not,
  so the conditional just try to do exact check agains TRUE boolean.
* Closed https://codeberg.org/minenux/minetest-game-minetest/issues/12
  fixed the problem of collisionbox for the lufix player in ugly way but
  much more effectivelly due can be mixed in FinalMinetest and Multicraft
* fix model preview based on client view, not on server engine version
  for the skindb mod

mods/3d_armor/3d_armor/init.lua

@@ -306,13 +306,11 @@ end
 
 -- Armor Player Model
 local modelchar
-local eyeheithg
+local eyeheithg = 1.5 -- must be autodetected at client connection due different protocols
 if armor.is_50 then
 	modelchar = "3d_armor_character50.b3d"
-	eyeheithg = 1.47
 else
 	modelchar = "3d_armor_character40.b3d"
-	eyeheithg = 1.625
 end
 armor.player_register_model(modelchar, {
 	animation_speed = 30,
@@ -353,8 +351,54 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 end)
 
 minetest.register_on_joinplayer(function(player)
-	armor.player_set_model(player, modelchar)
+
 	local player_name = player:get_player_name()
+	local engineold = armor.is_50
+
+	if player_name then
+		local info = minetest.get_player_information(player_name)
+		-- ugly hack due mixed protocols:
+		if info then
+			local test = info.version_string or "5.0"
+			if test:find("0.4") or test:find("4.0")  or test:find("4.1") then
+				engineold = true
+				modelchar = "3d_armor_character40.b3d"
+				eyeheithg = 1.47
+			else
+				engineold = false
+				modelchar = "3d_armor_character50.b3d"
+				eyeheithg = 1.625
+			end
+			-- only refix register model when protocols are mixed, will slow down server
+			if engineold == true and armor.is_50 == true then
+				minetest.log("warning", "[3d_armor] performance impact: mixed protocols DETECTED on player .. "..player_name.." doin re-register model hack")
+				armor.player_register_model(modelchar, {
+					animation_speed = 30,
+					textures = {
+						armor.default_skin..".png",
+						"3d_armor_trans.png",
+						"3d_armor_trans.png",
+					},
+					animations = {
+						stand = {x=0, y=79},
+						lay = {x=162, y=166},
+						walk = {x=168, y=187},
+						mine = {x=189, y=198},
+						walk_mine = {x=200, y=219},
+						sit = {x=81, y=160},
+							-- compatibility w/ the emote mod
+						wave = {x = 192, y = 196, override_local = true},
+						point = {x = 196, y = 196, override_local = true},
+						freeze = {x = 205, y = 205, override_local = true},
+					},
+					eye_height = eyeheithg,
+				})
+			end
+		end
+	end
+
+	armor.player_set_model(player, modelchar)
+	player:set_properties({eye_height = eyeheithg})
 	minetest.after(0.1, function(player)
 		local pplayer = minetest.get_player_by_name(player_name)
 		if pplayer and init_player_armor(player) == false then

mods/default/player.lua

@@ -6,22 +6,70 @@
 local animation_blend = 0
 local hp_player_maximun = tonumber(minetest.settings:get('default_hp_player_maximun')) or 40
 local modelchar
-local eyeheithg
+local eyeheithg = 1.5 -- must be autodetected at client connection due different protocols
+local collsibox = {-0.3, 0.5, -0.3, 0.3, 1.7, 0.3}
 
 local is_50 = minetest.has_feature("object_use_texture_alpha") or nil
 
+function dynamicmodel(player_name)
+
+	if not player_name then
 		if is_50 then
 			core.PLAYER_MAX_HP_DEFAULT = hp_player_maximun
 			modelchar = "character50.b3d"
-	eyeheithg = 1.47
-else
-	core.PLAYER_MAX_HP = hp_player_maximun
-	modelchar = "character40.b3d"
 			eyeheithg = 1.625
+			collsibox = {-0.3, 0.0, -0.3, 0.3, 1.7, 0.3}
+		else
+			modelchar = "character40.b3d"
+			eyeheithg = 1.47
+			core.PLAYER_MAX_HP = hp_player_maximun
+			collsibox = {-0.3, -1, -0.3, 0.3, 0.75, 0.3}
+		end
+		return
+	end
+
+	local engineold = is_50
+	local info = minetest.get_player_information(player_name)
+	-- ugly hack due mixed protocols:
+	if info then
+		local test = info.version_string or "5.0"
+		if test:find("0.4") or test:find("4.0")  or test:find("4.1") then
+			engineold = true
+			modelchar = "character40.b3d"
+			eyeheithg = 1.47
+			collsibox = {-0.3, -1, -0.3, 0.3, 0.75, 0.3}
+		else
+			engineold = false
+			modelchar = "character50.b3d"
+			eyeheithg = 1.625
+			collsibox = {-0.3, 0.0, -0.3, 0.3, 1.5, 0.3}
+		end
+		-- only refix register model when protocols are mixed, will slow down server
+		if engineold == true and is_50 == true then
+			minetest.log("warning", "[default/player_api] performance impact: mixed protocols DETECTED on player .. "..player_name.." doin re-register model hack")
+			default.player_register_model( modelchar, {
+				animation_speed = 30,
+				textures = {"character.png", },
+				animations = {
+					-- Standard animations.
+					stand     = {x = 0,   y = 79},
+					lay       = {x = 162, y = 166},
+					walk      = {x = 168, y = 187},
+					mine      = {x = 189, y = 198},
+					walk_mine = {x = 200, y = 219},
+					sit       = {x = 81,  y = 160},
+				},
+				collisionbox = collsibox,
+				stepheight = 0.6,
+				eye_height = eyeheithg,
+			})
+		end
+	end
 end
 
 default.registered_player_models = { }
 
+dynamicmodel(nil)
 -- Local for speed.
 local models = default.registered_player_models
 
@@ -68,7 +116,7 @@ function default.player_set_model(player, model_name)
 			textures = {"player.png", "player_back.png"},
 			visual = "upright_sprite",
 			visual_size = {x = 1, y = 2},
-			collisionbox = {-0.3, 0.0, -0.3, 0.3, 1.75, 0.3},
+			collisionbox = collsibox,
 			stepheight = 0.6,
 			eye_height = eyeheithg,
 		})
@@ -112,14 +160,16 @@ default.player_register_model( modelchar, {
 		walk_mine = {x = 200, y = 219},
 		sit       = {x = 81,  y = 160},
 	},
-	collisionbox = {-0.3, 0.0, -0.3, 0.3, 1.7, 0.3},
+	collisionbox = collsibox,
 	stepheight = 0.6,
 	eye_height = eyeheithg,
 })
 
 -- Update appearance when the player joins
 minetest.register_on_joinplayer(function(player)
-	default.player_attached[player:get_player_name()] = false
+	local player_name = player:get_player_name()
+	dynamicmodel(player_name)
+	default.player_attached[player_name] = false
 	default.player_set_model(player, modelchar)
 	player:set_local_animation(
 		{x = 0,   y = 79},
@@ -128,7 +178,7 @@ minetest.register_on_joinplayer(function(player)
 		{x = 200, y = 219},
 		30
 	)
-	player:set_properties({hp_max = hp_player_maximun})
+	player:set_properties({hp_max = hp_player_maximun, eye_height = eyeheithg, collisionbox = collsibox})
 end)
 
 minetest.register_on_leaveplayer(function(player)

mods/skins/init.lua

@@ -13,7 +13,6 @@ local S
 
 if minetest.get_translator ~= nil then
 	S = minetest.get_translator("skins")
-	is_50 = true
 else
 	if minetest.get_modpath("intllib") then
 		dofile(minetest.get_modpath("intllib").."/init.lua")
@@ -166,8 +165,13 @@ skins.formspec.main = function(name)
 
 	-- if preview enabled then add player model to formspec (5.4dev only)
 	if skins.preview == true then
+		info = minetest.get_player_information(name)
+		if info then
+			local test = info.version_string or "5"
+			if test:find("0.4.") or test:find("4.0.") or test:find("5.0.") or test:find("5.1.") or test:find("5.2.") or test:find("5.3.") then is_54 = false else is_54 = true end
+		end
 		if is_54 then
-			formspec = formspec .. "model[6,-0.2;1.5,3;player;character.b3d;"
+			formspec = formspec .. "model[6,-0.2;1.5,3;player;character50.b3d;"
 				.. skins.skins[name] .. ".png;0,180;false;true]"
 		else
 			local head = "[combine:8x8:-8,-8="..skins.skins[name]..".png"

mods/skins/mod.conf

@@ -1,4 +1,4 @@
 name = skins
-depends = default, player_api
-optional_depends = sfinv, inventory_plus, intllib, unified_inventory
+depends = default
+optional_depends = sfinv, inventory_plus, intllib, unified_inventory, player_api
 description = SKIN manager mod, Simple_Skin modified mod that allow players to set their individual skins.