42.18 support

42.18/media/lua/server/BTTow.lua

@@ -0,0 +1,117 @@
+BTtow = {}
+BTtow.Create = {}
+BTtow.Init = {}
+
+local TowbarVariantSize = 24
+local TowbarNormalStart = 0
+local TowbarLargeStart = 24
+local TowbarMaxIndex = TowbarVariantSize - 1
+local VanillaScaleMin = 1.5
+local VanillaScaleMax = 2.0
+
+local function getVehicleModelScale(script)
+    if not script then return nil end
+
+    local ok, result = pcall(function()
+        return script:getModelScale()
+    end)
+    if ok and type(result) == "number" then
+        return result
+    end
+
+    ok, result = pcall(function()
+        local model = script:getModel()
+        if model then
+            return model:getScale()
+        end
+        return nil
+    end)
+    if ok and type(result) == "number" then
+        return result
+    end
+
+    return nil
+end
+
+local function isVanillaScale(script)
+    local modelScale = getVehicleModelScale(script)
+    if modelScale == nil then
+        return true
+    end
+
+    local configuredMin = TowBarMod and TowBarMod.Config and tonumber(TowBarMod.Config.vanillaTowbarModelScaleMin)
+    local configuredMax = TowBarMod and TowBarMod.Config and tonumber(TowBarMod.Config.vanillaTowbarModelScaleMax)
+    local minScale = configuredMin or VanillaScaleMin
+    local maxScale = configuredMax or VanillaScaleMax
+    return modelScale >= minScale and modelScale <= maxScale
+end
+
+local function getTowbarIndexVanilla(script)
+    local z = script:getPhysicsChassisShape():z() / 2 - 0.1
+    local index = math.floor((z * 2 / 3 - 1) * 10)
+    return math.max(0, math.min(TowbarMaxIndex, index))
+end
+
+local function getTowbarIndexSmallScale(script)
+    if not script then return nil end
+
+    local maxAbsTowZ = nil
+    local trailer = script:getAttachmentById("trailer")
+    if trailer then
+        maxAbsTowZ = math.abs(trailer:getOffset():z())
+    end
+    local trailerFront = script:getAttachmentById("trailerfront")
+    if trailerFront then
+        local frontAbsZ = math.abs(trailerFront:getOffset():z())
+        if not maxAbsTowZ or frontAbsZ > maxAbsTowZ then
+            maxAbsTowZ = frontAbsZ
+        end
+    end
+
+    if maxAbsTowZ ~= nil then
+        local index = math.floor((maxAbsTowZ + 0.1 - 1.0) * 10)
+        return math.max(0, math.min(TowbarMaxIndex, index))
+    end
+
+    return nil
+end
+
+local function getTowbarModelSlot(script)
+    local isVanilla = isVanillaScale(script)
+    local index = getTowbarIndexVanilla(script)
+    if not isVanilla then
+        local attachmentIndex = getTowbarIndexSmallScale(script)
+        if attachmentIndex ~= nil then
+            index = attachmentIndex
+        else
+            local offset = TowBarMod and TowBarMod.Config and tonumber(TowBarMod.Config.smallScaleTowbarIndexOffset) or 2
+            index = math.max(0, math.min(TowbarMaxIndex, index + offset))
+        end
+    end
+    return index, isVanilla
+end
+
+function BTtow.Create.towbar(vehicle, part)  
+    if part == nil then return end
+    for j=0, TowbarVariantSize - 1 do
+        part:setModelVisible("towbar" .. j, false)        
+    end
+end
+
+function BTtow.Init.towbar(vehicle, part)
+    if part == nil then return end
+    for j=0, TowbarVariantSize - 1 do
+        part:setModelVisible("towbar" .. j, false)
+    end
+    if vehicle:getModData()["isTowingByTowBar"] and vehicle:getModData()["towed"] then
+        local script = vehicle:getScript()
+        if script then
+            local index, isVanilla = getTowbarModelSlot(script)
+            local partId = part:getId()
+            local shouldShowOnThisPart = (isVanilla and partId == "towbar") or ((not isVanilla) and partId == "towbarLarge")
+            if shouldShowOnThisPart then
+                part:setModelVisible("towbar" .. index, true)
+            end
+        end
+    end
+end