83 lines
2.6 KiB
Lua
83 lines
2.6 KiB
Lua
BTtow = {}
|
|
BTtow.Create = {}
|
|
BTtow.Init = {}
|
|
|
|
local TowbarVariantSize = 24
|
|
local TowbarMaxIndex = TowbarVariantSize - 1
|
|
local TowbarFirstZ = 1.0
|
|
local TowbarSlotStep = 0.1
|
|
-- Measured from Towbar.fbx at its original 0.01 script scale. Keep this in
|
|
-- lockstep with the client selector so the enlarged mesh's inner end remains
|
|
-- on the same vehicle-hitbox contact point.
|
|
local TowbarVisualScale = 2.5
|
|
local TowbarModelLength = 0.9714089036
|
|
local TowbarScaledModelLength = TowbarModelLength * TowbarVisualScale
|
|
local TowbarModelHalfLength = TowbarScaledModelLength / 2
|
|
|
|
local function getTowbarFrontEdgeZ(script)
|
|
if not script then return nil end
|
|
|
|
local ok, shape = pcall(function()
|
|
return script:getPhysicsChassisShape()
|
|
end)
|
|
if not ok or not shape then return nil end
|
|
|
|
local shapeOk, shapeZ = pcall(function()
|
|
return shape:z()
|
|
end)
|
|
if not shapeOk or type(shapeZ) ~= "number" or shapeZ <= 0 then
|
|
return nil
|
|
end
|
|
|
|
local centerOk, center = pcall(function()
|
|
return script:getCenterOfMassOffset()
|
|
end)
|
|
if not centerOk or not center then return nil end
|
|
|
|
local zOk, centerZ = pcall(function()
|
|
return center:z()
|
|
end)
|
|
if not zOk or type(centerZ) ~= "number" then return nil end
|
|
|
|
return centerZ + shapeZ / 2
|
|
end
|
|
|
|
local function getTowbarModelSlot(script)
|
|
local frontEdgeZ = getTowbarFrontEdgeZ(script)
|
|
if frontEdgeZ == nil then return nil end
|
|
|
|
-- Model offsets position the mesh origin. Move its center outward so the
|
|
-- towbar's inner end, rather than its center, meets the vehicle hitbox.
|
|
local modelCenterZ = frontEdgeZ + TowbarModelHalfLength
|
|
local index = math.floor(((modelCenterZ - TowbarFirstZ) / TowbarSlotStep) + 0.5)
|
|
return math.max(0, math.min(TowbarMaxIndex, index))
|
|
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
|
|
local modData = vehicle:getModData()
|
|
if modData and modData.towBarModelSwapInProgress then
|
|
return
|
|
end
|
|
if modData and modData["isTowingByTowBar"] and modData["towed"] then
|
|
local script = vehicle:getScript()
|
|
if script then
|
|
local index = getTowbarModelSlot(script)
|
|
local shouldShowOnThisPart = part:getId() == "towbar"
|
|
if shouldShowOnThisPart and index ~= nil then
|
|
part:setModelVisible("towbar" .. index, true)
|
|
end
|
|
end
|
|
end
|
|
end
|