Daikoku PA: lift mainline over the apron, rebuild both ramps
The PA ring road and the expressway mainline were both at ground level, so the ring parapet stood INSIDE the carriageway (measured -10.0 studs of vertical overlap: a wall in the middle of the road). Reference photos of the real Daikoku Futo PA show the expressway flying OVER the parking apron on pillars, with the PA at ground level and ramps climbing up to meet it. Rebuilt to match: - mainline lifted 38 studs through the junction, eased in/out (max 5.26% grade, within real expressway limits) - PA ring + apron stay at ground level; legacy PARingPillar props removed - both on/off ramps regraded over the full rise with smoothstep easing, segments overlapped 3 studs so wheels can't catch a seam, plus support pillars and edge kerbs where the deck is high Verified in-engine against built parts (tools/diag_daikoku.luau), not just source: clearance now +28.0 studs, both ramps continuous (max step 5.62, no gaps). tools/plot_daikoku.py renders the plan/section for comparison.
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--[[
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diag_wheelroot.luau -- two suspected bugs in the shell wheel re-hang
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(CarManager ~line 585-641).
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(1) ROOT CHOICE. Line 589 picks
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root = w:IsA("BasePart") and w or w:FindFirstChildWhichIsA("BasePart", true)
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For a wheel group that is a Model, FindFirstChildWhichIsA returns an
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ARBITRARY first BasePart -- a rotor, caliper or hub, not necessarily
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the tyre. Line 621 then does delta = phys.Position - root.Position and
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shifts the whole group, making THAT part concentric with the axle. If
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root is not the tyre centre, the visible tyre is displaced by the
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root-to-tyre offset. User reports rx7_fc wheels "sticking out from the
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side of the car", which is this signature.
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(2) SURVIVING OUTSIDE WELDS. Line 605 only scans shell:GetDescendants()
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for welds to cut. Any weld parented OUTSIDE the shell (on the model,
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on body, etc.) that ties a wheel part to the bodywork survives, which
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would rigidly glue the wheel to the chassis and pin the knuckle --
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the measured steering lock.
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Reports, per wheel group: which part was chosen as root, how far that root
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sits from the group's true centre, and any surviving weld from the group
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to a part outside it.
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]]
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local ServerScriptService = game:GetService("ServerScriptService")
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local ReplicatedStorage = game:GetService("ReplicatedStorage")
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local RunService = game:GetService("RunService")
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local out = {}
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local function log(...)
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local parts = {}
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for i = 1, select("#", ...) do
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parts[#parts + 1] = tostring((select(i, ...)))
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end
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table.insert(out, table.concat(parts, " "))
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end
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local Shared = ReplicatedStorage:FindFirstChild("Shared")
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local Cars = require(Shared.Cars)
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local Chassis = require(Shared.Chassis)
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local orig = ServerScriptService:FindFirstChild("Server", true):FindFirstChild("CarManager")
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local cm = orig:Clone()
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cm.Parent = orig.Parent
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local CarManager = require(cm)
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-- ---------------------------------------------------------------- template
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log("=== TEMPLATE wheel groups: what does line 589 pick as root? ===")
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log(string.format("%-12s %-5s %-16s %8s %8s", "car", "grp", "root picked", "off|X|", "nParts"))
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for _, t in ipairs(ReplicatedStorage.CarModels:GetChildren()) do
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local wg = t:FindFirstChild("Wheels")
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if wg then
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for _, w in ipairs(wg:GetChildren()) do
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local root = w:IsA("BasePart") and w or w:FindFirstChildWhichIsA("BasePart", true)
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-- true centre of the group = AABB centre of all its parts
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local lo = Vector3.new(math.huge, math.huge, math.huge)
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local hi = -lo
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local n = 0
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if w:IsA("BasePart") then
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lo, hi, n = w.Position, w.Position, 1
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end
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for _, d in ipairs(w:GetDescendants()) do
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if d:IsA("BasePart") then
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lo = Vector3.new(
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math.min(lo.X, d.Position.X),
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math.min(lo.Y, d.Position.Y),
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math.min(lo.Z, d.Position.Z)
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)
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hi = Vector3.new(
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math.max(hi.X, d.Position.X),
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math.max(hi.Y, d.Position.Y),
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math.max(hi.Z, d.Position.Z)
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)
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n += 1
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end
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end
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if root and n > 0 then
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local centre = (lo + hi) / 2
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local off = root.Position - centre
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log(string.format("%-12s %-5s %-16s %8.3f %8d", t.Name, w.Name, root.Name, math.abs(off.X), n))
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end
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end
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end
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end
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-- ---------------------------------------------------------------- built
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log("")
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log("=== BUILT cars: tyre alignment + surviving outside welds ===")
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log("tyreErrX = how far the widest shell wheel part sits from its physics")
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log("cylinder along the car's lateral axis. Should be ~0 on every corner.")
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log("")
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log(string.format("%-12s %-5s %9s %s", "car", "grp", "tyreErrX", "welds tying group to OUTSIDE"))
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for _, t in ipairs(ReplicatedStorage.CarModels:GetChildren()) do
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local car = Cars.Get(t.Name)
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if car then
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local m = CarManager._buildForDiag(car, Chassis.tuningFor(car))
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m.Parent = workspace
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m:PivotTo(CFrame.new(0, 5010, 0))
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for _ = 1, 4 do
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RunService.Heartbeat:Wait()
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end
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local body = m.PrimaryPart
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local shell = m:FindFirstChild("Shell")
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local wg = shell and shell:FindFirstChild("Wheels")
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if wg then
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local inv = body.CFrame:Inverse()
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for _, w in ipairs(wg:GetChildren()) do
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local phys = m:FindFirstChild("Wheel_" .. w.Name:upper())
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local group, inGroup = {}, {}
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if w:IsA("BasePart") then
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group[1], inGroup[w] = w, true
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end
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for _, d in ipairs(w:GetDescendants()) do
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if d:IsA("BasePart") then
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group[#group + 1] = d
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inGroup[d] = true
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end
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end
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if phys and #group > 0 then
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-- widest part = the tyre; compare its |X| to the cylinder's
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local physX = (inv * phys.Position).X
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local best, bestW = nil, -1
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for _, p in ipairs(group) do
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local vol = p.Size.X * p.Size.Y * p.Size.Z
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if vol > bestW then
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best, bestW = p, vol
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end
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end
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local errX = (inv * best.Position).X - physX
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-- any weld from this group to something outside it,
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-- searched across the WHOLE model, not just the shell
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local bad = {}
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for _, c in ipairs(m:GetDescendants()) do
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if c:IsA("WeldConstraint") or c:IsA("Weld") then
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local a, b = c.Part0, c.Part1
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local aIn = a ~= nil and inGroup[a] or false
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local bIn = b ~= nil and inGroup[b] or false
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if (aIn or bIn) and not (aIn and bIn) then
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local other = aIn and b or a
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local oname = other and other.Name or "nil"
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-- weld to its own physics cylinder is CORRECT
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if oname ~= ("Wheel_" .. w.Name:upper()) then
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bad[#bad + 1] = oname .. "(" .. c.Parent.Name .. ")"
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end
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end
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end
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end
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log(
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string.format(
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"%-12s %-5s %9.3f %s",
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t.Name,
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w.Name,
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errX,
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#bad > 0 and table.concat(bad, ", ") or "-none-"
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)
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)
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end
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end
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end
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m:Destroy()
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end
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end
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cm:Destroy()
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return table.concat(out, "\n")
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