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_shellgeom.luau -- measure the SHELL BODYWORK directly.
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Two prior attempts both returned dZ = -11.80 for every car, which is the
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chassis wheelbase: the "shell wheels" being matched are in fact the
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chassis Wheel_* parts, so those runs proved nothing about shell facing.
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Stop relying on wheel names. Instead:
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1. Dump the real child structure of one shell so we can see what is
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actually in there after the build.
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2. Measure asymmetric BODYWORK mass: a car's cabin/rear sits behind its
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nose, so the shell's own parts are not symmetric front-to-back.
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Compare the shell part centroid against the shell AABB centre along
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body-local Z -- the sign flips when the shell is rotated 180.
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3. Cross-check against the same measurement on the raw TEMPLATE, where
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diag_shellyaw2 already established ground truth (hatch_junk and
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hyper_x authored nose-toward +Z, the other three nose-toward -Z).
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If the built car's sign matches the template's, the flip never happened.
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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 cloneMod = orig:Clone()
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cloneMod.Parent = orig.Parent
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local CarManager = require(cloneMod)
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-- 1. What is actually inside a built shell?
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local car0 = Cars.Get("hyper_x")
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local m0 = CarManager._buildForDiag(car0, Chassis.tuningFor(car0))
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m0.Parent = workspace
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m0:PivotTo(CFrame.new(0, 5010, 0))
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local shell0 = m0:FindFirstChild("Shell")
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log("=== STRUCTURE of built hyper_x Shell ===")
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if shell0 then
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for _, c in ipairs(shell0:GetChildren()) do
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local extra = ""
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if c:IsA("Folder") or c:IsA("Model") then
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local kids = {}
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for _, k in ipairs(c:GetChildren()) do
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kids[#kids + 1] = k.Name
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end
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extra = " {" .. table.concat(kids, ",") .. "}"
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end
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log(string.format(" %-16s %s%s", c.Name, c.ClassName, extra))
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end
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else
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log(" <no Shell>")
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end
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m0:Destroy()
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log("")
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-- 2/3. Bodywork asymmetry, template vs built.
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local function asymmetry(root: Instance, frame: CFrame): number?
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-- Volume-weighted centroid of bodywork, minus AABB centre, along local Z.
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local inv = frame:Inverse()
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local sum, wsum = 0, 0
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local lo, hi = math.huge, -math.huge
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for _, p in ipairs(root:GetDescendants()) do
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if p:IsA("BasePart") then
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local n = p.Name:lower()
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-- exclude wheels/tyres of any naming convention
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if not (n:find("wheel") or n:find("tyre") or n:find("tire") or n:find("rim")) then
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local z = (inv * p.Position).Z
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local vol = p.Size.X * p.Size.Y * p.Size.Z
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sum += z * vol
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wsum += vol
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lo = math.min(lo, z)
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hi = math.max(hi, z)
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end
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end
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end
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if wsum <= 0 then
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return nil
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end
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local centroid = sum / wsum
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local aabbCentre = (lo + hi) / 2
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return centroid - aabbCentre
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end
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log("=== BODYWORK ASYMMETRY along local Z (centroid - aabb centre) ===")
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log("A car has more mass toward the REAR (cabin/boot), so on a correctly")
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log("faced shell this should be POSITIVE (mass behind centre, nose at -Z).")
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log("")
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log(string.format("%-14s %14s %14s %s", "car", "template", "built", "verdict"))
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for _, template in ipairs(ReplicatedStorage.CarModels:GetChildren()) do
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local id = template.Name
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local tA = asymmetry(template, template:GetPivot())
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local car = Cars.Get(id)
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local bA = nil
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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, 3 do
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RunService.Heartbeat:Wait()
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end
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local sh = m:FindFirstChild("Shell")
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if sh then
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bA = asymmetry(sh, m.PrimaryPart.CFrame)
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end
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m:Destroy()
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end
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local verdict = "?"
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if tA and bA then
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local flipped = (tA > 0) ~= (bA > 0)
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verdict = flipped and "rotated by build" or "NOT rotated"
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end
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log(
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string.format(
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"%-14s %14s %14s %s",
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id,
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tA and string.format("%+.3f", tA) or "n/a",
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bA and string.format("%+.3f", bA) or "n/a",
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verdict
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)
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)
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end
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cloneMod:Destroy()
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return table.concat(out, "\n")
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