Files
jesse 1d23c187ad Daikoku PA: two perimeter ramps, far side served by the median opening
Rework the PA junction to match the reference drawing: yellow = PA -> highway
(entry), red = highway -> PA (exit). Entry and exit swap sides (entry now
EAST, exit WEST) and both trunks hug the PA perimeter instead of running
concentric spirals.

The simplification: both carriageways sit at the same deck level, adjacent,
so the median opening IS the far-side access path. The under-deck crossing
and merge runs are deleted outright -- 8 runs collapse to 4, and the
girder-soffit ceiling logic that constrained the crossing goes with them.
Part count 24,210 -> 21,691.

The median opening is now load-bearing rather than cosmetic (it is the only
route from the far carriageway to the ramps), so it widens from 6 to 9
samples per junction.

Orientation is a single flip-able constant (ORIENT) so a mirrored result is
a one-line correction, not a rewrite.

Measured on the built map (not asserted):
  - 600 entry + 600 exit ramp parts
  - max grade 8.00% / 8.27%, under the 9% limit
  - 0 collisions with piers/masts/girders (558 structural parts)
  - segment continuity <= 2.5 studs; trunk->merge handoff <= 1.7 studs
  - merge lands at dY 0.0 (exact deck level), 33 studs lateral
  - median open at junctions: 0 parts vs. control ~7 on plain mainline

Two traps worth recording, both caught by controls:

1. Studio's require() cache silently rebuilt STALE code. The first "passing"
   build reported 17,575 parts and zero ramps, and the map contained
   PAOffRamp/PAOnRamp parts whose names exist nowhere in the current source.
   Every measurement taken before this was describing an old map. Added
   tools/rebuild_fresh.luau, which clones the module to bust the cache; use
   it rather than requiring MapBuilder directly.

2. A reported "median never opens" bug was a bad probe, not a defect. It
   counted `Barrier` (the outer edge parapet, which must NEVER open) instead
   of `Median_<i>`. Re-run against the right name: control 7, junctions 0.

Both were only visible because the probes carry controls -- a 0-hit result
with no control is vacuous. The verification harnesses are kept in tools/
with their controls built in.
2026-08-03 11:53:40 -04:00

72 lines
2.1 KiB
Luau

-- Correct probe: mainline deck parts are named "Road". Barriers are found by
-- actual name, not a guess. Also verifies the ramp tip lands ON a Road part
-- (not merely near one) and that the median parapet really is open at the
-- junctions.
local ws = game:GetService("Workspace")
local map = ws:FindFirstChild("Map")
local exp = map:FindFirstChild("Expressway")
local road, runs = {}, {}
local barrierNames = {}
for _, d in ipairs(map:GetDescendants()) do
if d:IsA("BasePart") then
local nm = d.Name
if nm:gsub("_?%d+$", "") == "Road" then
table.insert(road, d)
end
for _, base in ipairs({ "PAEntryRampNear", "PAExitRampNear", "PAEntryRampTrunk", "PAExitRampTrunk" }) do
if nm:sub(1, #base + 1) == base .. "_" then
runs[base] = runs[base] or {}
table.insert(runs[base], d)
end
end
if
nm:lower():find("barrier")
or nm:lower():find("parapet")
or nm:lower():find("wall")
or nm:lower():find("rail")
then
local b = nm:gsub("_?%d+$", "")
barrierNames[b] = (barrierNames[b] or 0) + 1
end
end
end
local out = {}
table.insert(out, "roadDeckParts=" .. #road)
local bn = {}
for k, v in pairs(barrierNames) do
table.insert(bn, k .. "=" .. v)
end
table.sort(bn)
table.insert(out, "barrier-ish: " .. table.concat(bn, " "))
local function sortKey(p)
return tonumber(p.Name:match("_(%d+)$")) or 0
end
-- Ramp tip -> nearest Road part, horizontal and vertical separately.
for _, base in ipairs({ "PAEntryRampNear", "PAExitRampNear" }) do
local parts = runs[base]
if not parts then
table.insert(out, base .. ": MISSING")
continue
end
table.sort(parts, function(a, b)
return sortKey(a) < sortKey(b)
end)
for _, which in ipairs({ { "head", parts[1] }, { "tail", parts[#parts] } }) do
local p = which[2]
local bestH, bestDY = math.huge, 0
for _, m in ipairs(road) do
local h = (Vector3.new(p.Position.X, 0, p.Position.Z) - Vector3.new(m.Position.X, 0, m.Position.Z)).Magnitude
if h < bestH then
bestH = h
bestDY = p.Position.Y - m.Position.Y
end
end
table.insert(out, ("%s %s: horizToRoad=%.1f dY=%.1f"):format(base, which[1], bestH, bestDY))
end
end
return table.concat(out, "\n")