fix(reader): a wall whose record holds its previous location line is read by VWallDriver.m_pCrv, so 14 doors of rac_advanced 2027 take the axes rule (#1475) (RE-360)

changelog.d/fixed/1475-wall-previous-location-line.md

@@ -0,0 +1,32 @@
+- **A wall whose record holds its previous location line beside its
+  location curve is read by the curve `VWallDriver.m_pCrv` names (RE-360,
+  #1475).** Revit 2027's save of `rac_advanced` stores a second `GLine`,
+  owned by `WallRunTimeData.m_prevLocLine`, in 18 of its 180 `SWall`
+  records, and `native_walls` left out any wall with a second curve, so the 8
+  host walls of 14 doors returned no native line and the doors kept the
+  default axes. A record with exactly two curves is now read where one is the
+  level `GLine` `m_pCrv` names and the other is a `GLine` only
+  `m_prevLocLine` names; every wall read before is read as before, and a
+  `CurveLoop.m_curves` profile wall stays unread. Measured on Autodesk's
+  sample projects of 2024 to 2027 (no Revit export), Measure run
+  42134051521 at `0a0ba7ce` against the same code without it: 26 walls are
+  newly read over every `SWall` record (`rac_advanced` 2027 18, `rac_basic`
+  6, and 5 of those on the earlier saves, Snowdon Towers Architectural 2), of
+  which 20 can reach an export (the 18, and `rac_basic` 709245 and 234869;
+  none on Snowdon). `rac_advanced` and `rac_basic` then read the same walls
+  on all four saves, the 14 doors are placed by the RE-347 axes rule and
+  equal the 2025 save's in axes, origin, vertices and volume, and two
+  curtain walls (`rac_basic` 709245 on every save, `rac_advanced` 149877 on
+  2027) gain `Qto_CurtainWallQuantities.Length`, a value no Revit export or
+  gate checks on these files. No other wall, placement, body or property of
+  the five exports that move (`rac_basic` 2024 to 2027, `rac_advanced` 2027)
+  changes. The unfiltered run (Measure 42141380072 at `5754c7f3`, 111 models
+  and samples) moves six exports: those five and the BIM4LCA office as built,
+  where one door gains the rule's axes and they are Revit's (doors placed by
+  the rule 193 to 194, none differing from Revit's; its two newly read plain
+  walls' lengths are Revit's, and no body, class or quantity of it changes).
+  The other 105, Core Interior and the office at permit among them (281 and
+  76 walls newly read), are byte for byte main's. No held-out model holds a
+  previous location line. The 14 openings the doors cut have their doors'
+  axes; their size is still a record box on 2027, as the cut loop of a door's
+  symbol is read on 2024 and 2025 only.

docs/maintaining.md

@@ -325,11 +325,12 @@ these releases, to the 2024 save's: class, GlobalId, placement axes and body.
 It prints how many it compared and how many are off the default axes, fails
 below `OPENINGS_LEAST` per class and above `OPENINGS_LEFT_OUT_MOST`, the doors
 and windows the 2024 save places by the rule that a later save leaves on the
-default axes (28 on the 2026 and 42 on the 2027 save of `rac_advanced` when it
-was set: the pass that takes a door's host from its native record (RE-245) is
-run on `CUT_LOOP_REVIT_VERSIONS`, 2024 and 2025, so on 2026 and 2027 a nearest
-wall that is not the door's own fails the along-the-wall test; and on 2027, 14
-more, set in 8 host walls with no native straight-line row, #1475), which
+default axes (28 on the 2026 and 2027 saves of `rac_advanced`: the pass that
+takes a door's host from its native record (RE-245) is run on
+`CUT_LOOP_REVIT_VERSIONS`, 2024 and 2025, so on 2026 and 2027 a nearest wall
+that is not the door's own fails the along-the-wall test; the 2027 save had 14
+more until RE-360, set in 8 host walls whose record holds a previous location
+line beside the location curve, which `native_walls` now reads, #1475), which
 can only shrink: a count that drops
 moves the ceiling down in the change that drops it. It exercises two buildings
 (`rac_advanced` and `rac_basic`, each saved by each release); `rst_basic` holds