Two independent threads that landed on this branch.
## 1. Federation false-origin guess: arm-on-add + frame-on-origin
The cc54237f5 fix moved the guess off the refresh() fan-in (terminating
the stack-overflow recursion on Holter Tower), but the gating was still
`modelIds().size() == 1` — broken for batch-add-into-empty-session
because the session registry is populated synchronously by all
addModel calls before any modelGeometryReady lands. Result: load 3
files at once → none of the per-model geometry-ready events ever
finds `size() == 1` → guess never fires → camera + federation origin
stay at surveyor coords.
Rework:
* **Arm/consume at the command boundary.** modules/models/Commands
exposes `armFederatedFalseOriginGuess` / `consumeFederatedFalseOrigin
Guess` (function pair — arming is a one-shot, raw-bool would let a
peek-without-clear silently break the contract). `addModel` and the
cloud-callback in `addModelFromCloud` arm if `modelIds().isEmpty()`
at the moment they're about to register federation entries. The
first geometry-ready then consumes the arm and runs the guess —
batch add or single, works the same way.
* **Lazy first geometry point from mesh AABB centre.** Drop
SceneLoader's `firstPlacement(mid)` / `first_placement` /
`has_first_placement` and the two capture sites entirely. The
viewport keeps CPU-side MeshInfo + InstanceCpu for picking /
measurement; compute the anchor on demand via new const accessor
`WgpuViewportWindow::firstGeometryPointWorldM(mid, out)` =
instance0.placement × meshes[instance0.mesh_id].aabb_centre.
This is more representative than the placement translation
(placements often live far from the actual geometry due to long
ObjectPlacement chains / intermediate local frames), and lighter
storage-wise (lazy, vs. 128 B per model held just-in-case).
* **`guessFederatedFalseOrigin` math signature: Matrix4d → Vector3d.**
The function only ever consumed `.block<3,1>(0,3)`; the Matrix4d
API surface was a strictly-larger-than-necessary contract. Vector3d
matches what the function actually needs.
* **`WgpuViewportWindow::frameOnFederatedOrigin(mid, max_distance_m)`**
replaces the post-shift use of viewAll() that the ViewportView
almost reached for. The federated false origin sits at (0,0,0) in
post-shift space by construction, so the camera targets there
directly; distance fits the model's post-shift AABB diagonal with
viewAll's padding math, clamped to `max_distance_m` so a model
with one crazy-coord outlier vertex can't pull the camera back so
far the real geometry becomes a pixel. Called with 100 m cap from
the guess. Unlike viewAll() this only iterates the one model the
guess fired for — the "load 10 models, viewAll shows nothing"
failure mode is structurally avoided.
* **ViewportView::tryGuessFirstModelFalseOrigin** renamed to
`guessFederatedFalseOriginFromFirstModel` and the body restructured
to consume the arm, look up the anchor via the viewport, mutate
the federation origin (which propagates through SessionState's
federatedFalseOriginChanged relay → refresh() → recompose all
instance world AABBs), then `frameOnFederatedOrigin(mid, 100)`.
* **Internal guards preserved.** filePath skip (project files own
the origin), current==defaults skip (don't clobber a user who
set the origin manually then removed the model), placement /
georef availability checks — defense-in-depth around the arm, not
the primary gate. The arm-only flow means re-arming on add-into-
empty-session is naturally re-firable: add → remove → add will
retry if the previous guess returned defaults.
## 2. wgpu present-mode: prefer Immediate above FifoRelaxed
On Linux Vulkan stacks where the driver / compositor doesn't advertise
Mailbox (confirmed on the user's setup — capability log added in this
patch reports just `fifo, fifo_relaxed, immediate`), Fifo's 2–3 frame
queue doubles input-to-photon latency the moment WASD activates
(~16 ms render-body fully consumes the budget, so the queue is held
deep). On a 60 Hz display this reads as "less smooth than the 100 fps
HUD suggests" during fly-mode mouse-look-while-moving — confirmed by
WGPU_FLY_DEBUG dt traces (rock-solid 16-17 ms cadence, so it's not
frame pacing — it's latency).
Promote Immediate above FifoRelaxed in the preference order so that
when Mailbox is unavailable we pick the no-queue option (can tear
under fast motion, but tearing on architectural geometry is usually
invisible while the latency win is immediately felt). Also log the
full advertised capability list on first configure so future "why
isn't Mailbox available?" diagnostics don't need a code patch.
Mailbox remains first preference; Fifo remains the spec-guaranteed
final fallback.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Bonsai now drives the wgpu viewport for both sidecar and direct-IFC
loads. The GL viewer and its supporting state classes are gone.
SceneLoader rewire:
- Takes WgpuViewportWindow* instead of ViewportWindow*.
- Sidecar path reads metadata only (readSidecarMetadataOnly) and hands
the StreamingSidecar off to the new applyCachedModel. Field accesses
inside applySidecarData go through .meta.
- Direct-IFC path uses the wgpu A-path (upload{Mesh,Instance}Chunk +
finalizeModel). The applyLodExtension call is dropped — wgpu has no
live LOD1 splice; LOD1 still lands in the on-disk sidecar for the
next open.
Bonsai migration:
- ViewportWindow → WgpuViewportWindow across MainWindow, Measurement,
SessionState, and every modules/*/{Commands,Panel,View}.{h,cpp} —
116 sites total. Same s/OverlayRenderer::/WgpuOverlayRenderer::/
rename, 12 sites.
- Includes flipped from ../ifcviewer/ViewportWindow.h to
../ifcviewer-wgpu/WgpuViewportWindow.h. OverlayRenderer.h include
dropped (transitively reached via the viewport header).
- BonsaiViewer links IfcViewerWgpu in addition to IfcViewer for the
duration of the migration; the GL-side IfcViewer also publicly links
IfcViewerWgpu so SceneLoader can resolve WgpuViewportWindow.
GL backend deletion:
- src/ifcviewer/ViewportWindow.{cpp,h}, BvhAccel.*, OverlayRenderer.*,
Selection.*, Visibility.* all gone.
- src/ifcviewer-minimal/ removed entirely (MinimalWindow drove the GL
viewport).
- src/ifcviewer/tests: test_bvh_accel, test_selection, test_visibility
removed. The first has no replacement (wgpu doesn't use a per-instance
BVH); the latter two are ported separately. test_lod_builder,
test_sidecar_cache, test_instanced_geometry, test_federation remain
(backend-agnostic).
- IfcViewer's CMakeLists drops OpenGL, Qt::OpenGL, Qt::Widgets — none
of the surviving translation units reach for them.
Build flag plumbing:
- BUILD_BONSAIVIEWER now auto-enables BUILD_BONSAIVIEWER_WGPU since
SceneLoader requires the wgpu lib for its WgpuViewportWindow* arg.
- The wgpu subprojects add_subdirectory ahead of the GL one so
IfcViewerWgpu exists when IfcViewer's link evaluates.
- src/ifcviewer-minimal subdir reference removed from cmake/CMakeLists.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Directory src/ifcviewer-full -> src/bonsaiviewer, CMake target
IfcViewerFull -> BonsaiViewer, namespace ifcviewerfull -> bonsaiviewer,
QApplication / window titles / connector path now use the new brand.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Dion Moult