The first cut drew every part at the origin, overlapping into a mess — the parts'
vertex buffers are authored around the origin, NOT pre-placed. The real world
placement lives in the composite scene-graph resource `e_rou_<id>`, exactly like
node_transforms poses the DeltaSaber's fins within one resource — but here the
nodes reference SEPARATE geometry resources.
Two tiers, matching how the game splits a ship (as the user described):
- Hull — `rou_<id>_*` scene nodes name the hull body resources and carry their
world transform (bodies that together form the hull, not individually
destructible). Composed parent∘child down the first-child/next-sibling tree.
- External hardpoints — `GN_*` frame nodes are the Vessel mounts (`GN_Bridge_01`,
`GN_ShieldG_01`, `GN_Engine_01`, matching the IDXD recipe Frame names). Each
bridge / shield-generator / engine part is placed at its frame by category+idx —
the individually-destructible parts.
- mesh: `scene_world_nodes` — walk a composite, emit every `rou_`/`GN_` node with
its composed world transform (same record layout + TRS convention as
node_transforms, cross-resource). ScenePart{resource,m,t}+apply.
- ship: `assemble_ship(bytes, id)` — resolve hull nodes to the ship's own parts
(shared cross-id turrets excluded — they need the per-mount recipe), match
external parts to GN frames, fall back to a raw draw when a prop has no
composite. is_base_part now also drops `_dNN`/`_lNN`/`_mNN` LOD copies.
- viewer: build_ship_model runs assemble_ship, decodes only referenced resources,
bakes each part's world pose into its vertices (one posed copy per placement),
then assembles via the shared prepare path. RequestShipRender carries the id.
Verified headless: parts now spread into coherent single-ship extents
(e108 185×174×683, f106 703×479×2079, f101 carrier 560×539×1712) instead of
piling at the origin. Turret placement (shared eNNN gun models on many GN_*Gun*
frames) still pending the per-mount recipe.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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