The hex_cell.scad echoes its computed dimensions (pack_height_holder,
total_*_holder, box_total_*) to stderr. Capture those and surface them
in the viewer so the user can sanity-check whether the assembled
battery will fit in a target case.
Backend:
- holder.py: render_stl() now returns (stl_bytes, dims) where dims is
a {name: float} dict parsed from openscad ECHO lines.
- app.py: /api/holder/render emits the dims dict as an
X-Holder-Dimensions response header (JSON) with the matching
Access-Control-Expose-Headers entry so fetch() can read it under
any proxy / future CORS setup.
Viewer (holder-viewer.js):
- New setGhostBox(name, {w,d,h}, {visible,color}) and clearGhostBox(name)
helpers. Each ghost is a Group of a translucent BoxGeometry mesh +
matching EdgesGeometry wireframe, positioned to match how the STL
mesh is placed (centred XY, bottom on Z=0).
UI (holder.html / holder.css):
- New "Fit check" panel under Status with two sections:
• Show max bounding box (auto, from ECHO — defaults to box_total_*
dims, falls back to total_*_holder + pack_height_holder).
• Show enclosure (manual W × D × H inputs in mm).
- Verdict line under the enclosure inputs: "✓ fits" green or
"✗ too small — battery won't fit" red.
Controller (holder-app.js):
- Reads X-Holder-Dimensions after each render, updates the max-box
ghost in blue, prints the dimensions label.
- Watches enclosure inputs + toggles, drives the enclosure ghost
(green if it fits, red if smaller than the max box on any axis).
- Fit comparison is orientation-independent in the XY plane (sorted
W,D pair) but strict on Z (height).
wenil
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