mirror of
https://github.com/maziggy/bambuddy.git
synced 2026-09-29 18:51:43 +02:00
maziggy
0eb083b32e
The post-slice thumbnail loaded the sliced 3MF with trimesh, whose reader mishandles the Bambu Studio / OrcaSlicer layout: for every component that references a file in 3D/Objects/ it re-parses that file and appends all of its meshes again. N copies of a part came back as N^2 copies of its triangles, and each component carried every other part of the same file. 25 bins of 10k faces loaded as 6.4M faces; the render took 54 s and 8.4 GB on the event loop, and the server was OOM-killed. Parse the 3MF directly (lxml, entities/DTD/network off, streamed and freed element by element), walk objects, components and build items (p:path on either) with their transforms, and keep each mesh once. Decimate per unique mesh to its share of a face budget before placing instances, flip winding on mirrored placements, and skip the thumbnail above a face ceiling checked both on what decimation can reach and on what it delivered. Both slice routes run the render in a thread. The renderer uses matplotlib's Figure/Agg API instead of pyplot, whose process-global figure state let a threaded plate render and stl_thumbnail's event-loop render lay out and close each other's figures.