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release: Helix 1.2.7 — multi-plate extraction + prepare progress - #11
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Fix multi-plate 3MF preview failing ("Native engine could not load this model") by repacking the selected plate into a minimal core-spec 3MF the strict PrusaSlicer engine accepts.
Stream the extraction via XmlPullParser so no mesh is ever materialized as a Java String — avoids OOM on large files (tested: 88MB Monkey / 57MB Stitch). Inlines external part-file meshes (3D/Objects/object_N.model) and flattens component-group objects with composed transforms.
Add a Prepare & Slice progress modal (real byte-counted % across both streaming passes, phase labels, rotating sayings). Defer plate extraction from card-tap to Prepare&Slice so picking a plate is instant.
Bump version 1.2.6 -> 1.2.7, versionCode 16 -> 17.
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Highlights
XmlPullParser— no mesh is ever materialized as a JavaString. Verified on 88MB (Monkey) and 57MB (Stitch) files.3D/Objects/object_N.model) are now inlined, and component-group objects are flattened with composed transforms.Version
1.2.6→1.2.7(versionCode16→17).Merging to
maintriggers the APK build and updates the rollinglatestrelease (changelog anchored tov1.2.7).