3d-tools/public/docs/ARCHITECTURE.md

Architecture

The core/model.ts module converts every supported source into one inert model containing finite position/normal arrays, triangle indices and descriptive scene metadata. Parser-specific bounds are enforced before allocation and again on normalized geometry. Normal repair, transforms, statistics and exporters consume only that model.

The preview expands at most 200,000 triangles into a dedicated WebGL buffer. It uses fixed application-owned shaders and never compiles source-file content. Full statistics and exports still use the complete bounded model. glTF data URIs are decoded locally; non-data URIs are rejected.

All Vite assets use relative paths for nested portal mounting. Release packaging fixes ZIP ordering, timestamps and permissions.