Zigzag engine: cubical/string-diagram constructions in Rust. Reference for topolei.
c51e3274f9
Zigzag engine (6802 lines, 184 tests): - Construction 17 normalisation: working through dimension 3+ - Import from homotopy-rs JSON: working (scalar, two_scalars, half_braid) - Piece extraction via Embedding/restrict_diagram: working - Type checking pipeline: working (Eckmann-Hilton half_braid passes) - Essential identity detection: validated with full 2-diagram test Bugs found and fixed: - assemble_factorisations losing cospan legs during reassembly - RewriteN::slice() using source offsets instead of target indices - singular_preimage() not handling passthrough heights - restrict_rewrite() not accounting for accumulated cone offsets - Embedding::preimage() using regular_preimage for Singular case Added vis-engine-spec.md: visualization engine specification - 6-layer architecture from math primitives to scene graph - SVG renderer for 2D, WebGL2 for 3D, custom hit testing - Spring constraint integration point for semiotic rendering - No external dependencies - game engine approach Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> |
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