Phase 2: walk + spiral presets - #2
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Port the walk math and Archimedean spiral from the Wittgenstein piece; rebuild the renderers in matplotlib. - layout/walk.py: walk_layout (2-D turtle — step forward, turn 90°) and heading_angles, ported from compute_path. Returns N+1 vertices so a per-unit colour aligns with the N segments render_path draws. - layout/spiral.py: spiral_layout (equal-arc-length Archimedean placement) and tangent_angles for orienting glyphs. - layout/widths.py: rendered_widths — headless rendered-width measurement via matplotlib TextPath (the width-step), robust to degenerate glyphs. - presets/text_walk.py: sentences as a space-filling walk; "path" (coloured ribbon) and "glyphs" (calligraphy-on-path) modes; dependency-free length/position channels by default; auto/categorical/continuous colour. - presets/punctuation_spiral.py: a text's marks on a spiral, accenting logical/mathematical/Greek signs in gold on a dark plate. - render/mpl.py: frame_axes promoted to a public shared helper. - Public API re-exports; examples and docs for both presets; CHANGELOG. make ci green (102 tests, incl. Hypothesis geometry properties); mkdocs build --strict green; both example figures render headlessly. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Phase 2 — walk + spiral
Ports the walk math and the Archimedean spiral from the evolved Wittgenstein project, rebuilding the renderers in matplotlib. Stacked on #1 (
phase-1-spine) — review/merge that first, or re-target this tomainonce it lands.Layouts
layout/walk.py—walk_layout(2-D turtle: step forward by a per-unit length, turn 90°) +heading_angles, ported from the piece'scompute_path. ReturnsN+1vertices so a per-unit colour aligns with theNsegments.layout/spiral.py—spiral_layout, equal-arc-length placement alongr = r0 + b·θ, +tangent_angles.layout/widths.py—rendered_widths: the width-step, measured headlessly with matplotlibTextPath(no display/canvas/Blender), robust to degenerate glyphs.Presets
text_walk— sentences as a space-filling walk;"path"(multi-coloured ribbon) and"glyphs"(calligraphy-on-path) modes. Built-in length/position channels mean it works with no analysis stack;colouraccepts any per-sentence array (auto/categorical/continuous).punctuation_spiral— a text's marks on a spiral, accenting logical/mathematical/Greek signs in gold on a dark plate.Verification
make cigreen: 102 tests incl. Hypothesis geometry properties (segment lengths == steps, determinism, bounded box, 90° turn sequence, monotone spiral radius, near-uniform arc spacing).mkdocs build --strictgreen; bothexamples/figures render headlessly and were eyeballed.🤖 Generated with Claude Code