Kelsi 7f7104623d feat(editor): add --gen-texture-woodgrain end-cut tree-rings ...

56th procedural texture: concentric annual growth rings
centered slightly off-image (at -W*0.2, H/2) so the texture
shows sweeping arcs across most of its area rather than the
bullseye --gen-texture-rings produces.

Per-ring jitter shifts the dark-band center within each
ring's annular cell, so adjacent rings don't read as a
perfect modulus pattern — mimics real annual-growth
variation. Brightness lerps from lightHex (early-wood)
to darkHex (late-wood / heartwood) with a smooth
triangular falloff at the dark-band peak.

First procedural texture to use the new cli_arg_parse
helpers for the optional spacing/seed/W/H args.

Useful for tabletops, log-end caps (chopped firewood
stumps), barrel lids, beam cross-sections, plank ends —
distinct from --gen-texture-wood which renders vertical
grain streaks for plank surfaces.

2026-05-09 11:44:33 -07:00

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