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feat(editor): add --gen-texture-carbon fiber-weave pattern

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57th procedural texture: 2x2 cell pattern where alternating
cells hold horizontal vs vertical fiber segments. Each
segment gets a sin² brightness profile across its
perpendicular axis — 0 at the segment edge, peak at center —
giving the rounded highlight of a real woven fiber bundle.

Cell-pair parity (cx + cy) % 2 determines orientation, so
adjacent cells always alternate weave direction in both X
and Y. Reads as the unmistakable carbon-fiber checkerboard
even at small scales.

Useful for sci-fi armor, sleek tech panels, vehicle bodies,
ritual obsidian inlays, dwarven runeplate accents — any
"machined composite" surface where flat dark grey would
read as plain plastic.

Default 12-pixel cell at 256x256 reads cleanly with about
21 visible weave segments per side.
This commit is contained in:
Kelsi 2026-05-09 11:49:20 -07:00
parent 9347290335
commit 68af5c10c9
3 changed files with 73 additions and 0 deletions
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2
tools/editor/cli_help.cpp
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@ -147,6 +147,8 @@ void printUsage(const char* argv0) {
std::printf(" Moss: irregular spots scattered on a hash-jittered grid (forest floor / weathered stone / swamp)\n");
std::printf(" --gen-texture-woodgrain <out.png> <lightHex> <darkHex> [spacing] [seed] [W H]\n");
std::printf(" Woodgrain: concentric annual rings centered off-image with per-ring jitter (end-cut wood)\n");
std::printf(" --gen-texture-carbon <out.png> <bgHex> <fiberHex> [cellSize] [W H]\n");
std::printf(" Carbon-fiber: 2x2 alternating-orientation weave with sin² fiber highlights (sci-fi/tech panels)\n");
std::printf(" --add-texture-to-zone <zoneDir> <png-path> [renameTo]\n");
std::printf(" Copy an existing PNG into <zoneDir> (optionally renaming it on the way in)\n");
std::printf(" --gen-mesh <wom-base> <cube|plane|sphere|cylinder|torus|cone|ramp> [size]\n");