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feat(editor): add --gen-texture-pinstripe formal-fabric pattern

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58th procedural texture: thin vertical lines at every
`stride` x position, with optional thicker "feature" line
every Nth stripe. The periodic doubled-thickness emphasis
is what distinguishes this from --gen-texture-stripes
(which renders wide alternating bands of each color).

Each stripe is centered within its column and has
configurable lineW; feature stripes are 2× the regular
width. Set featureEvery=0 to disable feature emphasis for
a uniform pinstripe pattern.

Useful for noble-house tabards, formal-attire fabric,
banker's counter cloth, sci-fi panel detailing, royal-
guard uniform trim, library / archive carpet runners.

Default 12-pixel stride, 1-pixel line, feature every 6th
stripe gives the classic suit-pinstripe look at 256x256.
This commit is contained in:
Kelsi 2026-05-09 11:56:01 -07:00
parent 783b0f167f
commit d7941bd4ce
3 changed files with 78 additions and 1 deletions
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75
tools/editor/cli_gen_texture.cpp
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@ -4235,6 +4235,80 @@ int handleKnit(int& i, int argc, char** argv) {
return 0;
}
int handlePinstripe(int& i, int argc, char** argv) {
// Pinstripe: thin vertical lines at every `stride` x position,
// with optional thicker "feature" line every Nth stripe so the
// pattern reads as a real pinstripe (the periodic emphasis is
// what distinguishes it from --gen-texture-stripes which uses
// wide alternating bands). Useful for noble-house tabards,
// formal-attire fabric, sci-fi panel detailing, banker's
// counter cloth.
std::string outPath = argv[++i];
std::string bgHex = argv[++i];
std::string lineHex = argv[++i];
int stride = 12;
int lineW = 1;
int featureEvery = 6; // every Nth stripe is a thicker feature line
int W = 256, H = 256;
parseOptInt(i, argc, argv, stride);
parseOptInt(i, argc, argv, lineW);
parseOptInt(i, argc, argv, featureEvery);
parseOptInt(i, argc, argv, W);
parseOptInt(i, argc, argv, H);
if (W < 1 || H < 1 || W > 8192 || H > 8192 ||
stride < 2 || stride > 1024 ||
lineW < 1 || lineW * 2 >= stride ||
featureEvery < 0 || featureEvery > 64) {
std::fprintf(stderr,
"gen-texture-pinstripe: invalid dims (W/H 1..8192, "
"stride 2..1024, lineW 1..stride/2, featureEvery 0..64)\n");
return 1;
}
uint8_t br_, bg_, bb_, lr, lg, lb;
if (!parseHex(bgHex, br_, bg_, bb_) ||
!parseHex(lineHex, lr, lg, lb)) {
std::fprintf(stderr,
"gen-texture-pinstripe: bg or line hex color is invalid\n");
return 1;
}
std::vector<uint8_t> pixels(static_cast<size_t>(W) * H * 3, 0);
const int featureW = lineW * 2; // feature line is 2× normal width
for (int y = 0; y < H; ++y) {
for (int x = 0; x < W; ++x) {
int colIdx = x / stride;
int xLocal = x - colIdx * stride;
// Center the line within its column.
int center = stride / 2;
int dist = std::abs(xLocal - center);
int targetW = (featureEvery > 0 && (colIdx % featureEvery) == 0)
? featureW : lineW;
uint8_t r, g, b;
if (dist < (targetW + 1) / 2) {
r = lr; g = lg; b = lb;
} else {
r = br_; g = bg_; b = bb_;
}
size_t idx = (static_cast<size_t>(y) * W + x) * 3;
pixels[idx + 0] = r;
pixels[idx + 1] = g;
pixels[idx + 2] = b;
}
}
if (!stbi_write_png(outPath.c_str(), W, H, 3,
pixels.data(), W * 3)) {
std::fprintf(stderr,
"gen-texture-pinstripe: stbi_write_png failed for %s\n",
outPath.c_str());
return 1;
}
std::printf("Wrote %s\n", outPath.c_str());
std::printf(" size : %dx%d\n", W, H);
std::printf(" bg/line : %s / %s\n", bgHex.c_str(), lineHex.c_str());
std::printf(" stripes : stride=%d, lineW=%d, featureEvery=%d\n",
stride, lineW, featureEvery);
return 0;
}
int handleCarbon(int& i, int argc, char** argv) {
// Carbon-fiber weave: 2x2 cells where alternating cells hold
// horizontal vs vertical fiber segments. Each segment has a
@ -5128,6 +5202,7 @@ constexpr TextureEntry kTextureTable[] = {
{"--gen-texture-moss", 3, handleMoss},
{"--gen-texture-woodgrain", 3, handleWoodgrain},
{"--gen-texture-carbon", 3, handleCarbon},
{"--gen-texture-pinstripe", 3, handlePinstripe},
};
} // namespace