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feat(editor): add --gen-texture-dots polka-dot pattern

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Solid background with circular dots arranged on a regular grid.
Useful for fabric/clothing textures, game-board patterns, mushroom
caps, and decorative tiling.

Args: <out.png> <bgHex> <dotHex> [radius] [spacing] [W H]
Defaults: radius 8, spacing 32, 256x256.

Adds the 8th procedural texture pattern (joining solid, checker,
grid, vertical/horizontal/radial gradients, noise, stripes).
Verified: 128x128 white-bg / red-dot at radius 12 + spacing 48
writes successfully.
This commit is contained in:
Kelsi 2026-05-07 16:03:51 -07:00
parent 6a7ea6dcfc
commit 2a0cae36d4
1 changed files with 107 additions and 1 deletions
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108
tools/editor/main.cpp
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@ -535,6 +535,8 @@ static void printUsage(const char* argv0) {
std::printf(" Synthesize a radial gradient PNG (center→edge, smooth distance-based blend)\n");
std::printf(" --gen-texture-stripes <out.png> <colorAHex> <colorBHex> [stripePx] [diagonal|horizontal|vertical] [W H]\n");
std::printf(" Synthesize a two-color stripe pattern (default 16px diagonal, 256x256)\n");
std::printf(" --gen-texture-dots <out.png> <bgHex> <dotHex> [dotRadius] [spacing] [W H]\n");
std::printf(" Synthesize a polka-dot pattern (default radius 8, spacing 32, 256x256)\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");
@ -1019,7 +1021,7 @@ int main(int argc, char* argv[]) {
"--center-mesh", "--flip-mesh-normals", "--mirror-mesh",
"--smooth-mesh-normals",
"--merge-meshes",
"--gen-texture-radial", "--gen-texture-stripes",
"--gen-texture-radial", "--gen-texture-stripes", "--gen-texture-dots",
"--validate-glb", "--info-glb", "--info-glb-tree", "--info-glb-bytes",
"--validate-jsondbc", "--check-glb-bounds", "--validate-stl",
"--validate-png", "--validate-blp",
@ -17206,6 +17208,110 @@ int main(int argc, char* argv[]) {
std::printf(" stripe : %d px\n", stripePx);
std::printf(" colors : %s + %s\n", aHex.c_str(), bHex.c_str());
return 0;
} else if (std::strcmp(argv[i], "--gen-texture-dots") == 0 && i + 3 < argc) {
// Polka-dot pattern: solid background with circular dots
// on a regular grid. Useful for fabric/clothing textures,
// game-board patterns, or quick decorative tiling.
std::string outPath = argv[++i];
std::string bgHex = argv[++i];
std::string dotHex = argv[++i];
int radius = 8, spacing = 32;
int W = 256, H = 256;
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { radius = std::stoi(argv[++i]); } catch (...) {}
}
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { spacing = std::stoi(argv[++i]); } catch (...) {}
}
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { W = std::stoi(argv[++i]); } catch (...) {}
}
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { H = std::stoi(argv[++i]); } catch (...) {}
}
if (W < 1 || H < 1 || W > 8192 || H > 8192 ||
radius < 1 || radius > 1024 ||
spacing < 2 || spacing > 4096) {
std::fprintf(stderr,
"gen-texture-dots: invalid dims (W/H 1..8192, radius 1..1024, spacing 2..4096)\n");
return 1;
}
auto parseHex = [](std::string hex,
uint8_t& r, uint8_t& g, uint8_t& b) -> bool {
std::transform(hex.begin(), hex.end(), hex.begin(),
[](unsigned char c) { return std::tolower(c); });
if (!hex.empty() && hex[0] == '#') hex.erase(0, 1);
auto fromHexC = [](char c) -> int {
if (c >= '0' && c <= '9') return c - '0';
if (c >= 'a' && c <= 'f') return 10 + c - 'a';
return -1;
};
int v[6];
if (hex.size() == 6) {
for (int k = 0; k < 6; ++k) {
v[k] = fromHexC(hex[k]);
if (v[k] < 0) return false;
}
r = static_cast<uint8_t>((v[0] << 4) | v[1]);
g = static_cast<uint8_t>((v[2] << 4) | v[3]);
b = static_cast<uint8_t>((v[4] << 4) | v[5]);
return true;
}
if (hex.size() == 3) {
for (int k = 0; k < 3; ++k) {
v[k] = fromHexC(hex[k]);
if (v[k] < 0) return false;
}
r = static_cast<uint8_t>((v[0] << 4) | v[0]);
g = static_cast<uint8_t>((v[1] << 4) | v[1]);
b = static_cast<uint8_t>((v[2] << 4) | v[2]);
return true;
}
return false;
};
uint8_t br, bg, bb, dr, dg, db;
if (!parseHex(bgHex, br, bg, bb)) {
std::fprintf(stderr,
"gen-texture-dots: '%s' is not a valid hex color\n",
bgHex.c_str());
return 1;
}
if (!parseHex(dotHex, dr, dg, db)) {
std::fprintf(stderr,
"gen-texture-dots: '%s' is not a valid hex color\n",
dotHex.c_str());
return 1;
}
std::vector<uint8_t> pixels(static_cast<size_t>(W) * H * 3, 0);
float r2 = static_cast<float>(radius) * radius;
for (int y = 0; y < H; ++y) {
for (int x = 0; x < W; ++x) {
// Distance to the nearest grid point.
int gx = (x + spacing / 2) / spacing * spacing;
int gy = (y + spacing / 2) / spacing * spacing;
float dx = static_cast<float>(x - gx);
float dy = static_cast<float>(y - gy);
bool inDot = (dx * dx + dy * dy) < r2;
size_t i2 = (static_cast<size_t>(y) * W + x) * 3;
pixels[i2 + 0] = inDot ? dr : br;
pixels[i2 + 1] = inDot ? dg : bg;
pixels[i2 + 2] = inDot ? db : bb;
}
}
if (!stbi_write_png(outPath.c_str(), W, H, 3,
pixels.data(), W * 3)) {
std::fprintf(stderr,
"gen-texture-dots: 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 : %s\n", bgHex.c_str());
std::printf(" dot : %s\n", dotHex.c_str());
std::printf(" radius : %d px\n", radius);
std::printf(" spacing : %d px\n", spacing);
return 0;
} else if (std::strcmp(argv[i], "--gen-mesh") == 0 && i + 2 < argc) {
// Synthesize a procedural primitive WOM. Generates proper
// per-face normals, planar UVs, a bounding box, and a