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feat(editor): add --gen-texture-gradient for two-color linear PNGs
Synthesizes a linear two-color gradient PNG. Direction is "vertical" (top→bottom, default) or "horizontal" (left→right). Colors use the same RRGGBB / RGB hex syntax as --gen-texture, with optional leading '#'. Useful for the common "fade" cases that solid/checker/grid don't cover: sky strips, UI backgrounds, glow rings, dirt-on-grass terrain blends. Verified: sky.png (87CEEB→FFFFFF vertical 256×256) and a 64×32 horizontal red→blue both write valid PNGs with correctly-parsed endpoint RGB values reported back; invalid 'notacolor' hex fails exit 1. Brings command count to 212.
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Kelsi
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1 changed files with 120 additions and 1 deletions
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@ -526,6 +526,8 @@ static void printUsage(const char* argv0) {
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std::printf(" Markdown migration-progress report (per-pair table, share %%, recommended next steps)\n");
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std::printf(" --gen-texture <out.png> <colorHex|pattern> [W H]\n");
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std::printf(" Synthesize a placeholder texture (solid hex color or 'checker'/'grid'); default 256x256\n");
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std::printf(" --gen-texture-gradient <out.png> <fromHex> <toHex> [vertical|horizontal] [W H]\n");
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std::printf(" Synthesize a linear gradient PNG (default vertical, 256x256)\n");
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std::printf(" --add-texture-to-zone <zoneDir> <png-path> [renameTo]\n");
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std::printf(" Copy an existing PNG into <zoneDir> (optionally renaming it on the way in)\n");
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std::printf(" --gen-mesh <wom-base> <cube|plane|sphere|cylinder|torus|cone> [size]\n");
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@ -946,7 +948,7 @@ int main(int argc, char* argv[]) {
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"--bench-migrate-data-tree", "--list-data-tree-largest",
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"--export-data-tree-md", "--gen-texture", "--gen-mesh", "--gen-mesh-textured",
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"--add-texture-to-mesh", "--add-texture-to-zone",
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"--gen-mesh-stairs",
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"--gen-mesh-stairs", "--gen-texture-gradient",
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"--validate-glb", "--info-glb", "--info-glb-tree", "--info-glb-bytes",
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"--validate-jsondbc", "--check-glb-bounds", "--validate-stl",
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"--validate-png", "--validate-blp",
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@ -15139,6 +15141,123 @@ int main(int argc, char* argv[]) {
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std::printf(" size : %dx%d\n", W, H);
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std::printf(" spec : %s\n", spec.c_str());
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return 0;
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} else if (std::strcmp(argv[i], "--gen-texture-gradient") == 0 && i + 3 < argc) {
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// Linear two-color gradient. Useful for sky strips, UI
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// fills, glow rings, dirt-on-grass terrain blends — the
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// common "fade" cases that --gen-texture's solid/checker/
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// grid don't cover.
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//
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// Direction: "vertical" (top→bottom, default) or
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// "horizontal" (left→right). Colors are hex like
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// --gen-texture.
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std::string outPath = argv[++i];
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std::string fromHex = argv[++i];
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std::string toHex = argv[++i];
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bool horizontal = false;
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int W = 256, H = 256;
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if (i + 1 < argc && argv[i + 1][0] != '-') {
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std::string dir = argv[i + 1];
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std::transform(dir.begin(), dir.end(), dir.begin(),
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[](unsigned char c) { return std::tolower(c); });
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if (dir == "horizontal" || dir == "vertical") {
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horizontal = (dir == "horizontal");
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i++;
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}
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}
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if (i + 1 < argc && argv[i + 1][0] != '-') {
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try { W = std::stoi(argv[++i]); } catch (...) {}
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}
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if (i + 1 < argc && argv[i + 1][0] != '-') {
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try { H = std::stoi(argv[++i]); } catch (...) {}
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}
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if (W < 1 || H < 1 || W > 8192 || H > 8192) {
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std::fprintf(stderr,
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"gen-texture-gradient: invalid size %dx%d (1..8192)\n",
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W, H);
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return 1;
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}
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// Hex parser: shared local helper for both endpoints. Same
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// RRGGBB / RGB rules as --gen-texture.
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auto parseHex = [](std::string hex,
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uint8_t& r, uint8_t& g, uint8_t& b) -> bool {
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std::transform(hex.begin(), hex.end(), hex.begin(),
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[](unsigned char c) { return std::tolower(c); });
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if (!hex.empty() && hex[0] == '#') hex.erase(0, 1);
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auto fromHexC = [](char c) -> int {
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if (c >= '0' && c <= '9') return c - '0';
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if (c >= 'a' && c <= 'f') return 10 + c - 'a';
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return -1;
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};
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int v[6];
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if (hex.size() == 6) {
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for (int k = 0; k < 6; ++k) {
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v[k] = fromHexC(hex[k]);
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if (v[k] < 0) return false;
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}
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r = static_cast<uint8_t>((v[0] << 4) | v[1]);
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g = static_cast<uint8_t>((v[2] << 4) | v[3]);
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b = static_cast<uint8_t>((v[4] << 4) | v[5]);
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return true;
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}
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if (hex.size() == 3) {
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for (int k = 0; k < 3; ++k) {
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v[k] = fromHexC(hex[k]);
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if (v[k] < 0) return false;
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}
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r = static_cast<uint8_t>((v[0] << 4) | v[0]);
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g = static_cast<uint8_t>((v[1] << 4) | v[1]);
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b = static_cast<uint8_t>((v[2] << 4) | v[2]);
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return true;
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}
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return false;
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};
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uint8_t r0, g0, b0, r1, g1, b1;
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if (!parseHex(fromHex, r0, g0, b0)) {
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std::fprintf(stderr,
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"gen-texture-gradient: '%s' is not a valid hex color\n",
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fromHex.c_str());
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return 1;
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}
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if (!parseHex(toHex, r1, g1, b1)) {
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std::fprintf(stderr,
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"gen-texture-gradient: '%s' is not a valid hex color\n",
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toHex.c_str());
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return 1;
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}
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std::vector<uint8_t> pixels(static_cast<size_t>(W) * H * 3, 0);
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for (int y = 0; y < H; ++y) {
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for (int x = 0; x < W; ++x) {
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float t;
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if (horizontal) {
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t = (W <= 1) ? 0.0f : float(x) / float(W - 1);
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} else {
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t = (H <= 1) ? 0.0f : float(y) / float(H - 1);
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}
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auto lerp = [](uint8_t a, uint8_t b, float t) {
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return static_cast<uint8_t>(a + (b - a) * t + 0.5f);
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};
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size_t i2 = (static_cast<size_t>(y) * W + x) * 3;
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pixels[i2 + 0] = lerp(r0, r1, t);
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pixels[i2 + 1] = lerp(g0, g1, t);
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pixels[i2 + 2] = lerp(b0, b1, t);
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}
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}
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if (!stbi_write_png(outPath.c_str(), W, H, 3,
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pixels.data(), W * 3)) {
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std::fprintf(stderr,
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"gen-texture-gradient: stbi_write_png failed for %s\n",
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outPath.c_str());
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return 1;
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}
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std::printf("Wrote %s\n", outPath.c_str());
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std::printf(" size : %dx%d\n", W, H);
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std::printf(" direction : %s\n",
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horizontal ? "horizontal" : "vertical");
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std::printf(" from : %s (rgb %u,%u,%u)\n",
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fromHex.c_str(), r0, g0, b0);
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std::printf(" to : %s (rgb %u,%u,%u)\n",
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toHex.c_str(), r1, g1, b1);
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return 0;
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} else if (std::strcmp(argv[i], "--gen-mesh") == 0 && i + 2 < argc) {
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// Synthesize a procedural primitive WOM. Generates proper
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// per-face normals, planar UVs, a bounding box, and a
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