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feat(editor): add --export-wob-obj for buildings -> Wavefront OBJ
WOM (the open M2 replacement) already round-trips through OBJ; this extends the universal-format bridge to WOB (the open WMO replacement) so buildings can also be edited in Blender / MeshLab / Maya / etc. wowee_editor --export-wob-obj House # writes House.obj wowee_editor --export-wob-obj House out.obj # custom path Mapping decisions: - Each WOB group becomes one OBJ 'g' block (named after the group; outdoor groups get an '_outdoor' suffix). Preserves the room/floor structure for downstream selection and per-area editing. - Single global vertex pool with per-group offsets (OBJ requires v indices to be globally 1-based; we track a running vertOffset). - UV V flipped (1.0 - v) so texturing matches Blender bottom-left convention, same as --export-obj for WOM. - Doodad placements written as # comment lines at the end. OBJ has no native concept for instanced models, but emitting them as structured comments keeps the placement data recoverable for tools that want to re-instance them. - Portals and material flags drop on the floor — OBJ has no semantics for either. The native WOB always remains canonical. Verified on a synthesized 2-group house (4-vert floor + 3-vert wall, 1 doodad): output OBJ has 7 verts / 7 vt / 7 vn entries, 2 'g' blocks with proper index offsetting, doodad comment line preserved.
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Kelsi
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1 changed files with 98 additions and 1 deletions
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@ -429,6 +429,8 @@ static void printUsage(const char* argv0) {
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std::printf(" Convert a WOM model to Wavefront OBJ for use in Blender/MeshLab\n");
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std::printf(" --import-obj <obj-path> [wom-base]\n");
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std::printf(" Convert a Wavefront OBJ back into WOM (round-trips with --export-obj)\n");
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std::printf(" --export-wob-obj <wob-base> [out.obj]\n");
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std::printf(" Convert a WOB building to Wavefront OBJ (one group per WOB group)\n");
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std::printf(" --validate <zoneDir> [--json]\n");
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std::printf(" Score zone open-format completeness and exit\n");
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std::printf(" --validate-wom <wom-base> [--json]\n");
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@ -504,7 +506,7 @@ int main(int argc, char* argv[]) {
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"--remove-creature", "--remove-object", "--remove-quest",
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"--copy-zone",
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"--build-woc", "--regen-collision", "--fix-zone",
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"--export-png", "--export-obj", "--import-obj",
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"--export-png", "--export-obj", "--import-obj", "--export-wob-obj",
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"--convert-m2", "--convert-wmo",
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};
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for (int i = 1; i < argc; i++) {
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@ -2116,6 +2118,101 @@ int main(int argc, char* argv[]) {
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wom.vertices.size(), wom.indices.size() / 3,
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wom.batches.empty() ? size_t(1) : wom.batches.size());
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return 0;
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} else if (std::strcmp(argv[i], "--export-wob-obj") == 0 && i + 1 < argc) {
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// WOB is the WMO replacement; like --export-obj for WOM, this
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// bridges WOB into the universal-3D-tool ecosystem. Each WOB
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// group becomes one OBJ 'g' block, preserving the room/floor
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// structure for downstream selection in Blender/MeshLab.
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std::string base = argv[++i];
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std::string outPath;
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if (i + 1 < argc && argv[i + 1][0] != '-') {
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outPath = argv[++i];
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}
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if (base.size() >= 4 && base.substr(base.size() - 4) == ".wob")
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base = base.substr(0, base.size() - 4);
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if (!wowee::pipeline::WoweeBuildingLoader::exists(base)) {
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std::fprintf(stderr, "WOB not found: %s.wob\n", base.c_str());
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return 1;
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}
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if (outPath.empty()) outPath = base + ".obj";
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auto bld = wowee::pipeline::WoweeBuildingLoader::load(base);
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if (!bld.isValid()) {
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std::fprintf(stderr, "WOB has no groups to export: %s.wob\n", base.c_str());
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return 1;
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}
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std::ofstream obj(outPath);
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if (!obj) {
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std::fprintf(stderr, "Failed to open output file: %s\n", outPath.c_str());
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return 1;
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}
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// Total verts/tris across all groups for the header.
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size_t totalV = 0, totalI = 0;
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for (const auto& g : bld.groups) {
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totalV += g.vertices.size();
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totalI += g.indices.size();
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}
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obj << "# Wavefront OBJ generated by wowee_editor --export-wob-obj\n";
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obj << "# Source: " << base << ".wob\n";
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obj << "# Groups: " << bld.groups.size()
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<< " Verts: " << totalV
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<< " Tris: " << totalI / 3
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<< " Portals: " << bld.portals.size()
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<< " Doodads: " << bld.doodads.size() << "\n\n";
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obj << "o " << (bld.name.empty() ? "WoweeBuilding" : bld.name) << "\n";
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// OBJ uses a single global vertex pool, so we offset each group's
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// local indices by the running total of verts written so far.
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uint32_t vertOffset = 0;
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for (size_t g = 0; g < bld.groups.size(); ++g) {
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const auto& grp = bld.groups[g];
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if (grp.vertices.empty()) continue;
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for (const auto& v : grp.vertices) {
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obj << "v " << v.position.x << " "
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<< v.position.y << " "
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<< v.position.z << "\n";
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}
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for (const auto& v : grp.vertices) {
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obj << "vt " << v.texCoord.x << " "
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<< (1.0f - v.texCoord.y) << "\n";
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}
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for (const auto& v : grp.vertices) {
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obj << "vn " << v.normal.x << " "
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<< v.normal.y << " "
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<< v.normal.z << "\n";
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}
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std::string groupName = grp.name.empty()
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? "group_" + std::to_string(g)
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: grp.name;
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if (grp.isOutdoor) groupName += "_outdoor";
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obj << "g " << groupName << "\n";
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for (size_t k = 0; k + 2 < grp.indices.size(); k += 3) {
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uint32_t i0 = grp.indices[k] + 1 + vertOffset;
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uint32_t i1 = grp.indices[k + 1] + 1 + vertOffset;
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uint32_t i2 = grp.indices[k + 2] + 1 + vertOffset;
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obj << "f "
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<< i0 << "/" << i0 << "/" << i0 << " "
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<< i1 << "/" << i1 << "/" << i1 << " "
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<< i2 << "/" << i2 << "/" << i2 << "\n";
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}
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vertOffset += static_cast<uint32_t>(grp.vertices.size());
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}
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// Doodad placements as a separate informational block — emit
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// each as a comment line so OBJ stays valid but the data is
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// recoverable for tools that want to re-create the placements.
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if (!bld.doodads.empty()) {
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obj << "\n# Doodad placements (model, position, rotation, scale):\n";
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for (const auto& d : bld.doodads) {
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obj << "# doodad " << d.modelPath
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<< " pos " << d.position.x << "," << d.position.y << "," << d.position.z
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<< " rot " << d.rotation.x << "," << d.rotation.y << "," << d.rotation.z
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<< " scale " << d.scale << "\n";
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}
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}
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obj.close();
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std::printf("Exported %s.wob -> %s\n", base.c_str(), outPath.c_str());
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std::printf(" %zu groups, %zu verts, %zu tris, %zu doodad placements\n",
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bld.groups.size(), totalV, totalI / 3,
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bld.doodads.size());
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return 0;
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} else if (std::strcmp(argv[i], "--import-obj") == 0 && i + 1 < argc) {
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// Convert a Wavefront OBJ back into WOM. Round-trips with
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// --export-obj for the geometry/UV/normal data; bones,
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