feat(editor): add --gen-mesh-candle wax-pillar primitive

80th procedural mesh primitive. Wax pillar candle:

  • saucer (optional) — wider shallow disc base, the drip
    catcher that sits on the table
  • wax — thin tall pillar standing on the saucer (or
    directly on the ground if saucerR=0)

Uses the addClosedCylinderY helper for both pieces — same
two-cylinder pattern as --gen-mesh-bird-bath but with a
much skinnier upper cylinder. The 81-line handler is
mostly arg parsing + validation; geometry is just two
helper calls.

Useful for chapels / shrines, vigil scenes, witch-hut
ritual surfaces, alchemist labs, séance tables, festival-
of-lights ground decoration. Set saucerR=0 for a plain
candle without the saucer (e.g. for stack-them-on-a-cake
contexts).

Watertight under weld (verified — wax + saucer are two
independent closed cylinders).

Milestone: now at 80 procedural mesh primitives.

tools/editor/cli_arg_required.cpp

@@ -60,7 +60,7 @@ const char* const kArgRequired[] = {
     "--gen-mesh-stone-bench", "--gen-mesh-mine-cart",
     "--gen-mesh-hitching-rail", "--gen-mesh-pillar-row",
     "--gen-mesh-statue-base", "--gen-mesh-bird-bath",
-    "--gen-mesh-planter-box", "--gen-mesh-urn",
+    "--gen-mesh-planter-box", "--gen-mesh-urn", "--gen-mesh-candle",
     "--gen-camp-pack", "--gen-blacksmith-pack", "--gen-village-pack",
     "--gen-temple-pack", "--gen-graveyard-pack",
     "--gen-garden-pack", "--gen-dock-pack", "--gen-tavern-pack",

tools/editor/cli_gen_mesh.cpp

@@ -5161,6 +5161,55 @@ int handleTent(int& i, int argc, char** argv) {
     return 0;
 }
 
+int handleCandle(int& i, int argc, char** argv) {
+    // Wax pillar candle: thin tall wax cylinder optionally
+    // standing on a wider shallow saucer base (the drip catcher).
+    // Both pieces use addClosedCylinderY — same pattern as
+    // --gen-mesh-bird-bath but with a much skinnier upper
+    // cylinder. The 80th procedural mesh primitive.
+    std::string womBase = argv[++i];
+    float waxR  = 0.04f;
+    float waxH  = 0.30f;
+    float saucerR = 0.08f;       // 0 → no saucer
+    float saucerH = 0.015f;
+    int   sides = 14;
+    parseOptFloat(i, argc, argv, waxR);
+    parseOptFloat(i, argc, argv, waxH);
+    parseOptFloat(i, argc, argv, saucerR);
+    parseOptFloat(i, argc, argv, saucerH);
+    parseOptInt(i, argc, argv, sides);
+    if (waxR <= 0 || waxH <= 0 || saucerR < 0 ||
+        (saucerR > 0 && saucerR <= waxR) ||
+        (saucerR > 0 && saucerH <= 0) ||
+        sides < 6 || sides > 64) {
+        std::fprintf(stderr,
+            "gen-mesh-candle: dims > 0; saucerR > waxR (or 0); sides 6..64\n");
+        return 1;
+    }
+    stripExt(womBase, ".wom");
+    wowee::pipeline::WoweeModel wom;
+    initWomDefaults(wom, womBase);
+    float yBase = 0.0f;
+    if (saucerR > 0.0f) {
+        addClosedCylinderY(wom, saucerR, 0.0f, saucerH, sides);
+        yBase = saucerH;
+    }
+    addClosedCylinderY(wom, waxR, yBase, yBase + waxH, sides);
+    finalizeAsSingleBatch(wom);
+    float maxR = std::max(waxR, saucerR);
+    setCenteredBoundsXZ(wom, maxR, maxR, yBase + waxH);
+    if (!saveWomOrError(wom, womBase, "gen-mesh-candle")) return 1;
+    printWomWrote(womBase);
+    std::printf("  wax        : R=%.3f x %.3f tall\n", waxR, waxH);
+    if (saucerR > 0.0f)
+        std::printf("  saucer     : R=%.3f x %.3f thick\n", saucerR, saucerH);
+    else
+        std::printf("  saucer     : (none)\n");
+    std::printf("  sides      : %d\n", sides);
+    printWomMeshStats(wom);
+    return 0;
+}
+
 int handleUrn(int& i, int argc, char** argv) {
     // Multi-tier vertical urn: foot (wide short cylinder) →
     // body (tall main cylinder) → neck (narrow constriction) →
@@ -7264,6 +7313,7 @@ constexpr MeshEntry kMeshTable[] = {
     {"--gen-mesh-bird-bath",      1, handleBirdBath},
     {"--gen-mesh-planter-box",    1, handlePlanterBox},
     {"--gen-mesh-urn",            1, handleUrn},
+    {"--gen-mesh-candle",         1, handleCandle},
     {"--gen-camp-pack",           1, handleGenCampPack},
     {"--gen-blacksmith-pack",     1, handleGenBlacksmithPack},
     {"--gen-village-pack",        1, handleGenVillagePack},

tools/editor/cli_help.cpp

@@ -308,6 +308,8 @@ void printUsage(const char* argv0) {
     std::printf("                         Planter box: long open-top wood basin + visible soil-fill block (window sills / kitchen / balcony)\n");
     std::printf("  --gen-mesh-urn <wom-base> [bodyR] [bodyH] [footR] [footH] [neckR] [neckH] [lipR] [lipH] [sides]\n");
     std::printf("                         Urn: 4-tier vertical pottery vessel (foot + body + neck + lip) — temple / mausoleum / kitchen storage\n");
+    std::printf("  --gen-mesh-candle <wom-base> [waxR] [waxH] [saucerR] [saucerH] [sides]\n");
+    std::printf("                         Candle: thin wax pillar on optional saucer base (set saucerR=0 to skip) — chapels / vigil scenes\n");
     std::printf("  --gen-camp-pack <outDir>\n");
     std::printf("                         Convenience: emit tent + firepit + bedroll + canopy + woodpile + haystack into outDir as 6 .wom files\n");
     std::printf("  --gen-blacksmith-pack <outDir>\n");