feat(editor): add --gen-mesh-chalice ceremonial goblet

82nd procedural mesh primitive. 3-tier ceremonial chalice:

  • foot — wide flat base disc (the goblet's footprint on
    the table)
  • stem — thin tall connecting column (the holding-grip)
  • bowl — wider shallow cup at the top

Validates that stemR < both footR and bowlR so the
silhouette always reads as the classic wide-narrow-wide
goblet shape rather than a degenerate cylinder stack.

Three more primitives that consume the addClosedCylinderY
helper this batch (lantern + chalice from the previous
two commits + this), pattern is now well-established.

Useful for chapel altars, treasure rooms, royal-court
banquet tables, ritual / cult scenes, dwarven mead halls,
fairy-tale storybook props. Watertight under weld
(verified 252 manifold edges, 0 boundary, 0 non-manifold).

Milestone: kArgRequired now reaches 420 documented flags.

tools/editor/cli_arg_required.cpp

@@ -61,7 +61,7 @@ const char* const kArgRequired[] = {
     "--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-candle",
-    "--gen-mesh-lantern",
+    "--gen-mesh-lantern", "--gen-mesh-chalice",
     "--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 +5161,57 @@ int handleTent(int& i, int argc, char** argv) {
     return 0;
 }
 
+int handleChalice(int& i, int argc, char** argv) {
+    // Ceremonial chalice / goblet: foot (wide flat base) →
+    // stem (thin tall connecting column) → bowl (wider shallow
+    // cup). 3-tier vertical-cylinder shape with the classic
+    // wide-narrow-wide silhouette of a wine goblet. The 82nd
+    // procedural mesh primitive.
+    std::string womBase = argv[++i];
+    float footR  = 0.10f;
+    float footH  = 0.02f;
+    float stemR  = 0.025f;
+    float stemH  = 0.16f;
+    float bowlR  = 0.09f;
+    float bowlH  = 0.10f;
+    int   sides  = 14;
+    parseOptFloat(i, argc, argv, footR);
+    parseOptFloat(i, argc, argv, footH);
+    parseOptFloat(i, argc, argv, stemR);
+    parseOptFloat(i, argc, argv, stemH);
+    parseOptFloat(i, argc, argv, bowlR);
+    parseOptFloat(i, argc, argv, bowlH);
+    parseOptInt(i, argc, argv, sides);
+    if (footR <= 0 || footH <= 0 || stemR <= 0 || stemH <= 0 ||
+        bowlR <= 0 || bowlH <= 0 || sides < 6 || sides > 64 ||
+        stemR >= footR || stemR >= bowlR) {
+        std::fprintf(stderr,
+            "gen-mesh-chalice: dims > 0; sides 6..64; "
+            "stemR < footR; stemR < bowlR\n");
+        return 1;
+    }
+    stripExt(womBase, ".wom");
+    wowee::pipeline::WoweeModel wom;
+    initWomDefaults(wom, womBase);
+    float y = 0.0f;
+    addClosedCylinderY(wom, footR, y, y + footH, sides);
+    y += footH;
+    addClosedCylinderY(wom, stemR, y, y + stemH, sides);
+    y += stemH;
+    addClosedCylinderY(wom, bowlR, y, y + bowlH, sides);
+    y += bowlH;
+    finalizeAsSingleBatch(wom);
+    float maxR = std::max({footR, stemR, bowlR});
+    setCenteredBoundsXZ(wom, maxR, maxR, y);
+    if (!saveWomOrError(wom, womBase, "gen-mesh-chalice")) return 1;
+    printWomWrote(womBase);
+    std::printf("  foot/stem/bowl : R=%.3f / %.3f / %.3f\n",
+                footR, stemR, bowlR);
+    std::printf("  total H    : %.3f (%d sides)\n", y, sides);
+    printWomMeshStats(wom);
+    return 0;
+}
+
 int handleLantern(int& i, int argc, char** argv) {
     // Hand lantern: small base disc → wider glass-globe cylinder
     // → narrow neck → wider top cap. 4 cylindrical tiers stacked,
@@ -7281,6 +7332,7 @@ constexpr MeshEntry kMeshTable[] = {
     {"--gen-mesh-urn",            1, handleUrn},
     {"--gen-mesh-candle",         1, handleCandle},
     {"--gen-mesh-lantern",        1, handleLantern},
+    {"--gen-mesh-chalice",        1, handleChalice},
     {"--gen-camp-pack",           1, handleGenCampPack},
     {"--gen-blacksmith-pack",     1, handleGenBlacksmithPack},
     {"--gen-village-pack",        1, handleGenVillagePack},

tools/editor/cli_help.cpp

@@ -316,6 +316,8 @@ void printUsage(const char* argv0) {
     std::printf("                         Candle: thin wax pillar on optional saucer base (set saucerR=0 to skip) — chapels / vigil scenes\n");
     std::printf("  --gen-mesh-lantern <wom-base> [baseR] [baseH] [globeR] [globeH] [neckR] [neckH] [capR] [capH] [sides]\n");
     std::printf("                         Lantern: 4-tier base + glass-globe + neck + cap stack (hand lantern / oil lamp silhouette)\n");
+    std::printf("  --gen-mesh-chalice <wom-base> [footR] [footH] [stemR] [stemH] [bowlR] [bowlH] [sides]\n");
+    std::printf("                         Chalice: ceremonial 3-tier foot + stem + bowl goblet (chapel / treasure / ritual scene)\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");