Fix typo.

Implementing Variant resolver(W.I.P.)

examples/tusdcat/main.cc

@@ -49,7 +49,7 @@ int main(int argc, char **argv) {
   bool has_flatten{false};
   bool has_relative{false};
   bool has_extract_variants{false};
-  
+
   constexpr int kMaxIteration = 128;
 
   std::string filepath;
@@ -196,12 +196,12 @@ int main(int argc, char **argv) {
       src_layer = std::move(composited_layer);
     }
 
-    // TODO: Find more better way to Recursively resolve references/payload
+    // TODO: Find more better way to Recursively resolve references/payload/variants
     bool all_resolved = true;
     for (int i = 0; i < kMaxIteration; i++) {
 
       if (comp_features.references) {
-        if (!src_layer.check_unresoled_references()) {
+        if (!src_layer.check_unresolved_references()) {
           all_resolved = true;
         } else {
           all_resolved = false;
@@ -224,7 +224,7 @@ int main(int argc, char **argv) {
       }
 
       if (comp_features.payload) {
-        if (!src_layer.check_unresoled_payload()) {
+        if (!src_layer.check_unresolved_payload()) {
           all_resolved = true;
         } else {
           all_resolved = false;
@@ -247,7 +247,7 @@ int main(int argc, char **argv) {
       }
 
       // TODO... more composition features
-      
+
 
       if (all_resolved) {
         std::cout << "# of composition resolve iteration: " << (i + 1) << "\n";

src/composition.cc

@@ -1005,7 +1005,7 @@ bool HasReferences(const Layer &layer, const bool force_check,
     return layer.has_unresolved_references();
   }
 
-  return layer.check_unresoled_references(options.max_depth);
+  return layer.check_unresolved_references(options.max_depth);
 }
 
 bool HasPayload(const Layer &layer, const bool force_check,
@@ -1014,7 +1014,7 @@ bool HasPayload(const Layer &layer, const bool force_check,
     return layer.has_unresolved_payload();
   }
 
-  return layer.check_unresoled_payload(options.max_depth);
+  return layer.check_unresolved_payload(options.max_depth);
 }
 
 namespace {
@@ -1157,7 +1157,7 @@ bool ExtractVariantsRec(uint32_t depth, const std::string &root_path,
         }
 
         vsetdict[item.first] = variantStmtNames;
-      } 
+      }
     }
 
     if (vsetdict.size()) {
@@ -1218,4 +1218,94 @@ bool ExtractVariants(const Stage &stage, Dictionary *dict, std::string *err) {
   return true;
 }
 
+bool VariantSelectPrimSpec(PrimSpec &dst, const PrimSpec &src,
+                           const std::map<std::string, std::string> &variant_selection, std::string *warn,
+                           std::string *err) {
+
+  if (src.metas().variants && src.metas().variantSets) {
+    // ok
+  } else if (src.metas().variants) {
+    if (warn) {
+      (*warn) += "`variants` are authored, but `variantSets` is not authored.\n";
+    }
+    dst = src;
+    dst.metas().variants.reset();
+    dst.metas().variantSets.reset();
+    dst.variantSets().clear();
+    return true;
+  } else if (src.metas().variantSets) {
+    if (warn) {
+      (*warn) += "`variantSets` are authored, but `variants` is not authored.\n";
+    }
+    dst = src;
+    dst.metas().variants.reset();
+    dst.metas().variantSets.reset();
+    dst.variantSets().clear();
+    // nothing to do.
+    return true;
+  }
+
+  const auto &variantSetMeta = src.metas().variantSets.value();
+
+  const ListEditQual qual = variantSetMeta.first;
+  (void)qual;
+
+  dst = src;
+
+  for (const auto &item : variant_selection) {
+
+    // Check if variantSet name exists in metadata.
+    const auto it = std::find_if(variantSetMeta.second.begin(), variantSetMeta.second.end(), [&](const std::string &name) {
+      if (name == item.first) {
+        return true;
+      }
+      return false;
+    });
+
+    if (it == variantSetMeta.second.end()) {
+      continue;
+    }
+
+    if (dst.variantSets().count(item.first)) {
+      const auto &vss = dst.variantSets().at(item.first);
+
+      if (vss.variantSet.count(item.second)) {
+        const PrimSpec &vs = vss.variantSet.at(item.second);
+
+        //
+        // Promote variant content to this Prim.
+        // Some notes:
+        // - local metadataum and property always wins.
+        //
+
+        // over-like operation
+        dst.metas().update_from(vs.metas());
+
+        for (const auto &prop : vs.props()) {
+          // local wins
+          if (!dst.props().count(prop.first)) {
+            dst.props().emplace(prop.first, prop.second);
+          }
+        }
+
+        // TODO:
+        // - [ ] primChildren
+        // - [ ] update `primChildren` and `properties` metadataum if required.
+        if (err) {
+          (*err) += "TODO: implement.\n";
+        }
+
+        return false;
+
+      }
+    }
+
+  }
+
+  dst.variantSets().clear();
+
+  return true;
+}
+
+
 }  // namespace tinyusdz

src/composition.hh

@@ -165,12 +165,12 @@ bool ListVariantSelectionMaps(const Layer &layer, VariantSelectorMap &m);
 ///
 /// @param[inout] dst PrimSpec where selected variant are written.
 /// @param[in] src Source PrimSpec. Source PrimSpec.
+/// @param[in] variant_selection Variant Selection list. key = variantSet name, value = variant name.
 ///
-/// @return true upon success. false when error(e.g. no corresponding
-/// `variant_name` exists in `src` PrimSpec).
+/// @return true upon success. false when error. No error when any of variant_selection does not exist in `src` PrimSpec.
 ///
 bool VariantSelectPrimSpec(PrimSpec &dst, const PrimSpec &src,
-                           const std::string &variant_name, std::string *warn,
+                           const std::map<std::string, std::string> &variant_selection, std::string *warn,
                            std::string *err);
 
 ///

src/prim-types.cc

@@ -1849,6 +1849,30 @@ bool HasPayloadRec(uint32_t depth,
 
 }
 
+bool HasVariantRec(uint32_t depth,
+                      const PrimSpec &primspec,
+                      const uint32_t max_depth = 1024*128) {
+  if (depth > max_depth) {
+    // too deep
+    return false;
+  }
+
+  // TODO: Also check if PrimSpec::variantSets is empty?
+  if (primspec.metas().variants && primspec.metas().variantSets) {
+    return true;
+  }
+
+  for (auto &child : primspec.children()) {
+    if (HasPayloadRec(depth + 1, child,
+                                max_depth)) {
+      return true;
+    }
+  }
+
+  return false;
+
+}
+
 } // namespace
 
 bool Layer::find_primspec_at(const Path &path, const PrimSpec **ps, std::string *err) {
@@ -1910,7 +1934,7 @@ bool Layer::find_primspec_at(const Path &path, const PrimSpec **ps, std::string
   return false;
 }
 
-bool Layer::check_unresoled_references(const uint32_t max_depth) const {
+bool Layer::check_unresolved_references(const uint32_t max_depth) const {
 
   bool ret = false;
 
@@ -1926,7 +1950,7 @@ bool Layer::check_unresoled_references(const uint32_t max_depth) const {
   return _has_unresolved_references;
 }
 
-bool Layer::check_unresoled_payload(const uint32_t max_depth) const {
+bool Layer::check_unresolved_payload(const uint32_t max_depth) const {
 
   bool ret = false;
 
@@ -1942,4 +1966,20 @@ bool Layer::check_unresoled_payload(const uint32_t max_depth) const {
   return _has_unresolved_payload;
 }
 
+bool Layer::check_unresolved_variant(const uint32_t max_depth) const {
+
+  bool ret = false;
+
+  for (const auto &item : _prim_specs) {
+    if (HasVariantRec(/* depth */0,
+      item.second, max_depth)) {
+      ret = true;
+      break;
+    }
+  }
+
+  _has_unresolved_variant = ret;
+  return _has_unresolved_variant;
+}
+
 }  // namespace tinyusdz

src/prim-types.hh

@@ -3424,7 +3424,7 @@ struct Layer {
   /// @param[in] max_depth Maximum PrimSpec traversal depth.
   /// @returns true if PrimSpec tree contains any (unresolved) `references`. false if not.
   ///
-  bool check_unresoled_references(const uint32_t max_depth = 1024 * 1024) const;
+  bool check_unresolved_references(const uint32_t max_depth = 1024 * 1024) const;
 
   ///
   /// Check if PrimSpec tree contains any `payload` and cache the result.
@@ -3432,7 +3432,7 @@ struct Layer {
   /// @param[in] max_depth Maximum PrimSpec traversal depth.
   /// @returns true if PrimSpec tree contains any (unresolved) `payload`. false if not.
   ///
-  bool check_unresoled_payload(const uint32_t max_depth = 1024 * 1024) const;
+  bool check_unresolved_payload(const uint32_t max_depth = 1024 * 1024) const;
 
   ///
   /// Check if PrimSpec tree contains any `variant` and cache the result.
@@ -3440,7 +3440,7 @@ struct Layer {
   /// @param[in] max_depth Maximum PrimSpec traversal depth.
   /// @returns true if PrimSpec tree contains any (unresolved) `variant`. false if not.
   ///
-  bool check_unresoled_variant(const uint32_t max_depth = 1024 * 1024) const;
+  bool check_unresolved_variant(const uint32_t max_depth = 1024 * 1024) const;
 
   ///
   /// Check if PrimSpec tree contains any Prim with `over` specifier and cache the result.

tests/usda/variantSet-listop-append-001.usda

@@ -0,0 +1,15 @@
+#usda 1.0
+
+def Xform "Implicits" (
+    variants = { string shapeVariant = "Capsule" }
+    append variantSets = "shapeVariant"
+)
+{
+    float myval = 1.0
+
+    variantSet "shapeVariant" = {
+        "Capsule" {
+            float myval = 2.0
+        }
+    }
+}

tests/usda/variantSet-nometa-001.usda

@@ -0,0 +1,18 @@
+#usda 1.0
+
+def "bora" (
+)
+{
+    variantSet "shapeVariant" = {
+        "Capsule" {
+	    def Skeleketon "myskel" {
+            }
+        }
+        "Cone" {
+	    def Xform "myxform" {
+               def Mesh "mymesh" {
+               }
+            }
+        }
+    }
+}

tests/usda/variants-only-001.usda

@@ -0,0 +1,13 @@
+#usda 1.0
+(
+    defaultPrim = "hello"
+)
+
+def Xform "hello" (
+    variants = {
+        string shadingVariant = "green"
+    }
+)
+{
+
+}