Rename vertex-specific functions in FCesiumFeatureIdAttribute

CHANGES.md

@@ -5,6 +5,8 @@
 ##### Breaking Changes :mega:
 
 - Removed support for Unreal Engine 5.2. Unreal Engine 5.3 or later is now required.
+- Renamed `FCesiumFeatureIdAttribute::GetFeatureIDForVertex` to `FCesiumFeatureIdAttribute::GetFeatureID`.
+- Renamed `FCesiumFeatureIdAttribute::GetVertexCount` to `FCesiumFeatureIdAttribute::GetCount`.
 
 ### v2.11.0 - 2024-12-02
 

Config/Engine.ini

@@ -158,4 +158,8 @@ AspectRatioAxisConstraint=AspectRatio_MaintainXFOV
 +PropertyRedirects=(OldName="CesiumWebMapTileServiceRasterOverlay.South", NewName="CesiumWebMapTileServiceRasterOverlay.RectangleSouth")
 +PropertyRedirects=(OldName="CesiumWebMapTileServiceRasterOverlay.East", NewName="CesiumWebMapTileServiceRasterOverlay.RectangleEast")
 +PropertyRedirects=(OldName="CesiumWebMapTileServiceRasterOverlay.North", NewName="CesiumWebMapTileServiceRasterOverlay.RectangleNorth")
-+PropertyRedirects=(OldName="CesiumWebMapTileServiceRasterOverlay.UseWebMercatorProjection", NewName="CesiumWebMapTileServiceRasterOverlay.UseWebMercatorProjection_DEPRECATED")
++PropertyRedirects=(OldName="CesiumWebMapTileServiceRasterOverlay.UseWebMercatorProjection", NewName="CesiumWebMapTileServiceRasterOverlay.UseWebMercatorProjection_DEPRECATED")
+
++FunctionRedirects=(OldName="CesiumFeatureIdAttributeBlueprintLibrary.GetFeatureIDForVertex", NewName="CesiumFeatureIdAttributeBlueprintLibrary.GetFeatureID")
++PropertyRedirects=(OldName="CesiumFeatureIdAttributeBlueprintLibrary.GetFeatureIDForVertex.VertexIndex", NewName="CesiumFeatureIdAttributeBlueprintLibrary.GetFeatureID.Index")
++FunctionRedirects=(OldName="CesiumFeatureIdAttributeBlueprintLibrary.GetVertexCount", NewName="CesiumFeatureIdAttributeBlueprintLibrary.GetCount")

Source/CesiumRuntime/Private/CesiumFeatureIdAttribute.cpp

@@ -73,17 +73,17 @@ UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureIDAttributeStatus(
   return FeatureIDAttribute._status;
 }
 
-int64 UCesiumFeatureIdAttributeBlueprintLibrary::GetVertexCount(
+int64 UCesiumFeatureIdAttributeBlueprintLibrary::GetCount(
     UPARAM(ref) const FCesiumFeatureIdAttribute& FeatureIDAttribute) {
   return std::visit(
       CesiumGltf::CountFromAccessor{},
       FeatureIDAttribute._featureIdAccessor);
 }
 
-int64 UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureIDForVertex(
+int64 UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
     UPARAM(ref) const FCesiumFeatureIdAttribute& FeatureIDAttribute,
-    int64 VertexIndex) {
+    int64 Index) {
   return std::visit(
-      CesiumGltf::FeatureIdFromAccessor{VertexIndex},
+      CesiumGltf::FeatureIdFromAccessor{Index},
       FeatureIDAttribute._featureIdAccessor);
 }

Source/CesiumRuntime/Private/CesiumFeatureIdSet.cpp

@@ -152,7 +152,7 @@ int64 UCesiumFeatureIdSetBlueprintLibrary::GetFeatureIDForVertex(
   if (FeatureIDSet._featureIDSetType == ECesiumFeatureIdSetType::Attribute) {
     FCesiumFeatureIdAttribute attribute =
         std::get<FCesiumFeatureIdAttribute>(FeatureIDSet._featureID);
-    return UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureIDForVertex(
+    return UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
         attribute,
         VertexIndex);
   }
@@ -189,7 +189,7 @@ int64 UCesiumFeatureIdSetBlueprintLibrary::GetFeatureIDForInstance(
   }
   const auto& featureIdAttribute =
       std::get<FCesiumFeatureIdAttribute>(FeatureIDSet._featureID);
-  return UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureIDForVertex(
+  return UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
       featureIdAttribute,
       InstanceIndex);
 }
@@ -239,7 +239,7 @@ int64 UCesiumFeatureIdSetBlueprintLibrary::GetFeatureIDFromHit(
   if (FeatureIDSet._featureIDSetType == ECesiumFeatureIdSetType::Attribute) {
     FCesiumFeatureIdAttribute attribute =
         std::get<FCesiumFeatureIdAttribute>(FeatureIDSet._featureID);
-    return UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureIDForVertex(
+    return UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
         attribute,
         VertexIndex);
   }

Source/CesiumRuntime/Private/CesiumGltfComponent.cpp

@@ -719,9 +719,10 @@ static void updateTextureCoordinatesForFeaturesMetadata(
           UCesiumFeatureIdSetBlueprintLibrary::GetAsFeatureIDAttribute(
               featureIDSet);
 
-      int64 vertexCount =
-          UCesiumFeatureIdAttributeBlueprintLibrary::GetVertexCount(
-              featureIDAttribute);
+      // Each feature ID corresponds to a vertex, so the vertex count is just
+      // the length of the attribute.
+      int64 vertexCount = UCesiumFeatureIdAttributeBlueprintLibrary::GetCount(
+          featureIDAttribute);
 
       // We encode unsigned integer feature ids as floats in the u-channel of
       // a texture coordinate slot.
@@ -731,8 +732,9 @@ static void updateTextureCoordinatesForFeaturesMetadata(
           uint32 vertexIndex = indices[i];
           if (vertexIndex >= 0 && vertexIndex < vertexCount) {
             float featureId = static_cast<float>(
-                UCesiumFeatureIdAttributeBlueprintLibrary::
-                    GetFeatureIDForVertex(featureIDAttribute, vertexIndex));
+                UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
+                    featureIDAttribute,
+                    vertexIndex));
             vertex.UVs[textureCoordinateIndex] = TMeshVector2(featureId, 0.0f);
           } else {
             vertex.UVs[textureCoordinateIndex] = TMeshVector2(0.0f, 0.0f);
@@ -743,8 +745,9 @@ static void updateTextureCoordinatesForFeaturesMetadata(
           FStaticMeshBuildVertex& vertex = vertices[i];
           if (i < vertexCount) {
             float featureId = static_cast<float>(
-                UCesiumFeatureIdAttributeBlueprintLibrary::
-                    GetFeatureIDForVertex(featureIDAttribute, i));
+                UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
+                    featureIDAttribute,
+                    i));
             vertex.UVs[textureCoordinateIndex] = TMeshVector2(featureId, 0.0f);
           } else {
             vertex.UVs[textureCoordinateIndex] = TMeshVector2(0.0f, 0.0f);
@@ -876,9 +879,10 @@ static void updateTextureCoordinatesForMetadata_DEPRECATED(
           encodedFeatureIdAttribute.name,
           textureCoordinateIndex);
 
-      int64 vertexCount =
-          UCesiumFeatureIdAttributeBlueprintLibrary::GetVertexCount(
-              featureIdAttribute);
+      // Each feature ID corresponds to a vertex, so the vertex count is just
+      // the length of the attribute.
+      int64 vertexCount = UCesiumFeatureIdAttributeBlueprintLibrary::GetCount(
+          featureIdAttribute);
 
       // We encode unsigned integer feature ids as floats in the u-channel of
       // a texture coordinate slot.
@@ -888,8 +892,9 @@ static void updateTextureCoordinatesForMetadata_DEPRECATED(
           uint32 vertexIndex = indices[i];
           if (vertexIndex >= 0 && vertexIndex < vertexCount) {
             float featureId = static_cast<float>(
-                UCesiumFeatureIdAttributeBlueprintLibrary::
-                    GetFeatureIDForVertex(featureIdAttribute, vertexIndex));
+                UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
+                    featureIdAttribute,
+                    vertexIndex));
             vertex.UVs[textureCoordinateIndex] = TMeshVector2(featureId, 0.0f);
           } else {
             vertex.UVs[textureCoordinateIndex] = TMeshVector2(0.0f, 0.0f);
@@ -900,8 +905,9 @@ static void updateTextureCoordinatesForMetadata_DEPRECATED(
           FStaticMeshBuildVertex& vertex = vertices[i];
           if (i < vertexCount) {
             float featureId = static_cast<float>(
-                UCesiumFeatureIdAttributeBlueprintLibrary::
-                    GetFeatureIDForVertex(featureIdAttribute, i));
+                UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
+                    featureIdAttribute,
+                    i));
             vertex.UVs[textureCoordinateIndex] = TMeshVector2(featureId, 0.0f);
           } else {
             vertex.UVs[textureCoordinateIndex] = TMeshVector2(0.0f, 0.0f);

Source/CesiumRuntime/Private/CesiumMetadataUtilityBlueprintLibrary.cpp

@@ -100,7 +100,7 @@ int64 UCesiumMetadataUtilityBlueprintLibrary::GetFeatureIDFromFaceID(
     UPARAM(ref) const FCesiumMetadataPrimitive& Primitive,
     UPARAM(ref) const FCesiumFeatureIdAttribute& FeatureIDAttribute,
     int64 FaceID) {
-  return UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureIDForVertex(
+  return UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
       FeatureIDAttribute,
       UCesiumMetadataPrimitiveBlueprintLibrary::GetFirstVertexIDFromFaceID(
           Primitive,

Source/CesiumRuntime/Private/Tests/CesiumFeatureIdAttribute.spec.cpp

@@ -126,7 +126,7 @@ void FCesiumFeatureIdAttributeSpec::Define() {
     });
   });
 
-  Describe("GetVertexCount", [this]() {
+  Describe("GetCount", [this]() {
     BeforeEach([this]() {
       model = CesiumGltf::Model();
       CesiumGltf::Mesh& mesh = model.meshes.emplace_back();
@@ -149,7 +149,7 @@ void FCesiumFeatureIdAttributeSpec::Define() {
           ECesiumFeatureIdAttributeStatus::ErrorInvalidAccessor);
       TestEqual(
           "VertexCount",
-          UCesiumFeatureIdAttributeBlueprintLibrary::GetVertexCount(
+          UCesiumFeatureIdAttributeBlueprintLibrary::GetCount(
               featureIDAttribute),
           0);
     });
@@ -177,13 +177,13 @@ void FCesiumFeatureIdAttributeSpec::Define() {
           ECesiumFeatureIdAttributeStatus::Valid);
       TestEqual(
           "VertexCount",
-          UCesiumFeatureIdAttributeBlueprintLibrary::GetVertexCount(
+          UCesiumFeatureIdAttributeBlueprintLibrary::GetCount(
               featureIDAttribute),
           vertexCount);
     });
   });
 
-  Describe("GetFeatureIDForVertex", [this]() {
+  Describe("GetFeatureID", [this]() {
     BeforeEach([this]() {
       model = CesiumGltf::Model();
       CesiumGltf::Mesh& mesh = model.meshes.emplace_back();
@@ -206,7 +206,7 @@ void FCesiumFeatureIdAttributeSpec::Define() {
           ECesiumFeatureIdAttributeStatus::ErrorInvalidAccessor);
       TestEqual(
           "FeatureIDForVertex",
-          UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureIDForVertex(
+          UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
               featureIDAttribute,
               0),
           -1);
@@ -234,13 +234,13 @@ void FCesiumFeatureIdAttributeSpec::Define() {
           ECesiumFeatureIdAttributeStatus::Valid);
       TestEqual(
           "FeatureIDForNegativeVertex",
-          UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureIDForVertex(
+          UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
               featureIDAttribute,
               -1),
           -1);
       TestEqual(
           "FeatureIDForOutOfBoundsVertex",
-          UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureIDForVertex(
+          UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
               featureIDAttribute,
               10),
           -1);
@@ -269,7 +269,7 @@ void FCesiumFeatureIdAttributeSpec::Define() {
       for (size_t i = 0; i < featureIDs.size(); i++) {
         TestEqual(
             "FeatureIDForVertex",
-            UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureIDForVertex(
+            UCesiumFeatureIdAttributeBlueprintLibrary::GetFeatureID(
                 featureIDAttribute,
                 static_cast<int64>(i)),
             featureIDs[i]);

Source/CesiumRuntime/Public/CesiumFeatureIdAttribute.h

@@ -28,8 +28,9 @@ enum class ECesiumFeatureIdAttributeStatus : uint8 {
 
 /**
  * @brief A blueprint-accessible wrapper for a feature ID attribute from a glTF
- * primitive. Provides access to per-vertex feature IDs which can be used with
- * the corresponding {@link FCesiumPropertyTable} to access per-vertex metadata.
+ * model. Provides access to feature IDs which can be used with the
+ * corresponding {@link FCesiumPropertyTable} to access metadata. These feature
+ * IDs may be defined per-vertex or per-instance.
  */
 USTRUCT(BlueprintType)
 struct CESIUMRUNTIME_API FCesiumFeatureIdAttribute {
@@ -109,7 +110,6 @@ class CESIUMRUNTIME_API UCesiumFeatureIdAttributeBlueprintLibrary
   UFUNCTION(
       BlueprintCallable,
       BlueprintPure,
-      Category = "Cesium|Metadata|FeatureIdAttribute",
       Meta =
           (DeprecatedFunction,
            DeprecationMessage =
@@ -131,27 +131,35 @@ class CESIUMRUNTIME_API UCesiumFeatureIdAttributeBlueprintLibrary
       UPARAM(ref) const FCesiumFeatureIdAttribute& FeatureIDAttribute);
 
   /**
-   * Get the number of vertices in the primitive containing the feature
-   * ID attribute. If the feature ID attribute is invalid, this returns 0.
+   * Gets the number of elements in the attribute. This is distinct from the
+   * number of unique feature IDs within the attribute.
+   *
+   * For a feature ID attribute of a regular mesh, this is the number of
+   * vertices. For a per-instance feature ID, this is the number of instances.
+   *
+   * If the feature ID attribute is invalid, this returns 0.
    */
   UFUNCTION(
       BlueprintCallable,
       BlueprintPure,
       Category = "Cesium|Features|FeatureIDAttribute")
   static int64
-  GetVertexCount(UPARAM(ref)
-                     const FCesiumFeatureIdAttribute& FeatureIDAttribute);
+  GetCount(UPARAM(ref) const FCesiumFeatureIdAttribute& FeatureIDAttribute);
 
   /**
-   * Gets the feature ID associated with the given vertex. The feature ID can be
-   * used with a FCesiumFeatureTable to retrieve the per-vertex metadata. If
-   * the feature ID attribute is invalid, this returns -1.
+   * Gets the feature ID at the given index. A feature ID can be used with a
+   * FCesiumPropertyTable to retrieve the metadata for that ID. If the feature
+   * ID attribute is invalid, this returns -1.
+   *
+   * For a feature ID attribute of a regular mesh, the provided Index is the
+   * index of a vertex within the mesh. For a per-instance feature ID, the
+   * provided Index is the index of the instance.
    */
   UFUNCTION(
       BlueprintCallable,
       BlueprintPure,
       Category = "Cesium|Features|FeatureIDAttribute")
-  static int64 GetFeatureIDForVertex(
+  static int64 GetFeatureID(
       UPARAM(ref) const FCesiumFeatureIdAttribute& FeatureIDAttribute,
-      int64 VertexIndex);
+      int64 Index);
 };