CesiumPrimitiveFeatures.h

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// Copyright 2020-2024 CesiumGS, Inc. and Contributors
 
#pragma once
 
#include "CesiumFeatureIdSet.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "UObject/ObjectMacros.h"
#include <CesiumGltf/AccessorUtility.h>
 
#include "CesiumPrimitiveFeatures.generated.h"
 
namespace CesiumGltf {
struct ExtensionExtMeshFeatures;
struct ExtensionExtInstanceFeatures;
} // namespace CesiumGltf
 
USTRUCT(BlueprintType)
struct CESIUMRUNTIME_API FCesiumPrimitiveFeatures {
  GENERATED_USTRUCT_BODY()
 
public:
  FCesiumPrimitiveFeatures() : _vertexCount(0) {}
 
  FCesiumPrimitiveFeatures(
      const CesiumGltf::Model& Model,
      const CesiumGltf::MeshPrimitive& Primitive,
      const CesiumGltf::ExtensionExtMeshFeatures& Features);
 
  FCesiumPrimitiveFeatures(
      const CesiumGltf::Model& Model,
      const CesiumGltf::Node& Node,
      const CesiumGltf::ExtensionExtInstanceFeatures& InstanceFeatures);
 
private:
  TArray<FCesiumFeatureIdSet> _featureIdSets;
  CesiumGltf::IndexAccessorType _indexAccessor;
  // Vertex count = 0 and _primitiveMode = -1 indicates instance features
  int64_t _vertexCount;
  int32_t _primitiveMode;
 
  friend class UCesiumPrimitiveFeaturesBlueprintLibrary;
};
 
UCLASS()
class CESIUMRUNTIME_API UCesiumPrimitiveFeaturesBlueprintLibrary
    : public UBlueprintFunctionLibrary {
  GENERATED_BODY()
 
public:
  UFUNCTION(
      BlueprintCallable,
      BlueprintPure,
      Category = "Cesium|Primitive|Features")
  static const FCesiumPrimitiveFeatures&
  GetPrimitiveFeatures(const UPrimitiveComponent* component);
 
  UFUNCTION(
      BlueprintCallable,
      BlueprintPure,
      Category = "Cesium|Primitive|Features")
  static const TArray<FCesiumFeatureIdSet>&
  GetFeatureIDSets(UPARAM(ref)
                       const FCesiumPrimitiveFeatures& PrimitiveFeatures);
 
  UFUNCTION(
      BlueprintCallable,
      BlueprintPure,
      Category = "Cesium|Primitive|Features")
  static const TArray<FCesiumFeatureIdSet> GetFeatureIDSetsOfType(
      UPARAM(ref) const FCesiumPrimitiveFeatures& PrimitiveFeatures,
      ECesiumFeatureIdSetType Type);
 
  UFUNCTION(
      BlueprintCallable,
      BlueprintPure,
      Category = "Cesium|Primitive|Features")
  static int64
  GetVertexCount(UPARAM(ref) const FCesiumPrimitiveFeatures& PrimitiveFeatures);
 
  UFUNCTION(
      BlueprintCallable,
      BlueprintPure,
      Category = "Cesium|Primitive|Features")
  static int64 GetFirstVertexFromFace(
      UPARAM(ref) const FCesiumPrimitiveFeatures& PrimitiveFeatures,
      int64 FaceIndex);
 
  UFUNCTION(
      BlueprintCallable,
      BlueprintPure,
      Category = "Cesium|Primitive|Features")
  static int64 GetFeatureIDFromFace(
      UPARAM(ref) const FCesiumPrimitiveFeatures& PrimitiveFeatures,
      int64 FaceIndex,
      int64 FeatureIDSetIndex = 0);
 
  UFUNCTION(
      BlueprintCallable,
      BlueprintPure,
      Category = "Cesium|Primitive|Features")
  static int64 GetFeatureIDFromInstance(
      UPARAM(ref) const FCesiumPrimitiveFeatures& InstanceFeatures,
      int64 InstanceIndex,
      int64 FeatureIDSetIndex = 0);
 
  UFUNCTION(
      BlueprintCallable,
      BlueprintPure,
      Category = "Cesium|Primitive|Features")
  static int64 GetFeatureIDFromHit(
      UPARAM(ref) const FCesiumPrimitiveFeatures& PrimitiveFeatures,
      const FHitResult& Hit,
      int64 FeatureIDSetIndex = 0);
};