Add road intersection class

Source/Carla/RoadIntersection.cpp

@@ -0,0 +1,61 @@
+// CARLA, Copyright (C) 2017 Computer Vision Center (CVC)
+
+#include "Carla.h"
+#include "RoadIntersection.h"
+
+ARoadIntersection::ARoadIntersection(const FObjectInitializer& ObjectInitializer) :
+  Super(ObjectInitializer)
+{
+  PrimaryActorTick.bCanEverTick = false;
+
+  RootComponent =
+      ObjectInitializer.CreateDefaultSubobject<USceneComponent>(this, TEXT("RootComponent"));
+  RootComponent->SetMobility(EComponentMobility::Static);
+
+#define CARLA_CREATE_STATIC_MESH_COMPONENT(Mesh) \
+    { \
+      auto Component = CreateDefaultSubobject<UStaticMeshComponent>(TEXT(#Mesh) TEXT("Component")); \
+      Component->SetMobility(EComponentMobility::Static); \
+      Component->SetupAttachment(RootComponent); \
+      StaticMeshComponents.Add(Component); \
+      StaticMeshes.Add(ERoadIntersectionItem:: Mesh, nullptr); \
+    }
+  CARLA_CREATE_STATIC_MESH_COMPONENT(Lane0)
+  CARLA_CREATE_STATIC_MESH_COMPONENT(Lane1)
+  CARLA_CREATE_STATIC_MESH_COMPONENT(Lane2)
+  CARLA_CREATE_STATIC_MESH_COMPONENT(Lane3)
+  CARLA_CREATE_STATIC_MESH_COMPONENT(Sidewalk0)
+  CARLA_CREATE_STATIC_MESH_COMPONENT(Sidewalk1)
+  CARLA_CREATE_STATIC_MESH_COMPONENT(Sidewalk2)
+  CARLA_CREATE_STATIC_MESH_COMPONENT(Sidewalk3)
+  CARLA_CREATE_STATIC_MESH_COMPONENT(LaneMarking)
+#undef CARLA_CREATE_STATIC_MESH_COMPONENT
+}
+
+#if WITH_EDITOR
+void ARoadIntersection::PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent)
+{
+  Super::PostEditChangeProperty(PropertyChangedEvent);
+  if (PropertyChangedEvent.Property) {
+    UpdateMeshes();
+  }
+}
+#endif // WITH_EDITOR
+
+void ARoadIntersection::SetStaticMesh(ERoadIntersectionItem Item, UStaticMesh *StaticMesh)
+{
+  if (static_cast<uint8>(Item) < StaticMeshes.Num()) {
+    StaticMeshes[Item] = StaticMesh;
+  }
+}
+
+void ARoadIntersection::UpdateMeshes()
+{
+  check(StaticMeshes.Num() == StaticMeshComponents.Num());
+  int32 i = 0;
+  for (auto Item : StaticMeshes) {
+    check(StaticMeshComponents[i] != nullptr);
+    StaticMeshComponents[i]->SetStaticMesh(Item.Value);
+    ++i;
+  }
+}

Source/Carla/RoadIntersection.h

@@ -0,0 +1,49 @@
+// CARLA, Copyright (C) 2017 Computer Vision Center (CVC)
+
+#pragma once
+
+#include "GameFramework/Actor.h"
+#include "Components/StaticMeshComponent.h"
+#include "RoadIntersection.generated.h"
+
+UENUM(BlueprintType)
+enum class ERoadIntersectionItem : uint8
+{
+  Lane0           UMETA(DisplayName = "Lane 1"),
+  Lane1           UMETA(DisplayName = "Lane 2"),
+  Lane2           UMETA(DisplayName = "Lane 3"),
+  Lane3           UMETA(DisplayName = "Lane 4"),
+  Sidewalk0       UMETA(DisplayName = "Sidewalk 1"),
+  Sidewalk1       UMETA(DisplayName = "Sidewalk 2"),
+  Sidewalk2       UMETA(DisplayName = "Sidewalk 3"),
+  Sidewalk3       UMETA(DisplayName = "Sidewalk 4"),
+  LaneMarking     UMETA(DisplayName = "LaneMarking"),
+};
+
+/// A road intersection.
+UCLASS()
+class CARLA_API ARoadIntersection : public AActor
+{
+  GENERATED_BODY()
+
+public:
+
+  ARoadIntersection(const FObjectInitializer& ObjectInitializer);
+
+#if WITH_EDITOR
+  virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
+#endif // WITH_EDITOR
+
+  UFUNCTION(BlueprintCallable)
+  void SetStaticMesh(ERoadIntersectionItem Item, UStaticMesh *StaticMesh);
+
+private:
+
+  void UpdateMeshes();
+
+  UPROPERTY()
+  TArray<UStaticMeshComponent *> StaticMeshComponents;
+
+  UPROPERTY(Category = "Meshes", EditAnywhere)
+  TMap<ERoadIntersectionItem, UStaticMesh *> StaticMeshes;
+};