#31 Add basic dynamic weather subclass

Source/Carla/DynamicWeather.cpp

@@ -0,0 +1,83 @@
+// CARLA, Copyright (C) 2017 Computer Vision Center (CVC)
+
+#include "Carla.h"
+#include "DynamicWeather.h"
+
+#include "Components/ArrowComponent.h"
+
+ADynamicWeather::ADynamicWeather(const FObjectInitializer& ObjectInitializer)
+{
+  PrimaryActorTick.bCanEverTick = false;
+
+  RootComponent = ObjectInitializer.CreateDefaultSubobject<USceneComponent>(this, TEXT("SceneComponent0"));
+
+#if WITH_EDITORONLY_DATA
+  ArrowComponent = CreateEditorOnlyDefaultSubobject<UArrowComponent>(TEXT("ArrowComponent0"));
+  if (ArrowComponent) {
+    ArrowComponent->ArrowColor = FColor(150, 200, 255);
+    ArrowComponent->bTreatAsASprite = true;
+    ArrowComponent->SpriteInfo.Category = TEXT("Lighting");
+    ArrowComponent->SpriteInfo.DisplayName = NSLOCTEXT( "SpriteCategory", "Lighting", "Lighting" );
+    ArrowComponent->SetupAttachment(RootComponent);
+    ArrowComponent->bLightAttachment = true;
+    ArrowComponent->bIsScreenSizeScaled = true;
+  }
+#endif // WITH_EDITORONLY_DATA
+}
+
+void ADynamicWeather::OnConstruction(const FTransform &Transform)
+{
+  Super::OnConstruction(Transform);
+  Update();
+}
+
+#if WITH_EDITOR
+
+void ADynamicWeather::PostEditChangeProperty(FPropertyChangedEvent &Event)
+{
+  Super::PostEditChangeProperty(Event);
+  const FName PropertyName = (Event.Property != NULL ? Event.Property->GetFName() : NAME_None);
+  if (PropertyName == GET_MEMBER_NAME_CHECKED(ADynamicWeather, Weather)) {
+    Update();
+  } else {
+    AdjustSunPositionBasedOnActorRotation();
+  }
+}
+
+void ADynamicWeather::EditorApplyRotation(
+    const FRotator &DeltaRotation,
+    bool bAltDown,
+    bool bShiftDown,
+    bool bCtrlDown)
+{
+  Super::EditorApplyRotation(DeltaRotation, bAltDown, bShiftDown, bCtrlDown);
+  AdjustSunPositionBasedOnActorRotation();
+}
+
+#endif // WITH_EDITOR
+
+FVector ADynamicWeather::GetSunDirection() const
+{
+  const FVector2D SphericalCoords(
+      FMath::DegreesToRadians(Weather.SunPolarAngle),
+      FMath::DegreesToRadians(Weather.SunAzimuthAngle));
+  return - SphericalCoords.SphericalToUnitCartesian();
+}
+
+void ADynamicWeather::Update()
+{
+  // Modify this actor's rotation according to Sun position.
+  if (!SetActorRotation(FQuat(GetSunDirection().Rotation()), ETeleportType::None)) {
+    UE_LOG(LogCarla, Warning, TEXT("Unable to rotate actor"));
+  }
+
+  RefreshWeather();
+}
+
+void ADynamicWeather::AdjustSunPositionBasedOnActorRotation()
+{
+  const FVector Direction = - GetActorQuat().GetForwardVector();
+  const FVector2D SphericalCoords = Direction.UnitCartesianToSpherical();
+  Weather.SunPolarAngle = FMath::RadiansToDegrees(SphericalCoords.X);
+  Weather.SunAzimuthAngle = FMath::RadiansToDegrees(SphericalCoords.Y);
+}

Source/Carla/DynamicWeather.h

@@ -0,0 +1,60 @@
+// CARLA, Copyright (C) 2017 Computer Vision Center (CVC)
+
+#pragma once
+
+#include "GameFramework/Actor.h"
+#include "WeatherDescription.h"
+#include "DynamicWeather.generated.h"
+
+class UArrowComponent;
+
+UCLASS(Abstract)
+class CARLA_API ADynamicWeather : public AActor
+{
+  GENERATED_BODY()
+
+public:
+
+  ADynamicWeather(const FObjectInitializer& ObjectInitializer);
+
+  virtual void OnConstruction(const FTransform &Transform) override;
+
+#if WITH_EDITOR
+
+  virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
+
+  virtual void EditorApplyRotation(const FRotator & DeltaRotation, bool bAltDown, bool bShiftDown, bool bCtrlDown) override;
+
+#endif // WITH_EDITOR
+
+  void SetWeatherDescription(const FWeatherDescription &WeatherDescription)
+  {
+    Weather = WeatherDescription;
+  }
+
+  UFUNCTION(BlueprintCallable)
+  const FWeatherDescription &GetWeatherDescription() const
+  {
+    return Weather;
+  }
+
+  UFUNCTION(BlueprintImplementableEvent)
+  void RefreshWeather();
+
+  UFUNCTION(BlueprintCallable)
+  FVector GetSunDirection() const;
+
+private:
+
+  void Update();
+
+  void AdjustSunPositionBasedOnActorRotation();
+
+#if WITH_EDITORONLY_DATA
+  UPROPERTY()
+  UArrowComponent* ArrowComponent;
+#endif // WITH_EDITORONLY_DATA
+
+  UPROPERTY(Category = "Weather", EditAnywhere)
+  FWeatherDescription Weather;
+};

Source/Carla/WeatherDescription.h

@@ -0,0 +1,118 @@
+// CARLA, Copyright (C) 2017 Computer Vision Center (CVC)
+
+#pragma once
+
+#include "WeatherDescription.generated.h"
+
+UENUM(BlueprintType)
+enum class EPrecipitationType : uint8
+{
+  Rain                  UMETA(DisplayName = "Rain"),
+};
+
+USTRUCT(BlueprintType)
+struct FWeatherDescription
+{
+  GENERATED_USTRUCT_BODY()
+
+  // ===========================================================================
+  /// @name Weather
+  // ===========================================================================
+  /// @{
+
+  /** Display name of the current weather. */
+  UPROPERTY(Category = "Weather", EditAnywhere, BlueprintReadWrite)
+  FString Name;
+
+  /// @}
+  // ===========================================================================
+  /// @name Weather - Sun
+  // ===========================================================================
+  /// @{
+
+  /** Polar angle of the Sun in degrees, with 0.0 at zenith, 90.0 at equator. */
+  UPROPERTY(Category = "Weather|Sun", EditAnywhere, BlueprintReadWrite, meta = (ClampMin = "0.0", ClampMax = "180.0"))
+  float SunPolarAngle = 45.0f;
+
+  /** Azimuth angle of the Sun in degrees. */
+  UPROPERTY(Category = "Weather|Sun", EditAnywhere, BlueprintReadWrite, meta = (ClampMin = "-180.0", ClampMax = "180.0"))
+  float SunAzimuthAngle = 0.0f;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sun", EditAnywhere, BlueprintReadWrite, meta=(ClampMin = "0.0", ClampMax = "100.0"))
+  float SunBrightness;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sun", EditAnywhere, BlueprintReadWrite, meta=(ClampMin = "0.0", ClampMax = "100.0"))
+  float SunDirectionalLightIntensity;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sun", EditAnywhere, BlueprintReadWrite)
+  FLinearColor SunDirectionalLightColor;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sun", EditAnywhere, BlueprintReadWrite, meta=(ClampMin = "0.0", ClampMax = "100.0"))
+  float SunIndirectLightIntensity;
+
+  /// @}
+  // ===========================================================================
+  /// @name Weather - Sky
+  // ===========================================================================
+  /// @{
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sky", EditAnywhere, BlueprintReadWrite, meta=(ClampMin = "0.0", ClampMax = "100.0"))
+  float CloudOpacity;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sky", EditAnywhere, BlueprintReadWrite, meta=(ClampMin = "0.0", ClampMax = "100.0"))
+  float HorizontFalloff;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sky", EditAnywhere, BlueprintReadWrite)
+  FLinearColor ZenithColor;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sky", EditAnywhere, BlueprintReadWrite)
+  FLinearColor HorizonColor;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sky", EditAnywhere, BlueprintReadWrite)
+  FLinearColor CloudColor;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sky", EditAnywhere, BlueprintReadWrite)
+  FLinearColor OverallSkyColor;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sky", EditAnywhere, BlueprintReadWrite, meta=(ClampMin = "0.0", ClampMax = "100.0"))
+  float SkyLightIntensity;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Sky", EditAnywhere, BlueprintReadWrite)
+  FLinearColor SkyLightColor;
+
+  /// @}
+  // ===========================================================================
+  /// @name Weather - Precipitation
+  // ===========================================================================
+  /// @{
+
+  /**  */
+  UPROPERTY(Category = "Weather|Precipitation", EditAnywhere, BlueprintReadWrite)
+  bool bPrecipitation = false;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Precipitation", EditAnywhere, BlueprintReadWrite, meta=(EditCondition="bPrecipitation"))
+  EPrecipitationType PrecipitationType = EPrecipitationType::Rain;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Precipitation", EditAnywhere, BlueprintReadWrite, meta=(EditCondition="bPrecipitation", ClampMin = "0.0", ClampMax = "100.0"))
+  float PrecipitationAmount = 0.0f;
+
+  /**  */
+  UPROPERTY(Category = "Weather|Precipitation", EditAnywhere, BlueprintReadWrite, meta=(EditCondition="bPrecipitation", ClampMin = "0.0", ClampMax = "100.0"))
+  float PrecipitationAccumulation = 0.0f;
+
+  /// @}
+};