Add Ground Zero foliage pass

2026-05-14 06:41:23 -07:00
parent 7a05e324a3
commit 7ffe3ec978
7 changed files with 397 additions and 4 deletions
@@ -0,0 +1,94 @@
+// Copyright Pacificao. All Rights Reserved.
+
+#include "AgrarianFoliagePatch.h"
+
+#include "Components/HierarchicalInstancedStaticMeshComponent.h"
+#include "Components/SceneComponent.h"
+
+namespace
+{
+void ConfigureFoliageComponent(UHierarchicalInstancedStaticMeshComponent* Component, const FName CollisionProfileName)
+{
+	if (!Component)
+	{
+		return;
+	}
+
+	Component->SetMobility(EComponentMobility::Static);
+	Component->SetCollisionProfileName(CollisionProfileName);
+	Component->SetGenerateOverlapEvents(false);
+	Component->bCastDynamicShadow = true;
+	Component->bCastStaticShadow = true;
+	Component->InstanceStartCullDistance = 120000;
+	Component->InstanceEndCullDistance = 180000;
+}
+}
+
+AAgrarianFoliagePatch::AAgrarianFoliagePatch()
+{
+	PrimaryActorTick.bCanEverTick = false;
+
+	SceneRoot = CreateDefaultSubobject<USceneComponent>(TEXT("SceneRoot"));
+	RootComponent = SceneRoot;
+	SceneRoot->SetMobility(EComponentMobility::Static);
+
+	TreeInstances = CreateDefaultSubobject<UHierarchicalInstancedStaticMeshComponent>(TEXT("TreeInstances"));
+	TreeInstances->SetupAttachment(SceneRoot);
+	ConfigureFoliageComponent(TreeInstances, TEXT("BlockAll"));
+
+	ShrubInstances = CreateDefaultSubobject<UHierarchicalInstancedStaticMeshComponent>(TEXT("ShrubInstances"));
+	ShrubInstances->SetupAttachment(SceneRoot);
+	ConfigureFoliageComponent(ShrubInstances, TEXT("NoCollision"));
+
+	GrassInstances = CreateDefaultSubobject<UHierarchicalInstancedStaticMeshComponent>(TEXT("GrassInstances"));
+	GrassInstances->SetupAttachment(SceneRoot);
+	ConfigureFoliageComponent(GrassInstances, TEXT("NoCollision"));
+}
+
+void AAgrarianFoliagePatch::ClearFoliage()
+{
+	if (TreeInstances)
+	{
+		TreeInstances->ClearInstances();
+	}
+
+	if (ShrubInstances)
+	{
+		ShrubInstances->ClearInstances();
+	}
+
+	if (GrassInstances)
+	{
+		GrassInstances->ClearInstances();
+	}
+}
+
+int32 AAgrarianFoliagePatch::AddTreeInstance(const FTransform& InstanceTransform)
+{
+	return TreeInstances ? TreeInstances->AddInstance(InstanceTransform, true) : INDEX_NONE;
+}
+
+int32 AAgrarianFoliagePatch::AddShrubInstance(const FTransform& InstanceTransform)
+{
+	return ShrubInstances ? ShrubInstances->AddInstance(InstanceTransform, true) : INDEX_NONE;
+}
+
+int32 AAgrarianFoliagePatch::AddGrassInstance(const FTransform& InstanceTransform)
+{
+	return GrassInstances ? GrassInstances->AddInstance(InstanceTransform, true) : INDEX_NONE;
+}
+
+int32 AAgrarianFoliagePatch::GetTreeInstanceCount() const
+{
+	return TreeInstances ? TreeInstances->GetInstanceCount() : 0;
+}
+
+int32 AAgrarianFoliagePatch::GetShrubInstanceCount() const
+{
+	return ShrubInstances ? ShrubInstances->GetInstanceCount() : 0;
+}
+
+int32 AAgrarianFoliagePatch::GetGrassInstanceCount() const
+{
+	return GrassInstances ? GrassInstances->GetInstanceCount() : 0;
+}
@@ -0,0 +1,52 @@
+// Copyright Pacificao. All Rights Reserved.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "GameFramework/Actor.h"
+#include "AgrarianFoliagePatch.generated.h"
+
+class UHierarchicalInstancedStaticMeshComponent;
+class USceneComponent;
+
+UCLASS(Blueprintable)
+class AGRARIANGAME_API AAgrarianFoliagePatch : public AActor
+{
+	GENERATED_BODY()
+
+public:
+	AAgrarianFoliagePatch();
+
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Agrarian|Foliage")
+	TObjectPtr<USceneComponent> SceneRoot;
+
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Agrarian|Foliage")
+	TObjectPtr<UHierarchicalInstancedStaticMeshComponent> TreeInstances;
+
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Agrarian|Foliage")
+	TObjectPtr<UHierarchicalInstancedStaticMeshComponent> ShrubInstances;
+
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Agrarian|Foliage")
+	TObjectPtr<UHierarchicalInstancedStaticMeshComponent> GrassInstances;
+
+	UFUNCTION(BlueprintCallable, Category = "Agrarian|Foliage")
+	void ClearFoliage();
+
+	UFUNCTION(BlueprintCallable, Category = "Agrarian|Foliage")
+	int32 AddTreeInstance(const FTransform& InstanceTransform);
+
+	UFUNCTION(BlueprintCallable, Category = "Agrarian|Foliage")
+	int32 AddShrubInstance(const FTransform& InstanceTransform);
+
+	UFUNCTION(BlueprintCallable, Category = "Agrarian|Foliage")
+	int32 AddGrassInstance(const FTransform& InstanceTransform);
+
+	UFUNCTION(BlueprintPure, Category = "Agrarian|Foliage")
+	int32 GetTreeInstanceCount() const;
+
+	UFUNCTION(BlueprintPure, Category = "Agrarian|Foliage")
+	int32 GetShrubInstanceCount() const;
+
+	UFUNCTION(BlueprintPure, Category = "Agrarian|Foliage")
+	int32 GetGrassInstanceCount() const;
+};