From ea0b5d8c2835ee48e95c1a7095e0675b287b0e58 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luk=C3=A1=C5=A1=20Hejtm=C3=A1nek?= <hejtmy@gmail.com>
Date: Sat, 20 Nov 2021 04:03:27 +0100
Subject: [PATCH] Adds landscape hack

---
 .../Private/LFLandscapeGrassHack.cpp          | 30 ++++++++++++++++++
 Source/lidarforest/Private/MyActor.cpp        | 27 ++++++++++++++++
 .../lidarforest/Public/LFLandscapeGrassHack.h | 31 +++++++++++++++++++
 Source/lidarforest/Public/MyActor.h           | 26 ++++++++++++++++
 Source/lidarforest/lidarforest.Build.cs       |  3 +-
 Source/lidarforest/lidarforest.cpp            |  1 +
 6 files changed, 117 insertions(+), 1 deletion(-)
 create mode 100644 Source/lidarforest/Private/LFLandscapeGrassHack.cpp
 create mode 100644 Source/lidarforest/Private/MyActor.cpp
 create mode 100644 Source/lidarforest/Public/LFLandscapeGrassHack.h
 create mode 100644 Source/lidarforest/Public/MyActor.h

diff --git a/Source/lidarforest/Private/LFLandscapeGrassHack.cpp b/Source/lidarforest/Private/LFLandscapeGrassHack.cpp
new file mode 100644
index 0000000..c4be8cd
--- /dev/null
+++ b/Source/lidarforest/Private/LFLandscapeGrassHack.cpp
@@ -0,0 +1,30 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+#include "LFLandscapeGrassHack.h"
+
+// Sets default values
+ALFLandscapeGrassHack::ALFLandscapeGrassHack()
+{
+ 	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
+	PrimaryActorTick.bCanEverTick = false;	
+	Root = CreateDefaultSubobject<USceneComponent>("Root");
+	RootComponent = Root;
+}
+
+// Called when the game starts or when spawned
+void ALFLandscapeGrassHack::BeginPlay()
+{
+	Super::BeginPlay();
+	UpdateGrass(Landscape);
+}
+
+void ALFLandscapeGrassHack::UpdateGrass(ALandscapeProxy* LandscapeToUpdate)
+{
+	if(!IsValid(LandscapeToUpdate))
+	{
+		UE_LOG(LogTemp, Warning, TEXT("NO landscape has been assigned, cannot recreate grass"));
+		return;
+	}
+	FOccluderVertexArray arr;
+	LandscapeToUpdate->UpdateGrass(arr, true);
+}
diff --git a/Source/lidarforest/Private/MyActor.cpp b/Source/lidarforest/Private/MyActor.cpp
new file mode 100644
index 0000000..30478b6
--- /dev/null
+++ b/Source/lidarforest/Private/MyActor.cpp
@@ -0,0 +1,27 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+
+#include "MyActor.h"
+
+// Sets default values
+AMyActor::AMyActor()
+{
+ 	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
+	PrimaryActorTick.bCanEverTick = true;
+	
+}
+
+// Called when the game starts or when spawned
+void AMyActor::BeginPlay()
+{
+	Super::BeginPlay();
+	
+}
+
+// Called every frame
+void AMyActor::Tick(float DeltaTime)
+{
+	Super::Tick(DeltaTime);
+
+}
+
diff --git a/Source/lidarforest/Public/LFLandscapeGrassHack.h b/Source/lidarforest/Public/LFLandscapeGrassHack.h
new file mode 100644
index 0000000..a9d6ddf
--- /dev/null
+++ b/Source/lidarforest/Public/LFLandscapeGrassHack.h
@@ -0,0 +1,31 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "LandscapeProxy.h"
+#include "GameFramework/Actor.h"
+#include "LFLandscapeGrassHack.generated.h"
+
+UCLASS()
+class LIDARFOREST_API ALFLandscapeGrassHack : public AActor
+{
+	GENERATED_BODY()
+	
+public:	
+	// Sets default values for this actor's properties
+	ALFLandscapeGrassHack();
+
+	UPROPERTY()
+	USceneComponent* Root;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
+	ALandscapeProxy* Landscape;
+
+protected:
+	// Called when the game starts or when spawned
+	virtual void BeginPlay() override;
+
+	void UpdateGrass(ALandscapeProxy* LandscapeToUpdate);
+
+};
diff --git a/Source/lidarforest/Public/MyActor.h b/Source/lidarforest/Public/MyActor.h
new file mode 100644
index 0000000..03dfcd7
--- /dev/null
+++ b/Source/lidarforest/Public/MyActor.h
@@ -0,0 +1,26 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "GameFramework/Actor.h"
+#include "MyActor.generated.h"
+
+UCLASS()
+class LIDARFOREST_API AMyActor : public AActor
+{
+	GENERATED_BODY()
+	
+public:	
+	// Sets default values for this actor's properties
+	AMyActor();
+
+protected:
+	// Called when the game starts or when spawned
+	virtual void BeginPlay() override;
+
+public:	
+	// Called every frame
+	virtual void Tick(float DeltaTime) override;
+
+};
diff --git a/Source/lidarforest/lidarforest.Build.cs b/Source/lidarforest/lidarforest.Build.cs
index 4380768..a56bf80 100644
--- a/Source/lidarforest/lidarforest.Build.cs
+++ b/Source/lidarforest/lidarforest.Build.cs
@@ -8,7 +8,8 @@ public class lidarforest : ModuleRules
 	{
 		PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
 	
-		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "ForestImporter"});
+		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", 
+			"Landscape"});
 
 		PrivateDependencyModuleNames.AddRange(new string[] {  });
 
diff --git a/Source/lidarforest/lidarforest.cpp b/Source/lidarforest/lidarforest.cpp
index 7689cc8..b2cb29f 100644
--- a/Source/lidarforest/lidarforest.cpp
+++ b/Source/lidarforest/lidarforest.cpp
@@ -4,3 +4,4 @@
 #include "Modules/ModuleManager.h"
 
 IMPLEMENT_PRIMARY_GAME_MODULE( FDefaultGameModuleImpl, lidarforest, "lidarforest" );
+