78 - Shell Physics

Source/Blaster/Weapon/Casing.cpp

@@ -3,18 +3,42 @@
 
 #include "Casing.h"
 
+#include "Kismet/GameplayStatics.h"
+#include "Sound/SoundCue.h"
+
 ACasing::ACasing()
 {
 	PrimaryActorTick.bCanEverTick = false;
 
+	ShellEjectionImpulseMin = 8.f;
+	ShellEjectionImpulseMax = 12.f;
 	CasingMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("CasingMesh"));
+	CasingMesh->SetCollisionResponseToChannel(ECC_Camera, ECR_Ignore);
+	CasingMesh->SetSimulatePhysics(true);
+	CasingMesh->SetEnableGravity(true);
+	CasingMesh->SetNotifyRigidBodyCollision(true);
 	SetRootComponent(CasingMesh);
 }
 
 void ACasing::BeginPlay()
 {
 	Super::BeginPlay();
-	
+
+	CasingMesh->OnComponentHit.AddDynamic(this, &ACasing::OnHit);
+	CasingMesh->AddImpulse(GetActorForwardVector() * FMath::RandRange(ShellEjectionImpulseMin, ShellEjectionImpulseMax));
+
+	SetLifeSpan(5.f);
+}
+
+void ACasing::OnHit(UPrimitiveComponent* HitComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, FVector NormalImpulse, const FHitResult& Hit)
+{
+	if (ShellSound)
+	{
+		UGameplayStatics::PlaySoundAtLocation(this, ShellSound, GetActorLocation());
+	}
+
+	// Disable hit event so that sound won't play multiple times
+	CasingMesh->SetNotifyRigidBodyCollision(false);
 }
 
 

Source/Blaster/Weapon/Casing.h

@@ -16,9 +16,21 @@ public:
 
 protected:
 	virtual void BeginPlay() override;
+	UFUNCTION()
+	virtual void OnHit(UPrimitiveComponent* HitComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, FVector NormalImpulse, const FHitResult& Hit);
+
 
 private:
 
 	UPROPERTY(VisibleAnywhere)
 	UStaticMeshComponent* CasingMesh;
+
+	UPROPERTY(EditAnywhere)
+	float ShellEjectionImpulseMin;
+	
+	UPROPERTY(EditAnywhere)
+	float ShellEjectionImpulseMax;
+
+	UPROPERTY(EditAnywhere)
+	class USoundCue* ShellSound;
 };