door opens!!!

RoomEscape/Source/RoomEscape/OpenDoor.cpp

@@ -2,8 +2,11 @@
 
 #include "OpenDoor.h"
 #include "Engine/World.h"
+#include "Components/PrimitiveComponent.h"
 #include "GameFramework/Actor.h" // See auto completes
 
+#define OUT
+
 
 // Sets default values for this component's properties
 UOpenDoor::UOpenDoor()
@@ -21,17 +24,37 @@ void UOpenDoor::BeginPlay()
 	Super::BeginPlay();
 	OwningDoor = GetOwner();
 
-	ActorThatOpens = GetWorld()->GetFirstPlayerController()->GetPawn();
+}
+
+//Returns total mass in Kg
+float UOpenDoor::GetTotalMassOfActorsOnPlate()
+{
+	float TotalMass = 0.0f;
+
+	TArray<AActor*> OverlappingActors;
+
+	//Find all overlapping actors.
+	PressurePlate->GetOverlappingActors(
+		OUT OverlappingActors
+	);
+	//iterate through finding masses.
+	for (const auto *Actor : OverlappingActors) {
+		UPrimitiveComponent *Component = Actor->FindComponentByClass<UPrimitiveComponent>();
+		TotalMass += Component->GetMass();
+
+		UE_LOG(LogTemp, Warning, TEXT("MASS %s"), *Actor->GetName());
+	}
+
+
+	return TotalMass;
 }
 
 
 void UOpenDoor::OpenDoor() {
-	FString Rot = OwningDoor->GetTransform().GetRotation().GetAxisZ().ToString();
 	OwningDoor->SetActorRotation(FRotator(0.0f, OpenAngle, 0.0f));
 }
 
 void UOpenDoor::CloseDoor() {
-	FString Rot = OwningDoor->GetTransform().GetRotation().GetAxisZ().ToString();
 	OwningDoor->SetActorRotation(FRotator(0.0f, 0.0f, 0.0f));
 }
 
@@ -42,7 +65,7 @@ void UOpenDoor::TickComponent(float DeltaTime, ELevelTick TickType, FActorCompon
 	float CurSeconds = GetWorld()->GetTimeSeconds();
 	// poll the TriggerVolume every frame
 	// if ActorThatOpens  is in the volume, open door
-	if (PressurePlate->IsOverlappingActor(ActorThatOpens)) {
+	if (GetTotalMassOfActorsOnPlate() > TriggerMass) {
 		OpenDoor();
 		LastDoorOpenTime = CurSeconds;
 	}

RoomEscape/Source/RoomEscape/OpenDoor.h

@@ -29,6 +29,9 @@ private:
 	UPROPERTY(EditAnywhere)
 		float OpenAngle = -90.f;
 
+	UPROPERTY(EditAnywhere)
+		float TriggerMass = 50.f;
+
 	UPROPERTY(EditAnywhere)
 		ATriggerVolume* PressurePlate;
 
@@ -37,8 +40,9 @@ private:
 
 	float LastDoorOpenTime;
 	
-	AActor* ActorThatOpens;
 	AActor* OwningDoor;
 
+	float GetTotalMassOfActorsOnPlate();
+
 
 };