void USCarryObjectComponent::OnDropMulticast_Implementation()
{
AActor* CarriedActor = GetCarriedActor();
if (CarriedActor)
{
/* Find the static mesh (if any) to re-enable physics simulation */
UStaticMeshComponent* MeshComp = Cast<UStaticMeshComponent>(CarriedActor->GetComponentByClass(UStaticMeshComponent::StaticClass()));
if (MeshComp)
{
MeshComp->SetCollisionEnabled(ECollisionEnabled::QueryAndPhysics);
MeshComp->SetSimulatePhysics(true);
}
CarriedActor->GetRootComponent()->DetachFromComponent(FDetachmentTransformRules::KeepWorldTransform);
}
}
void USCarryObjectComponent::OnPickupMulticast_Implementation(AActor* FocusActor)
{
if (FocusActor && FocusActor->IsRootComponentMovable())
{
/* Find the static mesh (if any) to disable physics simulation while carried
Filter by objects that are physically simulated and can therefor be picked up */
UStaticMeshComponent* MeshComp = Cast<UStaticMeshComponent>(FocusActor->GetComponentByClass(UStaticMeshComponent::StaticClass()));
if (MeshComp && MeshComp->IsSimulatingPhysics())
{
MeshComp->SetCollisionEnabled(ECollisionEnabled::QueryOnly);
MeshComp->SetSimulatePhysics(false);
}
FocusActor->AttachToComponent(this, FAttachmentTransformRules::KeepWorldTransform);
}
}
void ASCharacter::DropWeapon()
{
if (Role < ROLE_Authority)
{
ServerDropWeapon();
return;
}
if (CurrentWeapon)
{
FVector CamLoc;
FRotator CamRot;
if (Controller == nullptr)
return;
/* Find a location to drop the item, slightly in front of the player. */
Controller->GetPlayerViewPoint(CamLoc, CamRot);
const FVector Direction = CamRot.Vector();
const FVector SpawnLocation = GetActorLocation() + (Direction * DropItemDistance);
FActorSpawnParameters SpawnInfo;
SpawnInfo.bNoCollisionFail = true;
ASWeaponPickup* NewWeaponPickup = GetWorld()->SpawnActor<ASWeaponPickup>(CurrentWeapon->WeaponPickupClass, SpawnLocation, FRotator::ZeroRotator, SpawnInfo);
if (NewWeaponPickup)
{
/* Apply torque to make it spin when dropped. */
UStaticMeshComponent* MeshComp = NewWeaponPickup->GetMeshComponent();
if (MeshComp)
{
MeshComp->SetSimulatePhysics(true);
MeshComp->AddTorque(FVector(1, 1, 1) * 4000000);
}
}
RemoveWeapon(CurrentWeapon);
}
}
void ASCharacter::DropWeapon()
{
if (Role < ROLE_Authority)
{
ServerDropWeapon();
return;
}
if (CurrentWeapon)
{
FVector CamLoc;
FRotator CamRot;
if (Controller == nullptr)
{
return;
}
/* Find a location to drop the item, slightly in front of the player.
Perform ray trace to check for blocking objects or walls and to make sure we don't drop any item through the level mesh */
Controller->GetPlayerViewPoint(CamLoc, CamRot);
FVector SpawnLocation;
FRotator SpawnRotation = CamRot;
const FVector Direction = CamRot.Vector();
const FVector TraceStart = GetActorLocation();
const FVector TraceEnd = GetActorLocation() + (Direction * DropWeaponMaxDistance);
/* Setup the trace params, we are only interested in finding a valid drop position */
FCollisionQueryParams TraceParams;
TraceParams.bTraceComplex = false;
TraceParams.bReturnPhysicalMaterial = false;
TraceParams.AddIgnoredActor(this);
FHitResult Hit;
GetWorld()->LineTraceSingleByChannel(Hit, TraceStart, TraceEnd, ECC_WorldDynamic, TraceParams);
/* Find farthest valid spawn location */
if (Hit.bBlockingHit)
{
/* Slightly move away from impacted object */
SpawnLocation = Hit.ImpactPoint + (Hit.ImpactNormal * 20);
}
else
{
SpawnLocation = TraceEnd;
}
/* Spawn the "dropped" weapon */
FActorSpawnParameters SpawnInfo;
SpawnInfo.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AlwaysSpawn;
ASWeaponPickup* NewWeaponPickup = GetWorld()->SpawnActor<ASWeaponPickup>(CurrentWeapon->WeaponPickupClass, SpawnLocation, FRotator::ZeroRotator, SpawnInfo);
if (NewWeaponPickup)
{
/* Apply torque to make it spin when dropped. */
UStaticMeshComponent* MeshComp = NewWeaponPickup->GetMeshComponent();
if (MeshComp)
{
MeshComp->SetSimulatePhysics(true);
MeshComp->AddTorque(FVector(1, 1, 1) * 4000000);
}
}
RemoveWeapon(CurrentWeapon, true);
}
}