Method Prone

Source/ALSXT/Private/AlsxtCharacterMovementComponent.cpp:564–654

}

void UAlsxtCharacterMovementComponent::Prone(bool bClientSimulation)
{
	if (!HasValidData())
	{
		return;
	}

	if (!bClientSimulation && !CanCrouchInCurrentState())
	{
		return;
	}

	// See if collision is already at desired size.
	if (CharacterOwner->GetCapsuleComponent()->GetUnscaledCapsuleHalfHeight() == GetProneHalfHeight())
	{
		if (!bClientSimulation)
		{
			// CharacterOwner->SetIsProne(true);
		}
		CharacterOwner->OnStartCrouch( 0.f, 0.f );
		return;
	}

	if (bClientSimulation && CharacterOwner->GetLocalRole() == ROLE_SimulatedProxy)
	{
		// restore collision size before crouching
		ACharacter* DefaultCharacter = CharacterOwner->GetClass()->GetDefaultObject<ACharacter>();
		CharacterOwner->GetCapsuleComponent()->SetCapsuleSize(DefaultCharacter->GetCapsuleComponent()->GetUnscaledCapsuleRadius(), DefaultCharacter->GetCapsuleComponent()->GetUnscaledCapsuleHalfHeight());
		bShrinkProxyCapsule = true;
	}

	// Change collision size to prone dimensions
	const float ComponentScale = CharacterOwner->GetCapsuleComponent()->GetShapeScale();
	const float OldUnscaledHalfHeight = CharacterOwner->GetCapsuleComponent()->GetUnscaledCapsuleHalfHeight();
	const float OldUnscaledRadius = CharacterOwner->GetCapsuleComponent()->GetUnscaledCapsuleRadius();
	// Height is not allowed to be smaller than radius.
	const float ClampedProneHalfHeight = FMath::Max3(0.f, OldUnscaledRadius, GetProneHalfHeight());
	CharacterOwner->GetCapsuleComponent()->SetCapsuleSize(OldUnscaledRadius, ClampedProneHalfHeight);
	float HalfHeightAdjust = (OldUnscaledHalfHeight - ClampedProneHalfHeight);
	float ScaledHalfHeightAdjust = HalfHeightAdjust * ComponentScale;

	if( !bClientSimulation )
	{
		// Crouching to a larger height? (this is rare)
		if (ClampedProneHalfHeight > OldUnscaledHalfHeight)
		{
			FCollisionQueryParams CapsuleParams(SCENE_QUERY_STAT(CrouchTrace), false, CharacterOwner);
			FCollisionResponseParams ResponseParam;
			InitCollisionParams(CapsuleParams, ResponseParam);
			const bool bEncroached = GetWorld()->OverlapBlockingTestByChannel(UpdatedComponent->GetComponentLocation() + ScaledHalfHeightAdjust * GetGravityDirection(), GetWorldToGravityTransform(),
				UpdatedComponent->GetCollisionObjectType(), GetPawnCapsuleCollisionShape(SHRINK_None), CapsuleParams, ResponseParam);

			// If encroached, cancel
			if( bEncroached )
			{
				CharacterOwner->GetCapsuleComponent()->SetCapsuleSize(OldUnscaledRadius, OldUnscaledHalfHeight);
				return;
			}