Reculate flatten spline regulary

Pawn_Unreal/Source/Pawn/Private/Characters/PwnCharacterMovementComponent.cpp

@@ -86,7 +86,7 @@ void UPwnCharacterMovementComponent::EnterSplineFollowMode() {
 	IsFollowingSpline = true;
 	SetMovementMode(MOVE_Custom, SplineWalking);
 
-	UpdateCurrentCombatPath(true);
+	UpdateCurrentCombatPath(true, true);
 }
 
 void UPwnCharacterMovementComponent::ExitSplineFollowMode() {
@@ -99,25 +99,35 @@ bool UPwnCharacterMovementComponent::IsCustomMovementMode(const ECustomMovementM
 	return MovementMode == MOVE_Custom && CustomMovementMode == Mode;
 }
 
-bool UPwnCharacterMovementComponent::LineTraceToGround(FHitResult& OutHit, const FVector& StartLocation) const {
+bool UPwnCharacterMovementComponent::LineTraceToGround(FHitResult& OutHit, const FVector& StartLocation, const FLinearColor& DebugColor) const {
 	const FVector EndLocation = StartLocation + FVector(0.0f, 0.0f, -LineTraceDistance);
 	return UKismetSystemLibrary::LineTraceSingle(this, StartLocation, EndLocation, UEngineTypes::ConvertToTraceType(ECC_Visibility), false, TArray<AActor*>(),
-	                                      EDrawDebugTrace::None, OutHit, true, FLinearColor::Red, FLinearColor::Green, 0.5f);
+	                                      DebugColor == FLinearColor::White ? EDrawDebugTrace::None : EDrawDebugTrace::ForDuration, OutHit, true, DebugColor, FLinearColor::Green, 0.5f);
 }
-
-void UPwnCharacterMovementComponent::UpdateCurrentCombatPath(const bool UpdateLocation) {
+float AccumulatedTimer = 0.0f;
+void UPwnCharacterMovementComponent::UpdateCurrentCombatPath(const bool Force, const bool UpdateLocation) {
+	AccumulatedTimer += GetWorld()->GetDeltaSeconds();
+	if (AccumulatedTimer < 0.3f && !Force) {
+		return;
+	}
+	AccumulatedTimer = 0.0f;
 	APwnCombatPlatformerPath* OutCombatPath;
 	FHitResult Hit;
-	if (LineTraceToGround(Hit, UpdatedComponent->GetComponentLocation())
+	float ClosestInputKey = -1.0f;
+	if (LineTraceToGround(Hit, UpdatedComponent->GetComponentLocation(), FLinearColor::Red)) {
+		UE_LOG(LogTemp, Log, TEXT("Hit location : %s"), *Hit.ImpactPoint.ToString());
+	}
+	
+	if (LineTraceToGround(Hit, UpdatedComponent->GetComponentLocation(), FLinearColor::Red)
 		&& UPwnGameplayModeSubsystem::Get(this).FindClosestCombatPathLocation(Hit.ImpactPoint, OutCombatPath)
 		&& OutCombatPath != CombatPath) {
 		CombatPath = OutCombatPath;
 		DotDirection = CombatPath->Reversed ? -1.0f : 1.0f;
 
-		const float ClosestInputKey = CombatPath->Spline->FindInputKeyClosestToWorldLocation(UpdatedComponent->GetComponentLocation());
+		ClosestInputKey = CombatPath->Spline->FindInputKeyClosestToWorldLocation(UpdatedComponent->GetComponentLocation());
 		const FVector ClosestLocation = CombatPath->Spline->GetLocationAtSplineInputKey(ClosestInputKey, ESplineCoordinateSpace::World);
 
-		if (LineTraceToGround(Hit, ClosestLocation)) {
+		if (LineTraceToGround(Hit, ClosestLocation, FLinearColor::Blue)) {
 			const float SplineKey = CombatPath->FlattenedSpline->FindInputKeyClosestToWorldLocation(Hit.ImpactPoint);
 			DistanceAlongSpline = CombatPath->FlattenedSpline->GetDistanceAlongSplineAtSplineInputKey(SplineKey);
 
@@ -128,6 +138,14 @@ void UPwnCharacterMovementComponent::UpdateCurrentCombatPath(const bool UpdateLo
 			}
 		}
 	}
+
+	check(CombatPath);
+
+	// If the combat path was the same as before, the closest input key will has not been computed
+	if (ClosestInputKey < 0.0f) {
+		ClosestInputKey = CombatPath->Spline->FindInputKeyClosestToWorldLocation(UpdatedComponent->GetComponentLocation());
+	}
+	CombatPath->UpdateFlattenSpline(ClosestInputKey);
 }
 
 void UPwnCharacterMovementComponent::UpdateTangentAndAcceleration() {
@@ -163,7 +181,7 @@ void UPwnCharacterMovementComponent::UpdatePawnVelocity(const float TimeTick) {
 
 void UPwnCharacterMovementComponent::UpdateDistanceAlongSpline() {
 	FHitResult Hit;
-	if (LineTraceToGround(Hit, UpdatedComponent->GetComponentLocation())) {
+	if (LineTraceToGround(Hit, UpdatedComponent->GetComponentLocation(), FLinearColor::White)) {
 		const FVector ImpactPoint = Hit.ImpactPoint;
 		const float InputKey = CombatPath->FlattenedSpline->FindInputKeyClosestToWorldLocation(ImpactPoint);
 		DistanceAlongSpline = CombatPath->FlattenedSpline->GetDistanceAlongSplineAtSplineInputKey(InputKey);
@@ -378,7 +396,7 @@ void UPwnCharacterMovementComponent::PhysSplineWalking(const float DeltaTime, in
 
 	/* -- PAWN MODIFICATIONS -- */
 	UpdateDistanceAlongSpline();
-	UpdateLocationOnFlattenedSpline();
+	//UpdateLocationOnFlattenedSpline();
 }
 
 void UPwnCharacterMovementComponent::PhysSplineFalling(const float DeltaTime, int32 Iterations) {

Pawn_Unreal/Source/Pawn/Private/GameplayModes/Combat/PwnCombatPlatformerPath.cpp

@@ -3,6 +3,8 @@
 #include "Components/SplineComponent.h"
 #include "GameplayModes/PwnGameplayModeSubsystem.h"
 
+constexpr int FlattenSplinePadding = 2;
+
 APwnCombatPlatformerPath::APwnCombatPlatformerPath() {
 	PrimaryActorTick.bCanEverTick = false;
 
@@ -16,21 +18,26 @@ APwnCombatPlatformerPath::APwnCombatPlatformerPath() {
 #endif
 }
 
-void APwnCombatPlatformerPath::BeginPlay() {
-	UPwnGameplayModeSubsystem* Subsystem = GetWorld()->GetSubsystem<UPwnGameplayModeSubsystem>();
-	check(Subsystem);
-	Subsystem->RegisterCombatPath(this);
+void APwnCombatPlatformerPath::UpdateFlattenSpline(const float InputKey) {
+	const int32 SplinePointCounts = Spline->GetNumberOfSplinePoints();
+	const int32 NewMinKey = FMath::Clamp(FMath::CeilToInt(InputKey) - FlattenSplinePadding, 0, SplinePointCounts - 1);
+	const int32 NewMaxKey = FMath::Clamp(FMath::FloorToInt(InputKey) + FlattenSplinePadding, 0, SplinePointCounts - 1);
+
+	if (NewMinKey == MinKey && NewMaxKey == MaxKey) {
+		// Already up to date
+		return;
+	}
+
+	MinKey = NewMinKey;
+	MaxKey = NewMaxKey;
 
-	FlattenedSpline = NewObject<USplineComponent>(this, TEXT("FlattenedSpline"));
-	FlattenedSpline->SetClosedLoop(Spline->IsClosedLoop(), false);
-	FlattenedSpline->ReparamStepsPerSegment = Spline->ReparamStepsPerSegment;
 	FlattenedSpline->ClearSplinePoints(false);
 
-	const FVector FirstPointLocation = Spline->GetLocationAtSplinePoint(0, ESplineCoordinateSpace::World);
+	const FVector FirstPointLocation = Spline->GetLocationAtSplinePoint(MinKey, ESplineCoordinateSpace::World);
 	const float FirstPointZ = FirstPointLocation.Z;
 
-	const int32 PointsCount = Spline->GetNumberOfSplinePoints();
-	for (int i = 0; i < PointsCount; ++i) {
+	int32 PointIndex = 0;
+	for (int i = MinKey; i <= MaxKey; ++i, ++PointIndex) {
 		FVector NewLocation = Spline->GetLocationAtSplinePoint(i, ESplineCoordinateSpace::World);
 		NewLocation.Z = FirstPointZ;
 		FlattenedSpline->AddSplinePoint(NewLocation, ESplineCoordinateSpace::World, false);
@@ -40,10 +47,22 @@ void APwnCombatPlatformerPath::BeginPlay() {
 
 		ArriveTangent.Z = 0;
 		LeaveTangent.Z = 0;
-		FlattenedSpline->SetTangentsAtSplinePoint(i, ArriveTangent, LeaveTangent, ESplineCoordinateSpace::World, false);
+		FlattenedSpline->SetTangentsAtSplinePoint(PointIndex, ArriveTangent, LeaveTangent, ESplineCoordinateSpace::World, false);
 	}
 
 	FlattenedSpline->UpdateSpline();
+}
+
+void APwnCombatPlatformerPath::BeginPlay() {
+	UPwnGameplayModeSubsystem* Subsystem = GetWorld()->GetSubsystem<UPwnGameplayModeSubsystem>();
+	check(Subsystem);
+	Subsystem->RegisterCombatPath(this);
+
+	FlattenedSpline = NewObject<USplineComponent>(this, TEXT("FlattenedSpline"));
+	FlattenedSpline->SetClosedLoop(Spline->IsClosedLoop(), false);
+	FlattenedSpline->ReparamStepsPerSegment = Spline->ReparamStepsPerSegment;
+
+	UpdateFlattenSpline(0.0f);
 
 	Super::BeginPlay();
 }

Pawn_Unreal/Source/Pawn/Private/GameplayModes/PwnGameplayModeSubsystem.cpp

@@ -2,6 +2,7 @@
 
 #include "Components/SplineComponent.h"
 #include "GameplayModes/Combat/PwnCombatPlatformerPath.h"
+#include "Utils/EngineUtils.h"
 
 UPwnGameplayModeSubsystem& UPwnGameplayModeSubsystem::Get(const UObject* WorldContextObject) {
 	const UWorld* World = GEngine->GetWorldFromContextObjectChecked(WorldContextObject);
@@ -57,16 +58,21 @@ bool UPwnGameplayModeSubsystem::FindClosestCombatPathLocation(const FVector& Loc
 
 		const float CurrentKey = CurrentSpline->FindInputKeyClosestToWorldLocation(Location);
 		FVector CurrentLocation = CurrentSpline->GetLocationAtSplineInputKey(CurrentKey, ESplineCoordinateSpace::World);
+		if (CurrentLocation.Z < Location.Z) {
+			continue;
+		}
 		const float CurrentDistance = FVector::DistSquared(Location, CurrentLocation);
-		if (CurrentDistance < ShortestDistance) {
+		if (CurrentDistance >= ShortestDistance) {
+			continue;
+		}
 		ShortestDistance = CurrentDistance;
 		ClosestCombatPath = CombatPath;
 	}
-	}
 
 	if (ClosestCombatPath != nullptr) {
 		OutCombatPath = ClosestCombatPath;
 		return true;
 	}
+	PRINT_STRING_RED("Aie");
 	return false;
 }

Pawn_Unreal/Source/Pawn/Public/Characters/PwnCharacterMovementComponent.h

@@ -51,9 +51,9 @@ public:
 	bool IsCustomMovementMode(const ECustomMovementMode Mode) const;
 
 private:
-	bool LineTraceToGround(FHitResult& OutHit, const FVector& StartLocation) const;
+	bool LineTraceToGround(FHitResult& OutHit, const FVector& StartLocation, const FLinearColor& DebugColor) const;
 	
-	void UpdateCurrentCombatPath(const bool UpdateLocation = false);
+	void UpdateCurrentCombatPath(bool Force = false, const bool UpdateLocation = false);
 
 	/**
 	 * Updates the tangent in function of the current distance along the spline. Then updates the acceleration so it will simulate an input in the

Pawn_Unreal/Source/Pawn/Public/GameplayModes/Combat/PwnCombatPlatformerPath.h

@@ -13,6 +13,8 @@ class PAWN_API APwnCombatPlatformerPath : public AActor {
 public:
 	APwnCombatPlatformerPath();
 
+	void UpdateFlattenSpline(const float InputKey);
+
 protected:
 	virtual void BeginPlay() override;
 
@@ -30,4 +32,10 @@ public:
 
 	UPROPERTY(Transient, BlueprintReadOnly)
 	TObjectPtr<USplineComponent> FlattenedSpline;
+
+	UPROPERTY()
+	int32 MinKey;
+
+	UPROPERTY()
+	int32 MaxKey;
 };