feat: initial commit, only bugs remaining

Source/UTAD_UI/SkillTree/CharacterStatsComponent.cpp

@@ -0,0 +1,192 @@
+#include "CharacterStatsComponent.h"
+#include "SkillTreeComponent.h"
+#include "GameFramework/Character.h"
+#include "GameFramework/CharacterMovementComponent.h"
+
+UCharacterStatsComponent::UCharacterStatsComponent()
+{
+    PrimaryComponentTick.bCanEverTick = false;
+
+    // Default base stats
+    BaseMaxHealth = 100.0f;
+    BaseDamage = 10.0f;
+    BaseSpeed = 600.0f;
+
+    // Initialize current values
+    CurrentHealth = BaseMaxHealth;
+    MaxHealth = BaseMaxHealth;
+    CurrentDamage = BaseDamage;
+    CurrentSpeed = BaseSpeed;
+
+    // Initialize bonuses to 0
+    SkillHealthBonus = 0.0f;
+    SkillDamageBonus = 0.0f;
+    SkillSpeedBonus = 0.0f;
+    SkillHealthBonusPercent = 0.0f;
+    SkillDamageBonusPercent = 0.0f;
+    SkillSpeedBonusPercent = 0.0f;
+}
+
+void UCharacterStatsComponent::BeginPlay()
+{
+    Super::BeginPlay();
+
+    // Find the skill tree component on the same actor
+    AActor* Owner = GetOwner();
+    if (Owner)
+    {
+        OwnerSkillTree = Owner->FindComponentByClass<USkillTreeComponent>();
+
+        // Bind to skill tree events
+        if (OwnerSkillTree)
+        {
+            OwnerSkillTree->OnSkillPurchased.AddDynamic(this, &UCharacterStatsComponent::OnSkillPurchased);
+        }
+    }
+
+    InitializeStats();
+}
+
+void UCharacterStatsComponent::InitializeStats()
+{
+    MaxHealth = BaseMaxHealth;
+    CurrentHealth = MaxHealth;
+    CurrentDamage = BaseDamage;
+    CurrentSpeed = BaseSpeed;
+
+    RecalculateStats();
+}
+
+void UCharacterStatsComponent::OnSkillPurchased(FName SkillID)
+{
+    // Called when a skill is purchased, update all stats
+    UpdateStatsFromSkillTree();
+}
+
+void UCharacterStatsComponent::UpdateStatsFromSkillTree()
+{
+    if (!OwnerSkillTree)
+    {
+        return;
+    }
+
+    // Reset skill bonuses
+    SkillHealthBonus = 0.0f;
+    SkillDamageBonus = 0.0f;
+    SkillSpeedBonus = 0.0f;
+    SkillHealthBonusPercent = 0.0f;
+    SkillDamageBonusPercent = 0.0f;
+    SkillSpeedBonusPercent = 0.0f;
+
+    // Calculate total bonuses from purchased skills
+    TArray<FSkillNodeRuntime> AllSkills = OwnerSkillTree->GetAllSkillNodes();
+    for (const FSkillNodeRuntime& Skill : AllSkills)
+    {
+        if (Skill.CurrentState == ESkillNodeState::Purchased)
+        {
+            // Add flat bonuses
+            SkillHealthBonus += Skill.NodeData.HealthBonus;
+            SkillDamageBonus += Skill.NodeData.DamageBonus;
+            SkillSpeedBonus += Skill.NodeData.SpeedBonus;
+
+            // Add percentage bonuses
+            SkillHealthBonusPercent += Skill.NodeData.HealthBonusPercent;
+            SkillDamageBonusPercent += Skill.NodeData.DamageBonusPercent;
+            SkillSpeedBonusPercent += Skill.NodeData.SpeedBonusPercent;
+        }
+    }
+
+    RecalculateStats();
+}
+
+void UCharacterStatsComponent::RecalculateStats()
+{
+    // Calculate final stats: Base + Flat Bonus + (Base * Percentage Bonus)
+    float OldMaxHealth = MaxHealth;
+
+    MaxHealth = BaseMaxHealth + SkillHealthBonus + (BaseMaxHealth * SkillHealthBonusPercent / 100.0f);
+    CurrentDamage = BaseDamage + SkillDamageBonus + (BaseDamage * SkillDamageBonusPercent / 100.0f);
+    CurrentSpeed = BaseSpeed + SkillSpeedBonus + (BaseSpeed * SkillSpeedBonusPercent / 100.0f);
+
+    // Scale current health proportionally if max health changed
+    if (OldMaxHealth > 0 && MaxHealth != OldMaxHealth)
+    {
+        float HealthPercent = CurrentHealth / OldMaxHealth;
+        CurrentHealth = MaxHealth * HealthPercent;
+    }
+
+    // Apply speed to character movement
+    ApplySpeedToMovement();
+
+    // Broadcast events
+    OnHealthChanged.Broadcast(CurrentHealth, MaxHealth);
+    OnDamageChanged.Broadcast(CurrentDamage);
+    OnSpeedChanged.Broadcast(CurrentSpeed);
+    OnStatsUpdated.Broadcast();
+
+    UE_LOG(LogTemp, Log, TEXT("Stats Updated - Health: %.0f/%.0f, Damage: %.0f, Speed: %.0f"),
+        CurrentHealth, MaxHealth, CurrentDamage, CurrentSpeed);
+}
+
+void UCharacterStatsComponent::TakeDamage(float DamageAmount)
+{
+    if (DamageAmount <= 0.0f)
+    {
+        return;
+    }
+
+    CurrentHealth = FMath::Clamp(CurrentHealth - DamageAmount, 0.0f, MaxHealth);
+    OnHealthChanged.Broadcast(CurrentHealth, MaxHealth);
+
+    if (CurrentHealth <= 0.0f)
+    {
+        UE_LOG(LogTemp, Warning, TEXT("Character has died!"));
+    }
+}
+
+void UCharacterStatsComponent::Heal(float HealAmount)
+{
+    if (HealAmount <= 0.0f)
+    {
+        return;
+    }
+
+    CurrentHealth = FMath::Clamp(CurrentHealth + HealAmount, 0.0f, MaxHealth);
+    OnHealthChanged.Broadcast(CurrentHealth, MaxHealth);
+}
+
+void UCharacterStatsComponent::SetHealth(float NewHealth)
+{
+    CurrentHealth = FMath::Clamp(NewHealth, 0.0f, MaxHealth);
+    OnHealthChanged.Broadcast(CurrentHealth, MaxHealth);
+}
+
+FText UCharacterStatsComponent::GetHealthText() const
+{
+    return FText::Format(FText::FromString(TEXT("{0:.0f} / {1:.0f}")),
+        FText::AsNumber(CurrentHealth),
+        FText::AsNumber(MaxHealth));
+}
+
+FText UCharacterStatsComponent::GetDamageText() const
+{
+    return FText::Format(FText::FromString(TEXT("Damage: {0:.0f}")),
+        FText::AsNumber(CurrentDamage));
+}
+
+FText UCharacterStatsComponent::GetSpeedText() const
+{
+    return FText::Format(FText::FromString(TEXT("Speed: {0:.0f}")),
+        FText::AsNumber(CurrentSpeed));
+}
+
+void UCharacterStatsComponent::ApplySpeedToMovement()
+{
+    // Apply speed to character movement component
+    ACharacter* CharacterOwner = Cast<ACharacter>(GetOwner());
+    if (CharacterOwner && CharacterOwner->GetCharacterMovement())
+    {
+        CharacterOwner->GetCharacterMovement()->MaxWalkSpeed = CurrentSpeed;
+        UE_LOG(LogTemp, Log, TEXT("Applied movement speed: %.0f"), CurrentSpeed);
+    }
+}

Source/UTAD_UI/SkillTree/CharacterStatsComponent.h

@@ -0,0 +1,140 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Components/ActorComponent.h"
+#include "CharacterStatsComponent.generated.h"
+
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnHealthChanged, float, CurrentHealth, float, MaxHealth);
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnDamageChanged, float, CurrentDamage);
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnSpeedChanged, float, CurrentSpeed);
+DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnStatsUpdated);
+
+UCLASS(ClassGroup=(Custom), meta=(BlueprintSpawnableComponent))
+class UTAD_UI_API UCharacterStatsComponent : public UActorComponent
+{
+    GENERATED_BODY()
+
+public:
+    UCharacterStatsComponent();
+
+protected:
+    virtual void BeginPlay() override;
+
+    // Base stats (without any bonuses)
+    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Base Stats")
+    float BaseMaxHealth;
+
+    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Base Stats")
+    float BaseDamage;
+
+    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Base Stats")
+    float BaseSpeed;
+
+    // Current values
+    UPROPERTY(BlueprintReadOnly, Category = "Current Stats")
+    float CurrentHealth;
+
+    // Calculated stats (base + bonuses)
+    UPROPERTY(BlueprintReadOnly, Category = "Current Stats")
+    float MaxHealth;
+
+    UPROPERTY(BlueprintReadOnly, Category = "Current Stats")
+    float CurrentDamage;
+
+    UPROPERTY(BlueprintReadOnly, Category = "Current Stats")
+    float CurrentSpeed;
+
+    // Skill tree bonuses (flat bonuses)
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Bonuses")
+    float SkillHealthBonus;
+
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Bonuses")
+    float SkillDamageBonus;
+
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Bonuses")
+    float SkillSpeedBonus;
+
+    // Skill tree bonuses (percentage bonuses)
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Bonuses")
+    float SkillHealthBonusPercent;
+
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Bonuses")
+    float SkillDamageBonusPercent;
+
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Bonuses")
+    float SkillSpeedBonusPercent;
+
+public:
+    // Initialize stats
+    UFUNCTION(BlueprintCallable, Category = "Character Stats")
+    void InitializeStats();
+
+    // Update stats from skill tree
+    UFUNCTION(BlueprintCallable, Category = "Character Stats")
+    void UpdateStatsFromSkillTree();
+
+    // Called when a skill is purchased
+    UFUNCTION()
+    void OnSkillPurchased(FName SkillID);
+
+    // Calculate final stats
+    UFUNCTION(BlueprintCallable, Category = "Character Stats")
+    void RecalculateStats();
+
+    // Getters for current stats
+    UFUNCTION(BlueprintPure, Category = "Character Stats")
+    float GetCurrentHealth() const { return CurrentHealth; }
+
+    UFUNCTION(BlueprintPure, Category = "Character Stats")
+    float GetMaxHealth() const { return MaxHealth; }
+
+    UFUNCTION(BlueprintPure, Category = "Character Stats")
+    float GetHealthPercentage() const { return MaxHealth > 0 ? CurrentHealth / MaxHealth : 0.0f; }
+
+    UFUNCTION(BlueprintPure, Category = "Character Stats")
+    float GetCurrentDamage() const { return CurrentDamage; }
+
+    UFUNCTION(BlueprintPure, Category = "Character Stats")
+    float GetCurrentSpeed() const { return CurrentSpeed; }
+
+    // Health management
+    UFUNCTION(BlueprintCallable, Category = "Character Stats")
+    void TakeDamage(float DamageAmount);
+
+    UFUNCTION(BlueprintCallable, Category = "Character Stats")
+    void Heal(float HealAmount);
+
+    UFUNCTION(BlueprintCallable, Category = "Character Stats")
+    void SetHealth(float NewHealth);
+
+    // Get formatted text for UI
+    UFUNCTION(BlueprintPure, Category = "Character Stats UI")
+    FText GetHealthText() const;
+
+    UFUNCTION(BlueprintPure, Category = "Character Stats UI")
+    FText GetDamageText() const;
+
+    UFUNCTION(BlueprintPure, Category = "Character Stats UI")
+    FText GetSpeedText() const;
+
+    // Events
+    UPROPERTY(BlueprintAssignable, Category = "Stats Events")
+    FOnHealthChanged OnHealthChanged;
+
+    UPROPERTY(BlueprintAssignable, Category = "Stats Events")
+    FOnDamageChanged OnDamageChanged;
+
+    UPROPERTY(BlueprintAssignable, Category = "Stats Events")
+    FOnSpeedChanged OnSpeedChanged;
+
+    UPROPERTY(BlueprintAssignable, Category = "Stats Events")
+    FOnStatsUpdated OnStatsUpdated;
+
+private:
+    // Apply speed to character movement
+    void ApplySpeedToMovement();
+
+    // Reference to owner's skill tree component
+    UPROPERTY()
+    class USkillTreeComponent* OwnerSkillTree;
+};

Source/UTAD_UI/SkillTree/SkillTreeBlueprintLibrary.cpp

@@ -0,0 +1,249 @@
+#include "SkillTreeBlueprintLibrary.h"
+#include "SkillTreeComponent.h"
+
+FLinearColor USkillTreeBlueprintLibrary::GetSkillStateColor(ESkillNodeState State)
+{
+    switch (State)
+    {
+    case ESkillNodeState::Locked:
+        return FLinearColor(0.3f, 0.3f, 0.3f, 1.0f);  // Gray
+    case ESkillNodeState::Available:
+        return FLinearColor(1.0f, 1.0f, 1.0f, 1.0f);  // White
+    case ESkillNodeState::Selected:
+        return FLinearColor(1.0f, 0.8f, 0.0f, 1.0f);  // Gold
+    case ESkillNodeState::Purchased:
+        return FLinearColor(0.0f, 1.0f, 0.0f, 1.0f);  // Green
+    default:
+        return FLinearColor::White;
+    }
+}
+
+FText USkillTreeBlueprintLibrary::GetSkillStateText(ESkillNodeState State)
+{
+    switch (State)
+    {
+    case ESkillNodeState::Locked:
+        return FText::FromString(TEXT("Locked"));
+    case ESkillNodeState::Available:
+        return FText::FromString(TEXT("Available"));
+    case ESkillNodeState::Selected:
+        return FText::FromString(TEXT("Selected"));
+    case ESkillNodeState::Purchased:
+        return FText::FromString(TEXT("Purchased"));
+    default:
+        return FText::FromString(TEXT("Unknown"));
+    }
+}
+
+FText USkillTreeBlueprintLibrary::GetSkillAvailabilityText(USkillTreeComponent* SkillTreeComponent, FName SkillID)
+{
+    if (!SkillTreeComponent)
+    {
+        return FText::FromString(TEXT("No Skill Tree Component"));
+    }
+
+    FSkillNodeRuntime NodeData;
+    if (!SkillTreeComponent->GetSkillNodeData(SkillID, NodeData))
+    {
+        return FText::FromString(TEXT("Invalid Skill"));
+    }
+
+    ESkillNodeState State = SkillTreeComponent->GetSkillState(SkillID);
+
+    switch (State)
+    {
+    case ESkillNodeState::Purchased:
+        return FText::FromString(TEXT("Already Purchased"));
+    case ESkillNodeState::Selected:
+        return FText::FromString(TEXT("Selected for Purchase"));
+    case ESkillNodeState::Available:
+        return FText::Format(FText::FromString(TEXT("Available - Cost: {0} Points")), NodeData.NodeData.Cost);
+    case ESkillNodeState::Locked:
+        {
+            // Check why it's locked
+            if (NodeData.NodeData.Prerequisites.Num() > 0)
+            {
+                FString MissingPrereqs;
+                for (const FName& PrereqID : NodeData.NodeData.Prerequisites)
+                {
+                    if (!SkillTreeComponent->IsSkillPurchased(PrereqID))
+                    {
+                        FSkillNodeRuntime PrereqData;
+                        if (SkillTreeComponent->GetSkillNodeData(PrereqID, PrereqData))
+                        {
+                            if (!MissingPrereqs.IsEmpty())
+                            {
+                                MissingPrereqs += TEXT(", ");
+                            }
+                            MissingPrereqs += PrereqData.NodeData.DisplayName.ToString();
+                        }
+                    }
+                }
+                return FText::Format(FText::FromString(TEXT("Requires: {0}")), FText::FromString(MissingPrereqs));
+            }
+            return FText::FromString(TEXT("Locked"));
+        }
+    default:
+        return FText::FromString(TEXT("Unknown State"));
+    }
+}
+
+FText USkillTreeBlueprintLibrary::FormatSkillDescription(const FSkillNodeData& NodeData)
+{
+    FString Description = NodeData.Description.ToString();
+
+    // Add effect descriptions
+    FString Effects;
+
+    if (NodeData.HealthBonus > 0)
+    {
+        Effects += FString::Printf(TEXT("\n+%.0f Health"), NodeData.HealthBonus);
+    }
+    if (NodeData.HealthBonusPercent > 0)
+    {
+        Effects += FString::Printf(TEXT("\n+%.0f%% Health"), NodeData.HealthBonusPercent);
+    }
+    if (NodeData.DamageBonus > 0)
+    {
+        Effects += FString::Printf(TEXT("\n+%.0f Damage"), NodeData.DamageBonus);
+    }
+    if (NodeData.DamageBonusPercent > 0)
+    {
+        Effects += FString::Printf(TEXT("\n+%.0f%% Damage"), NodeData.DamageBonusPercent);
+    }
+    if (NodeData.SpeedBonus > 0)
+    {
+        Effects += FString::Printf(TEXT("\n+%.0f Speed"), NodeData.SpeedBonus);
+    }
+    if (NodeData.SpeedBonusPercent > 0)
+    {
+        Effects += FString::Printf(TEXT("\n+%.0f%% Speed"), NodeData.SpeedBonusPercent);
+    }
+
+    if (!Effects.IsEmpty())
+    {
+        Description += TEXT("\n\nEffects:") + Effects;
+    }
+
+    return FText::FromString(Description);
+}
+
+
+float USkillTreeBlueprintLibrary::GetPreviewTotalDamageBonus(USkillTreeComponent* SkillTreeComponent)
+{
+    if (!SkillTreeComponent)
+    {
+        return 0.0f;
+    }
+
+    float Total = SkillTreeComponent->GetTotalDamageBonus();
+
+    // Add selected (but not purchased) skills
+    TArray<FName> SelectedSkills = SkillTreeComponent->GetSelectedSkills();
+    for (const FName& SkillID : SelectedSkills)
+    {
+        FSkillNodeRuntime NodeData;
+        if (SkillTreeComponent->GetSkillNodeData(SkillID, NodeData))
+        {
+            Total += NodeData.NodeData.DamageBonus;
+        }
+    }
+
+    return Total;
+}
+
+
+float USkillTreeBlueprintLibrary::GetPreviewTotalSpeedBonus(USkillTreeComponent* SkillTreeComponent)
+{
+    if (!SkillTreeComponent)
+    {
+        return 0.0f;
+    }
+
+    float Total = SkillTreeComponent->GetTotalSpeedBonus();
+
+    // Add selected (but not purchased) skills
+    TArray<FName> SelectedSkills = SkillTreeComponent->GetSelectedSkills();
+    for (const FName& SkillID : SelectedSkills)
+    {
+        FSkillNodeRuntime NodeData;
+        if (SkillTreeComponent->GetSkillNodeData(SkillID, NodeData))
+        {
+            Total += NodeData.NodeData.SpeedBonus;
+        }
+    }
+
+    return Total;
+}
+
+float USkillTreeBlueprintLibrary::GetPreviewTotalHealthBonus(USkillTreeComponent* SkillTreeComponent)
+{
+    if (!SkillTreeComponent)
+    {
+        return 0.0f;
+    }
+
+    float Total = SkillTreeComponent->GetTotalHealthBonus();
+
+    // Add selected (but not purchased) skills
+    TArray<FName> SelectedSkills = SkillTreeComponent->GetSelectedSkills();
+    for (const FName& SkillID : SelectedSkills)
+    {
+        FSkillNodeRuntime NodeData;
+        if (SkillTreeComponent->GetSkillNodeData(SkillID, NodeData))
+        {
+            Total += NodeData.NodeData.HealthBonus;
+        }
+    }
+
+    return Total;
+}
+
+bool USkillTreeBlueprintLibrary::HasSelectedSkills(USkillTreeComponent* SkillTreeComponent)
+{
+    if (!SkillTreeComponent)
+    {
+        return false;
+    }
+
+    return SkillTreeComponent->GetSelectedSkills().Num() > 0;
+}
+
+bool USkillTreeBlueprintLibrary::CanPlayerRespec(USkillTreeComponent* SkillTreeComponent)
+{
+    if (!SkillTreeComponent)
+    {
+        return false;
+    }
+
+    // Check if player has any purchased skills to reset
+    TArray<FSkillNodeRuntime> AllNodes = SkillTreeComponent->GetAllSkillNodes();
+    for (const FSkillNodeRuntime& Node : AllNodes)
+    {
+        if (Node.CurrentState == ESkillNodeState::Purchased)
+        {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+TArray<FName> USkillTreeBlueprintLibrary::GetSkillConnections(USkillTreeComponent* SkillTreeComponent, FName SkillID)
+{
+    TArray<FName> Connections;
+
+    if (!SkillTreeComponent)
+    {
+        return Connections;
+    }
+
+    FSkillNodeRuntime NodeData;
+    if (SkillTreeComponent->GetSkillNodeData(SkillID, NodeData))
+    {
+        // Return the prerequisites as connections
+        Connections = NodeData.NodeData.Prerequisites;
+    }
+
+    return Connections;
+}

Source/UTAD_UI/SkillTree/SkillTreeBlueprintLibrary.h

@@ -0,0 +1,56 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Kismet/BlueprintFunctionLibrary.h"
+#include "SkillTreeTypes.h"
+#include "SkillTreeBlueprintLibrary.generated.h"
+
+// Forward declarations
+class USkillTreeComponent;
+
+UCLASS()
+class UTAD_UI_API USkillTreeBlueprintLibrary : public UBlueprintFunctionLibrary
+{
+    GENERATED_BODY()
+
+public:
+    // UI Helper Functions
+
+    // Get state color for UI display
+    UFUNCTION(BlueprintPure, Category = "Skill Tree UI", meta = (DisplayName = "Get Skill State Color"))
+    static FLinearColor GetSkillStateColor(ESkillNodeState State);
+
+    // Get state text for UI display
+    UFUNCTION(BlueprintPure, Category = "Skill Tree UI", meta = (DisplayName = "Get Skill State Text"))
+    static FText GetSkillStateText(ESkillNodeState State);
+
+    // Check if a skill can be selected with detailed reason
+    UFUNCTION(BlueprintPure, Category = "Skill Tree UI", meta = (DisplayName = "Get Skill Availability Text"))
+    static FText GetSkillAvailabilityText(USkillTreeComponent* SkillTreeComponent, FName SkillID);
+
+    // Get formatted description with current values
+    UFUNCTION(BlueprintPure, Category = "Skill Tree UI", meta = (DisplayName = "Format Skill Description"))
+    static FText FormatSkillDescription(const FSkillNodeData& NodeData);
+
+    // Calculate total stats preview (including selected but not purchased skills)
+    UFUNCTION(BlueprintPure, Category = "Skill Tree UI", meta = (DisplayName = "Get Preview Total Health Bonus"))
+    static float GetPreviewTotalHealthBonus(USkillTreeComponent* SkillTreeComponent);
+
+    UFUNCTION(BlueprintPure, Category = "Skill Tree UI", meta = (DisplayName = "Get Preview Total Damage Bonus"))
+    static float GetPreviewTotalDamageBonus(USkillTreeComponent* SkillTreeComponent);
+
+    UFUNCTION(BlueprintPure, Category = "Skill Tree UI", meta = (DisplayName = "Get Preview Total Speed Bonus"))
+    static float GetPreviewTotalSpeedBonus(USkillTreeComponent* SkillTreeComponent);
+
+    // Check if any skills are selected
+    UFUNCTION(BlueprintPure, Category = "Skill Tree UI", meta = (DisplayName = "Has Selected Skills"))
+    static bool HasSelectedSkills(USkillTreeComponent* SkillTreeComponent);
+
+    // Check if player can respec
+    UFUNCTION(BlueprintPure, Category = "Skill Tree UI", meta = (DisplayName = "Can Player Respec"))
+    static bool CanPlayerRespec(USkillTreeComponent* SkillTreeComponent);
+
+    // Get the connections between skills for line rendering
+    UFUNCTION(BlueprintPure, Category = "Skill Tree UI", meta = (DisplayName = "Get Skill Connections"))
+    static TArray<FName> GetSkillConnections(USkillTreeComponent* SkillTreeComponent, FName SkillID);
+};

Source/UTAD_UI/SkillTree/SkillTreeComponent.cpp

@@ -0,0 +1,557 @@
+#include "SkillTreeComponent.h"
+#include "Engine/DataTable.h"
+
+USkillTreeComponent::USkillTreeComponent()
+{
+    PrimaryComponentTick.bCanEverTick = false;
+
+    AvailableSkillPoints = 5; // Start with 5 skill points for testing
+    TotalSkillPointsEarned = 5;
+    CurrentSelectionCost = 0;
+}
+
+void USkillTreeComponent::BeginPlay()
+{
+    Super::BeginPlay();
+    InitializeSkillTree();
+}
+
+void USkillTreeComponent::InitializeSkillTree()
+{
+    AllSkills.Empty();
+
+    if (!SkillDataTable)
+    {
+        UE_LOG(LogTemp, Warning, TEXT("SkillTreeComponent: No skill data table assigned!"));
+        return;
+    }
+
+    // Load all skills from the data table using RowNames as IDs
+    TArray<FName> RowNames = SkillDataTable->GetRowNames();
+
+    for (const FName& RowName : RowNames)
+    {
+        FSkillNodeData* Row = SkillDataTable->FindRow<FSkillNodeData>(RowName, TEXT("SkillTreeComponent"));
+        if (Row)
+        {
+            FSkillNodeRuntime RuntimeNode;
+            RuntimeNode.NodeData = *Row;
+            RuntimeNode.CurrentState = ESkillNodeState::Locked;
+            RuntimeNode.bIsSelected = false;
+
+            // Use RowName as the skill ID
+            AllSkills.Add(RowName, RuntimeNode);
+        }
+    }
+
+    UpdateSkillStates();
+
+    UE_LOG(LogTemp, Log, TEXT("SkillTreeComponent: Initialized with %d skills"), AllSkills.Num());
+}
+
+void USkillTreeComponent::AddSkillPoints(int32 Amount)
+{
+    if (Amount > 0)
+    {
+        AvailableSkillPoints += Amount;
+        TotalSkillPointsEarned += Amount;
+        OnSkillPointsChanged.Broadcast(AvailableSkillPoints);
+        UpdateSkillStates();
+    }
+}
+
+void USkillTreeComponent::RemoveSkillPoints(int32 Amount)
+{
+    if (Amount > 0)
+    {
+        AvailableSkillPoints = FMath::Max(0, AvailableSkillPoints - Amount);
+        OnSkillPointsChanged.Broadcast(AvailableSkillPoints);
+        UpdateSkillStates();
+    }
+}
+
+bool USkillTreeComponent::SelectSkill(FName SkillID)
+{
+    FText ErrorMessage;
+
+    // Check if skill exists
+    if (!AllSkills.Contains(SkillID))
+    {
+        ErrorMessage = FText::FromString(TEXT("Skill does not exist"));
+        OnSelectionError.Broadcast(SkillID, ErrorMessage);
+        return false;
+    }
+
+    FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID);
+
+    // Check if already purchased
+    if (SkillNode->CurrentState == ESkillNodeState::Purchased)
+    {
+        ErrorMessage = FText::FromString(TEXT("Skill already purchased"));
+        OnSelectionError.Broadcast(SkillID, ErrorMessage);
+        return false;
+    }
+
+    // Check if already selected
+    if (SkillNode->bIsSelected)
+    {
+        ErrorMessage = FText::FromString(TEXT("Skill already selected"));
+        OnSelectionError.Broadcast(SkillID, ErrorMessage);
+        return false;
+    }
+
+    // For locked skills, we allow selection but will validate on purchase
+    // This allows players to "plan" their build
+    if (SkillNode->CurrentState == ESkillNodeState::Locked)
+    {
+        // Check if prerequisites would be met with current selection
+        bool bWouldBeAvailable = true;
+        for (const FName& PrereqID : SkillNode->NodeData.Prerequisites)
+        {
+            if (!IsSkillPurchased(PrereqID) && !IsSkillSelected(PrereqID))
+            {
+                bWouldBeAvailable = false;
+                break;
+            }
+        }
+
+        if (!bWouldBeAvailable)
+        {
+            ErrorMessage = FText::FromString(TEXT("Prerequisites not selected. Select prerequisite skills first."));
+            OnSelectionError.Broadcast(SkillID, ErrorMessage);
+            return false;
+        }
+    }
+
+    // Add to selection
+    SkillNode->bIsSelected = true;
+    SelectedSkills.Add(SkillID);
+    UpdateSelectionCost();
+
+    OnSkillSelectionChanged.Broadcast(CurrentSelectionCost);
+    OnSkillStateChanged.Broadcast(SkillID);
+
+    return true;
+}
+
+bool USkillTreeComponent::DeselectSkill(FName SkillID)
+{
+    if (!AllSkills.Contains(SkillID))
+    {
+        return false;
+    }
+
+    FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID);
+
+    if (!SkillNode->bIsSelected)
+    {
+        return false;
+    }
+
+    // Check if any selected skills depend on this one
+    for (const FName& SelectedID : SelectedSkills)
+    {
+        if (SelectedID != SkillID)
+        {
+            FSkillNodeRuntime* SelectedNode = AllSkills.Find(SelectedID);
+            if (SelectedNode && SelectedNode->NodeData.Prerequisites.Contains(SkillID))
+            {
+                // Can't deselect if other selected skills depend on it
+                FText ErrorMessage = FText::FromString(TEXT("Other selected skills depend on this one"));
+                OnSelectionError.Broadcast(SkillID, ErrorMessage);
+                return false;
+            }
+        }
+    }
+
+    // Remove from selection
+    SkillNode->bIsSelected = false;
+    SelectedSkills.Remove(SkillID);
+    UpdateSelectionCost();
+
+    OnSkillSelectionChanged.Broadcast(CurrentSelectionCost);
+    OnSkillStateChanged.Broadcast(SkillID);
+
+    return true;
+}
+
+void USkillTreeComponent::ClearSelection()
+{
+    for (const FName& SkillID : SelectedSkills)
+    {
+        if (FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID))
+        {
+            SkillNode->bIsSelected = false;
+            OnSkillStateChanged.Broadcast(SkillID);
+        }
+    }
+
+    SelectedSkills.Empty();
+    UpdateSelectionCost();
+    OnSkillSelectionChanged.Broadcast(CurrentSelectionCost);
+}
+
+bool USkillTreeComponent::ConfirmPurchase()
+{
+    // Validate we can afford it
+    if (!CanAffordSelection())
+    {
+        FText ErrorMessage = FText::FromString(TEXT("Not enough skill points"));
+        OnSelectionError.Broadcast(NAME_None, ErrorMessage);
+        return false;
+    }
+
+    // Sort selected skills by purchase order to ensure prerequisites are purchased first
+    TArray<FName> SortedSelection = SelectedSkills;
+    SortedSelection.Sort([this](const FName& A, const FName& B) {
+        FSkillNodeRuntime* NodeA = AllSkills.Find(A);
+        FSkillNodeRuntime* NodeB = AllSkills.Find(B);
+        if (NodeA && NodeB)
+        {
+            return NodeA->NodeData.PurchaseOrder < NodeB->NodeData.PurchaseOrder;
+        }
+        return false;
+    });
+
+    // Validate all skills can be purchased in order
+    for (const FName& SkillID : SortedSelection)
+    {
+        FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID);
+        if (!SkillNode)
+        {
+            continue;
+        }
+
+        // Check prerequisites (considering already processed skills in this batch)
+        bool bPrereqsMet = true;
+        for (const FName& PrereqID : SkillNode->NodeData.Prerequisites)
+        {
+            if (!IsSkillPurchased(PrereqID))
+            {
+                // Check if it's in our current batch and would be purchased before this
+                int32 PrereqIndex = SortedSelection.IndexOfByKey(PrereqID);
+                int32 CurrentIndex = SortedSelection.IndexOfByKey(SkillID);
+
+                if (PrereqIndex == INDEX_NONE || PrereqIndex >= CurrentIndex)
+                {
+                    bPrereqsMet = false;
+                    break;
+                }
+            }
+        }
+
+        if (!bPrereqsMet)
+        {
+            FText ErrorMessage = FText::Format(
+                FText::FromString(TEXT("Cannot purchase {0}: prerequisites not met")),
+                SkillNode->NodeData.DisplayName
+            );
+            OnSelectionError.Broadcast(SkillID, ErrorMessage);
+            return false;
+        }
+    }
+
+    // Purchase all selected skills
+    for (const FName& SkillID : SortedSelection)
+    {
+        FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID);
+        if (SkillNode)
+        {
+            // Mark as purchased
+            SkillNode->CurrentState = ESkillNodeState::Purchased;
+            SkillNode->bIsSelected = false;
+            PurchasedSkills.Add(SkillID);
+
+            // Apply effects
+            ApplySkillEffects(SkillNode->NodeData);
+
+            // Broadcast purchase event
+            OnSkillPurchased.Broadcast(SkillID);
+            OnSkillStateChanged.Broadcast(SkillID);
+        }
+    }
+
+    // Deduct skill points
+    RemoveSkillPoints(CurrentSelectionCost);
+
+    // Clear selection
+    SelectedSkills.Empty();
+    UpdateSelectionCost();
+    UpdateSkillStates();
+
+    OnSkillSelectionChanged.Broadcast(CurrentSelectionCost);
+
+    return true;
+}
+
+bool USkillTreeComponent::IsSkillPurchased(FName SkillID) const
+{
+    return PurchasedSkills.Contains(SkillID);
+}
+
+bool USkillTreeComponent::IsSkillSelected(FName SkillID) const
+{
+    return SelectedSkills.Contains(SkillID);
+}
+
+bool USkillTreeComponent::IsSkillAvailable(FName SkillID) const
+{
+    const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID);
+    if (!SkillNode)
+    {
+        return false;
+    }
+
+    return SkillNode->CurrentState == ESkillNodeState::Available;
+}
+
+bool USkillTreeComponent::CanSelectSkill(FName SkillID, FText& OutErrorMessage) const
+{
+    const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID);
+    if (!SkillNode)
+    {
+        OutErrorMessage = FText::FromString(TEXT("Skill does not exist"));
+        return false;
+    }
+
+    if (SkillNode->CurrentState == ESkillNodeState::Purchased)
+    {
+        OutErrorMessage = FText::FromString(TEXT("Skill already purchased"));
+        return false;
+    }
+
+    if (SkillNode->bIsSelected)
+    {
+        OutErrorMessage = FText::FromString(TEXT("Skill already selected"));
+        return false;
+    }
+
+    OutErrorMessage = FText::GetEmpty();
+    return true;
+}
+
+ESkillNodeState USkillTreeComponent::GetSkillState(FName SkillID) const
+{
+    const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID);
+    if (SkillNode)
+    {
+        return SkillNode->CurrentState;
+    }
+
+    return ESkillNodeState::Locked;
+}
+
+bool USkillTreeComponent::GetSkillNodeData(FName SkillID, FSkillNodeRuntime& OutNodeData) const
+{
+    const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID);
+    if (SkillNode)
+    {
+        OutNodeData = *SkillNode;
+        return true;
+    }
+
+    return false;
+}
+
+TArray<FSkillNodeRuntime> USkillTreeComponent::GetAllSkillNodes() const
+{
+    TArray<FSkillNodeRuntime> Result;
+    for (const auto& Pair : AllSkills)
+    {
+        Result.Add(Pair.Value);
+    }
+    return Result;
+}
+
+float USkillTreeComponent::GetTotalHealthBonus() const
+{
+    float Total = 0.0f;
+    for (const FName& SkillID : PurchasedSkills)
+    {
+        if (const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID))
+        {
+            Total += SkillNode->NodeData.HealthBonus;
+        }
+    }
+    return Total;
+}
+
+float USkillTreeComponent::GetTotalDamageBonus() const
+{
+    float Total = 0.0f;
+    for (const FName& SkillID : PurchasedSkills)
+    {
+        if (const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID))
+        {
+            Total += SkillNode->NodeData.DamageBonus;
+        }
+    }
+    return Total;
+}
+
+float USkillTreeComponent::GetTotalSpeedBonus() const
+{
+    float Total = 0.0f;
+    for (const FName& SkillID : PurchasedSkills)
+    {
+        if (const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID))
+        {
+            Total += SkillNode->NodeData.SpeedBonus;
+        }
+    }
+    return Total;
+}
+
+float USkillTreeComponent::GetTotalHealthBonusPercent() const
+{
+    float Total = 0.0f;
+    for (const FName& SkillID : PurchasedSkills)
+    {
+        if (const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID))
+        {
+            Total += SkillNode->NodeData.HealthBonusPercent;
+        }
+    }
+    return Total;
+}
+
+float USkillTreeComponent::GetTotalDamageBonusPercent() const
+{
+    float Total = 0.0f;
+    for (const FName& SkillID : PurchasedSkills)
+    {
+        if (const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID))
+        {
+            Total += SkillNode->NodeData.DamageBonusPercent;
+        }
+    }
+    return Total;
+}
+
+float USkillTreeComponent::GetTotalSpeedBonusPercent() const
+{
+    float Total = 0.0f;
+    for (const FName& SkillID : PurchasedSkills)
+    {
+        if (const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID))
+        {
+            Total += SkillNode->NodeData.SpeedBonusPercent;
+        }
+    }
+    return Total;
+}
+
+void USkillTreeComponent::ResetAllSkills()
+{
+    // Refund all skill points
+    int32 RefundAmount = 0;
+    for (const FName& SkillID : PurchasedSkills)
+    {
+        if (const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID))
+        {
+            RefundAmount += SkillNode->NodeData.Cost;
+            RemoveSkillEffects(SkillNode->NodeData);
+        }
+    }
+
+    // Clear purchases
+    PurchasedSkills.Empty();
+
+    // Reset all skill states
+    for (auto& Pair : AllSkills)
+    {
+        Pair.Value.CurrentState = ESkillNodeState::Locked;
+        Pair.Value.bIsSelected = false;
+    }
+
+    // Clear selection
+    SelectedSkills.Empty();
+    CurrentSelectionCost = 0;
+
+    // Add refunded points
+    AddSkillPoints(RefundAmount);
+
+    // Update states
+    UpdateSkillStates();
+
+    // Broadcast events
+    OnSkillSelectionChanged.Broadcast(CurrentSelectionCost);
+}
+
+void USkillTreeComponent::UpdateSkillStates()
+{
+    for (auto& Pair : AllSkills)
+    {
+        FSkillNodeRuntime& SkillNode = Pair.Value;
+
+        // Skip if already purchased
+        if (SkillNode.CurrentState == ESkillNodeState::Purchased)
+        {
+            continue;
+        }
+
+        // Check if prerequisites are met
+        if (ArePrerequisitesMet(SkillNode.NodeData))
+        {
+            SkillNode.CurrentState = SkillNode.bIsSelected ?
+                ESkillNodeState::Selected : ESkillNodeState::Available;
+        }
+        else
+        {
+            SkillNode.CurrentState = SkillNode.bIsSelected ?
+                ESkillNodeState::Selected : ESkillNodeState::Locked;
+        }
+    }
+}
+
+void USkillTreeComponent::UpdateSelectionCost()
+{
+    CurrentSelectionCost = 0;
+    for (const FName& SkillID : SelectedSkills)
+    {
+        if (const FSkillNodeRuntime* SkillNode = AllSkills.Find(SkillID))
+        {
+            CurrentSelectionCost += SkillNode->NodeData.Cost;
+        }
+    }
+}
+
+bool USkillTreeComponent::ArePrerequisitesMet(const FSkillNodeData& SkillData) const
+{
+    for (const FName& PrereqID : SkillData.Prerequisites)
+    {
+        if (!IsSkillPurchased(PrereqID))
+        {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool USkillTreeComponent::HasChildrenPurchased(FName SkillID) const
+{
+    for (const auto& Pair : AllSkills)
+    {
+        // Pair.Key is the RowName (SkillID)
+        if (Pair.Value.NodeData.Prerequisites.Contains(SkillID) &&
+            IsSkillPurchased(Pair.Key))
+        {
+            return true;
+        }
+    }
+    return false;
+}
+
+void USkillTreeComponent::ApplySkillEffects(const FSkillNodeData& SkillData)
+{
+    // This is where you would apply the actual skill effects to the character
+    // For now, we just log it
+    UE_LOG(LogTemp, Log, TEXT("Applied skill effects for: %s"), *SkillData.DisplayName.ToString());
+}
+
+void USkillTreeComponent::RemoveSkillEffects(const FSkillNodeData& SkillData)
+{
+    // This is where you would remove skill effects from the character
+    // For now, we just log it
+    UE_LOG(LogTemp, Log, TEXT("Removed skill effects for: %s"), *SkillData.DisplayName.ToString());
+}

Source/UTAD_UI/SkillTree/SkillTreeComponent.h

@@ -0,0 +1,163 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Components/ActorComponent.h"
+#include "SkillTreeTypes.h"
+#include "SkillTreeComponent.generated.h"
+
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnSkillPointsChanged, int32, NewSkillPoints);
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnSkillPurchased, FName, SkillID);
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnSkillSelectionChanged, int32, TotalCost);
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnSkillStateChanged, FName, SkillID);
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnSelectionError, FName, SkillID, FText, ErrorMessage);
+
+UCLASS(ClassGroup=(Custom), meta=(BlueprintSpawnableComponent))
+class UTAD_UI_API USkillTreeComponent : public UActorComponent
+{
+    GENERATED_BODY()
+
+public:
+    USkillTreeComponent();
+
+protected:
+    virtual void BeginPlay() override;
+
+    // Current skill points available
+    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Skill Points", SaveGame)
+    int32 AvailableSkillPoints;
+
+    // Total skill points earned
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Points", SaveGame)
+    int32 TotalSkillPointsEarned;
+
+    // Data table containing all skill definitions
+    UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Skill Tree")
+    class UDataTable* SkillDataTable;
+
+    // All skills loaded from the data table
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Tree")
+    TMap<FName, FSkillNodeRuntime> AllSkills;
+
+    // Currently purchased skills
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Tree", SaveGame)
+    TArray<FName> PurchasedSkills;
+
+    // Currently selected skills for purchase
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Tree")
+    TArray<FName> SelectedSkills;
+
+    // Cache the total cost of selected skills
+    UPROPERTY(BlueprintReadOnly, Category = "Skill Tree")
+    int32 CurrentSelectionCost;
+
+public:
+    // Initialize the skill tree from data table
+    UFUNCTION(BlueprintCallable, Category = "Skill Tree")
+    void InitializeSkillTree();
+
+    // Skill Points Management
+    UFUNCTION(BlueprintCallable, Category = "Skill Points")
+    void AddSkillPoints(int32 Amount);
+
+    UFUNCTION(BlueprintCallable, Category = "Skill Points")
+    void RemoveSkillPoints(int32 Amount);
+
+    UFUNCTION(BlueprintPure, Category = "Skill Points")
+    int32 GetAvailableSkillPoints() const { return AvailableSkillPoints; }
+
+    UFUNCTION(BlueprintPure, Category = "Skill Points")
+    int32 GetTotalSkillPointsEarned() const { return TotalSkillPointsEarned; }
+
+    // Selection Management
+    UFUNCTION(BlueprintCallable, Category = "Skill Selection")
+    bool SelectSkill(FName SkillID);
+
+    UFUNCTION(BlueprintCallable, Category = "Skill Selection")
+    bool DeselectSkill(FName SkillID);
+
+    UFUNCTION(BlueprintCallable, Category = "Skill Selection")
+    void ClearSelection();
+
+    UFUNCTION(BlueprintCallable, Category = "Skill Selection")
+    bool ConfirmPurchase();
+
+    UFUNCTION(BlueprintPure, Category = "Skill Selection")
+    TArray<FName> GetSelectedSkills() const { return SelectedSkills; }
+
+    UFUNCTION(BlueprintPure, Category = "Skill Selection")
+    int32 GetSelectionCost() const { return CurrentSelectionCost; }
+
+    UFUNCTION(BlueprintPure, Category = "Skill Selection")
+    bool CanAffordSelection() const { return AvailableSkillPoints >= CurrentSelectionCost; }
+
+    // Skill State Queries
+    UFUNCTION(BlueprintPure, Category = "Skill State")
+    bool IsSkillPurchased(FName SkillID) const;
+
+    UFUNCTION(BlueprintPure, Category = "Skill State")
+    bool IsSkillSelected(FName SkillID) const;
+
+    UFUNCTION(BlueprintPure, Category = "Skill State")
+    bool IsSkillAvailable(FName SkillID) const;
+
+    UFUNCTION(BlueprintPure, Category = "Skill State")
+    bool CanSelectSkill(FName SkillID, FText& OutErrorMessage) const;
+
+    UFUNCTION(BlueprintPure, Category = "Skill State")
+    ESkillNodeState GetSkillState(FName SkillID) const;
+
+    // Get skill data
+    UFUNCTION(BlueprintPure, Category = "Skill Data")
+    bool GetSkillNodeData(FName SkillID, FSkillNodeRuntime& OutNodeData) const;
+
+    UFUNCTION(BlueprintPure, Category = "Skill Data")
+    TArray<FSkillNodeRuntime> GetAllSkillNodes() const;
+
+    // Calculate total bonuses from purchased skills
+    UFUNCTION(BlueprintPure, Category = "Skill Bonuses")
+    float GetTotalHealthBonus() const;
+
+    UFUNCTION(BlueprintPure, Category = "Skill Bonuses")
+    float GetTotalDamageBonus() const;
+
+    UFUNCTION(BlueprintPure, Category = "Skill Bonuses")
+    float GetTotalSpeedBonus() const;
+
+    UFUNCTION(BlueprintPure, Category = "Skill Bonuses")
+    float GetTotalHealthBonusPercent() const;
+
+    UFUNCTION(BlueprintPure, Category = "Skill Bonuses")
+    float GetTotalDamageBonusPercent() const;
+
+    UFUNCTION(BlueprintPure, Category = "Skill Bonuses")
+    float GetTotalSpeedBonusPercent() const;
+
+    // Reset skills (for respec feature)
+    UFUNCTION(BlueprintCallable, Category = "Skill Tree")
+    void ResetAllSkills();
+
+    // Events
+    UPROPERTY(BlueprintAssignable, Category = "Skill Events")
+    FOnSkillPointsChanged OnSkillPointsChanged;
+
+    UPROPERTY(BlueprintAssignable, Category = "Skill Events")
+    FOnSkillPurchased OnSkillPurchased;
+
+    UPROPERTY(BlueprintAssignable, Category = "Skill Events")
+    FOnSkillSelectionChanged OnSkillSelectionChanged;
+
+    UPROPERTY(BlueprintAssignable, Category = "Skill Events")
+    FOnSkillStateChanged OnSkillStateChanged;
+
+    UPROPERTY(BlueprintAssignable, Category = "Skill Events")
+    FOnSelectionError OnSelectionError;
+
+private:
+    // Internal helper functions
+    void UpdateSkillStates();
+    void UpdateSelectionCost();
+    bool ArePrerequisitesMet(const FSkillNodeData& SkillData) const;
+    bool HasChildrenPurchased(FName SkillID) const;
+    void ApplySkillEffects(const FSkillNodeData& SkillData);
+    void RemoveSkillEffects(const FSkillNodeData& SkillData);
+};

Source/UTAD_UI/SkillTree/SkillTreeTypes.h

@@ -0,0 +1,104 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Engine/DataTable.h"
+#include "SkillTreeTypes.generated.h"
+
+// Enum for skill node state
+UENUM(BlueprintType)
+enum class ESkillNodeState : uint8
+{
+    Locked      UMETA(DisplayName = "Locked"),         // Can't be purchased yet (missing prerequisites)
+    Available   UMETA(DisplayName = "Available"),      // Can be purchased
+    Selected    UMETA(DisplayName = "Selected"),       // Currently selected for purchase
+    Purchased   UMETA(DisplayName = "Purchased")       // Already owned
+};
+
+// Struct for individual skill node data
+// Note: RowName in the DataTable serves as the unique SkillID
+USTRUCT(BlueprintType)
+struct FSkillNodeData : public FTableRowBase
+{
+    GENERATED_BODY()
+
+    // Display name for UI
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Skill")
+    FText DisplayName;
+
+    // Description of what the skill does
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Skill")
+    FText Description;
+
+    // Icon for the skill
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Skill")
+    class UTexture2D* Icon;
+
+    // Skill point cost
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Skill")
+    int32 Cost;
+
+    // Purchase order priority (lower = buy first, used when confirming multiple skills)
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Skill")
+    int32 PurchaseOrder;
+
+    // Prerequisites - must have these skills first (RowNames of required skills)
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Skill")
+    TArray<FName> Prerequisites;
+
+    // Effects this skill provides (actual stat bonuses)
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Effects")
+    float HealthBonus;
+
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Effects")
+    float DamageBonus;
+
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Effects")
+    float SpeedBonus;
+
+    // Percentage bonuses (multiplicative)
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Effects")
+    float HealthBonusPercent;
+
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Effects")
+    float DamageBonusPercent;
+
+    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Effects")
+    float SpeedBonusPercent;
+
+    FSkillNodeData()
+    {
+        DisplayName = FText::GetEmpty();
+        Description = FText::GetEmpty();
+        Icon = nullptr;
+        Cost = 1;
+        PurchaseOrder = 0;
+        HealthBonus = 0.0f;
+        DamageBonus = 0.0f;
+        SpeedBonus = 0.0f;
+        HealthBonusPercent = 0.0f;
+        DamageBonusPercent = 0.0f;
+        SpeedBonusPercent = 0.0f;
+    }
+};
+
+// Runtime struct for tracking skill state
+USTRUCT(BlueprintType)
+struct FSkillNodeRuntime
+{
+    GENERATED_BODY()
+
+    UPROPERTY(BlueprintReadOnly, Category = "Skill")
+    FSkillNodeData NodeData;
+
+    UPROPERTY(BlueprintReadOnly, Category = "Skill")
+    ESkillNodeState CurrentState;
+
+    UPROPERTY(BlueprintReadOnly, Category = "Skill")
+    bool bIsSelected;
+
+    FSkillNodeRuntime()
+    {
+        CurrentState = ESkillNodeState::Locked;
+        bIsSelected = false;
+    }
+};