added utilities planning document, first draft
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Will Stuckey
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planning/UTILITY_PLANNING.md
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692
planning/UTILITY_PLANNING.md
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# 3D Game Development Library Gameplan
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## Overview
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This document outlines a strategic plan for building a comprehensive C# library ecosystem for 3D game development in Godot. The libraries are organized by dependency hierarchy to ensure clean architecture, minimal coupling, and maximum reusability across projects.
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## Core Principles
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### 1. Dependency-Driven Development
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- **Bottom-Up Approach**: Build foundational systems first
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- **Minimal Dependencies**: Each library should depend on as few others as possible
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- **Clear Interfaces**: Libraries communicate through well-defined APIs
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- **Event-Driven Architecture**: Use events to decouple systems that need to communicate
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### 2. Quality over Speed
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- **Complete One Library Before Starting Next**: Fully implement, test, and document each library
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- **Test-Driven Development**: Create example projects for each library
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- **API Documentation**: Document public interfaces as you build
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- **Refactor When Needed**: Don't be afraid to improve APIs based on usage experience
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### 3. Real-World Validation
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- **Build Small Games**: Create tiny games to test each library combination
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- **Iterative Improvement**: Refine APIs based on actual usage
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- **Performance Monitoring**: Profile libraries in real game scenarios
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## Development Phases
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### Phase 1: Foundation Libraries (Highest Priority)
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These libraries form the bedrock of your game development ecosystem. They have minimal dependencies and provide essential functionality that nearly all other systems will use.
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#### 1.1 EinSoftworks.Input
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**Priority:** 🔴 Critical - Build First
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**Dependencies:** EinSoftworks.Utilities only
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**Estimated Timeline:** 1-2 weeks
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**Why Build First:**
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- Nearly every game system needs input handling
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- Input systems rarely depend on other game systems
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- Provides immediate value for any game project
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- Foundation for camera controls, character movement, and UI navigation
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**Core Features:**
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```csharp
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// Action-based input system
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public class InputManager : Node
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{
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// Core input queries
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public bool IsActionPressed(string action);
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public bool IsActionJustPressed(string action);
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public bool IsActionJustReleased(string action);
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public float GetActionStrength(string action);
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public Vector2 GetVector(string negativeX, string positiveX, string negativeY, string positiveY);
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// Input mapping and customization
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public void RemapAction(string action, InputEvent newEvent);
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public void SaveInputMap();
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public void LoadInputMap();
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public void ResetToDefaultInputMap();
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// Advanced features
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public bool WasActionPressedInWindow(string action, float timeWindow);
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public void SetDeadzone(string action, float deadzone);
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public InputDevice GetLastUsedDevice();
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}
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// Input buffering for precise timing
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public class InputBuffer
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{
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public void BufferInput(string action, float bufferTime);
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public bool ConsumeBufferedInput(string action);
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public void ClearBuffer();
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}
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```
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**Validation Game Ideas:**
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- Simple character that moves with WASD
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- Menu navigation system
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- Basic interaction system (press E to interact)
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#### 1.2 EinSoftworks.Events
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**Priority:** 🔴 Critical - Build Second
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**Dependencies:** EinSoftworks.Utilities only
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**Estimated Timeline:** 1 week
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**Why Build Second:**
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- Essential for decoupling systems
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- Prevents circular dependencies between libraries
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- Enables loose coupling between game systems
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- Small scope makes it quick to implement correctly
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**Core Features:**
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```csharp
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// Global event system
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public static class GameEvents
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{
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// Player events
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public static event Action<Vector3> PlayerMoved;
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public static event Action<float> PlayerHealthChanged;
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public static event Action PlayerDied;
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// Game state events
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public static event Action<string> StateChanged;
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public static event Action<string> SceneChanged;
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public static event Action GamePaused;
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public static event Action GameResumed;
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// Input events
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public static event Action<string> ActionPressed;
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public static event Action<string> ActionReleased;
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}
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// Type-safe event bus
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public class EventBus<T> where T : class
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{
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public void Subscribe(Action<T> handler);
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public void Unsubscribe(Action<T> handler);
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public void Publish(T eventData);
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public void Clear();
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}
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// Event pooling for performance
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public class PooledEvent<T> where T : class, new()
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{
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public static T Get();
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public static void Return(T item);
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}
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```
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**Validation Game Ideas:**
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- System where player movement triggers camera updates (without direct coupling)
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- Health system that updates UI without direct references
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- Scene transition system using events
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#### 1.3 EinSoftworks.StateManagement
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**Priority:** 🔴 Critical - Build Third
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**Dependencies:** EinSoftworks.Utilities, EinSoftworks.Events
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**Estimated Timeline:** 1-2 weeks
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**Why Build Third:**
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- State management is fundamental to game logic
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- Can utilize the event system for state transition notifications
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- Foundation for character AI, game flow, and UI states
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- More complex than input/events but still foundational
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**Core Features:**
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```csharp
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// Generic state machine
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public class StateMachine<T> where T : class
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{
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public T CurrentState { get; private set; }
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public T PreviousState { get; private set; }
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public void ChangeState(T newState);
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public void Update(float delta);
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public void FixedUpdate(float fixedDelta);
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// Transition system
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public void AddTransition(T from, T to, Func<bool> condition);
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public void AddAnyTransition(T to, Func<bool> condition);
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public void AddTransition(T from, T to, string triggerEvent);
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// Events
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public event Action<T, T> StateChanged; // (from, to)
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}
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// Base state class
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public abstract class State
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{
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public abstract void Enter();
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public abstract void Update(float delta);
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public abstract void FixedUpdate(float fixedDelta);
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public abstract void Exit();
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// Optional overrides
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public virtual void HandleInput() { }
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public virtual void OnDrawGizmos() { }
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}
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// Hierarchical state support
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public class HierarchicalStateMachine<T> : StateMachine<T> where T : class
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{
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public void AddSubState(T parentState, StateMachine<T> subStateMachine);
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public StateMachine<T> GetSubStateMachine(T parentState);
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}
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```
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**Validation Game Ideas:**
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- Character with idle/walking/running/jumping states
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- Game with menu/playing/paused/game-over states
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- AI enemy with patrol/chase/attack states
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### Phase 2: Core 3D Systems (High Priority)
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These libraries provide essential 3D game functionality and build upon the foundation libraries.
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#### 2.1 EinSoftworks.Physics
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**Priority:** 🟡 High
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**Dependencies:** EinSoftworks.Utilities, EinSoftworks.Events
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**Estimated Timeline:** 1-2 weeks
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**Why Build Fourth:**
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- Nearly all 3D games need physics utilities
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- Independent of complex game systems
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- Provides foundation for character controllers and interaction systems
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- Can be validated independently
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**Core Features:**
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```csharp
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// Raycast utilities
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public static class PhysicsUtils
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{
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public static bool Raycast(Vector3 origin, Vector3 direction, float maxDistance,
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uint collisionMask = uint.MaxValue);
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public static RaycastHit RaycastWithInfo(Vector3 origin, Vector3 direction, float maxDistance);
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public static RaycastHit[] RaycastAll(Vector3 origin, Vector3 direction, float maxDistance);
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// Shape casting
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public static bool SphereCast(Vector3 origin, float radius, Vector3 direction, float maxDistance);
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public static bool BoxCast(Vector3 origin, Vector3 size, Vector3 direction, float maxDistance);
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// Overlap detection
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public static Node3D[] OverlapSphere(Vector3 center, float radius, uint collisionMask);
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public static Node3D[] OverlapBox(Vector3 center, Vector3 size, uint collisionMask);
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}
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// Physics materials management
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public class PhysicsMaterialManager : Node
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{
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public void RegisterMaterial(string name, PhysicsMaterial material);
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public PhysicsMaterial GetMaterial(string name);
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public void ApplyMaterial(RigidBody3D body, string materialName);
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}
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// Trigger volume system
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public partial class TriggerVolume : Area3D
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{
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[Signal] public delegate void BodyEnteredEventHandler(Node3D body);
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[Signal] public delegate void BodyExitedEventHandler(Node3D body);
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public bool IsBodyInside(Node3D body);
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public Node3D[] GetBodiesInside();
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}
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```
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**Validation Game Ideas:**
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- Character that detects ground beneath them
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- Interaction system using raycasts
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- Trigger volumes that activate when player enters
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#### 2.2 EinSoftworks.Camera
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**Priority:** 🟡 High
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**Dependencies:** EinSoftworks.Input, EinSoftworks.Events, EinSoftworks.StateManagement
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**Estimated Timeline:** 2-3 weeks
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**Why Build Fifth:**
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- Essential for any 3D game
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- Benefits from input system for camera controls
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- Can use state management for different camera modes
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- Independent enough to develop without character systems
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**Core Features:**
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```csharp
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// Main camera controller
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public partial class CameraController : Node3D
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{
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public enum CameraMode { FirstPerson, ThirdPerson, Orbit, Fixed, Cinematic }
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[Export] public CameraMode Mode { get; set; }
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[Export] public Node3D Target { get; set; }
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[Export] public float Sensitivity { get; set; } = 1.0f;
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[Export] public bool InvertY { get; set; } = false;
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// Camera positioning
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public void SetTarget(Node3D target);
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public void SetPosition(Vector3 position, float transitionTime = 0f);
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public void SetLookAt(Vector3 lookAt, float transitionTime = 0f);
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// Camera effects
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public void Shake(float intensity, float duration);
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public void Zoom(float targetFOV, float duration);
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public void SetCameraMode(CameraMode mode, float transitionTime = 1f);
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// Collision prevention
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public void EnableCollisionAvoidance(bool enabled);
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public void SetCollisionLayers(uint layers);
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}
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// Specialized camera types
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public class FirstPersonCamera : CameraController
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{
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[Export] public float MouseSensitivity { get; set; } = 0.1f;
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[Export] public float MinPitch { get; set; } = -90f;
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[Export] public float MaxPitch { get; set; } = 90f;
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}
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public class ThirdPersonCamera : CameraController
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{
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[Export] public float Distance { get; set; } = 5f;
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[Export] public float Height { get; set; } = 2f;
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[Export] public Vector3 Offset { get; set; }
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[Export] public bool AutoRotate { get; set; } = true;
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}
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public class OrbitCamera : CameraController
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{
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[Export] public float MinDistance { get; set; } = 2f;
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[Export] public float MaxDistance { get; set; } = 10f;
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[Export] public float ZoomSpeed { get; set; } = 1f;
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}
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```
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**Validation Game Ideas:**
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- First-person camera with mouse look
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- Third-person camera that follows a moving object
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- Orbit camera for examining 3D models
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### Phase 3: Character and Interaction Systems (Medium Priority)
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These systems focus on character control and world interaction, building upon the previously established libraries.
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#### 3.1 EinSoftworks.Movement
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**Priority:** 🟡 Medium-High
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**Dependencies:** EinSoftworks.Input, EinSoftworks.Physics, EinSoftworks.StateManagement, EinSoftworks.Events
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**Estimated Timeline:** 2-4 weeks
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**Why Build Sixth:**
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- Core to most 3D games
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- Benefits from all previously built systems
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- Complex enough to require solid foundations
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- Can be thoroughly tested with camera systems
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**Core Features:**
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```csharp
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// Base character controller
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public partial class CharacterController3D : CharacterBody3D
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{
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[Export] public float Speed { get; set; } = 5f;
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[Export] public float JumpVelocity { get; set; } = 4.5f;
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[Export] public float Acceleration { get; set; } = 10f;
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[Export] public float Friction { get; set; } = 10f;
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// Ground detection
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public bool IsOnFloor();
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public bool IsOnWall();
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public bool IsOnCeiling();
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public float GetFloorAngle();
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public Vector3 GetFloorNormal();
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// Movement
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public void Move(Vector3 direction, float delta);
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public void Jump();
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public void ApplyGravity(float delta);
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// State integration
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public StateMachine<MovementState> StateMachine { get; private set; }
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}
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// Movement states
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public class IdleState : MovementState
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{
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public override void Enter() { /* Set idle animation */ }
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public override void Update(float delta) { /* Check for movement input */ }
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}
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public class WalkingState : MovementState
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{
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public override void Enter() { /* Set walking animation */ }
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public override void Update(float delta) { /* Handle movement */ }
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}
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public class JumpingState : MovementState
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{
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public override void Enter() { /* Apply jump force, set animation */ }
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public override void Update(float delta) { /* Handle air control */ }
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}
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// Specialized controllers
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public class FirstPersonController : CharacterController3D
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{
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[Export] public float MouseSensitivity { get; set; } = 0.1f;
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public Node3D Head { get; set; }
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}
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public class ThirdPersonController : CharacterController3D
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{
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[Export] public bool RotateToMovement { get; set; } = true;
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[Export] public float RotationSpeed { get; set; } = 10f;
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}
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```
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**Validation Game Ideas:**
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- First-person character with WASD movement and mouse look
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- Third-person character that rotates to movement direction
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- Platformer character with precise jumping mechanics
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#### 3.2 EinSoftworks.Interaction
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**Priority:** 🟡 Medium
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**Dependencies:** EinSoftworks.Input, EinSoftworks.Physics, EinSoftworks.Events
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**Estimated Timeline:** 1-2 weeks
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|
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**Why Build Seventh:**
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- Common need in 3D games
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- Builds naturally on physics and input systems
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- Can be developed independently of complex character systems
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- Provides immediate gameplay value
|
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|
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**Core Features:**
|
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```csharp
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// Interactable base class
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public partial class Interactable : Node3D
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{
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[Export] public string InteractionText { get; set; } = "Interact";
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[Export] public float InteractionRange { get; set; } = 2f;
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[Export] public bool RequiresLineOfSight { get; set; } = true;
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[Export] public bool OneTimeUse { get; set; } = false;
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[Signal] public delegate void InteractedEventHandler(Node3D interactor);
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[Signal] public delegate void FocusedEventHandler(Node3D interactor);
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[Signal] public delegate void UnfocusedEventHandler(Node3D interactor);
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public virtual bool CanInteract(Node3D interactor) { return true; }
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public virtual void Interact(Node3D interactor) { }
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public virtual void OnFocused(Node3D interactor) { }
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public virtual void OnUnfocused(Node3D interactor) { }
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}
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||||
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// Interaction detector
|
||||
public partial class InteractionDetector : Node3D
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{
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[Export] public float DetectionRange { get; set; } = 3f;
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[Export] public string InteractionAction { get; set; } = "interact";
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||||
|
||||
public Interactable CurrentInteractable { get; private set; }
|
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public Interactable[] GetInteractablesInRange();
|
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public void TryInteract();
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|
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[Signal] public delegate void InteractableFoundEventHandler(Interactable interactable);
|
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[Signal] public delegate void InteractableLostEventHandler(Interactable interactable);
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}
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// Specific interactable types
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||||
public class PickupItem : Interactable
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{
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[Export] public string ItemId { get; set; }
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[Export] public int Quantity { get; set; } = 1;
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[Export] public AudioStream PickupSound { get; set; }
|
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}
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||||
|
||||
public class Door : Interactable
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{
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[Export] public bool IsLocked { get; set; } = false;
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[Export] public string RequiredKey { get; set; }
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[Export] public float OpenAngle { get; set; } = 90f;
|
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[Export] public float OpenSpeed { get; set; } = 2f;
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}
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```
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**Validation Game Ideas:**
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||||
- Player that can pick up items and open doors
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- Interaction UI that shows prompts when near interactables
|
||||
- Key-door system with locked interactions
|
||||
|
||||
### Phase 4: Advanced Game Systems (Lower Priority)
|
||||
|
||||
These systems provide advanced functionality for complete games and can be built once the core systems are stable.
|
||||
|
||||
#### 4.1 EinSoftworks.SceneManagement
|
||||
**Priority:** 🟢 Medium-Low
|
||||
**Dependencies:** EinSoftworks.StateManagement, EinSoftworks.Events
|
||||
**Estimated Timeline:** 2-3 weeks
|
||||
|
||||
**Core Features:**
|
||||
```csharp
|
||||
public class SceneManager : Node
|
||||
{
|
||||
public string CurrentScene { get; private set; }
|
||||
public bool IsLoading { get; private set; }
|
||||
|
||||
public async Task LoadSceneAsync(string scenePath, bool additive = false);
|
||||
public async Task UnloadSceneAsync(string sceneName);
|
||||
public void LoadSceneWithTransition(string scenePath, SceneTransition transition);
|
||||
|
||||
[Signal] public delegate void SceneLoadStartedEventHandler(string scenePath);
|
||||
[Signal] public delegate void SceneLoadCompletedEventHandler(string scenePath);
|
||||
[Signal] public delegate void SceneUnloadedEventHandler(string sceneName);
|
||||
}
|
||||
```
|
||||
|
||||
#### 4.2 EinSoftworks.SaveSystem
|
||||
**Priority:** 🟢 Medium-Low
|
||||
**Dependencies:** EinSoftworks.StateManagement, EinSoftworks.SceneManagement
|
||||
**Estimated Timeline:** 2-3 weeks
|
||||
|
||||
**Core Features:**
|
||||
```csharp
|
||||
public class SaveManager : Node
|
||||
{
|
||||
public void SaveGame(string slotName = "default");
|
||||
public bool LoadGame(string slotName = "default");
|
||||
public void DeleteSave(string slotName);
|
||||
public string[] GetSaveSlots();
|
||||
|
||||
public void RegisterSaveable(ISaveable saveable);
|
||||
public void UnregisterSaveable(ISaveable saveable);
|
||||
}
|
||||
|
||||
public interface ISaveable
|
||||
{
|
||||
string GetSaveId();
|
||||
Dictionary<string, object> GetSaveData();
|
||||
void LoadSaveData(Dictionary<string, object> data);
|
||||
}
|
||||
```
|
||||
|
||||
#### 4.3 EinSoftworks.UI
|
||||
**Priority:** 🟢 Low
|
||||
**Dependencies:** EinSoftworks.Input, EinSoftworks.StateManagement, EinSoftworks.Events
|
||||
**Estimated Timeline:** 3-4 weeks
|
||||
|
||||
**Core Features:**
|
||||
```csharp
|
||||
public class UIManager : Control
|
||||
{
|
||||
public void ShowMenu(string menuName);
|
||||
public void HideMenu(string menuName);
|
||||
public void HideAllMenus();
|
||||
public T GetMenu<T>(string menuName) where T : Control;
|
||||
|
||||
[Signal] public delegate void MenuShownEventHandler(string menuName);
|
||||
[Signal] public delegate void MenuHiddenEventHandler(string menuName);
|
||||
}
|
||||
```
|
||||
|
||||
## Implementation Strategy
|
||||
|
||||
### Getting Started Checklist
|
||||
|
||||
**Week 1-2: EinSoftworks.Input**
|
||||
- [ ] Set up library repository structure
|
||||
- [ ] Implement basic action queries (IsActionPressed, etc.)
|
||||
- [ ] Add input mapping and saving/loading
|
||||
- [ ] Create input buffer system
|
||||
- [ ] Build validation game: Simple character movement
|
||||
- [ ] Document all public APIs
|
||||
- [ ] Test with multiple input devices
|
||||
|
||||
**Week 3: EinSoftworks.Events**
|
||||
- [ ] Implement global event system
|
||||
- [ ] Create type-safe event bus
|
||||
- [ ] Add event pooling for performance
|
||||
- [ ] Build validation game: Decoupled player-camera system
|
||||
- [ ] Document event naming conventions
|
||||
- [ ] Test event performance under load
|
||||
|
||||
**Week 4-5: EinSoftworks.StateManagement**
|
||||
- [ ] Implement generic state machine
|
||||
- [ ] Add transition system with conditions
|
||||
- [ ] Create hierarchical state support
|
||||
- [ ] Build validation game: Character with multiple states
|
||||
- [ ] Document state design patterns
|
||||
- [ ] Test state machine performance
|
||||
|
||||
**Week 6-7: EinSoftworks.Physics**
|
||||
- [ ] Implement raycast utilities
|
||||
- [ ] Add shape casting methods
|
||||
- [ ] Create trigger volume system
|
||||
- [ ] Build validation game: Ground detection system
|
||||
- [ ] Document physics best practices
|
||||
- [ ] Test physics performance
|
||||
|
||||
**Week 8-10: EinSoftworks.Camera**
|
||||
- [ ] Implement base camera controller
|
||||
- [ ] Add specialized camera types (FPS, 3rd person, orbit)
|
||||
- [ ] Create camera effects (shake, zoom)
|
||||
- [ ] Build validation game: Multiple camera modes
|
||||
- [ ] Document camera usage patterns
|
||||
- [ ] Test camera smoothness and responsiveness
|
||||
|
||||
### Quality Assurance Process
|
||||
|
||||
#### For Each Library:
|
||||
|
||||
1. **API Design Review**
|
||||
- Is the API intuitive and consistent?
|
||||
- Are there any obvious missing features?
|
||||
- Does it follow C# naming conventions?
|
||||
|
||||
2. **Dependency Check**
|
||||
- Does it only depend on earlier libraries in the plan?
|
||||
- Are there any circular dependencies?
|
||||
- Can dependencies be reduced without losing functionality?
|
||||
|
||||
3. **Performance Testing**
|
||||
- Profile the library in a realistic game scenario
|
||||
- Identify and optimize any performance bottlenecks
|
||||
- Ensure memory allocation is minimal during gameplay
|
||||
|
||||
4. **Integration Testing**
|
||||
- Build a small game that uses multiple libraries together
|
||||
- Verify that libraries work well in combination
|
||||
- Test edge cases and error conditions
|
||||
|
||||
5. **Documentation Review**
|
||||
- Are all public APIs documented?
|
||||
- Are there usage examples for complex features?
|
||||
- Is the library architecture clearly explained?
|
||||
|
||||
### Validation Games Strategy
|
||||
|
||||
Create small, focused games to test each library combination:
|
||||
|
||||
#### Foundation Tests (Weeks 1-5)
|
||||
- **Input Test**: Character that responds to all input types
|
||||
- **Event Test**: Multiple systems communicating via events
|
||||
- **State Test**: Character with idle/walk/run/jump states
|
||||
|
||||
#### Integration Tests (Weeks 6-10)
|
||||
- **Physics Test**: Character with ground detection and jumping
|
||||
- **Camera Test**: Switching between camera modes
|
||||
- **Combined Test**: Third-person character with camera following
|
||||
|
||||
#### Advanced Tests (Weeks 11+)
|
||||
- **Movement Test**: Full 3D character controller
|
||||
- **Interaction Test**: World with pickups and doors
|
||||
- **Complete Game**: Small game using all built libraries
|
||||
|
||||
### Common Pitfalls to Avoid
|
||||
|
||||
#### 1. Circular Dependencies
|
||||
```csharp
|
||||
// ❌ BAD: Camera depends on Character, Character depends on Camera
|
||||
public class Character { public Camera AttachedCamera; }
|
||||
public class Camera { public Character Target; }
|
||||
|
||||
// ✅ GOOD: Use events or generic interfaces
|
||||
public class Character { /* Publishes movement events */ }
|
||||
public class Camera { public Node3D Target; } // Subscribes to events
|
||||
```
|
||||
|
||||
#### 2. Over-Engineering Early
|
||||
```csharp
|
||||
// ❌ BAD: Complex inheritance hierarchy from the start
|
||||
public abstract class BaseMovement<T> where T : IMovementConfig { }
|
||||
|
||||
// ✅ GOOD: Start simple, refactor when needed
|
||||
public class CharacterController3D : CharacterBody3D { }
|
||||
```
|
||||
|
||||
#### 3. Feature Creep
|
||||
- Focus on core functionality first
|
||||
- Add advanced features only after core is solid
|
||||
- Each library should have a single, clear purpose
|
||||
|
||||
#### 4. Premature Optimization
|
||||
- Build it working first
|
||||
- Profile and optimize only when needed
|
||||
- Don't sacrifice clarity for minor performance gains
|
||||
|
||||
### Success Metrics
|
||||
|
||||
#### Per Library:
|
||||
- [ ] API is intuitive and well-documented
|
||||
- [ ] Zero dependencies on later libraries
|
||||
- [ ] Validation game demonstrates all major features
|
||||
- [ ] Performance is acceptable for real games
|
||||
- [ ] Code coverage > 80% through validation games
|
||||
|
||||
#### Overall Ecosystem:
|
||||
- [ ] Can build a complete 3D game using only these libraries
|
||||
- [ ] Libraries work well together without conflicts
|
||||
- [ ] Development time significantly reduced for new projects
|
||||
- [ ] Other developers can understand and use the libraries
|
||||
|
||||
## Long-Term Maintenance
|
||||
|
||||
### Versioning Strategy
|
||||
- Use semantic versioning (major.minor.patch)
|
||||
- Major version changes for breaking API changes
|
||||
- Minor version changes for new features
|
||||
- Patch version changes for bug fixes
|
||||
|
||||
### Backward Compatibility
|
||||
- Maintain backward compatibility within major versions
|
||||
- Provide migration guides for major version upgrades
|
||||
- Deprecate features before removing them
|
||||
|
||||
### Community and Documentation
|
||||
- Maintain comprehensive documentation
|
||||
- Create tutorial projects demonstrating library usage
|
||||
- Establish contribution guidelines if open-sourcing
|
||||
- Regular review and updates based on real-world usage
|
||||
Reference in New Issue
Block a user