# Interaction System - Dubai Metaverse

## Overview

This document describes the interaction system framework for player interactions with the environment in the Dubai Metaverse project.

## System Architecture

### Base Framework

#### BP_Interactable

**Base class for all interactable objects**

### Components

1. **Interaction Component**: Handles interaction logic
2. **Prompt Component**: Shows interaction prompts
3. **Audio Component**: Interaction sounds (optional)

### Functions

#### OnInteract

- **Purpose**: Called when player interacts
- **Implementation**: Override in child classes
- **Parameters**: Interacting player

#### ShowPrompt

- **Purpose**: Show interaction prompt
- **Implementation**: Display UI prompt
- **Parameters**: Prompt text

#### HidePrompt

- **Purpose**: Hide interaction prompt
- **Implementation**: Hide UI prompt

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## Interaction Types

### Doors

#### BP_Door

**Automatic or manual doors**

### Properties

- **Door Type**: Automatic, manual, locked
- **Animation**: Open/close animation
- **Sound**: Door open/close sound
- **Lock State**: Locked/unlocked

### Implementation

1. **Open/Close**: Animate door open/close
2. **Lock System**: Lock/unlock functionality
3. **Audio**: Play door sounds
4. **State**: Track door state

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### Holograms

#### BP_Hologram

**Holographic displays**

### Properties

- **Content**: Hologram content (text, image, video)
- **Material**: Hologram material (emissive, translucent)
- **Animation**: Hologram animation
- **Interaction**: Interaction type (display, activate)

### Implementation

1. **Display**: Show hologram content
2. **Material**: Use hologram material
3. **Animation**: Animate hologram
4. **Interaction**: Handle player interaction

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### Info Panels

#### BP_InfoPanel

**Information display panels**

### Properties

- **Content**: Information content (text, images)
- **UI Widget**: Info panel UI widget
- **Display Time**: How long to display
- **Close Method**: How to close (button, timer)

### Implementation

1. **Display UI**: Show info panel UI
2. **Content**: Display information
3. **Close**: Close panel on interaction
4. **Audio**: Optional audio narration

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### Elevators

#### BP_Elevator

**Elevator stub interactions**

### Properties

- **Floors**: Available floors
- **Current Floor**: Current floor
- **Animation**: Elevator movement animation
- **UI**: Floor selection UI

### Implementation

1. **Floor Selection**: Show floor selection UI
2. **Movement**: Animate elevator movement
3. **Audio**: Elevator sounds
4. **State**: Track elevator state

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### Teleport Points

#### BP_TeleportPoint

**Fast travel/teleport system**

### Properties

- **Destination**: Teleport destination
- **Name**: Teleport point name
- **UI**: Teleport confirmation UI
- **Animation**: Teleport effect

### Implementation

1. **Interaction**: Player interacts with teleport point
2. **Confirmation**: Show confirmation UI
3. **Teleport**: Teleport player to destination
4. **Effect**: Play teleport effect

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## Player Controller

### BP_PlayerController

**Player controller for interactions**

### Components

1. **Interaction Component**: Handles interaction input
2. **Camera Component**: Player camera
3. **Movement Component**: Player movement

### Input Mapping

- **Interact**: E key / Gamepad button
- **Cancel**: ESC key / Gamepad button

### Functions

#### CheckInteractables

- **Purpose**: Check for nearby interactables
- **Implementation**: Raycast or overlap check
- **Output**: Nearest interactable

#### Interact

- **Purpose**: Interact with object
- **Implementation**: Call interactable's OnInteract
- **Parameters**: Interactable reference

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## UI System

### WBP_InteractionPrompt

**Interaction prompt widget**

### Elements

1. **Prompt Text**: "Press E to interact"
2. **Icon**: Interaction icon
3. **Object Name**: Interactable object name

### Display

- **Position**: Screen position (center or bottom)
- **Visibility**: Show when near interactable
- **Animation**: Fade in/out animation

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## Interaction Flow

### Player Approach

1. **Detection**: System detects player near interactable
2. **Prompt**: Show interaction prompt
3. **Input**: Player presses interact button
4. **Interaction**: Execute interaction
5. **Feedback**: Provide feedback (audio, visual)

### Implementation

1. **Overlap Detection**: Use overlap events
2. **Raycast Detection**: Use raycast for precise detection
3. **Distance Check**: Check distance to interactable
4. **Priority**: Handle multiple interactables (nearest first)

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## Quest Integration

### Quest System

**Optional quest system integration**

### Implementation

1. **Quest Triggers**: Interactions trigger quest events
2. **Quest Objectives**: Interactions complete objectives
3. **Quest Dialogue**: Interactions provide quest information

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## Audio Integration

### Interaction Sounds

- **Interaction Start**: Sound when interaction starts
- **Interaction Complete**: Sound when interaction completes
- **Error**: Sound for invalid interactions

### Implementation

1. **Audio Components**: Attach to interactables
2. **Sound Cues**: Create sound cues
3. **Playback**: Play sounds on interaction

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## Performance Optimization

### Interaction Optimization

1. **Update Frequency**: Optimize interaction checks
2. **Distance Culling**: Only check nearby interactables
3. **Caching**: Cache interaction results

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## Testing

### Interaction Testing

1. **Functionality**: Test all interaction types
2. **UI**: Test interaction UI
3. **Audio**: Test interaction audio
4. **Performance**: Test performance impact

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## Troubleshooting

### Common Issues

**Issue**: Interactions not working
- **Solution**: Check interaction component setup
- **Solution**: Verify input mapping

**Issue**: Prompt not showing
- **Solution**: Check prompt component
- **Solution**: Verify UI widget setup

**Issue**: Multiple interactables
- **Solution**: Implement priority system
- **Solution**: Show nearest interactable

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## Documentation

### Interaction Documentation

Document each interaction type:
- **Purpose**: What the interaction does
- **Implementation**: How it's implemented
- **Usage**: How to use it
- **Parameters**: Configurable parameters

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**Version**: 1.0
**Last Updated**: [Current Date]