System Requirements Document (SRD)

Project Name: lunar-starbucks

1. Introduction

The lunar-starbucks project aims to create a premium, interactive 3D Starbucks experience accessible through web browsers. This immersive virtual coffee shop, powered by Three.js, will allow users to explore a visually stunning and interactive environment that replicates the ambiance and functionality of a real Starbucks store. The system will feature animated baristas, clickable product displays, real-time order tracking, and ambient effects to deliver a unique and engaging user experience.

This document outlines the system requirements for the lunar-starbucks project, ensuring clarity and alignment with the vision of Harsh Kumar, based in India. Locale-specific considerations, such as timezone (IST) and accessibility, have been incorporated to meet the needs of the target audience.

2. System Overview

The lunar-starbucks system will be a browser-based, interactive 3D environment designed to replicate the experience of visiting a Starbucks store. The system will leverage Three.js for rendering high-quality WebGL visuals and include features such as:

• Animated baristas preparing drinks in real-time.
• Clickable product displays for exploring menu items and details.
• Real-time order tracking visualization.
• Animated drink preparation sequences.
• Ambient coffee shop sounds and particle effects (e.g., steam).
• Smooth transitions between different store areas.
• Lighting effects to enhance the cozy and inviting atmosphere.

The system will be accessible through modern web browsers, ensuring a seamless experience across desktop and mobile devices.

3. Functional Requirements

• As a User, I should be able to navigate through a 3D Starbucks store using my browser.
• As a User, I should be able to interact with animated baristas making drinks.
• As a User, I should be able to click on product displays to view menu items and details.
• As a User, I should be able to track my order in real-time through a visual interface.
• As a User, I should experience smooth transitions when moving between store areas.
• As a User, I should see animated drink preparation sequences for my selected order.
• As a User, I should hear ambient coffee shop sounds for an immersive experience.
• As a User, I should see particle effects like steam and lighting effects for ambiance.
• As a User, I should be able to access the system through modern web browsers.

4. User Personas

4.1 Coffee Enthusiast

• Description: Regular Starbucks customers who enjoy exploring new ways to engage with the brand.
• Goals: Navigate the virtual store, explore menu items, and track orders interactively.
• Tech Proficiency: Moderate to high.

4.2 Casual Visitor

• Description: Users curious about the Starbucks experience but not necessarily regular customers.
• Goals: Explore the store environment and interact with features like animated baristas.
• Tech Proficiency: Low to moderate.

4.3 Tech-Savvy User

• Description: Users interested in cutting-edge web technologies and immersive experiences.
• Goals: Test the system’s interactivity, visuals, and performance.
• Tech Proficiency: High.

5. Visuals Colors and Theme

The lunar-starbucks project will use a unique color palette inspired by the warmth and vibrancy of a Starbucks store:

• Background: #1E1B16 (Dark Coffee Brown)
• Surface: #3E2F23 (Rich Espresso Brown)
• Text: #F5F3F0 (Cream White)
• Accent: #CBA135 (Golden Caramel)
• Muted Tones: #8C7B6E (Muted Mocha)

This palette will create a cozy, inviting atmosphere while maintaining a premium and polished aesthetic.

6. Signature Design Concept

The lunar-starbucks homepage will feature an interactive 3D coffee shop environment that feels alive and dynamic.

Key Features:

• Animated Entrance: Users will "walk" into the store through a smooth zoom-in animation, accompanied by the sound of a doorbell and ambient chatter.
• Floating Menu Cards: Menu items will appear as floating, clickable cards that rotate slightly when hovered over.
• Barista Interaction: Animated baristas will wave or nod when users approach, and clicking on them will trigger a short animation of drink preparation.
• Steam Particle Effects: Steam will rise from coffee machines and cups, dynamically changing based on user interaction.
• Lighting Transitions: The lighting will subtly shift as users move through different areas, creating a sense of depth and realism.
• Ambient Sounds: Background sounds of coffee machines, quiet chatter, and soft music will enhance immersion.
• Order Tracking Visualization: A glowing path will guide users to the order pickup area, where they can see their drink being prepared in real-time.

This design will make the lunar-starbucks experience unforgettable, blending interactivity with a premium aesthetic.

7. Non-Functional Requirements

• The system must support modern web browsers (e.g., Chrome, Firefox, Safari, Edge).
• The system must load within 5 seconds on a standard broadband connection.
• The system must maintain a frame rate of at least 30 FPS for smooth animations.
• The system must be responsive and accessible on both desktop and mobile devices.
• The system must comply with accessibility standards (e.g., WCAG 2.1).

8. Tech Stack

Frontend

• React for Web
• Three.js for 3D rendering

Backend

• Python
• FastAPI

Database

• MySQL (with Alembic for migrations)

AI Models

• GPT 5.4 for user-friendly responses

AI Tools

• Litellm for LLM Routing
• Langchain

Local Orchestration

• Docker
• docker-compose

Server-Side Orchestration

• Kubernetes

9. Assumptions and Constraints

• The system will primarily target users in India, operating in IST timezone.
• The system will require a stable internet connection for optimal performance.
• The system will not support legacy browsers (e.g., Internet Explorer).
• The system will prioritize visual fidelity over support for low-end devices.

10. Glossary

• Three.js: A JavaScript library used for creating 3D graphics in the browser.
• WebGL: A web standard for rendering 3D graphics.
• WCAG: Web Content Accessibility Guidelines, a standard for making web content accessible.
• FPS: Frames Per Second, a measure of animation smoothness.
• IST: Indian Standard Time.