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Unity 6 Wind Simulation – Beginner Guide

🌪 Overview

Welcome to the Unity 6 Wind Simulation Project! This real-time simulation includes:

  • Streamline wind visualization with color-coded velocity & turbulence.
  • Adjustable wind properties (speed, turbulence, vortex intensity, GPU toggle).
  • Building deflection system (wind redirects around objects).
  • Real-world weather data support (via EPW files).

Designed for novices, this guide will help you set up & run the simulation in Unity 6.

📥 Installation & Setup

✅ 1. Prerequisites

  • Unity Hub with Unity 6 (6000.0.39f1 LTS) installed.
  • Universal Render Pipeline (URP) enabled.
  • Windows/Linux/macOS Build Support.

✅ 2. Creating a New Unity Project

  1. Open Unity Hub → New Project.
  2. Select "3D Sample Scene (URP)" template.
  3. Name it "Wind_Simulation" → Click Create.

✅ 3. Adding the Wind Simulation Files

  1. Download this repository.
  2. Copy Assets/, ProjectSettings/, and Packages/ into your new project folder.
  3. Open Unity (if not open) → Click Add Project → Select the folder.
  4. Wait for Unity to re-import.

🎮 Running the Simulation

🎬 1. Open the Scene

  • Project Window → Assets/Scenes/WindSimulation.unity → Double-click to open.

🎛 2. Assign the UI

  1. Find the GameObject with WindUIManager.cs (e.g. UIManagerObject).
  2. In the Inspector, set UIDocument > Source Asset to WindUI.uxml.

▶ 3. Press Play

  • The wind simulation runs in real time.
  • UI appears with sliders, toggles & buttons.

🌟 Features & Controls

🏙 Building Management

  • Add Building → Places a 40m cube as a wind obstacle.
  • Import OBJ → Loads custom building models (.obj or .fbx).

💨 Wind Controls

  • Wind Speed → Adjusts airflow velocity.
  • Turbulence → Controls random swirls.
  • Vortex Intensity → Increases eddies & rotation.
  • Height-Based Wind → Higher buildings face stronger winds.
  • GPU Compute → If supported, faster wind updates (else, CPU fallback).

🌀 Real-World Wind Data (EPW)

  • Load an .epw file → WindSpeed & Direction auto-adjust to real weather.

🛠 Additional Tools

📂 Importing OBJ/FBX Models

  • Click "Import Building Model" → Select .obj or .fbx.
  • The model loads into the scene and acts as a wind obstacle.

🔧 Auto-Generate Sample Scene (Editor-Only)

  • Unity Menu → "Tools > Create Wind Simulation Sample Scene".

🏗 How the Wind Works

🌊 Wind Lines (Streamlines)

  • Generated using Bezier curves for smooth airflow.
  • Color-coded: Blue = Slow, Red = Fast.

⛩ Building Deflection

  • Wind bends around obstacles tagged "Building".
  • Uses Physics OverlapSphere to detect structures.

⚙ GPU/CPU Performance

  • If GPU Compute is supported, it’s 10x faster.
  • If GPU isn’t available, it automatically switches to CPU.

📜 License: GPL v3

  • ✅ You can modify & share this project freely.
  • ⚠ If you distribute changes, they must remain open-source.
  • ⚠ No Warranty: Use at your own risk.

Full license: GNU GPL v3

🎯 Ready to Start? Press Play & enjoy your real-time wind simulation! 🚀