Physics Simulations

An iOS app demonstrating physics simulations using Swift, SceneKit and UIKit. This project showcases various physics concepts through interactive 3D simulations.

Features

Sphere Physics Simulation

• Gravity Simulation: Three spheres with different masses falling under gravity
• Collision Physics: Objects interact with each other and the ground
• Wind Force: Toggle wind effect to see how objects react to external forces
• Mass and Bounce Properties: Each sphere has unique physical properties:
  • Red Sphere: Light (1.0 mass), High bounce (0.9)
  • Blue Sphere: Medium (2.0 mass), Medium bounce (0.7)
  • Green Sphere: Heavy (5.0 mass), Low bounce (0.3)
• Dynamic Labels: Mass labels that automatically face the camera

Wind Particle System

• Visual Wind Effect: Particle system showing wind direction and intensity
• Synchronized Physics: Wind particles appear before force application
• Customizable Properties:
  • Particle color and transparency
  • Birth rate (500 particles when active)
  • Particle velocity (12.0 units)
  • Spread angle (15 degrees)
• Smooth Transitions:
  • Particles fade in when wind is enabled
  • Clean shutdown when wind is disabled or scene is reset

Fluid Simulation

• Particle-based Fluid: 200 particles simulating fluid behavior
• Realistic Water Properties:
  • Zero-bounce particles for authentic liquid behavior
  • Optimized friction and damping for fluid-like movement
  • Particle collision and interaction
• Real-time Physics: Accurate gravity and collision detection

Scene Features

• Lighting System:
  • Ambient light for overall scene illumination
  • Directional light for shadows and depth
• Ground Plane: Static physics body with collision detection

Technical Details

Physics Properties

• Gravity: -9.8 m/s² in Y direction
• Wind Force: 5 units in positive X direction
• Ground: Static physics body with gray material
• Spheres: Dynamic physics bodies with varying properties
  • Configurable mass
  • Adjustable restitution (bounce)
  • Friction coefficient: 0.5

Demo

Installation

1. Clone the repository
2. Open Physics-Simulations.xcodeproj in Xcode
3. Build and run the project

Future Enhancements

• Add more physics forces (magnetism, custom forces)
• Implement object creation through user interaction
• Add particle system customization through UI
• Include different wind patterns
• Add temperature effects on particle behavior
• Implement wind strength controls

License

This project is available under the MIT License. See the LICENSE file for more info.