fennec/planning/3D_PHYSICS.md

3D Physics (physics3d)

Table of Contents

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• 3D Physics (physics3d)
  • Table of Contents
  • Introduction
  • System Layout

Introduction

  This system will handle newtonian physics for 3D rigid and soft-bodies. This should include
articulated skeletal systems, particle physics, and soft-body physics. The following soft-body systems
will be supported with the associated implementation; elastics with finite element simulation, cloth
physics with position-based dynamics, oceans with iWave, 3D fluid dynamics with smoothed-particle
hydrodynamics, 2D surface fluid dynamics with force-based dynamics.

System Layout

• Rigid Body Physics
  • Newtonian Physics and Collision Resolution
  • Articulated Skeletal Systems
    • Inverse Kinematics
    • Stiff Rods

• Particle Physics

• Soft Body Physics
  • Elastics → Finite Element Simulation
  • Cloth → Position-Based Dynamics
  • Water

    • Oceans → iWave

      • Reasoning: iWave provides interactive lightweight fluid dynamics suitable for flat planes of water.
        
        

    • 3D Fluid Dynamics → Smoothed-Particle Hydrodynamics

      • Reasoning: This is the simplest method for simulating 3D bodies of water. This should exclusively be used for small scale simulations where self-interactive fluids are necessary. I.E. pouring water into a glass.
        
        

    • 2D Surface Fluid Dynamics → Force-Based Dynamics

      • Reasoning: This model, like iWave, provides lightweight interactive fluid dynamics, but is more easily adapted to flowing surfaces such as streams and rivers.