Pies

Pies is a constraint- and particle-based, soft-body physics engine based on the paper "Projective Dynamics: Fusing Constraint Projections for Fast Simulation", Bouaziz et. al 2014.

Current Features

• Projective dynamics solver
• Position-based dynamics solver
• Constraints
  • Fixed-Position
  • Distance
  • Tetrahedral Volume Preservation
  • Tetrahedral Strain Limiting
  • Shape matching
  • Goal matching
  • Collision constraints
  • Friction
• Dynamic Collisions
  • Per-iteration collision detection using spatial hash (implemented on top of the parallel hashmap library)
    • Parallelized spatial hash construction
    • Parallelized collision detection
  • Triangle-Triangle continuous collision detection.
  • Node-Node collision detection / resolution

Integrations

Pies has been integrated successfully in two places so far, check out the linked repositories for more information:

• Pies was originally prototyped and tested with the Pies for Althea test application built on top of the Althea rendering engine.
• Pies has since been integrated into Autodesk Maya with the Pies for Maya plugin.

Pies for Maya

• Pies for Maya Repository

Pies for Althea

• Pies for Althea Repository

Original Prototype (Old)

Projective Dynamics

Position-Based Dynamics