# Alternatives

2009 comparison: <http://physxinfo.com/articles/?page_id=154>

Open source:

- ODE <http://stackoverflow.com/questions/27385970/clearing-the-quickfix-list-in-vim>
- Newton

Proprietary:

-   PhysX: bought by NVIDIA from a Swiss company. NVIDIA GPU acceleration.
    - 2015 Flex demo with lots of water / cloth: <https://www.youtube.com/watch?v=pfonMfP__Ks>
-   Havoc: first bought by Intel from an Irish company, then by Microsoft from Intel.
    - Has GPU support.
    - Used by Assassin's Creed (Ubisoft)
    - Havoc destruction
        - car demo 2015: https://www.youtube.com/watch?v=iiRR6DtR1z8
        - 2010 demo: https://www.youtube.com/watch?v=cIcg5eotZlY
-   https://docs.coronalabs.com/guide/physics/index.html

2D:

- <http://brm.io/matter-js/> JavaScript on browser

## Box2D

AngryBirds used Box2D physics engine which does not require even attribution, and never gave anything back to its creator (Blizzard employee):

- <http://www.geek.com/games/box2d-creator-asks-rovio-for-angry-birds-credit-at-gdc-1321779/>
- <http://www.neogaf.com/forum/showthread.php?t=472319>
- impressive chain and watch demos with RUBE (closed source) editor <https://www.youtube.com/watch?v=WqLR4dFn1qE>
- destructible terrain as in Worms:
    - https://www.youtube.com/watch?v=Qkh8PMwOgQ4
- gas internal combustion engine!!! <https://www.youtube.com/watch?v=8kZRpouZ3OQ>

## Fluids

-   https://github.com/rchoetzlein/fluids3
    - https://github.com/erwincoumans/fluids_v3
    - https://en.wikipedia.org/wiki/Smoothed-particle_hydrodynamics
    - Windows focused build, https://github.com/erwincoumans/fluids_v3/pull/2 might port it to Linux
