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'''Rubikon''' is Valve's custom [[physics]] engine used in [[Source 2]]. It replaces [[Havok]], which is the main provider of physics for [[Source]] engine games.
 
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[[File:The Rubikon Mascot.jpg|thumb|256px|Rubikon mascot used in Sergey Migdalskiy's lecture at GDC 2014.]]
 
{{Rubikon|1}} is [[Valve]]'s custom CPU based{{Cite|1}} [[physics]] engine used in {{Source 2|1}}. It replaces [[Havok]], which is the main provider of physics for {{Source|1}} engine games.
 
Valve switched from Havok to Rubikon in order to reduce licensing cost.
 
== Forks ==
{{S&box|4.1}} uses modified version of Rubikon physics engine called "Box3D", which was designed to be constantly updated.{{Cite|2}}
 
== External links ==
* Rubikon at GDC 2014 — {{youtube|1RphLzpQiJY|page = watch|Valve's Physics for Game Programmers}}.
* Document from GDC 2014 — {{link|plain|media.steampowered.com/apps/valve/2014/Sergiy_Migdalskiy_Debugging_Techniques.pdf|Sergiy Migdalskiy Debugging Techniques.pdf}} ({{Wayback|0/https://media.steampowered.com/apps/valve/2014/Sergiy_Migdalskiy_Debugging_Techniques.pdf|Archived version}}).
 
 
{{references|1=
{{ref2|cite id=1|access-date={{#time: F d, Y }}|1=Dirk Gregorius (March 10, 2015). "{{link|plain|2=pybullet.org/Bullet/phpBB3/viewtopic.php?t=10423|3=Rubikon : Valve's physics engine for Source 2}}". {{link|plain|pybullet.org/Bullet/phpBB3|Real-Time Physics Simulation Forum}}}}
{{ref2|cite id=2|access-date={{#time: F d, Y }}|gvarados (@gvarados) (August 3, 2024). "{{Twitter|gvarados/status/1819448434057007190|S&box has a new Physics Engine|icon=hide}}". ''{{twitter}}''}}
}}
 
[[Category:Physics]]

Latest revision as of 03:48, 13 October 2025

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Rubikon mascot used in Sergey Migdalskiy's lecture at GDC 2014.

Rubikon is Valve's custom CPU based[1] physics engine used in Source 2. It replaces Havok, which is the main provider of physics for Source engine games.

Valve switched from Havok to Rubikon in order to reduce licensing cost.

Forks

S&box S&box uses modified version of Rubikon physics engine called "Box3D", which was designed to be constantly updated.[2]

External links


References

References
1. Dirk Gregorius (March 10, 2015). "Rubikon : Valve's physics engine for Source 2". Real-Time Physics Simulation Forum. Retrieved on October 31, 2025.
2. gvarados (@gvarados) (August 3, 2024). "S&box has a new Physics Engine". Logo for X X (Twitter). Retrieved on October 31, 2025.
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