As a co-founder and Director of Core Technologies at High Impact Games LLC, I directed technology decisions as well as wrote key systems on our three released titles for Sony:

Ratchet and Clank: Size Matters

Secret Agent Clank

Jak and Daxter: The Lost Frontier

My responsibilities included not only writing engine code but defining technical requirements, architecting key engine components, scheduling and delegation of related tasks

Implemented skinned animation system supporting multiple layers and blending, with time critical sections written in MIPS and VFPU assembly

Wrote our in-house rigid body physics engine with constraints, including a very fast convex polyhedron collision algorithm based on Voronoi regions.

Implemented sound engine and associated GUI tools for the sound designers, as well as a custom dictionary-based compression engine for fast loading of assets.

Wrote a custom MPEG video player for in-game movies

Wrote in-house GUI tools for sound designers .