CogniGraph, Inc.

LibGen source code distributions A large collection of freely-redistributable software is provided as the LibGen source code. The distribution includes: a C preprocessing and build system (called Lib), a variety of low-level system wrapper libraries, an image library, a windowing system wrapper, mesh modeling code, terrain and texture hierarchy support (the ROAM Algorithm), atomistic simulation support (compressed I/O, visualization and analysis code), regular-grid large-scale simulation support code, and more.

ROAM homepage Realtime Optimally Adapting Meshes (popularly known as the ROAM Algorithm for terrain rendering) are designed to allow fast drawing and processing of huge geometric and imagery databases. The central ideas are the diamond data structure, which represents 4-8 mesh hierarchies, and an optimization framework based on dual priority queues. The ideas apply not just to elevation maps (terrain), but more generally to subdivision surfaces with wavelet compression of multi-resolution geometry and dependent variables like color.