Sigurimesh

Sigurimesh is a term used in computer graphics to describe a class of polygon meshes designed to provide stable topology under subdivision and edits while preserving per-vertex and per-face attributes. It is not a formal standard, but a concept that appears in academic coursework, tutorials, and some open-source projects as a practical mesh representation.

In common usage, a sigurimesh employs a connectivity model such as half-edge or a similar structure to store vertex, edge, and face relations, supplemented by attributes like normals, texture coordinates, colors, and feature tags. The design emphasizes enabling robust subdivision, decimation, smoothing, and remeshing operations without excessive topological changes that would disrupt attributes or sharp features.

Typical operations include feature-preserving subdivision, edge collapses for simplification, and constraint-based smoothing. Implementations may vary, and there is no single reference implementation, but the approach is often contrasted with purely surface-based representations to emphasize editability and query efficiency.

Applications of sigurimesh span 3D modeling, character creation, procedural content generation, and research in mesh processing. Compatibility with standard formats (OBJ, PLY, etc.) depends on the individual implementation, as sigurimesh refers more to a workflow and data layout than a universal file format.

See also: polygon mesh, subdivision surface, half-edge data structure, mesh decimation.