QuadriFlow: A Scalable and Robust Method for Quadrangulation


QuadriFlow is a scalable algorithm for generating quadrilateral surface meshes based on the Instant Field-Aligned Meshes. Our algorithm efficiently produces meshes with many fewer singularities. Singularities in quadrilateral meshes cause problems for many applications, including parametrization and rendering with Catmull-Clark subdivision surfaces. Local optimization algorithms usually produce meshes with many singularities, whereas the best algorithms tend to require non-local optimization, and therefore are slow. We propose an efficient method to minimize singularities by combining the Instant Meshes objective with a system of linear and quadratic constraints, which are enforced by solving a global minimum-cost network flow problem and local boolean satisfiability problems. We have verified the robustness and efficiency of our method on a 17791 3D objects in the wild. Our evaluation shows that the quality of the quadrangulations generated by our method is as good as, if not better than, those from other methods, achieving about four times fewer singularities than Instant Meshes.

SGP 2018 (Best Paper), Computer Graphics Forum


Input Mesh:

QuadriFlow Online Tool

  • Turn your meshes (triangle or quad) into regular quadmeshes!
  • Make sure your input obj file is a water-tight maniford, otherwise QuadriFlow might not work.
  • The resourse is limited on the server so this app runs in a single-thread queue. Please do not abuse this service.
Upload Your .obj Mesh:
Select Your Model:
Number of Faces:
Options: Sharp Preserving
Flip Removal (Very Slow)
Minimum Cost Flow (Slow)
Visualization: Input Mesh        Result Quad Mesh