Places one vertex per cell by solving a least-squares fit to the surface normals it intersects, which lets it reproduce sharp creases that corner-sign tables average away.
supersedescorrects · extends
classifiesspecializes · part-of
substitutes forapproximates · alternative-to
depends onrequires · validates
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correctsfixes a defect in Marching Cubescorner sign tables cannot reproduce sharp edges
References
Dual Contouring of Hermite Data — Ju, Losasso, Schaefer, Warren — 2002 · link