Why it matters

Delaunay is fundamental geometry. Understanding shapes spatial computing.

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The architecture

Empty circumcircle property.

Incremental construction.

Sweep or D&C or randomized.

Delaunay + Voronoi dualityPointsinputDelaunay triempty circumcircleVoronoi dualadjacent regionsFortune's O(n log n) sweep constructs Voronoi (dual gives Delaunay)
Delaunay.
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How it works end to end

Bowyer-Watson incremental.

Fortune's sweep O(n log n).

Applications: FEM, GIS, graphics.