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I want to know what does the ConnectivityList in Delaunay triangulation in Matlab represent? Why does it have 4 columns?

ala
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  • I would assume they are index references for the 4 vertices of each tetrahedron that delaunay finds in 3D. I'm sure on of the other outputs will be a long 3 column matrix and you use that 4 column matrix to index the rows of the 3 column matrix if you want the x-y-z coords of any vertex. – Dan Jun 17 '14 at 06:24

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Looking at Matlab's delaunayTriangulation class documentation, the ConnectivityList is a triangulation connectivity list represented as a matrix. Each row of the matrix corresponds to a tetrahedron (for 3D), or a triangle (for 2D). Each element in the row is one of 4 vertex IDs of the tetrahedron (or for 2D, one of 3 vertex IDs of the triangle), a vertex ID being the row number of one of the points you provided to delaunayTriangulation().

Bull
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