3D alpha shape test

by Yi Zhang

Example of isolating tetrahedron elements within the boundary of a cube ant its inscribed sphere. The tetrahedra element edge length is around 0.5 in general. It is indicated that the higher resolution of boundary recognition is provided by alpha=0.5, close to the element edge length.

Three types of elements with alpha=0.5

Three types of elements with alpha=0.5

alpha=0.5

alpha=0.5

alpha=1

alpha=1

alpha=2

alpha=2

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