From Ohm

Iso Surfaces

Analogue to iso contour lines in 2D, we talk about iso surfaces in 3D.

An iso contour line is the set of points on a plane with the same iso value.
An iso surface is the set of points of a volume with the same iso value of the scalar function $ f(x,y,z) = const $.

Display of the implicit definition of the iso surface with $f(x,y,z) = c_{iso}$ by extracting the surface geometry explicitly:

For hexahedra: Marching Hexahedra Algorithm

For tetrahedra: Marching Tetrahedra Algorithm

Iso surface extraction:

As the surface geometry needs to be extracted explicitly from the scalar volume before the volume can be displayed, iso surface extraction is an indirect volume visualization method.

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Page last modified on November 21, 2017, at 03:10 PM