From Ohm

Contour Tracing

Main disadvantage of iso surface extraction: For each iso value all tetrahedra need to be visited, although the iso surface does only intersect a small fraction of those. Visiting all cells does not allow interactive change of the iso value.

Based on the assumption that iso surfaces are continuous (water-tight) the contour tracing method accelerates the standard iso surface extraction, by only touching those cell that are actually cut by the iso surface:

Find a cell which intersects the iso surface

Further acceleration of the intersection test by MIN/MAX-Test:

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Page last modified on November 15, 2013, at 12:45 PM