MathgeomGLS

SampleCube.vol

Binary Char Data Set 27x27x27 cube size 15x15x15, isovalue of 128

Algortihms

Marching Cubes

• Exploits a coarser Mesh then MT but produces less triangles
• no use in commercial projects. Algorithm is patented by General Electric Company
• based on "Marching Cubes: A High Resolution 3D Surface Construction Algorithm" by W.E.Lorensen and H.E.Cline

Marching Tetrahedron

• Finer Mesh
• better feature preservation
• patent free
• based on "A new tetrahedral tesselation scheme for isosurface generation" by S.L.Chan and E.O.Purisima

Lookuptables

• by Paul Bourke (http://astronomy.swin.edu.au/~pbourke)

Overall

• Simple Data Structures to store Mesh. Vertices are calculated and stored twice or even more often.

Processing steps

1. Enter size of data
2. Load data
3. Enter isovalue
4. Extract Iso Surface
5. Display

implemented by Wolf Blecher 2004. (Blechwolf@myrealbox.com)