[[http://mi.eng.cam.ac.uk/~gmt11/software/isosurf/isosurf.html|Isosurf]] is a command line program that generates :::triangulated surfaces from cross-sections:::. Typically this approach is used for generating 3D models from [[http://en.wikipedia.org/wiki/Mri|MRI]] data. Generally it can be used for generating typographically complex shapes. At the core of the surface generation is a cross-section interpolation and a surface triangulation algorithm ([[http://en.wikipedia.org/wiki/Marching_cubes|marching cube]], [[http://en.wikipedia.org/wiki/Marching_Tetrahedrons|marching tetrahedrons]]).

This :::usage example::: thresholds pixels values between 60 and 255 in 350 400x400 grayscale images from the out.bin file. It offsets each cross-section by 10 and stores the final result as a VRML file called //surface.wrl//.

<code bash>
isosurf -t 60,255 -i out.bin -d 400,400,350 -s 1,1,10 -r 6 -v
</code>

The input ::::file format:::: is a series of [[concatenate images|concatenated]] grayscale image files. The format is headerless and stores the pixel date in a series of unsigned bytes. This is equivalent to the ::Photoshop Raw:: format or images saved with [[opengl raw image|this c/opengl function]].

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