Frustum defining in Medical Image Processing Toolbox

Hi everyone,

In the awesome 'Medical Image Proceesing Tollbox Here: http://www.mathworks.com/matlabcentral/fileexchange/41594-medical-image-processing-toolbox

they're depending on the Frustum as an already built class, the functions take as an input an object from class Frustum. But unfortunately I was not able to find this class, so I was not able to use thoses functions.

any one can help me? has anyone of used a function from this library which takes as an input an object from class 'Frustum' for example: function flag = PointInFrustum(p, frustum,varargin). How did you constract this object in the first place.

Thanks a lot. Best Regards