CGAL users discussion list

["Laurent Rineau (GeometryFactory)" <>]

Le mercredi 23 novembre 2011 13:12:39 elhassan Abdou a écrit :
> Dear All
> 
> I am a newbie in CGAL. I read the 3D surface mesh generation. I want the
> Surface_3  to read from 3D array not from Gray_level_image. Can anyone help
> me with this.

Here is the use of undocumented functions, if 'data_pointer' is the pointer 
to 
your array:

  CGAL::Image_3 image(_createImage(dimx, dimy, dimz, 1,
                                   spacing_x, spacing_y, spacing_y,
                                   1, WK_FIXED, SGN_UNSIGNED));
  ImageIO_free(image.data());
  image.set_data(dat_pointer);


The last three parameters "1, WK_FIXED, SGN_UNSIGNED" mean "unsigned char". 
Have a look at <CGAL/ImageIO.h> and src/CGALImageIO/ImageIO.cpp for the ugly 
details.

_createImage+ImageIO_free is not efficient. You can have a look at those 
functions, and copy/paste the code you need, to avoid the 
allocation/deallocation of a buffer of size dimx×dimy× dimz.

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/