CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 02/24/2016 12:07 PM, John Doe wrote:
> Dear All
>
> Other MAC users will likely encounter my problems.  So for
> posterity (anyone facing this)
>
>
> "CGAL developers are not involved in the creation of the macport or
> homebrew packages"
>
> Love it. It sounds like "We don't wan' yo' kind round here" :-)
> but I am thankful for the info given to me. I can see that

Not at all, it means I don't know who is making the package so I have no 
idea if the examples are distributed with the package.

> CGAL is primarly aimed for Linux.

Not at all. CGAL is using cmake. So it is compatible with linux, mac os 
and windows. Your problem was that you probably don't know how to use cmake.

Sebastien.

>  From the MAC to that first example:
>
> Thanks to info gleaned from various sources on the web
> especially David Dumas.
>
> My comments and actions are marked with ->
>
> -> Installation:
>
> -> From http://doc.cgal.org/latest/Manual/installation.html#title3
>
> sudo port install cgal
>
> sudo port install cgal +qt5 +universal +demos
>
> -> From the forum, I found out that this download applies to the MAC as
> well as Linux:
> -> I created documents/CGAL where I put CGAL-4.7.tar.gz
>
> cd Documents/CGAL
> tar xzf CGAL-4.7.tar.gz
>
> -> From http://doc.cgal.org/latest/Manual/installation.html
>
> -> My MAC already had cmake
>
> -> The following are commands I tentatively tried that were accepted:
>
> cd Documents/CGAL
> cd CGAL-4.7
>
> cmake -gui
> # Note the space before the -gui
> cmake .
> make
>
> make examples
> make demos
>
> -> Then I moved to my first example:
>
> cd examples/Convex_hull_2
>
> -> It took a lot of other people's pain to figure to compile
> -> and link the compiled code to the appropriate libraries
>
> ->
> http://stackoverflow.com/questions/8404968/compiling-a-basic-cgal-program-in-c-on-mac-os-x-10-7-2
>
> ->
> http://stackoverflow.com/questions/24395068/compiling-cgal-programs-on-mac-installed-using-macports
>
> g++ -L/opt/local/lib -lcgal -I/opt/local/include/ -lgmp
>   ch_from_cin_to_cout.cpp
>
> -> The above worked. To run the code: follow MCS 481 David Dumas
>
> ->
> http://homepages.math.uic.edu/~ddumas/teaching/2014/spring/mcs481/cgal-example/
>
> ./a.out < ch_from_cin_to_cout.cin > hull.txt
>
> -> I installed gnuplot with macports
>
> gnuplot
>
> set term png
> set output "input.png"
> set title "Points"
> set size square
> set key off
> set xrange [-1000:9000]
> set yrange [-1000:9000]
> plot "ch_from_cin_to_cout.cin" w p ps 0.25
>
> exit gnuplot
>
> cp hull.txt hull_closed.txt
> head -1 hull.txt >> hull_closed.txt
>
> gnuplot
>
> set term png
> set output "output.png"
> set title "Convex Hull"
> set size square
> set key off
> set xrange [-1000:9000]
> set yrange [-1000:9000]
> plot "ch_from_cin_to_cout.cin" w p ps 0.25, \
>       "hull_closed.txt" w p ls 3, \
>       "" w l
>
> exit gnuplot
> ====
>
> So finally I get input.png and output.png which shows the convex hull
> (convex envelope) around the data points in "ch_from_cin_to_cout.cin".
>
>
> I could use some advice w.r.t. getting Scilab to work with CGAL
> on the MAC.  Apparently this can be done.
>
> best wishes
>
> Tony