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"Mengshi" <rsy### [at] gmailcom> wrote:
> Dear all,
>
> I want to use the POV-RAY with LIDAR dara. The format of Lidar data could be
> ascii file (txt,csv), or las/laz,all including X,Y,Z.
> So do you have any recommend tools for transforming xyz data into .pov format??
>
>
> Thanks a lot.
If you have access to 'sed', 'tail' and a shell (e.g. in Linux or Cygwin), you
can do this:
you@linux:~$ tail -n +2 lidar.txt | sed s/' '/', '/g | sed s/$/','/ >lidar.csv
('lidar.txt' is the file with your original lidar data.)
A file 'lidar.csv' will then be created, which can be read from a POV-Ray script
like this:
#version 3.7;
#declare NrOfPoints = 4162388;
#declare Points = array[NrOfPoints];
#fopen LidarFile "lidar.csv" read
#declare Cnt = 0;
#while (defined(LidarFile) & Cnt < NrOfPoints)
#read (LidarFile, X, Y, Z)
#declare Points[Cnt] = <X, Y, Z>;
#declare Cnt = Cnt + 1;
#end // for
#fclose LidarFile
#for (Cnt, 0, NrOfPoints-1)
#debug "\n"
#debug concat("Point no. ", str(Cnt, 0, 0), ": ")
#debug concat("<", vstr(3, Points[Cnt], ", ", 0, -1), ">")
#end // for
#debug "\n\n"
And if you have access to 'wc' you can get the number of lines in the lidar.csv
file like this:
you@linux:~$ wc --lines lidar.csv
--
Tor Olav
http://subcube.com
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