#42 Coordinates rounded to next hundreth when writing out ply file

[Anonymous]

When writing out ply files, the coordinates are written out using 6 digits maximum. If there are 4 digits before the comma, there are only two digits left for after the comma.
This is a big problem when handling grids expressed in m where the origin is often more than 1km away (due to georeferencing), as this reduces the resolution to cm.
At least 3 (ideally 4) digits after the comma are required.

[Anonymous]

I believe this could easily be fixed by changing line 360 in file export_ply.h (which I found on http://docs.ros.org/diamondback/api/vcglib/html/io__tetramesh_2export__ply_8h_source.html)
from
fprintf(fpout,"%g %g %g " ,vp->P()[0],vp->P()[1],vp->P()[2]);
to
fprintf(fpout,"%.4f %.4f %.4f " ,vp->P()[0],vp->P()[1],vp->P()[2]);