When I put in values between 15 and 20 I can see the horizontal outline of a rectangle but not the 3D shape of a box. No isosurfaces display. No crash either.
I un-commented line 684 and commented line 1009 in gvl_calc_c to see what happens to slices
/* gvl_align_data(pos, slice->data); */
A horizontal slice displays and I can manipulate it in the X and Y direction. But I cannot manipulate it in the Z direction. Also, a Z dimension slice shows up only as a line. Also, isosurfaces do not display. But there is no crash for either isosurfaces or slices when I comment out this line. On the face of it, a memory issue related to display in the Z dimension is causing a crash. Commenting out calls to gvl_align_data in gvl_calc_c stops the crash and stops display in the Z dimension. There is also something called gvl_calc2_c in this folder. Its code is very similar to gvl_calc_c
I'm guessing that Martin and Helena know the most about the relevant C code for lib/ogsf/*. Glynn may have some insight into this too. Anyone else is welcome to chime in.
FWIW, the last time gvl_calc_c was touched was by Glynn 4 years ago (glynn: Fix char/char* mismatch (merge from trunk, r32757)).
Volume display worked as recently as fall 2011 AFAIK.
Michael
____________________
C. Michael Barton
Director, Center for Social Dynamics & Complexity
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State University
voice: 480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu
On Jan 2, 2013, at 10:21 AM, Helena Mitasova <hmitaso@ncsu.edu> wrote:
On Jan 2, 2013, at 1:34 AM, Michael Barton wrote:
Testing with GRASS 6.4.3RC2
Rem-ing out line 684 in gvl_calc_c
/* gvl_align_data(dbuff[i].ndx_new, dbuff[i].new); */
prevents crashing. But I don't see an isosurface.
Helena,
I'm using your test data (jr_7408MR_2m_t70)
What is a good value to set for an isosurface to see anything?
anything between 15 to 20 should work.
You can move the volume a little bit above the surface to see the entire isosurface
Here is an example of settings that I have used (the name of the volume raster is slightly different
but it is the same data).m.nviz.image elevation_map=JR_2008_ALL -a mode=fine resolution_fine=1 color=243:243:243 volume=JR_7408MR_2m volume_shading=gouraud volume_resolution=1 volume_position=0,0,20 isosurf_level=1:17.0 isosurf_color_map=JR_7408MR_2m isosurf_transp_value=0 position=0.11,0.07 height=243 perspective=13 twist=0 zexag=6.000000 focus=569,593,17 light_position=0.26,-0.30,0.61 light_brightness=94 light_ambient=55 light_color=255:255:255 output=nviz_output format=ppm size=798,545
This volume includes no-data because the original rasters were masked, I think it would be useful to start with a volume without no-data -
just use r3.null to replace no-data with 0.Let me know if it would be useful for me to run same thing in MacOSX 10.6 (I still don't have 10.8 machine quite ready),
(see the slides 12 and 13 here for the isosurfaces at different levels, I have the isosurfaces colored by year - I don't think I gave you
that raster, so your isosurfaces should be just a single color).
http://skagit.meas.ncsu.edu/~helena/publwork/AGU2012lidar6.pptxHelena
Slices still crash because they still call gvl_align_data. As before, though initially displaying a slice works fine. It only crashes when I try to change something about the slice and it wants to redraw.
Michael
____________________
C. Michael Barton
Director, Center for Social Dynamics & Complexity
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State Universityvoice: 480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.eduOn Jan 1, 2013, at 1:24 PM, Anna Kratochvílová <kratochanna@gmail.com>
wrote:Hi Michael,
On Tue, Jan 1, 2013 at 8:48 PM, Michael Barton <Michael.Barton@asu.edu> wrote:
Hi Anna,
On the slim chance that you are online today, can you tell me where gvl_align_data in gvl_calc.c reside in either the source code or compiled code? I have a bit of down time and thought I'd see what I could find out about the volume display breaking. I don't know C but can selectively rem out some things and see what happens.
It should be here
gvl_calc.c in grass/trunk/lib/ogsf – GRASS GISAlso, you could try debugging with QtCreator [1] (as an user-friendly
interface to the debugger), it is quite easy, here [2] is some help
for setting up the project. I don't know what method you would like to
use but this is the easiest I know. I suppose it should work on Mac,
too.Regards,
Anna[1] The Qt Project
[2] Using QtCreator for GRASS C development - GRASS-WikiThanks
Michael
____________________
C. Michael Barton
Director, Center for Social Dynamics & Complexity
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State Universityvoice: 480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.eduOn Dec 6, 2012, at 12:07 AM, Anna Kratochvílová <kratochanna@gmail.com> wrote:
Hi Michael,
On Wed, Dec 5, 2012 at 11:02 PM, Michael Barton <michael.barton@asu.edu> wrote:
Any suggestions yet on where the crash I documented in
#1736 (wxNVIZ volume display crashes Mac) – GRASS GIS actually happens in the code so that
I can take a look at it and see if there is something fixable for the Mac? I
posted what I hope is the relevant debug output to help identify this.While we may need to think about wxPython 2.9, it seems best to first look
at what line is actually causing the crash and see if there is a fix or
workaround.The crash occurs probably in gvl_align_data in gvl_calc.c. The error
message 'pointer being realloc'd was not allocated' is quite clear,
however it's not clear why it happens on Mac only. Maybe someone with
better knowledge of C could understand it more.Anna
Michael
____________________
C. Michael Barton
Director, Center for Social Dynamics & Complexity
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State Universityvoice: 480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu