[GRASS-user] r.out.vtk RGB / input issue

GRASS GRASS user
1

hi,

i am using v.out.vtk on grass6.3 on suse.

trying to export 2.5d rgb-maps to paraview using r.out.vtk always ends up with an error message:

According to the module's manual it should be possible to export a RGBmap + dem by using the parameters

rgbmaps=redmap,bluemap,greenmap elevation=my_dem output=result.vtk

However, the module reports that the INPUT parameter has to be provided.

trying

input=rgbmap rgbmaps=redmap,bluemap,greenmap elevation=my_dem output=result.vtk

results in the same as

input=rgbmap elevation=my_dem output=result.vtk

In both cases "result.vtk" is displayed with interpolated false colors.

How can a RGB composite created in GRASS properly be transferred and displayed in Paraview ?

Peter
--
Dr. Peter Löwe
<peter.loewe@gmx.de>

GMX FreeDSL Komplettanschluss mit DSL 6.000 Flatrate und Telefonanschluss
für nur 17,95 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02

2

Hi,
i will have a look on it.
In case this is a bug, i will fix it and provide a patch.

Best regards
Soeren

-------- Original-Nachricht --------

Datum: Wed, 17 Jun 2009 15:18:23 +0200
Von: peter.loewe@gmx.de
An: grass-user@lists.osgeo.org
Betreff: [GRASS-user] r.out.vtk RGB / input issue

hi,

i am using v.out.vtk on grass6.3 on suse.

trying to export 2.5d rgb-maps to paraview using r.out.vtk always ends up
with an error message:

According to the module's manual it should be possible to export a RGBmap
+ dem by using the parameters

rgbmaps=redmap,bluemap,greenmap elevation=my_dem output=result.vtk

However, the module reports that the INPUT parameter has to be provided.

trying

input=rgbmap rgbmaps=redmap,bluemap,greenmap elevation=my_dem
output=result.vtk

results in the same as

input=rgbmap elevation=my_dem output=result.vtk

In both cases "result.vtk" is displayed with interpolated false colors.

How can a RGB composite created in GRASS properly be transferred and
displayed in Paraview ?

Peter
--
Dr. Peter Löwe
<peter.loewe@gmx.de>

GMX FreeDSL Komplettanschluss mit DSL 6.000 Flatrate und Telefonanschluss
für nur 17,95 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

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3

Hi Soeren,

the bug/feature is also present in 6.4RC5

Best
Peter

-------- Original-Nachricht --------

Datum: Thu, 18 Jun 2009 08:57:33 +0200
Von: "Sören Gebbert" <soerengebbert@gmx.de>
An: peter.loewe@gmx.de, grass-user@lists.osgeo.org
Betreff: Re: [GRASS-user] r.out.vtk RGB / input issue

Hi,
i will have a look on it.
In case this is a bug, i will fix it and provide a patch.

Best regards
Soeren

-------- Original-Nachricht --------
> Datum: Wed, 17 Jun 2009 15:18:23 +0200
> Von: peter.loewe@gmx.de
> An: grass-user@lists.osgeo.org
> Betreff: [GRASS-user] r.out.vtk RGB / input issue

> hi,
>
> i am using v.out.vtk on grass6.3 on suse.
>
> trying to export 2.5d rgb-maps to paraview using r.out.vtk always ends
up
> with an error message:
>
> According to the module's manual it should be possible to export a
RGBmap
> + dem by using the parameters
>
> rgbmaps=redmap,bluemap,greenmap elevation=my_dem output=result.vtk
>
> However, the module reports that the INPUT parameter has to be provided.
>
> trying
>
> input=rgbmap rgbmaps=redmap,bluemap,greenmap elevation=my_dem
> output=result.vtk
>
> results in the same as
>
> input=rgbmap elevation=my_dem output=result.vtk
>
> In both cases "result.vtk" is displayed with interpolated false colors.
>
> How can a RGB composite created in GRASS properly be transferred and
> displayed in Paraview ?
>
> Peter
> --
> Dr. Peter Löwe
> <peter.loewe@gmx.de>
>
>
>
>
>
> GMX FreeDSL Komplettanschluss mit DSL 6.000 Flatrate und
Telefonanschluss
> für nur 17,95 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02
> _______________________________________________
> grass-user mailing list
> grass-user@lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user

--
GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

--
Dr. Peter Löwe
<peter.loewe@gmx.de>

GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

4

Hello Peter,
i have checked this issue.
The behavior of r.out.vtk is correct.

An input must be provided, this is not optional.
To change this, you have to apply this little patch:

===================================================================
--- parameters.c (Revision 37861)
+++ parameters.c (Arbeitskopie)
@@ -29,6 +29,7 @@
void set_params()
{
     param.input = G_define_standard_option(G_OPT_R_INPUTS);
+ param.input->required = NO;

If you use the rgb and the input parameter (which is the default),
then you have to choose which data has should be displayed in your visualization software. By default, the input scalars are the "active"
scalar array in the vtk output file.

e.g:
In paraview 3.x select the display tab and choose "Color by" to switch from input scalars to rgb scalars.

Best regards
Soeren

-------- Original-Nachricht --------

Datum: Wed, 17 Jun 2009 15:18:23 +0200
Von: peter.loewe@gmx.de
An: grass-user@lists.osgeo.org
Betreff: [GRASS-user] r.out.vtk RGB / input issue

hi,

i am using v.out.vtk on grass6.3 on suse.

trying to export 2.5d rgb-maps to paraview using r.out.vtk always ends up
with an error message:

According to the module's manual it should be possible to export a RGBmap
+ dem by using the parameters

rgbmaps=redmap,bluemap,greenmap elevation=my_dem output=result.vtk

However, the module reports that the INPUT parameter has to be provided.

trying

input=rgbmap rgbmaps=redmap,bluemap,greenmap elevation=my_dem
output=result.vtk

results in the same as

input=rgbmap elevation=my_dem output=result.vtk

In both cases "result.vtk" is displayed with interpolated false colors.

How can a RGB composite created in GRASS properly be transferred and
displayed in Paraview ?

Peter
--
Dr. Peter Löwe
<peter.loewe@gmx.de>

GMX FreeDSL Komplettanschluss mit DSL 6.000 Flatrate und Telefonanschluss
für nur 17,95 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

--
GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

5

Hi Sören,

thanks for your fast help - the patch works.

However, only limited success on the paraview-side (Paraview 3.4.0)

In paraview 3.x select the display tab and choose "Color by" to switch
from input scalars to rgb scalars.

This works, but results in a strangely colored image which bears little resemblance to the visualisation in GRASS with d.rgb or r.composite.

How can a similar coloring scheme be achieved in Paraview like the one for the source data in GRASS ?

Peter

-------- Original-Nachricht --------

Datum: Thu, 18 Jun 2009 13:09:58 +0200
Von: "Sören Gebbert" <soerengebbert@gmx.de>
An: peter.loewe@gmx.de, grass-user@lists.osgeo.org
Betreff: Re: [GRASS-user] r.out.vtk RGB / input issue

Hello Peter,
i have checked this issue.
The behavior of r.out.vtk is correct.

An input must be provided, this is not optional.
To change this, you have to apply this little patch:

===================================================================
--- parameters.c (Revision 37861)
+++ parameters.c (Arbeitskopie)
@@ -29,6 +29,7 @@
void set_params()
{
     param.input = G_define_standard_option(G_OPT_R_INPUTS);
+ param.input->required = NO;

If you use the rgb and the input parameter (which is the default),
then you have to choose which data has should be displayed in your
visualization software. By default, the input scalars are the "active"
scalar array in the vtk output file.

e.g:
In paraview 3.x select the display tab and choose "Color by" to switch
from input scalars to rgb scalars.

Best regards
Soeren

-------- Original-Nachricht --------
> Datum: Wed, 17 Jun 2009 15:18:23 +0200
> Von: peter.loewe@gmx.de
> An: grass-user@lists.osgeo.org
> Betreff: [GRASS-user] r.out.vtk RGB / input issue

> hi,
>
> i am using v.out.vtk on grass6.3 on suse.
>
> trying to export 2.5d rgb-maps to paraview using r.out.vtk always ends
up
> with an error message:
>
> According to the module's manual it should be possible to export a
RGBmap
> + dem by using the parameters
>
> rgbmaps=redmap,bluemap,greenmap elevation=my_dem output=result.vtk
>
> However, the module reports that the INPUT parameter has to be provided.
>
> trying
>
> input=rgbmap rgbmaps=redmap,bluemap,greenmap elevation=my_dem
> output=result.vtk
>
> results in the same as
>
> input=rgbmap elevation=my_dem output=result.vtk
>
> In both cases "result.vtk" is displayed with interpolated false colors.
>
> How can a RGB composite created in GRASS properly be transferred and
> displayed in Paraview ?
>
> Peter
> --
> Dr. Peter Löwe
> <peter.loewe@gmx.de>
>
>
>
>
>
> GMX FreeDSL Komplettanschluss mit DSL 6.000 Flatrate und
Telefonanschluss
> für nur 17,95 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02
> _______________________________________________
> grass-user mailing list
> grass-user@lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user

--
GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

--
Dr. Peter Löwe
<peter.loewe@gmx.de>

GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

6

Hi Peter,
you have to disable the "Map Scalars" check button in the display tab to
avoid the use of a lookup table.

Best regards
Soeren

-------- Original-Nachricht --------

Datum: Thu, 18 Jun 2009 16:16:08 +0200
Von: "Peter Löwe" <peter.loewe@gmx.de>
An: "Sören Gebbert" <soerengebbert@gmx.de>, grass-user@lists.osgeo.org
Betreff: Re: [GRASS-user] r.out.vtk RGB / input issue

Hi Sören,

thanks for your fast help - the patch works.

However, only limited success on the paraview-side (Paraview 3.4.0)

> In paraview 3.x select the display tab and choose "Color by" to switch
> from input scalars to rgb scalars.

This works, but results in a strangely colored image which bears little
resemblance to the visualisation in GRASS with d.rgb or r.composite.

How can a similar coloring scheme be achieved in Paraview like the one for
the source data in GRASS ?

Peter

-------- Original-Nachricht --------
> Datum: Thu, 18 Jun 2009 13:09:58 +0200
> Von: "Sören Gebbert" <soerengebbert@gmx.de>
> An: peter.loewe@gmx.de, grass-user@lists.osgeo.org
> Betreff: Re: [GRASS-user] r.out.vtk RGB / input issue

> Hello Peter,
> i have checked this issue.
> The behavior of r.out.vtk is correct.
>
> An input must be provided, this is not optional.
> To change this, you have to apply this little patch:
>
> ===================================================================
> --- parameters.c (Revision 37861)
> +++ parameters.c (Arbeitskopie)
> @@ -29,6 +29,7 @@
> void set_params()
> {
> param.input = G_define_standard_option(G_OPT_R_INPUTS);
> + param.input->required = NO;
>
>
>
> If you use the rgb and the input parameter (which is the default),
> then you have to choose which data has should be displayed in your
> visualization software. By default, the input scalars are the "active"
> scalar array in the vtk output file.
>
> e.g:
> In paraview 3.x select the display tab and choose "Color by" to switch
> from input scalars to rgb scalars.
>
> Best regards
> Soeren
>
> -------- Original-Nachricht --------
> > Datum: Wed, 17 Jun 2009 15:18:23 +0200
> > Von: peter.loewe@gmx.de
> > An: grass-user@lists.osgeo.org
> > Betreff: [GRASS-user] r.out.vtk RGB / input issue
>
> > hi,
> >
> > i am using v.out.vtk on grass6.3 on suse.
> >
> > trying to export 2.5d rgb-maps to paraview using r.out.vtk always ends
> up
> > with an error message:
> >
> > According to the module's manual it should be possible to export a
> RGBmap
> > + dem by using the parameters
> >
> > rgbmaps=redmap,bluemap,greenmap elevation=my_dem output=result.vtk
> >
> > However, the module reports that the INPUT parameter has to be
provided.
> >
> > trying
> >
> > input=rgbmap rgbmaps=redmap,bluemap,greenmap elevation=my_dem
> > output=result.vtk
> >
> > results in the same as
> >
> > input=rgbmap elevation=my_dem output=result.vtk
> >
> > In both cases "result.vtk" is displayed with interpolated false
colors.
> >
> > How can a RGB composite created in GRASS properly be transferred and
> > displayed in Paraview ?
> >
> > Peter
> > --
> > Dr. Peter Löwe
> > <peter.loewe@gmx.de>
> >
> >
> >
> >
> >
> > GMX FreeDSL Komplettanschluss mit DSL 6.000 Flatrate und
> Telefonanschluss
> > für nur 17,95 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02
> > _______________________________________________
> > grass-user mailing list
> > grass-user@lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/grass-user
>
> --
> GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
> Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

--
Dr. Peter Löwe
<peter.loewe@gmx.de>

GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

--
GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01