wxvtk-users

[wxVTK] about wxVTK

[f18m_217828 <f18...@ya...>]

Hi,
    I'm the admin of the MathStudio project 
(http://mathstudio.sourceforge.net) and I'd like to ask you a couple of 
things about your wxVTK project:

1) I'm a C++ wx-user since quite much time but I've never used VTK; so, 
before any other question, I need to know: VTK can be used to plot math 
data ?

2) If yes, wxVTK allows to use VTK in this sense ?

Thanks,
Francesco Montorsi

Re: [wxVTK] about wxVTK

[Mathieu M. <mma...@ny...>]

Hello Francesco,

	Welcome to the VTK world ! Once you discover you won't go back ever :).

	More seriously you cannot compare gnuplot to VTK, but VTK does a pretty 
good job at large dataset, and tons of 3d stuff. This is an abstract 
layer above OpenGL. It has wrapping for Tcl, Python, Java and even 
octave (matlab clone). The learning curve is reasonable not too steep 
but keep in mind that there is almost 1000 classes just in VTK itself 
(not counting users contrib, example, and project like paraview).

As for 2. wxVTK is only a bridge between wxWidget and VTK. So you can 
use it in your wx project and it allow you access to the full power of 
VTK. But wxVTK is pretty generic there is nothing done in particular for 
math user like you.

HTH
Mathieu

f18m_217828 wrote:
> Hi,
>    I'm the admin of the MathStudio project 
> (http://mathstudio.sourceforge.net) and I'd like to ask you a couple of 
> things about your wxVTK project:
> 
> 1) I'm a C++ wx-user since quite much time but I've never used VTK; so, 
> before any other question, I need to know: VTK can be used to plot math 
> data ?
> 
> 2) If yes, wxVTK allows to use VTK in this sense ?
> 
> Thanks,
> Francesco Montorsi
> 
> 
> 
> 
> -------------------------------------------------------
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Re: [wxVTK] about wxVTK

[f18m_217828 <f18...@ya...>]

Hi,

Mathieu Malaterre wrote:

 >     More seriously you cannot compare gnuplot to VTK, but VTK does a 
pretty good job at large dataset, and tons of 3d stuff. This is an 
abstract layer above OpenGL. It has wrapping for Tcl, Python, Java and 
even octave (matlab clone). The learning curve is reasonable not too 
steep but keep in mind that there is almost 1000 classes just in VTK 
itself (not counting users contrib, example, and project like paraview).

well, I would like to create a plotter with two main features (which are 
lacking from a lot of other packages out there):

1) user-interaction: I would like to be able to intercept user clicks on 
the plot and then perform some actions if the click was over the 
function plot, some others if user clicked over the axes and so on... I 
could not find a plot package with something like a HitTest function 
which tells me which part of the plot is tied to (x,y); can VTK do this ?

2) animated plots: I would like to be able to render flickering-free 
animating plots (imagine a parametric function plot where the user can 
see the different plots for different values of the parameter in real 
time...); I suppose VTK should have no excessive problems to do this.... 
is it ?

My program could give to VTK a dataset which it then would plot; another 
question: can I draw axes and labels with VTK ?


 > As for 2. wxVTK is only a bridge between wxWidget and VTK. So you can 
use it in your wx project and it allow you access to the full power of 
VTK. But wxVTK is pretty generic there is nothing done in particular for 
math user like you.

I'm asking you because I've been searching a good plot packages flexible 
enough to give me those two features I told you before; I've found a LOT 
of plotting packages but when you select those which are:

1) open source (gnuplot, for example, is not GPL)
2) written in c++
3) cross-platform

you'll find that the list is not so long ;-)
I thought that with some additional work in my program (basically to do 
the dataset creation) I could solve my problems with wxVTK...

Thanks a lot,
Francesco


 > f18m_217828 wrote:
 >
 >> Hi,
 >>    I'm the admin of the MathStudio project 
(http://mathstudio.sourceforge.net) and I'd like to ask you a couple of 
things about your wxVTK project:
 >>
 >> 1) I'm a C++ wx-user since quite much time but I've never used VTK; 
so, before any other question, I need to know: VTK can be used to plot 
math data ?
 >>
 >> 2) If yes, wxVTK allows to use VTK in this sense ?
 >>
 >> Thanks,
 >> Francesco Montorsi
 >>
 >>
 >>
 >>
 >> -------------------------------------------------------
 >> SF email is sponsored by - The IT Product Guide
 >> Read honest & candid reviews on hundreds of IT Products from real users.
 >> Discover which products truly live up to the hype. Start reading now.
 >> http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click
 >> _______________________________________________
 >> Wxvtk-users mailing list
 >> Wxv...@li...
 >> https://lists.sourceforge.net/lists/listinfo/wxvtk-users
 >>
 >
 >
 >
 > -------------------------------------------------------
 > This SF.Net email is sponsored by: New Crystal Reports XI.
 > Version 11 adds new functionality designed to reduce time involved in
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 > _______________________________________________
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 > https://lists.sourceforge.net/lists/listinfo/wxvtk-users
 >

Re: [wxVTK] about wxVTK

[Mathieu M. <mma...@ny...>]

Francesco,

	I'll try my best to answer this, but this looks like a question more 
appropriate to the vtkusers mailing list (remember wxVTK does not bring 
anything).

> well, I would like to create a plotter with two main features (which are 
> lacking from a lot of other packages out there):
> 
> 1) user-interaction: I would like to be able to intercept user clicks on 
> the plot and then perform some actions if the click was over the 
> function plot, some others if user clicked over the axes and so on... I 
> could not find a plot package with something like a HitTest function 
> which tells me which part of the plot is tied to (x,y); can VTK do this ?


> 2) animated plots: I would like to be able to render flickering-free 
> animating plots (imagine a parametric function plot where the user can 
> see the different plots for different values of the parameter in real 
> time...); I suppose VTK should have no excessive problems to do this.... 
> is it ?

VTK definitely support user click/interaction. You should maybe download 
paraview just for a try. Then start paraview open a dataset that comes 
with it, do a 'probe', select line from the left panel. You'll get an 
histogram you can export as CSV file. You can move it around with 2D 
mouse, and if you move the probe line you'll see that the histogram 
reflect the dataset being probe. (a nice example to probe could be 
vox8_bin.vtk).


> My program could give to VTK a dataset which it then would plot; another 
> question: can I draw axes and labels with VTK ?

Yes and yes, you can select fonts for the labels... Have a look at the 
doxygen here:

http://www.vtk.org/doc/nightly/html/classvtkXYPlotActor.html

> I'm asking you because I've been searching a good plot packages flexible 
> enough to give me those two features I told you before; I've found a LOT 
> of plotting packages but when you select those which are:
> 
> 1) open source (gnuplot, for example, is not GPL)

Be carefull here, VTK is BSD like !

> 2) written in c++

ok

> 3) cross-platform

VTK compiles on almost any plateform / compilers out there !!

> you'll find that the list is not so long ;-)
> I thought that with some additional work in my program (basically to do 
> the dataset creation) I could solve my problems with wxVTK...

Again Francesco I have to warn you, VTK is really build on top of 
OpenGL. So using VTK for simple 2D plot seems to me quite akward. Even 
if I haven't search for package as you seems to have been doing, I would 
have another look before staring learning VTK if you plan to only use 
this very subset of VTK.

Mathieu
Did you search for project on freshmeat.net, sf.net, gnu.org. I would 
also check with the gnumeric people what they use internally for 
displaying charts.

My 2 cents,
Mathieu

Re: [wxVTK] about wxVTK

[f18m_217828 <f18...@ya...>]

Hi,

>     I'll try my best to answer this, but this looks like a question more 
> appropriate to the vtkusers mailing list (remember wxVTK does not bring 
> anything).
thanks again for your help :-)

> VTK definitely support user click/interaction. 
good; I'll download paraview & give a look to it...


>> My program could give to VTK a dataset which it then would plot; 
>> another question: can I draw axes and labels with VTK ?
> Yes and yes, you can select fonts for the labels... Have a look at the 
> doxygen here:
> 
> http://www.vtk.org/doc/nightly/html/classvtkXYPlotActor.html
thanks!


>> 1) open source (gnuplot, for example, is not GPL)
> Be carefull here, VTK is BSD like !


> Again Francesco I have to warn you, VTK is really build on top of 
> OpenGL. So using VTK for simple 2D plot seems to me quite akward. Even 
> if I haven't search for package as you seems to have been doing, I would 
> have another look before staring learning VTK if you plan to only use 
> this very subset of VTK.
I forgot to put in my required-feature for a plotter the ability to plot
2D but also 3D plots; I'll give another look around but the only open
source alternative seems to be gnuplot which I don't like very much...
since I require 3D plots, OpenGL is good for me ;-)

> Did you search for project on freshmeat.net, sf.net, gnu.org. I would 
> also check with the gnumeric people what they use internally for 
> displaying charts.
I'll make another deep research but I think that plotting with VTK will
be a good occasion to learn to use it... ;-)

Thanks,
Francesco Montorsi