[vtkusers] vtkGlobeSource SetCurtainHeight Has No Affect

[Aashish Chaudhary]

On Sat, Nov 13, 2010 at 3:00 PM, Donny <donnyz at charter.net> wrote:

>  Sorry Aashish I forgot to reply to all.
>
>
>
> Thanks Aashish. I have attached a screenshot to visualize the problem.
> Maybe you have a better solution. I have two globe source objects. The first
> is to render a low resolution texture on a terrain patch of the whole United
> States. The second is a high resolution texture of a smaller terrain patch
> representing a small area of the United States. The curtain of the second
> source is sticking above the first source. Can I use two separate textures
> on the first globe source?
>

Not as of now (based on my memory). Said that this the feature I wanted to
have and in my todo list.


>
>
> I have made the changes to vtkGlobeSource on my local copy. I am not
> authorized as a contributor and until I am more familiar with the cvs
> submission procedure I would rather you changed it. The following are the
> changes I made:
>

FYI: VTK switched to git. (more information here
http://www.vtk.org/Wiki/VTK/Git#Topic_Stage)

>
>

>


> In the vtkGlobeSource.h file I added:
>
> vtkSetMacro(AutoCalculateCurtainHeight, int);
>
> vtkGetMacro(AutoCalculateCurtainHeight, int);
>
>
>
> int AutoCalculateCurtainHeight;
>
>
>
> And in the vtkGlobeSource.cxx file I added:
>
>             In the constructor:
>
>                         this->AutoCalculateCurtainHeight = 1;
>
>
>
>       In RequestData():
>
>                         if(this->AutoCalculateCurtainHeight)
>
>                   this->CurtainHeight = (this->EndLongitude-this
> ->StartLongitude)
>
> ·         this->Radius / 3600.0;
>
>
>
> Thanks.
>
>
>
>
>
These changes looks reasonable to me.  I will make the changes in the
repository by tomorrow.

Thanks,

>
>
> -----Original Message-----
> *From:* Aashish Chaudhary [mailto:aashish.chaudhary at kitware.com]
> *Sent:* Saturday, November 13, 2010 1:10 PM
> *To:* Donny
> *Cc:* vtkusers at vtk.org
> *Subject:* Re: [vtkusers] vtkGlobeSource SetCurtainHeight Has No Affect
>
>
>
> Hi Donny,
>
> On Sat, Nov 13, 2010 at 1:27 PM, Donny <donnyz at charter.net> wrote:
>
> I noticed that when I call SetCurtainHeight on a vtkGlobeSource object it
> has no affect. I browsed the vtkGlobeSource and discovered that in the
> RequestData function the CurtainHeight is recalculated based on the terrain
> patch. This makes the SetCurtainHeight function useless.
>
>
>
>  Can we create another function called SetAutoCalculateCurtainHeight to
> assign a new variable AutoCalculateCurtainHeight and use that variable to
> determine if the terrain patch calculation should be performed?
>
>
>
> I think this sounds reasonable. Do you want to submit a patch (or I can
> make this change).  I am assuming that for some reason default curtain
> height didn't work for you? (or something)
>
>
>
> Thanks.
>
>
>
> Donny Zimmerman
>
> donnyz at charter.net
>
>
>
>
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>
> --
> | Aashish Chaudhary
> | R&D Engineer
> | Kitware Inc.
> | www.kitware.com
>



-- 
| Aashish Chaudhary
| R&D Engineer
| Kitware Inc.
| www.kitware.com
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