[vtkusers] How to set a camera's azimuth and elevation?

[Hua-Mei Chen]

Amy,

     Thank you for your response. But SetRoll() is used to set the roll 
angle to a specific angle while Roll() is used to rotate the camera about 
the z-axis by the specified one. Once the camera is rotated, I am looking 
for a way to restore the camera's "original" position. That is, I want to 
set the roll, azimuth and elevation all to zeros.


Chen


----- Original Message ----- 
From: "Amy Squillacote" <ahs at cfdrc.com>
To: "Hua-Mei Chen" <huameichen0523 at gmail.com>
Cc: <vtkusers at vtk.org>
Sent: Tuesday, September 30, 2008 3:16 PM
Subject: Re: [vtkusers] How to set a camera's azimuth and elevation?


> Hi Chen,
>
> In vtkCamera, there are Roll, Azimuth, and Elevation methods that rotate 
> the camera by the angle specified. I'm not sure why there is both a Roll 
> method and a SetRoll method.
>
> - Amy
>
> Hua-Mei Chen wrote:
>>  Hi all,
>>  I am wondering how to set a camera's azimuth and elevation. There is a 
>> SetRoll() method in vtkCamera to set the roll of a camera. However, no 
>> similar methods exist for setting the azimuth and elevation. Does anyone 
>> know why? And how do I achieve my goal using other methods? Thank you.
>>  Chen
>>  ----- Original Message -----
>>
>>     *From:* Anestis Koutsoudis <mailto:akoutsou at ipet.gr>
>>     *To:* vtkusers at vtk.org <mailto:vtkusers at vtk.org>
>>     *Sent:* Monday, September 29, 2008 11:03 AM
>>     *Subject:* [vtkusers] Trying to use vtkSurfaceReconstructionFilter
>>
>>     Hi Dominik,
>>
>>     Thanks for answer but the name of my vtkSurfaceReconstructionFilter
>>     instance (delaunay)might be misleading but I think thereisn't any
>>     SetAlpha parameter for the vtkSurfaceReconstructionFilter
>>
>>     Cheers
>>
>>     I have been trying to feed an instance of
>>     vtkSurfaceReconstructionFilter
>>     with a vtkPolyData that has been assigned a vtkPoints. Here is the
>>     following code.
>>     The problem is that it always returns a CUBE not an approximation
>>     even erroneous
>>     of the point cloud.
>>
>>     Any ideas on this?
>>
>>     Cheers
>>
>>     vtkPoints *points = vtkPoints::New();
>>        fp=fopen(argv[1],"r");
>>        int counter  = 0;
>>        while(!feof(fp)) { fscanf(fp,"%e,%e,%e\n", &x,&y,&z);   //
>>     Read an X,Y,Z points file 
>> points->InsertPoint(counter,x,y,z);
>>                            counter++;
>>       }
>>       fclose(fp);
>>      points->Modified();
>>       vtkPolyData *pData = vtkPolyData::New();
>>       pData->SetPoints(points);
>>       pData->Update();
>>      vtkSurfaceReconstructionFilter *delaunay =
>>     vtkSurfaceReconstructionFilter::New();
>>       delaunay->SetInput(pData);
>>       delaunay->SetSampleSpacing(0.5);
>>       delaunay->Update();
>>
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>
> -- 
> Amy Squillacote                    Phone: (256) 726-4839
> Computer Scientist                 Fax: (256) 726-4806
> CFD Research Corporation           Web: http://www.cfdrc.com
> 215 Wynn Drive, Suite 501
> Huntsville, AL  35805
>
>