[vtkusers] Ray Casters and Perspective View Rays

[Lisa S. Avila]

Hello Wes,

I don't this vtkViewRays should be added back into VTK. Instead, if you 
like the convenience of having this computed for you as it is in 
vtkViewRays you should create an image source that takes a camera and a 
desired output size and produces a vector image with the rays in it. That 
is probably of more general use that vtkViewRays and could be added into VTK.

Lisa


At 03:25 PM 1/2/2002, Turner, Wesley D (CRD) wrote:
>Lisa,
>
>Sorry for not responding sooner, but I have been off for the holidays.
>We are calculating a synthetic range image (possibly having noise) from
>the rendered image.  The ViewRays class provided a convenient API for
>quickly obtaining a matrix of data that could be used in various points
>in the generation of the range data.  While it is certainly the case that
>I can generate the same data as that returned by the ViewRays object, having
>the class simplified the code.  I do not need the data to be automatically
>generated by the Renderer, I appear to only need access to the ViewRays
>API.  Can we add it back into the VTK repository?
>
>Thanks,
>
>- Wes
>
>-----Original Message-----
>From: Lisa S. Avila [mailto:lisa.avila at kitware.com]
>Sent: Thursday, December 27, 2001 3:22 PM
>To: Turner, Wesley D (CRD); 'vtkusers at public.kitware.com'
>Cc: 'lisa.avila at kitware.com'
>Subject: Re: [vtkusers] Ray Casters and Perspective View Rays
>
>
>Hello Wes,
>
>You should be able to directly compute anything you were accessing from the
>view rays object. What specifically are you trying to determine? (I am not
>sure what you mean by "range and angle of incidence data")
>
>Lisa
>
>
>
>   At 11:12 AM 12/26/2001, Turner, Wesley D (CRD) wrote:
> >Lisa,
> >
> >In some of the code I use, there are several modules which use the
> >obsolete "vtkRayCaster" and
> >"vtkViewRays".  In particular, I use a routine which calculates
> >range and angle of incidence data based on the sequence of calls
> >vtkOpenGLRendererInstance->GetRayCaster()->GetPerspectiveViewRays().  You
> >removed these
> >modules from the VTK repository and seem to have moved their functionality
> >into other places.  Is
> >there a set of replacement calls?  Can these modules be moved
> >back into the repository?
> >
> >Thank you in advance for your help,
> >
> >- Wes Turner
> >
> >
> >
> >  <<Turner, Wesley D (CRD).vcf>>
> >
> >
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