[Radiance-general] Rendering a single image with multiprocessor in Windows

[Mostapha Sadeghipour]

Hi Greg and Rob,

Thanks Greg. I did a test and it works like a charm for perspective views.
I haven't tested it for other types of views yet.

Rob, rpiece is not actually included in the recent Windows packages. I have
it there from an old release! Oops... ;)

Let me know when you are back so we can check the results. It works perfect
on my side. Maybe I should test more cases.

Mostapha



On Fri, Aug 1, 2014 at 4:52 PM, Rob Guglielmetti <rob.guglielmetti at gmail.com
> wrote:

> Hey Mo, I can share my results with you on this when I get back from
> vacation; I made a spreadsheet to calculate the views based on that code
> but as I recall I got some funky results.
>
> Also thanks for the heads up on rpiece in the windows packages, I'll make
> sure that's not included in the future! Oops...
>
> On Jul 31, 2014, at 11:59 PM, Greg Ward <gregoryjward at gmail.com> wrote:
>
> It's possible, but not at all straightforward.  You basically have to use
> the attached code (taken from rpiece) to adjust the -vh and -vv options to
> rpict, then use the -vs and -vl options to determine which part of the
> picture you want to render.
>
> Best,
> -Greg
>
> switch (ourview.type) {
>  case VT_PER:
>  pview.horiz = (2.*180./PI)*atan(
>  tan((PI/180./2.)*ourview.horiz)/hmult );
>  pview.vert = (2.*180./PI)*atan(
>  tan((PI/180./2.)*ourview.vert)/vmult );
>  break;
>  case VT_PAR:
> case VT_ANG:
>  pview.horiz = ourview.horiz / hmult;
>  pview.vert = ourview.vert / vmult;
>  break;
>  case VT_CYL:
> pview.horiz = ourview.horiz / hmult;
>  pview.vert = (2.*180./PI)*atan(
>  tan((PI/180./2.)*ourview.vert)/vmult );
>  break;
>  case VT_HEM:
>  pview.horiz = (2.*180./PI)*asin(
>  sin((PI/180./2.)*ourview.horiz)/hmult );
>  pview.vert = (2.*180./PI)*asin(
>  sin((PI/180./2.)*ourview.vert)/vmult );
>  break;
>  case VT_PLS:
> pview.horiz = sin((PI/180./2.)*ourview.horiz) /
>  (1.0 + cos((PI/180./2.)*ourview.horiz)) / hmult;
>  pview.horiz *= pview.horiz;
>  pview.horiz = (2.*180./PI)*acos((1. - pview.horiz) /
>  (1. + pview.horiz));
>  pview.vert = sin((PI/180./2.)*ourview.vert) /
>  (1.0 + cos((PI/180./2.)*ourview.vert)) / vmult;
>  pview.vert *= pview.vert;
> pview.vert = (2.*180./PI)*acos((1. - pview.vert) /
>  (1. + pview.vert));
>  break;
>  default:
>  fprintf(stderr, "%s: unknown view type '-vt%c'\n",
>  progname, ourview.type);
>  exit(cleanup(1));
>  }
>
>
> *From: *Mostapha Sadeghipour <sadeghipour at gmail.com>
>
> *Subject: *Re: [Radiance-general] Rendering a single image with
> multiprocessor in Windows
>
> *Date: *July 31, 2014 2:43:17 PM PDT
>
>
>  I just read that rpiece is not supposed to be part of the Windows
> package for some reason so I probably should change the question to is it
> possible to render a segment of a view based on -X -Y pixels?
>
> I can take care of running them in parallel and putting them back together
> separately.
>
> Thanks,
> Mostapha
>
>
> On Thu, Jul 31, 2014 at 4:28 PM, Mostapha Sadeghipour <
> sadeghipour at gmail.com> wrote:
>
>> Hi all,
>>
>> I wonder is anyone has successfully rendered a single image in parallel
>> using rpict -PP and/or rpiece in Windows.
>>
>> I have a hard time to understand both the process and the syntax.
>>
>> Thanks,
>> Mostapha
>>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.radiance-online.org/pipermail/radiance-general/attachments/20140805/16e28b94/attachment.html>