[Bf-cycles] fisheye mode

[Dalai Felinto]

Hi Benjamin,

> I was also thinking about working on a native fisheye for Blender.
Go ahead if you feel like ;) I'm planning to give git(hub?) a try. Although
the development may be short you can step in as well.

> a round border-render with the angular fisheye, so that only the maximal
circle in a square image would be rendered.
Is this for a horizontal dome? If so wouldn't be better to use a
equirectangular panorama with custom 'bottom' and 'top' angles?

I'm hesitant in have Blender supporting all types of panoramas. A quick
glance at hugin shows more than 20 panorama types.
But once we have the basic modes implemented it should be easy for any
coder to expand it.

> (Currently I'm developing a workaround to get fisheye-images:
https://github.com/Benni-chan/Blender-Fulldome-Addon/blob/master/domecam.py
 )
Small note: for non-cycles renders I recommend to use linked scenes + UVMap
nodes instead of multiple cameras. At least for me it always worked well
(and it doesn't require hugin). PM me if you are not familiar with and are
interested in this technique.

--
Dalai

2012/4/24 Benjamin Waller <benjamin at mycontact.eu>

> Hi,
>
> I was also thinking about working on a native fisheye for Blender.
> (Currently I'm developing a workaround to get fisheye-images:
> https://github.com/Benni-chan/Blender-Fulldome-Addon/blob/master/domecam.py
> )
>
> A Fisheye camera should have the following options:
> FOV (don't stop at 180°! allow the user to select large angles. I'm
> using a FOV of 220° or 240° pretty often.)
> Type: all the different types of fisheye (angular, equirectangular, etc...)
>
> nice would be a round border-render with the angular fisheye, so that
> only the maximal circle in a square image would be rendered.
> (I'm using fisheye-images for digital dome-projections. the maximal
> circle in the square image is what you can see on the dome.)
> You can find more people, who are working with fisheyes in blender on
> this forum: http://blendertarium.ottplanetarium.org/forum/
>
> Benjamin
>
> 2012/4/24 Brecht Van Lommel <brechtvanlommel at pandora.be>:
> > Hi,
> >
> > The idea was to put Panorama on the same level as
> > Orthographic/Perspective. Then below that you could have
> > Equirectangular/Fisheye/.., which can just be a cycles python
> > property. This shouldn't affect implementing fisheye though, it just
> > makes the UI look a bit nicer, you can add it regardless of that
> > change.
> >
> > Further I don't have any particular suggestions for which options to
> > add for these camera's. I think it should all fit ok in the current
> > design.
> >
> > Brecht.
> >
> > On Tue, Apr 24, 2012 at 5:38 AM, Dalai Felinto <dfelinto at gmail.com>
> wrote:
> >> Hi Brecht,
> >>
> >> In the 'use_panorama' commit you mentioned the idea of having Panorama
> as a
> >> unique camera mode for Cycles.
> >> Are there other plans in that area? After 2.63 is out I would like to
> get my
> >> hands in support for fisheye.
> >>
> >> The options I can think of: (1) FOV angle (2) mode
> [hemispherical/angular
> >> fisheye]
> >> Any objections, ideas, ... ?
> >>
> >> A quick hack hijacking the current 'use_panorama' mode can be found
> here:
> >> http://www.dalaifelinto.com/?p=389
> >>
> >> Thanks,
> >> Dalai
> >>
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> >>
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