[Bf-blender-npr] BF Development Fund project on Freestyle and NPR

[Tamito KAJIYAMA]

Hi Vicente,

The reuse of computed view maps you described is exactly what I have in
mind. I believe there will be 2 phases in the development of view map
caching.

1. Implement the core of view map caching. Computed view maps will be
kept for later use.
2. Integrate the view map caching in the compositor.

In the 2nd phase, I believe the re-rendering of Freestyle line
components could be pretty dynamic. In terms of time requirements,
stroke rendering after view map calculation tends to be quite fast.
So just like other compositor nodes, any change in line style parameters
can be immediately applied to the final compositor output.

In the 1st phase, I guess we need to re-render everything, because a
question here is how to trigger the re-rendering of Freestyle lines
alone. Users may turn off the compositor, so I don't see much chance to
immediately apply parameter changes to the final output.

More careful design thoughts are due still. Comments and suggestions on
this feature are very welcome.

A vectorial pass sounds a nice idea. I would say that is a quite
feasible feature, because we already have vectorial exporters (e.g., SVG
and DXF) implemented on top of Freestyle. I am not fully sure if this
should be a pass, though. All other passes are raster images.
The question is how we integrate a vectorial pass into the pixel-based
compositor framework.

Face intersection detection is foreseen as part of future work (as
indicated in the Appendix of the project proposal). Depending on time
and funding availability, that feature could definitely be a project goal.

The source code from my Development Fund project will be available
through the Blender Git repository. See the following how-to document to
retrieve latest code updates:

http://wiki.blender.org/index.php/Dev:Doc/Tools/Git

I would very appreciate it if builders are interested in keeping their
binaries in sync with the forthcoming Freestyle and NPR development.

Regards,

-- 
KAJIYAMA, Tamito <rd6t-kjym at asahi-net.or.jp>


On 07/04/2014 09:35, Vicente wrote:
> Hi,
>
> Great news indeed!
>
> As an active user of Freestyle (and Blender of course) and part of BEER
> I would like to point a few things.
>
> Just in case this is not the same than the "View Map Caching" thing:
> Taking advantage of the refactoring process it would be great to have an
> option to re-render the Freestyle pass alone(without re-render the other
> passes). So basically All Freestyle-sensible data of the last render
> should be preserved in order to re-render FS pass with that data. In a
> first stage the process could be 100% artists driven so if we change the
> geometry or the camera and we launch the "re-render FS" we are going to
> use the last data(so, it's our problem if we change something). In a
> future implementation it could be smart and detect changes in the scene.
>
> Also about the FS pass. Instead of being a sibling of the Combined pass
> it could be a vector pass (even if we don't really have vectorial passes
> in Blender, btw implementing that would be a hell of work). Having a
> native vectorial pass of the FS pass would be terrific for Anime/Manga
> and other areas. But I assume this is hardly possible (implementing
> vector stuff, new vector editor, and a new or updated output format
> allowing both pixmap and vector all together.)
>
> +1 To the line style preview. I don't mind if it's an specific window or
> the common one, but the feature itself will be a huge help.
>
> Apparently intersections are out of the reach of these 3 months work,
> but I just wanted to mention it. It's a really important missing feature.
>
> Question. Can we access the source code? If so, What's the git command
> to get it?
>
>
> Best regards,
>
> Vicente
>
>
>
>
>
> On 06/04/14 15:19, Tamito KAJIYAMA wrote:
>> Hi there,
>>
>> Thanks to the sponsors of the Blender Foundation (BF) Development Fund,
>> a full-time job position has been granted to me for the development of
>> NPR rendering functionalities in Blender. The project duration is three
>> months from the 1st of April, 2014. The proposed work components include
>> Freestyle performance improvements in terms of time and space, better
>> artists experience in interactions with Freestyle, and more general
>> Blender development, all in view of an extensive use of Freestyle and
>> Blender NPR features in the production of the Gooseberry open film.
>>
>> Below you will find a document summarizing the project elements foreseen
>> in the upcoming months:
>>
>> http://wiki.blender.org/index.php/User:Kjym3/DevFundProject
>>
>> This project is fully aware of the ongoing BEER efforts. Discussions on
>> ideas and coding targets in the framework of the project are welcome.
>>
>> With best regards,