[Bf-committers] Prospective GSOC [Harshit Mehta]

[Bastien Montagne]

Imho, 1) and 2) are already available through the vgroup option? And 
anyway, they would not be OK in modifier world IMHO, you could however 
think of a "Decimate" brush in sculpt mode, no idea how much it could be 
wanted...

3) and 5) Sounds interesting.

And we’d need to know more about that mysterious new modifier! :P

PS: do not hesitate to candidate to GSOC, even if your project is not 
yet complete, there is a period after inscriptions are closed where 
projects can be refined, they are inspected by mentors which can ask 
more precisions, etc.

Bastien

On 13/03/2014 18:34, Harshit Mehta wrote:
> Hello everyone,
>
> I am using blender since last two years. Before that I was onto Autodesk
> Maya (student version). This winter I got chance to download blender code
> and build it. I tried it on windows with MSVC9 following wiki. Since then I
> am trying to get myself familiar with source code. Recently I am also
> trying to solve few bugs. That's for my introduction. Now I turn to my main
> purpose of contributing Blender through GSOC 2014.
>
> I am writing this mail to get feedback on my ideas for proposal. I wish to
> modify decimate modifier by adding a brush facility to selectively reduce
> meshes.
>
> 1**. One could adjust brush size (part of mesh under impact) as with other
> brushes. Decimate need to be operated in edit mode then.
>
> 2**. Use of brush strength parameter -
> With lower brush strength, only edges (low cost) with lengths below certain
> threshold will get collapsed. Other low cost edges will only get shortened.
> If artist feels edge shortening doesn't affect mesh shape largely he can
> with subsequent brush applications get edge collapsed.
> So in nutshell there would be a length threshold below which edges will get
> collapsed. As brush strength increases, this threshold will also increase.
>
> 3. Symmetric reduction by specifying plane of symmetry
>   It would be useful for human body like meshes. Apply reduction on one half
> and other also gets mesh-reduced. Symmetry could also be made to be
> calculated without POS specification. This option would be manifested as a
> check-box.
>
> 4. Within current edge collapse, option could be added to replace edge with
> its midpoint instead of moving one vertex to another. Again that would be
> more useful for symmetric objects. I doubt unsubdivide would also give
> similar results. So may not be much of new addition.
>
> 5. I would love to try implementation of  hoppe's energy criterion for edge
> (to be collapsed) selection instead of cost factor (length * curvature).
> This would also take into account contributions of texture coordinates,
> border edges, and surface discontinuities and select as per lowest energy.
>
> Maybe, addition of all above features along with existing ones will create
> a lot of clutter in decimate section. I wish to completely separate brush
> implementation from existing one and add point 3,4 and 5 (ones which
> finally turn out worthy) along with current collapse, un-subdivide and
> planar.
>
> I understand what i have stated above would be much less for a typical GSOC
> project. I also have plan for adding a new modifier but am currently in
> search for its implementation techniques. As soon as I figure out
> sufficient about it, I will write back again. My purpose of writing this
> mail was only to get feedback on my ideas on decimate modifier.
>
> Thanks for going through my mail. I am wait eagerly for feedback from
> developers.
>
> Harshit Mehta
> Email: harshitmehta2293 at gmail.com
> Phone No: +918058412102
> IRC nick: Harshit22
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