[Bf-vfx] Normal Use Case for Masking

[Ton Roosendaal]

Hi,

Just pick quality here. Good reliable rasterizing of any random shaped polygon (with holes even) is far more important than a few percent more speed. :)

-Ton-

------------------------------------------------------------------------
Ton Roosendaal  Blender Foundation   ton at blender.org    www.blender.org
Blender Institute   Entrepotdok 57A  1018AD Amsterdam   The Netherlands

On 11 Apr, 2012, at 0:12, pete larabell wrote:

> You are correct Tom, it is only ms. As a matter of fact, in the test
> cases I made, it looks "instant" to the end user. However, since I'm a
> long time graphics programmer with most of that time doing realtime
> 2d/3d, I can't help myself trying to always find faster ways to do
> everything. :)
> 
> On Tue, Apr 10, 2012 at 12:34 PM, Tom M <letterrip at gmail.com> wrote:
>> I suspect that the rasterization will be a few ms of the overall time spent,
>> and thus further optimization work won't affect overall time much.  Of
>> course I could be wrong :)
>> 
>> LetterRip
>> 
>> On Tue, Apr 10, 2012 at 10:31 AM, pete larabell <xgl.asyliax at gmail.com>
>> wrote:
>>> 
>>> Hey all,
>>> 
>>> Quick question:
>>> 
>>> In designing the rasterizer for the 2D mask editor, I see that I have
>>> a choice to make.
>>> 
>>> Option-A.) I can rasterize any polygon whatsoever with a very
>>> straightforward method. No problems. (this is how it works right now)
>>> 
>>> but...
>>> 
>>> B.) If the polygon (the mask) edges only intersect any given scan line
>>> only twice (meaning enter poly... then leave poly... never re-enter
>>> poly on this scan line) then the polygon could be rasterized at higher
>>> speed. (can be implemented now, or added later, without
>>> 
>>> so...
>>> 
>>> Here is the question:
>>> 
>>> It is worth a slight performance hit to TEST the mask for
>>> Option-B-Compliance, which if it DOES pass, makes it faster to draw,
>>> or just skip it since "most of the time" the mask will fail the
>>> Option-B-Compliance test anyway?
>>> 
>>> Not being a VFX guy I can't really judge what the typical use case is...
>>> 
>>> Any feedback would be welcome.
>>> 
>>> Cheers!
>>> Peter
>>> _______________________________________________
>>> Bf-vfx mailing list
>>> Bf-vfx at blender.org
>>> http://lists.blender.org/mailman/listinfo/bf-vfx
>> 
>> 
>> 
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