About automatic disable of LoD mode when the brushes are very small

[Timothée Giet]

Yes, I agree making such setting preset-specific is probably the best 
way to go.
Looks like a big preset update is ahead ;)


Le 19/12/2015 13:50, Wolthera a écrit :
> Why not implement a similar system to our auto precision mode, so a 
> preset-specific diameter value from which we can say our brush starts 
> to benefit from Instant Preview Mode? especially because different 
> brushes and different spacing parameters mean different slowdowns.
>
> Said diameter value is measured from before size option is applied to 
> it, of course, it would otherwise be too tricky to implement :)
>
> On Sat, Dec 19, 2015 at 1:41 PM, Timothée Giet <animtim at gmail.com 
> <mailto:animtim at gmail.com>> wrote:
>
>     Ok first simple idea:
>     make the instant preview switch by default in the toolbar.
>     This way it is easy to discover and faster to use (just 1 click)
>
>     It just needs a good icon, I'll make one asap and do this if
>     everyone is ok.
>
>     This doesn't replace the idea to make an automatic-threshold
>     thing, but at least it makes it less necessary.
>
>
>     Le 19/12/2015 12:25, Raghavendra Kamath a écrit :
>>
>>     Hello,
>>
>>     The thought was to disable instant preview (LOD) when it is not
>>     required automatically , for example in small basic and less
>>     resource intensive brushes,
>>
>>     I am assuming we sort of know what parameters effect the speed of
>>     brushes e.g size above certain range or precision settings etc.
>>     So can't we trigger instant preview when the preset parameter
>>     crosses a certain threshold.
>>
>>     This is just a suggestion, there is an option to switch off the
>>     preview when not required but IMO when a person is drawing he
>>     normally just grabs a brush and paints , it will be some time to
>>     get trained to remember enabling Instant preview whenever he uses
>>     larger brushes.
>>
>>     Simply said instant preview is there to enhance user experience
>>     when the user is drawing with larger and heavy presets , so by
>>     enabling it on smaller basic brushes we are in some way doing
>>     double work by adding a preview when in fact they work smoothly
>>     without any enhancement.
>>
>>     This was my thought, any suggestion or debate is welcome.
>>
>>     On Saturday 19 Dec 2015 12:17:51 PM Dmitry Kazakov wrote:
>>
>>     > Hi, all!
>>
>>     >
>>
>>     > Yesterday on IRC Raghavendra suggested quite an interesting
>>     idea about the
>>
>>     > optimization of the Instant Preview mode. The idea sounded like
>>     that:
>>
>>     >
>>
>>     > "What if we automatically disable Instant Preview for the
>>     brushes when they
>>
>>     > are small enough to be painted without LoD, directly on the
>>     canvas. This
>>
>>     > would prevent quite a noisy flickering on the canvas, when the
>>     update it
>>
>>     > finished."
>>
>>     >
>>
>>     > I though about it. Technically, I can implement this this
>>     feature. It is
>>
>>     > possible to switch off LoD almost on the fly. But the main
>>     question is the
>>
>>     > following:
>>
>>     >
>>
>>     > "How would we decide if the brush is slow or fast?"
>>
>>     >
>>
>>     > At the moment we cannot know if the brush is slow or fast
>>     without running
>>
>>     > the stroke. And if we have already started the LoD stroke, we
>>     cannot switch
>>
>>     > it to original one seamlessly. The original stroke should start
>>     from the
>>
>>     > very beginning. So how should we know if LoD should be
>>     activated for this
>>
>>     > particular preset or not?
>>
>>     >
>>
>>     > Basically, the user already has an option to choose whether the
>>     preset
>>
>>     > should be run in LoD or not [0]. Should we do any automatic
>>     helping for him?
>>
>>     >
>>
>>     >
>>
>>     > [0] -
>>     https://userbase.kde.org/Krita/Manual/BrushEngines/InstantPreview
>>
>>     >
>>
>>     >
>>
>>     > PS:
>>
>>     > This letter is more like a heap of thoughts, so any comments
>>     are welcome! :)
>>
>>     >
>>
>>     > --
>>
>>     Raghavendra Kamath
>>
>>     Illustrator
>>
>>     9867272640
>>
>>     raghukamath.com <http://www.raghukamath.com>
>>
>>
>>
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>
>
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>
>
> -- 
> Wolthera
>
>
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