[Bf-funboard] Feature request: Accessing painted brush strokes from Python

[Jacob Merrill]

here is my own script  working  for getting the UV -
http://www.pasteall.org/65293/python

https://www.youtube.com/watch?v=AmtwPauET-0


On Thu, Feb 25, 2016 at 3:22 AM, Lubos Lenco <lubos.lenco at gmail.com> wrote:

> Thanks Jacob, got another idea from your suggestions. I could ‘block’ the
> brush when user starts painting and simulate the strokes one by one myself.
> This will probably be slower and I am also not sure about undo system as I
> will ‘spam’ it with lots of strokes. Should do for a start though! :)
>
> > On 25 Feb 2016, at 01:09, Jacob Merrill <blueprintrandom1 at gmail.com>
> wrote:
> >
> > Don't use the stroke at all ? (make your own stroke with your own
> script?)
> >
> > I am passing my changes in the bge using the video texture module,
> (trying
> > to at least)
> >
> > I think you may be able to pass your own changes to the GPU using
> PyopenGL
> > but I don't know about
> > for the viewport/ BPY textures etc (I started in the BGE and am working
> my
> > way into BPY)
> >
> > either you pass your changes each frame, or just leave a 'stroke line' as
> > you paint that stores a list of mouseUV positions?
> >
> > Can you detect a keypress event in BPY?
> >
> > (if keypress leftMouse +(some other key) -> log stroke ?)
> >
> >
> > On Wed, Feb 24, 2016 at 3:44 PM, Lubos Lenco <lubos.lenco at gmail.com>
> wrote:
> >
> >> This would be ideal, but when painting is in progress(ie mouse is being
> >> held down and strokes are made), modals are blocked. This is reasonable
> as
> >> you don’t want to accidentally click buttons and interact with other
> stuff
> >> while painting, but in this case it makes it unable to log mouse. And
> there
> >> seems to be no way to access mouse event outside of modal.
> >>
> >>> On 25 Feb 2016, at 00:38, Jacob Merrill <blueprintrandom1 at gmail.com>
> >> wrote:
> >>>
> >>>
> >>
> http://blender.stackexchange.com/questions/13450/how-to-get-mouse-position-in-a-window-with-python
> >>>
> >>> On Wed, Feb 24, 2016 at 2:10 PM, Lubos Lenco <lubos.lenco at gmail.com>
> >> wrote:
> >>>
> >>>> Hm, how to calculate ray start since I am not able to get mouse
> >> position?
> >>>> Is there a workaround for this?
> >>>>
> >>>>> On 24 Feb 2016, at 23:00, Jacob Merrill <blueprintrandom1 at gmail.com>
> >>>> wrote:
> >>>>>
> >>>>> Bvtree, cast ray from mouse  at mesh, get hitFace and hitpoint, use
> >>>>> vertex.uv and hitpoint to get UV
> >>>>> On Feb 24, 2016 1:52 PM, "Lubos Lenco" <lubos.lenco at gmail.com>
> wrote:
> >>>>>
> >>>>>> Hello,
> >>>>>>
> >>>>>> I am looking for ability to paint to multiple paint slots at once,
> >> using
> >>>>>> the same strokes user performs but with different brush texture.
> This
> >>>> would
> >>>>>> be handy to create several textures on the fly, while the user only
> >>>> paints
> >>>>>> to single one.
> >>>>>>
> >>>>>> The easiest way that comes to mind is exposing last painted strokes
> by
> >>>>>> user. The painting to other slots can then be performed using
> >>>>>> ops.paint.image_paint() operator as usual. There should probably be
> a
> >>>>>> switch and only store strokes if it is enabled.
> >>>>>>
> >>>>>> The other way I tried was to log mouse coords and construct strokes
> >>>>>> myself, unfortunately the modals are blocked while user is painting
> >> and
> >>>> I
> >>>>>> could not find any other way to access mouse positions apart from
> >> modal
> >>>>>> events.
> >>>>>>
> >>>>>> I had a brief look around and could try to implement this, however I
> >>>> would
> >>>>>> be thankful if anyone could point me to the right direction,
> possibly
> >>>> with
> >>>>>> as much detail.
> >>>>>> _______________________________________________
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