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

[Jacob Merrill]

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.
> >>>> _______________________________________________
> >>>> Bf-funboard mailing list
> >>>> Bf-funboard at blender.org
> >>>> http://lists.blender.org/mailman/listinfo/bf-funboard
> >>>>
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