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

[Jacob Merrill]

Note this is BGE python so all the commands are slightly different *

On Thu, Feb 25, 2016 at 5:48 PM, Jacob Merrill <blueprintrandom1 at gmail.com>
wrote:

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