[Bf-python] drawing callback in clip editor, problems with 'view_to_region'

[Dalai Felinto]

You are right that it works when called from an operator. But I'm trying to
make it work outside the operator, thus I need to define my own matrixes.

That said I found the fix :)
Your example did help to make me explore it further, thanks.

Basically instead of:
glOrtho(-1, 1, -1, 1, -20, 20)
(...)
coordinates = [(size, size), (-size, size), (-size, -size), ( size, -size)]

I'm now doing:
glOrtho(0, 1, 0, 1, -15, 15)
coordinates = [(size, size), (0, size), (0, 0), ( size, 0)]

Final sample file:
http://www.pasteall.org/46298/python

Cheers,
Dalai
--
blendernetwork.org/dalai-felinto
www.dalaifelinto.com


2013/10/9 CoDEmanX <codemanx at gmx.de>

> Hm your code looks quite complex, don't think you need to calculate all
> that things, this works for me:
>
> http://www.pasteall.org/46288/python
>
> view2d.view_to_region() with 0,0 and 1,1 should give you the border
> coordinates of the clip in region coordinates.
>
>
> Am 09.10.2013 09:43, schrieb Dalai Felinto:
> > Hi,
> >
> > I'm trying to write an addon where I'll need to draw a quad connecting
> > four markers.
> > For that I need to be able to map the markers coordinates to
> > 'screenspace' glVertex2f coordinates.
> >
> > I can't match the drawn shape with the image though.
> > This is a test drawing a quad that was suppose to match the image 1:1
> >
> > http://www.pasteall.org/pic/show.php?id=60483
> > Not only there is an 'offset', but the offset changes if I pan around
> > the region.
> >
> > Here is a sample script with the bare minimum to illustrate the problem:
> > http://www.pasteall.org/46273/python
> > (draw_rectangle is where the transformation is happening).
> >
> > If anyone has any suggestion it would be much appreciated.
> > Thanks,
> > Dalai
> >
> >
> >
> >
> > --
> > blendernetwork.org/dalai-felinto <
> http://blendernetwork.org/dalai-felinto>
> > www.dalaifelinto.com <http://www.dalaifelinto.com>
> >
> >
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