Related to this issue:

http://bugs.squeak.org/view.php?id=2241

Karl

On Mon, Jun 14, 2010 at 11:10 PM, Bert Freudenberg <bert at freudenbergs.de>wrote:

>
> On 14.06.2010, at 22:59, Chris Muller wrote:
>
> > Hmm, I noticed that the "fuzzy edges" only seem to be there only when
> > it's rotation is not a multiple of 90-degrees.
>
> Right.
>
> > Another observation:  That when it is exactly 0-degrees (straight up),
> > the translucent color is true, but at all other angles, it is somewhat
> > "darkened".  I'm not sure why, but there is some "shadow" logic in
> > that same method..
> >
> > Also, I don't notice any fuzzy edges on standard morphs (Polygon and
> > Rectangle), regardless of angle, just the SketchMorph like you pointed
> > out.
> >
> > Is your objection about visual-quality of those rotated sketches or
> > are you saying those fuzzy edges could affect color-testing logic in
> > eToy programs?  It sounds like you are saying the latter..
>
> The latter.
>
> - Bert -
>
>
> > It would indeed be nice if we can have our cake and eat it too..
> >
> > - Chris
> >
> >
> > 2010/6/14 Bert Freudenberg <bert at freudenbergs.de>:
> >> On 14.06.2010, at 05:28, Chris Muller wrote:
> >>
> >>> This is a little fix from Henry Johansen which, for me, improves the
> >>> rendering of rotated Morphs with respect to translucency.  Today when
> >>> Morphs are rotated they are always drawn with the Form paint rule, but
> >>> Henriks change allows Form blend for 32-bit displays.
> >>>
> >>> It seems to work, and improves the look of my applications.  You can
> >>> see the difference easily by rotating a simple RectangleMorph that is
> >>> alpha-colored..
> >>>
> >>> However, as there are certainly more-qualified experts who may wish to
> >>> comment on the subject first, I thought I would start it at the Inbox.
> >>>
> >>> - Chris
> >>
> >> Etoys depends on primary colors being preserved under rotation. It uses
> both rotation and color tests a lot.
> >>
> >> When I rotate a sketch that had not had translucency before, it would
> have none after rotating. With your patch, its edges get fuzzy:
> >>
> >>
> >>  vs
> >>
> >>
> >> So this solution is not general enough. If there was translucency
> before, it should be preserved under rotation, yes. But if there was none,
> it should not be introduced. I think there is a way to have your cake and
> eat it, too, though I'm not quite sure how atm.
> >>
> >> - Bert -
> >>
> >>
> >>
> >>
> >>
> >>
> >
>
>
>
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