That worked, thank you so much! This helps me get running in the interim while
i investigate how to use Athens.
{ jb }
On Apr 6, 2018, 9:31 AM -0400, Nicolai Hess <nicolaih...@gmail.com>, wrote:
> Hi Joe,
>
> the problem is that the BalloonCanvas (or some objects it is using) aren't
> fully reset after some drawing operations.
> (the drawString method for example sets the sourceForm as glyph to be drawn).
>
> it should work if you do not store the canvas instance, but create a new in
> every loop:
>
> points do: [ :p |
>
> canvas := form getCanvas asBalloonCanvas aaLevel:4; yourself.
>
> canvas drawPolygon: p
> color: Color transparent
> borderWidth: 1
> borderColor: Color red.
>
> canvas drawString: p first asString
> at: p first
> font: nil
> color: Color green.
> ].
>
>
>
>
> Or just reset the engine state (but I don't like this solution, the engine
> state should be private to the canvas).
>
> points do: [ :p |
>
> canvas drawPolygon: p
> color: Color transparent
> borderWidth: 1
> borderColor: Color red.
>
> canvas drawString: p first asString
> at: p first
> font: nil
> color: Color green.
> canvas resetEngine.
> ].
>
>
>
>
>
> > 2018-04-06 2:57 GMT+02:00 <j...@boremaj.net>:
> > > Hello everyone!
> > >
> > > Im trying use the balloon canvas to draw some nice smooth anti aliased
> > > lines, but now i seem to have hit upon a bug which i dont know how to fix.
> > >
> > > if i draw just lines i get everything i want. but if i add a
> > > “drawString:…” in there at any point, all the lines i try to draw
> > > subsequently dont show up.
> > >
> > > Here is code that shows the exact issue:
> > >
> > > > form := Form extent: 100@100 depth: 32.
> > > > form fillWhite.
> > > > canvas := BalloonCanvas on: form.
> > > > canvas aaLevel: 4.
> > > > "canvas := FormCanvas on: form."
> > > > points := { {10@10 . 50@43} . {50@42 . 90@75} . {90@75 . 50@90 } }.
> > > >
> > > > points do: [ :p |
> > > > canvas drawPolygon: p
> > > > color: Color transparent
> > > > borderWidth: 1
> > > > borderColor: Color red.
> > > >
> > > > canvas drawString: p first asString
> > > > at: p first
> > > > font: nil
> > > > color: Color green.
> > > > ].
> > > >
> > > > morph := ImageMorph new.
> > > > morph image: form.
> > > > morph openCenteredInWorld.
> > >
> > >
> > > if i comment out the canvas drawstring i get what you would expect: a
> > > squiggly line.
> > >
> > > if i add in the drawstring, the first line shows up but all the
> > > subsequent lines do not get drawn. (both images attached)
> > >
> > > I spent a bunch of time tracking it down to its most purest form and then
> > > a bunch of time debugging it and im out of my depth with the baloon code,
> > > i cant seem to figure out whats wrong. if anyone knows whats wrong or
> > > can give me a clue on how to fix it i’d greatly appreciate it.
> > >
> > > thanks in advance.
> > >
> > >
> > > { jb }
>
