Re: [Pharo-users] Athens and ellipse drawing

[Juraj Kubelka]

El 11-04-2014, a las 20:56, Igor Stasenko <siguc...@gmail.com> escribió: On 12 April 2014 01:37, Juraj Kubelka <juraj.kube...@gmail.com> wrote: Thank you Igor, I suspect there is no better solution. But anyway I am surprised, every simple drawing application manages ellipses.    Athens is not an application, it is framework. And why you think that every framework supports drawing ellipses as a basic command/primitive..for instance? I know of at least one, which doesn't - try drawing it with OpenGL. ;) There is an example where it looks as I expect. The strike has the same width along the entire length.  It is Cairo. So I think it is possible. I have tried to write equivalent code for ellipse in Smalltalk, but I have not succeeded.  Image from the page: My image: Thanks for any help, Juraj   Thank you anyway.  Juraj El 11-04-2014, a las 17:35, Igor Stasenko <siguc...@gmail.com> escribió: yes, you using stroke for 2nd ellipse, but stroke width is also subject of scaling, that's why it has different width, because of non-uniform scaling (x/y). instead you can first, draw a filled ellipse (blue) and then draw green one over it.  On 11 April 2014 21:33, Juraj Kubelka <juraj.kube...@gmail.com> wrote: Hi Igor, hi all! I am not sure how to properly draw ellipse. Right now I draw a path like this: The path is created that way: -=-=-=-=- computePath path := self athensCanvas createPath: [ :builder |  builder absolute; moveTo: 0 @ 0.5; ccwArcTo: 0.5 @ 0.0 angle: 90 degreesToRadians; ccwArcTo: 0.0 @ -0.5 angle: 90 degreesToRadians; ccwArcTo: -0.5 @ 0.0 angle: 90 degreesToRadians; ccwArcTo: 0 @ 0.5 angle: 90 degreesToRadians ] -=-=-=-=- And draw it like this: -=-=-=-=- drawOn: athensCanvas athensCanvas pathTransform restoreAfter: [  athensCanvas pathTransform scaleBy: rectangle extent asFloatPoint athensCanvas  setPaint: color; drawShape: self path.   (athensCanvas setStrokePaint: strokePaint)  width: (self strokeWidth / self scale) asFloat.  athensCanvas drawShape: self path ] -=-=-=-=- But with a different shapes, the border does not have same width all around the ellipse. See the image: <Captura de pantalla 2014-04-11 a la(s) 16.29.13.png> Is there better way to draw it? Thank you, Jura --  Best regards, Igor Stasenko. --  Best regards, Igor Stasenko.