--- On Sat, 2/28/09, Jerome Peace peace_the_dreamer@yahoo.com wrote:
From: Jerome Peace peace_the_dreamer@yahoo.com Subject: Re: [Etoys] PolygonMorph To: "antonio" antoniomoreno@edu.juntaextremadura.net Date: Saturday, February 28, 2009, 1:36 AM Hi antonio,
Good recipes. I was easily able to recreate the problem.
This seems at base an old polygon problem that tends to happen when there is only one vertex. The handles have to take extra care at that point not to index a non existent one.
This was repaired in 3.9. Eventually the easiest thing was to factor out the computation of midpoint (used for the triangle handles). The trick was to check for the single vertex and handle that as a special case.
Yoshiki: if you will look at 3.9 or 3.10 PolygonMorph>>updateHandles and Polygon>>midpoints you should see a solution. This code is independent of the other repairs (i.e. cuvier curve fitting) so it should be easily portable to etoys and 3.8. It might require some repairs to the arrowhead code IIRC. I remember having to repair that as a cascade of this repair.
Hth.
Yours in curiosity and service, --Jerome Peace
--- On Fri, 2/27/09, antonio antoniomoreno@edu.juntaextremadura.net wrote:
From: antonio
antoniomoreno@edu.juntaextremadura.net
Subject: [Etoys] PolygonMorph To: etoys@laptop.org Date: Friday, February 27, 2009, 3:47 AM Sorry, I know "sometimes" is very poor... I find some differences now:
1.- create an instance of Curve (Basic categorie at
Object
Catalog) 2.- Halo > Menu > Show handles with it 3.- open its Viewer and look for "vertices", you'll find: remove all vertices but cursor Run this command once then I get an EvaluationError
1.- create an instance of Curve (Basic categorie at
Object
Catalog) 2.- open its Viewer and look for "vertices", you'll find also: remove all vertices but cursor Run this command once 3.- now that you have a black point, get (complicated without easySelection ON, perhaps easySelection could have a keyboard shortcut) its Halo and clic on Menu > Show handles 4.- look for: remove all vertices but cursor and run
this
command once then I get an PreDebugWindow
1.- create an instance of Curve (Basic categorie at
Object
Catalog) 2.- Halo > Menu > Show handles with it 3.- open its Viewer and look for "vertices", you'll find also: remove all vertices but cursor Run this command once 4.- now that you have a blue circle and a orange
triangle,
clic on the triangle: OrderedCollection error or try to move the object from the blue circle: OrderedCollection error
regards
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