Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.javascript > #38623

Re: Canvas filled circles

Show all headers | View raw

Den fredag 31 juli 2020 kl. 10:19:30 UTC+2 skrev luserdroog:
> On Thursday, July 30, 2020 at 5:41:58 PM UTC-5, Jonas Thörnvall wrote:
> > When i draw 2 filled circles.
> > ctm.arc(tileElement[u].X+50, tileElement[u].Y+50, 15, 0, 2 * Math.PI);
> > ctm.arc(tileElement[v].X+50, tileElement[v].Y+50, 15, 0, 2 * Math.PI);
> > ctm.fill();
> > 
> > And then draw two more to the right there is two triangles between them formed xshaped/butterfly?
> > 
> > Why?
> 
> I've seen this in PostScript drawing. It can happen when arc has a subtly
> different behavior depending upon whether there's a current point in the
> path. If there's no current point, arc will start with a MoveTo element.
> But if there is a current point, arc will start with a LineTo element.
> 
> The workaround is to call fill() or whatever your drawing operation is
> after each shape. Filling will implicitly clear the path.

Well i added fill after every ARC, and there is just two so that is not it?
I basicly have just three drawn elements rectangles, arcs and from Unicode charset.

And 2*Math.PI is the correct full circle, it is not somehow open at end?

Back to comp.lang.javascript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Canvas filled circles Jonas Thörnvall <jonas.thornvall@gmail.com> - 2020-07-30 15:41 -0700
  Re: Canvas filled circles luserdroog <luser.droog@gmail.com> - 2020-07-31 01:19 -0700
    Re: Canvas filled circles Jonas Thörnvall <jonas.thornvall@gmail.com> - 2020-07-31 03:13 -0700
      Re: Canvas filled circles Jonas Thörnvall <jonas.thornvall@gmail.com> - 2020-07-31 03:38 -0700
      Re: Canvas filled circles luserdroog <luser.droog@gmail.com> - 2020-07-31 10:44 -0700
        Re: Canvas filled circles Jonas Thörnvall <jonas.thornvall@gmail.com> - 2020-07-31 11:06 -0700
        Re: Canvas filled circles luserdroog <luser.droog@gmail.com> - 2020-07-31 11:56 -0700
  Re: Canvas filled circles "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2020-07-31 11:49 -0700
    Re: Canvas filled circles Jonas Thörnvall <jonas.thornvall@gmail.com> - 2020-07-31 12:30 -0700

csiph-web