Re: playing with arcs
Re: playing with arcs
- Subject: Re: playing with arcs
- From: email@hidden
- Date: Thu, 15 Sep 2005 22:00:24 -0400
On Sep 15, 2005, at 5:43 PM, Giovanni Donelli wrote:
- (void)appendBezierPathWithArcFromPoint:(NSPoint)fromPoint toPoint:
(NSPoint)toPoint radius:(float)radius
I have 2 points and I am trying to draw an arc in between. it
simply doesn't work and I get an exception if I call solely the
method above and then I try to stoke the resulting path.
Somehow if I use before that:
- (void)moveToPoint:(NSPoint)aPoint
the exception disappears but the arc is simply not drawn on the view.
any idea???
I assume you're trying to draw a curve. You need to use moveToPoint:
to set the "starting point" for your path. Maybe you could use
whatever value you have for fromPoint in the moveToPoint: method, and
see if that helps. You also might want to investigate using a
similar method to the above,
appendBezierPathWithArcWithCenter:radius:startAngle:endAngle:clockwise,
which I what I use to draw curves. Make sure you've set the color
of the stroke (eg. [[NSColor grayColor] set]) and the path's line
width before you stroke it.
There's a great deal of examples out there involving NSBezierPath.
You might want to try searching the cocoabuilder archives.
Cameron
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