Re: Drawing
Re: Drawing
- Subject: Re: Drawing
- From: "Dennis C. De Mars" <email@hidden>
- Date: Sat, 16 Jun 2001 10:59:17 -0700
on 6/15/01 6:53 AM, Joshua D. Orr at email@hidden wrote:
>
I have lots points, some of them have lines connected between them, some of
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the lines/points make polygons that need to be filled in. I need to make it
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so that the user can drag the points around individually. I was thinking of
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using NSBezierPath, but when I was reading about it, it said that it's
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subpaths can't be change individually, only as a group, and you will need to
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make separate NSBezierPaths. But this seems kind of a lot of overhead?
>
>
Any of you have any suggestions on what I can use?
In the documentation of NSBezierPath, there is a group of methods listed
under the heading "Accessing elements of a path." These include methods
called "- elementTypeAtIndex:associatedPoints:" and "-
setAssociatedPoints:atIndex:" It looks to me as if you _could_ change
individual points in an existing NSBezierPath with these, although I haven't
tried this myself. Where did you read that the subpaths can't be changed?
Actually, if I was doing what you describe, I'd probably just store the
points myself and recreate the NSBezierPath whenever a point is changed.
When you say "need to make separate NSBezierPaths" I don't know if you mean
have one NSBezierPath and replace it with a new one whenever one of the path
points changes, or have a bunch of NSBezierPaths, one for each segment. I
would pick the former solution myself. I guess an advantage of the latter is
if you change a point you only have to redraw that segment, whereas if you
only have one NSBezierPath, the entire path has to be redrawn when you
change just one segment.
- Dennis D.
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| | >Drawing (From: "Joshua D. Orr" <email@hidden>) |