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From: jmunkki@kampi.hut.fi (Juri Munkki)
Newsgroups: comp.graphics,comp.sys.mac.programmer
Subject: Re: A deficiency in the Mac ellipse algorithm?
Summary: A way to draw connected ellipses.
Message-ID: <20340@santra.UUCP>
Date: 10 Mar 89 13:43:38 GMT
References: <395@brunix.UUCP> <4070@ingr.com> <339@gtss.gatech.edu> <7929@boring.cwi.nl> <1053@geocub.greco-prog.fr>
Sender: news@santra.UUCP
Reply-To: jmunkki@kampi.UUCP (Juri Munkki)
Organization: Helsinki University of Technology, Finland
Lines: 37
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Xref: utzoo comp.graphics:4840 comp.sys.mac.programmer:4952

I just got tired of all this talk about a deficiency in the Quickdraw ellipses. 
There's a very simple way to draw connected ellipses using Quickdraw...

Here's a program that draws to ellipses. The first one has the expected gaps,
but the second is connected. Maybe no one else thought of this solution? It
takes longer to draw this way, but at least you get what you want.

void	main()
{
	GrafPort	MyPort;
	Rect		TheOval;
	RgnHandle	MyRgn;
	
	InitGraf(&thePort);
	InitCursor();
	OpenPort(&MyPort);
	EraseRect(&MyPort.portRect);

	SetRect(&TheOval,10,10,502,30);
	FrameOval(&TheOval);

	MyRgn=NewRgn();
		OpenRgn();
			OffsetRect(&TheOval,0,30);	
			FrameOval(&TheOval);
		CloseRgn(MyRgn);
		FrameRgn(MyRgn);
	DisposeRgn(MyRgn);

	while(!Button());
	while(Button());
}

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|     Juri Munkki jmunkki@hut.fi  jmunkki@fingate.bitnet        I Want   Ne   |
|     Helsinki University of Technology Computing Centre        My Own   XT   |
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