Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!ucsd!ames!think!bloom-beacon!LCS.MIT.EDU!MAP
From: MAP@LCS.MIT.EDU (Michael A. Patton)
Newsgroups: comp.windows.x
Subject: Question about XDrawArc
Message-ID: <8907090132.AA11530@gaak.LCS.MIT.EDU>
Date: 9 Jul 89 01:32:36 GMT
References: <2188@maya.oakhill.UUCP>
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
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   Date: 7 Jul 89 20:16:20 GMT
   From: usc!cs.utexas.edu!oakhill!koon@bloom-beacon.mit.edu  (Ming Lao)

	angle1      specifies the start of the arc relative to the three
		    o'clock position from the center, in units of degrees * 64.
	angle2      [same]

   [...] According to the manual, if angle2 is 1, an arc should be drawn
   with extent of 64 degrees.

   I wonder if I have misunderstood the manual or there is a bug in the 
   XDrawArc routine ? 

I think you misunderstood the manual, my reading of that text says that
angle2=1 gives 1/64 of a degree (so small you won't be able to see it,
the symptom you report).  In fact with other information around, this is
the only reasonable interpretation (you want to be able to position the
ends to more than 6 different angles don't you? :-) Try using much
larger numbers for angle2.  4096 should produce a 64 degree angle (if
that's what you really want).