Circle Arcs

[Vic DiFranco]

Hello Kei and Joel,

	I was the one who originally submitted the question on circle arcs.

	I tried to do what Kei Ishii suggested, but not successfully. I have  
OmniGraffle Pro ver 4.2.1. My computer is a Macintosh Powerbook G4  
with OS 10.4.11.

	I created a 90 deg arc, using the built-in tool in the Styles  
Inspector (Lines and Shapes). I turned off the Shadow and Fill, so  
there is only a 90 deg arc. In my example, the object measures 2 in x  
2 in.

	I then duplicated the object (Edit-Duplicate), and rotated the copy  
45 deg in the Properties Inspector (Geometry). As best I could, I  
overlapped the two objects over the 45 deg common segment. Actually,  
they don't overlap exactly - there must be a minor error introduced  
with the rotation.

	But then, selecting both objects and Edit-Shapes-Subtract Shapes, I  
get as a result a custom shape which is a segment, rather than an  
arc. That is, the two radii are drawn to the arc. Also, there is a  
slight error at the "center", where the radii meet. They don't meet  
exactly.

	All-in-all, a lot of work for less than ideal results.

	Joel, I think a future upgrade should add the ability to create  
arcs, of any degree. This seems to be a fundamental need for any  
drawing program, and I'm surprised that a fine program like  
OmniGraffle doesn't include it.

	Best regards,
	Vic DiFranco