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Article #169

Re: streak.c and average velocity

#169
From: Wizard of OZ
Date: Fri, 11 Dec 1992 18:52
37 lines
1666 bytes
In article <1992Dec11.160107.8845@seas.gwu.edu>, favre@seas.gwu.edu (Jean Favre) writes:
|> From: favre@seas.gwu.edu (Jean Favre)
|> Newsgroups: comp.graphics.explorer
|> Subject: streak.c and average velocity
|
|> I have been looking at the code of streak.c in the Streakline module so I
|> could modify it for my own needs. I am puzzled by the following line in the 
|> code, where the average velocity is computed:
|> 
|> ave_vel =
|>    velocity[0]*velocity[1]+velocity[1]*velocity[1]*velocity[2]*velocity[2];
|> 
|> Shouldn't this be:
|> 
|> ave_vel = 
|>  velocity[0]*velocity[0]+velocity[1]*velocity[1]+velocity[2]*velocity[2];
|> 

Yes, you are correct. One more typo caught.

This value was only used in determining when a dead spot was found, so
the actual streaks are correct. It just may have stopped at the wrong time.

Note that an expensive sqrt is not used because it is just a criteria for
completion.

|> -- 
|> Jean M. Favre. EE&CS Dept. The George Washington University
|> 		(202) 994 5917
|> 		favre@seas.gwu.edu

-- 

Gary Griffin			Second to the left	
gary@sgi.com			Straight on to morning
						P. Pan	
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From: gary@enigma.esd.sgi.com (Wizard of OZ)
Newsgroups: comp.graphics.explorer
Subject: Re: streak.c and average velocity
Date: 11 Dec 1992 18:52:28 GMT
Organization: Silicon Graphics Computer Systems, Mountain View, CA
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