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- Path: sparky!uunet!think.com!ames!sgi!fido!enigma.esd.sgi.com!gary
- 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
- Lines: 37
- Distribution: world
- Message-ID: <1gao1cINN6lb@fido.asd.sgi.com>
- References: <1992Dec11.160107.8845@seas.gwu.edu>
- Reply-To: gary@sgi.com
- NNTP-Posting-Host: enigma.esd.sgi.com
-
- 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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