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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!moe.ksu.ksu.edu!wyatt.ksu.ksu.edu!news
- From: dudley@wyatt.ksu.ksu.edu (D U D L E Y)
- Newsgroups: comp.graphics.animation
- Subject: Re: Trouble with POV animation/texturing
- Date: 12 Jan 1993 13:28:42 -0600
- Organization: Kansas State University
- Lines: 39
- Message-ID: <1iv65aINN76q@wyatt.ksu.ksu.edu>
- References: <1993Jan9.183129.13662@miles.com> <1ispmoINNbh7@matt.ksu.ksu.edu> <1993Jan12.145700.9632@miles.com>
- NNTP-Posting-Host: wyatt.ksu.ksu.edu
-
- sjm@miles.com (Scott Mark) writes:
-
- >From the original posting: (No offense intended, but read what I _wrote_!)
-
- >>I have been thinking about doing animations with POV, but it seems that
- >>the texture I'm using (DMFWood4) shifts when I move my camera!
- > ------
-
- >I am not moving objects, before or after applying textures. For completeness
- >I am including the scene file below. It is short. It doesn't take long
- >to render with antialiasing turned off.
-
- >When I render the following scene, I get some nice variation to the rings
- >running diagonally from top-front-left of the box to bottom-front-right.
-
- >If I move the camera to <1 7 -10> to get a closer look, the variation
- >disappears! Just nice smooth concentric rings.
-
- [ data file deleted ]
-
- Not trying to make you feel like a bonehead or anything :) but .... there
- is nothing wrong with your texture. You have the same texture in both
- viewpoints. The reason they look different is due to the Moire effect. The
- pixel resolution of your monitor is unable to accurately respresent the
- pixel rez of the data file.
-
- I traced both views with the following options:
- +w320 +h200 -v +d +ft +b300 +a0.1 +q9
- and converted both images to rle format. They are available for ftp from
- matt.ksu.ksu.edu (in incoming) for a short time. You will need to have
- getx11 installed to view them. I recommend using the zoom feature (mouse
- buttons) of getx11.
-
- With the zoom functions it is plainly obvious that both of the wood grains
- consist of nearly straight lines.
-
- --
- John "Dudley" Hunkins
- dudley@matt.ksu.ksu.edu
-