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- Path: sparky!uunet!spool.mu.edu!agate!ames!sgi!fido!cashew.asd.sgi.com!kurt
- From: kurt@cashew.asd.sgi.com (Kurt Akeley)
- Newsgroups: comp.sys.sgi
- Subject: Re: How to render an image larger than screen?
- Date: 18 Dec 1992 01:22:51 GMT
- Organization: Silicon Graphics, Inc.
- Lines: 27
- Distribution: world
- Message-ID: <1gr95bINN23d@fido.asd.sgi.com>
- References: <1992Dec17.201401.13749@news.acns.nwu.edu>
- NNTP-Posting-Host: cashew.asd.sgi.com
-
- --
-
- In article <1992Dec17.201401.13749@news.acns.nwu.edu>, l-he@nwu.edu (Liang He) writes:
- |> Hello Everyone,
- |>
- |> Does anyone out there have the experience to render an image
- |> larger than screen?
- |>
- |> We have a slice maker which has much higher resolution than
- |> Iris's screen. While making slice, we would like to render an image
- |> with higher resolution than the screen's 1280x1024, say 4096x4096.
- |> So we can fully use the resolution of our slice maker. How can we do
- |> it? Can AVS, Ape, or Explorer do it? We have a SGI Personal Iris.
-
- Render the image as a sequence of subimages in multiple passes. For each
- subimage, use the window (not the perspective) command to specify a
- non-symetric viewing frustum. Make the viewing frustum N pixels larger
- than the tile in all four screen directions, where N is the largest of
- 1/2 the point size and 1/2 the line width. Expand the left and bottom
- edges even farther if character strings are to be rendered. Use the
- screen mask to limit actual rendering to the actual tile area. Specify
- the viewport to match the frustum, not the tile.
-
- You may want to increase the point width and line size for high-resolution
- images.
-
- -- Kurt Akeley kurt@sgi.com (415) 390-3612 M/S 7U-550
-