NetNews Usenet Archive 1993 #3/NN_1993_3.iso/spool/comp/graphics/explorer/471

Internet Message Format | 1993-01-21 | 1.8 KB

Path: sparky!uunet!olivea!sgigate!sgi!fido!batman.asd.sgi.com!hwa
From: [e-mail] (John Hwa)
Newsgroups: comp.graphics.explorer
Subject: Re: VectorGen
Message-ID: <[e-mail]>
Date: 22 Jan 93 00:20:01 GMT
References: <[e-mail]> <[e-mail]>
Organization: Silicon Graphics, Inc.
Lines: 29
NNTP-Posting-Host: batman.asd.sgi.com

In article <[e-mail]>, [e-mail] (Scott Ferguson) writes:
|> In article <[e-mail]>, [e-mail] (Lisa Ferjo) writes:
|> |>
|> |> I have a question about VectorGen. I read in 4 data variables using a dscribe
|> |> module.  By using ChannelSelect I use the 4th data variables to map specific
|> |> colours onto my image.  I want to use the first three variables as input
|> |> to VectorGen.  But I get the error:
|> |>           Type Mismatch: Input port "Input" of type cxLattice received
|> |>                   unexpected data.
|> |>    INput port wants NUM data Variables : [1..3]
|> |>    incoming data is Num data Variables: 4
|> |> Is there any way around this besides creating two dscribe modules, one to
|> |> read in the values for colourmap and another for VectorGen.
|> |>
|> |> Thanks Lisa
|>
|> What you need is a module to extract a vector rather than a single channel,
|> much like ChannelSelect. Looks like you'll need to write your own at this
|> point, with mbuilder.
|>
|> Will there be a module like this in the standard 2.0 module set?

One thing you can try is to build a dscribe module with 2 lattices
defined in an output Explorer template.  One lattice contains data
from first three variables which can feed into VectorGen and the
other lattice contains the 4th variable for color mapping purposes.

John P. Hwa
[e-mail]