Michael Jones (mtj++at++babar)
Wed, 12 Jan 1994 08:46:32 -0800
:From: Marcus Rothstein Deutsche Aerospace (DASA), Munich, GERMANY
:Phone: 011-49-89-607-28312 FAX: 011-49-89-607-22491
:-----------------------------------------------------------------------
:Subject: Distinct Light Point Control of Cloned Nodes
:
:Our questions are:
:
: 1 - How can we clone a node (e.g. same type of aircraft) with distinct
: control over the aircraft's light point characteristics?
:
: example: 1. Aircraft on ground with light points off, and
: 2. Same type of aircraft in the air, light points on?
The pfLightPoint nodes will be shared in cloned geometry, so that's not
a solution. The true answer is to put a pfSwitch node above the light
points, with as many pfLightPoint nodes attached to the pfSwitch as are
needed to represent all the "parallel" light point states. Then after
the clone, set one vehicles switch node to "ON" and the other to "OFF"
as in the example above. More elaborate states would require more nodes
attached to the pfSwitch node.
: 2 - Light point color.... the manual advises that the "actual light
: point color shall depend on the direction, shape, position, and fog."
:
: We experienced that the light points do not attenuate in fog
: conditions. Can you please advise why?
Because the person who wrote that part of the manual described the way
it should be rather than the way it is. The fogging of pfLightPoints must
be handled specially, since luminous objects like lights are visible at
greater ranges than non-luminous ones such as runways. Versions of IRIS
Performer up to now have not addressed this issue. This support has been
added to IRIS Performer 1.2, however, and it's a feature you can look for
in the upcoming release.
P.S. Thanks for the umbrella.
--Be seeing you, mtj++at++sgi.com 415.390.1455 M/S 7L-590 Michael Jones Silicon Graphics, Advanced Graphics Division 2011 N. Shoreline Blvd., Mtn. View, CA 94039-7311
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