( For those of you who want to look at the home page of the tour, point to
the following URL: http://www.butterfly.net/lab/daniel/sign.html )
How we did it:
This "world" document http://www.butterfly.net/lab/ushm.wrl was well
integrated in our demonstration with NCSA Mosaic - a link on the HTML document
whose URL is given above launched the "helper" application Labyrinth
(this was all configured with MIME), and it read in the .wrl "world" file.
Once Labyrinth launched, it began parsing the world file, which then drew
the models in from _across_ the Internet. (To my knowledge this is the
first time that this has ever been done.) Once all of the models in the
world had been assembled, the user could "walkthrough" the model. If
there was a "link" from an object in the model back into the Web (or to
another virtual world) the cursor would change apprpriately, like it does
in Mosaic, and clicking on the object would bring up the associated Web
page or "teleport" to another virtual world.
Thus we demonstrated the first of the goals as given on the VRML vision
statement; complete integration of Webspace (hyperspace) and cyberspace,
so that we could make a "place" accessible from anywhere on Internet.
My favorite moment was when an Internet-hip 9 year-old said "this is cool."
The adults seemed to like it too; one in particular, David Blair, the
NYC-based video maker and director of "WAX: or the Discovery of
Television Among the Bees", who, in conjunction with LG, will be
integrating Labyrinth with WaxWeb, which uses PARC's MOO technology along
with some software written by Tom Meyer of Brown University. I hope you'll
be able to see some of the fruits of this work in the fall at WWWF '94.
Lastly, I'd like to thank all of the people who helped to make this work
such a success; Tony Parisi, who contributed know-how; C. Scott Young, who
did an amazing job making the room live in virutal space; Monica Larson, who
did a fine job on the Web pages; David Levine, who coordinated the Web pages
and acted as liasion to the Museum; Stephen Shapero, who sysoped the Web
site and helped with SIGGRAPH preparations and demos; Servan Keondjian, Doug
Rabson and Kate Seekings, who gave us a powerful push forward with the
RealityLab rendering engine; and finally, Coco Conn, Nancy Ingle, and the
tremendous staff at SIGKIDS, who took $5000 and built a world with it.
Mark Pesce
President
Labyrinth Group
[email protected]
Here is the Labyrinth-VRML file which defines the world.
_______________________________________________________________________
# This is the VRML file, using Labyrinth VRML version 1.4
# It describes the scene layout for the virtual tour through the
# US Holocaust Memorial Museum in Washington, D.C.
# It shows us one room, which is the room from the Warsaw ghetto where
# Daniel lived during the Second World War, before his family was sent
# to Auschwitz.
#
# VRML File composed by Mark D. Pesce and Stephen Shapero
# Models and layout by C. Scott Young
# Copyright (c) 1994, Labyrinth Group and Husky Labs
#
# In Labyrinth VRML, the VRML documents have a form which opens with
# a world definiton, continues through a series of object definitions, and
# then into a scene definition, which arranges the defined objects into
# a scene. As of this version (1.4) there is no treatment for lights.
#
World "Daniel's Story" Begin # This opens the World Definition
#
# In Labyrinth VRML, object definitons have at least a shape characteristic.
# Beyond this they can also have color or texture characteristics.
# In order to speed loading across an Internet, we have chosen to load in
# a "binary" representation of a polygon mesh. This is the ".xof" file format.
# The "Shapefile" keyword, given a URL, loads the polymesh in from the URL.
# Objects are given names when they are defined, names which are referenced`
# during scene definition.
#
Object "bed1" Open # One of the beds in the scene
Shapefile "http://www.butterfly.net/lab/bed1.xof" # URL of polymesh
Color 1 0.90 0.66 # Define color as R G B components from 0.0 to 1.0
Material 0.55 0.5 # This is the specular (ks) and power (kd)
Close # Must balance the Object Open statement
Object "bed2" Open
Shapefile "http://www.butterfly.net/lab/bed2.xof"
Color .43 .21 .08
Material 0.85 0.5
Close
#
# Note that here the polymesh is being gathered from another host,
# Which demonstrates that a world can "assemble" itself from hosts all
# over the Internet.
#
Object "bechsq-1" Open
Shapefile "http://www.hyperreal.com/~mpesce/ushm/bechsq-1.xof"
Color 1 .90 .66
Material 0.85 0.5
Close
Object "bechsq-2" Open
Shapefile "http://www.hyperreal.com/~mpesce/ushm/bechsq-2.xof"
Color .43 .25 .10
Material 0.85 0.5
Close
Object "lamp-p" Open # Lamp post
Shapefile "http://www.hyperreal.com/~mpesce/ushm/lamp-p.xof"
Color .35 .31 .43
Material 1 0.5
Close
Object "bedharo1" Open # Flat bed mattress
Shapefile "http://www.butterfly.net/lab/bedharo1.xof"
Color 1 .90 .66
Material 0.85 0.5
Close
Object "bedharo2" Open # Flat bed frame
Shapefile "http://www.butterfly.net/lab/bedharo2.xof"
Color .43 .21 .08
Material 0.85 0.5
Close
Object "lamp-l" Open # The light portion of the lamp
Shapefile "http://www.hyperreal.com/~mpesce/ushm/lamp-l.xof"
Color 1 .62 .25
Material 0.85 0.5
Close
Object "bednxt1" Open # This is the rounded bed
Shapefile "http://www.butterfly.net/lab/bednxt-1.xof"
Color 1 .90 .66
Material 0.85 0.5
Close
Object "bednxt2" Open # Mattress portion of the bed
Shapefile "http://www.butterfly.net/lab/bednxt-2.xof"
Color .43 .21 .08
Material 0.85 0.5
Close
Object "danlgtb" Open # This is the long table
Shapefile "http://www.butterfly.net/lab/danlgtb.xof"
Color .43 .21 .08
Material 0.85 0.5
Close
Object "dansbox" Open # The box beside the bed
Shapefile "http://www.butterfly.net/lab/dansbox.xof"
Color .05 .50 .08
Material 0.85 0.5
Close
Object "dansflr1" Open # The floor for the entire scene
Shapefile "http://www.butterfly.net/lab/dansflr1.xof"
Color .54 .50 .71
Material 0.85 0.5
Close
Object "dantabl" Open # This is the smaller table
Shapefile "http://www.butterfly.net/lab/dantabl.xof"
Color .41 .26 .17
Material 0.85 0.5
Close
Object "danwrbd1" Open # This is the mattress for the wire bed frame
Shapefile "http://www.butterfly.net/lab/danwrbd1.xof"
Color 1 .90 .66
Material 0.85 0.5
Close
Object "danwrbd2" Open # This is the wire bed frame
Shapefile "http://www.butterfly.net/lab/danwrbd2.xof"
Color .41 .26 .17
Material 0.85 0.5
Close
Object "sink" Open # This is the sink
Shapefile "http://www.butterfly.net/lab/sink.xof"
Color .60 .60 .60
Material 0.85 0.5
Close
Object "stack" Open # This is the fireplace
Shapefile "http://www.butterfly.net/lab/stack.xof"
Color .70 .15 .15
Material 0.40 0.20
Close
Object "page1" Open # This is one of the diary pages in the scene
Shapefile "http://www.butterfly.net/lab/page1.xof"
Color 1 1 1
Material 0.85 0.5
Close
Object "page2" Open # This is another diary page
Shapefile "http://www.butterfly.net/lab/page2.xof"
Color 1 1 1
Material 0.85 0.5
Close
Object "page3" Open # Another diary page
Shapefile "http://www.butterfly.net/lab/page3.xof"
Color 1 1 1
Material 0.85 0.5
Close
Object "page4" Open # And yet another
Shapefile "http://www.butterfly.net/lab/page4.xof"
Color 1 1 1
Material 0.85 0.5
Close
Object "danwal-n" Open # This is the inner wall surface
Shapefile "http://www.butterfly.net/lab/danwal-n.xof"
Color .47 .25 .20
Material 0.30 0.5
Close
Object "danwal-o" Open # This is the outer wall surface
Shapefile "http://www.butterfly.net/lab/danwal-o.xof"
Color .59 .59 .70
Material 0.25 0.5
Close
#
# End of object definitions for this world
#
# Labyrinth VRML defines a Camera construct which opens the view of
# The scene to a particular position. The Camera construct is required.
# It is made up of a position vector, two orientation vectors ( direction, up ),
# and a field construct, which determines the field of view.
#
Camera Begin
Position 9.3872 1.98537 2.61755 # In front of the door to the room
Orientation -0.999985 0 -0.0053015 0 1 0 # Right side up
Field 0.5 -0.5 0.5 -0.5 # Normal field of view.
End # Camera definition
#
# We now begin the scene definition. A scene is an arrangement of objects.
# This is analagous to the difference between a class definition and a class
# instance in object-oriented programming; while a class definition may
# be defined, until it is actually instanced, it doesn't really exist.
# Just as in OOP, any object definition may be instanced an indefinite
# number of times within a scene definition. Although all objects in this
# scene are referenced only once, one could easily create a scene which used
# many replications of the same object, say a library with lots of books
# which look alike.
#
Scene "First" Begin
# A scene MUST contain at least the following items; an object reference,
# as defined above, a position vector and an orientation vector pair.
# It MAY contain a URL "anchor", if desired.
#
Element # Indicates presence of scene element
{
Object "bed1" # References defined object bed1
Position 0 0 0 # Positions were setup by scene layout tool
Orientation 0 0 1 0 1 0 # As were orientations, in 3D Studio
}
Element
{
Object "bed2"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
#
# Within Labyrith we can handle two basic types of anchors;
# Anchors into Web docments (generally .html), or anchors into
# Other Labyrinth worlds (.wrl files). Labyrinth discriminates
# between .wrl files and everything else, handling the .wrl files
# as "teleports" into other worlds, and sending everything else to
# NCSA Mosaic for it to deal with.
#
# This is an example of a teleport link to Dr. Who's "Tardis"
#
Element
{
Object "bechsq-1"
Position 0 0 0
Orientation 0 0 1 0 1 0
URL "http://www.butterfly.net/lab/doctor.wrl"
}
Element
{
Object "bechsq-2"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
#
# This is an example of a Web document link to the starting page
# of "Daniel's Story"
#
Element
{
Object "lamp-p"
Position 0 0 0
Orientation 0 0 1 0 1 0
URL "http://www.butterfly.net/lab/daniel/sign.html"
}
Element
{
Object "lamp-l"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "bedharo1"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "bedharo2"
Position 0 0 0
Orientation 0 0 1 0 1 0
URL "http://www.butterfly.net/lab/daniel/bed.html"
}
Element
{
Object "bednxt1"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "bednxt2"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "dansbox"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "danlgtb"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "dansflr1"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "danwrbd1"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "danwrbd2"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "sink"
Position 0 0 0
Orientation 0 0 1 0 1 0
URL "http://www.butterfly.net/lab/daniel/sink.html"
}
Element
{
Object "stack"
Position 0 0 0
Orientation 0 0 1 0 1 0
URL "http://www.butterfly.net/lab/daniel/fireplace.html"
}
Element
{
Object "dantabl"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "danwal-n"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "danwal-o"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "page1"
Position 0 0 0
Orientation 0 0 1 0 1 0
URL "http://www.butterfly.net/lab/daniel/entry2.html"
}
Element
{
Object "page2"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
Element
{
Object "page3"
Position 0 0 0
Orientation 0 0 1 0 1 0
URL "http://www.butterfly.net/lab/daniel/entry3.html"
}
Element
{
Object "page4"
Position 0 0 0
Orientation 0 0 1 0 1 0
}
End # of Scene definition - no elements outside of this
End # of world definition - NOTHING outside of this