virtual showcase modelling language

WIENWIEN

Virtual Showcase Modelling Virtual Showcase Modelling LanguageLanguage

Erich PohnErich Pohn

Erich Pohn

WIEN

Virtual Showcases Modelling Language

Virtual Showcase(1)Virtual Showcase(1) projector projector graphics display graphics display convex assembly of convex assembly of

half-silvered mirrors half-silvered mirrors shutter glasses shutter glasses head tracker head tracker

Erich Pohn

WIEN


beamer

half-silveredmirror

augmentation of real and virtual objects

(chessboard & chessmen)

mirror

projectionscreen

head tracking

Virtual Showcase(2)Virtual Showcase(2)

Erich Pohn

WIEN


InteractionInteraction different needs:different needs:

operates in publicoperates in public untrained audienceuntrained audience

AuthoringAuthoring content player => e.g. Studierstubecontent player => e.g. Studierstube content specification => VSML !content specification => VSML !

Our tasks ...Our tasks ...

Erich Pohn

WIEN


Goals of VSML (1)Goals of VSML (1)

Specification of ...Specification of ... contentscontents VS-hardwareVS-hardware input-devicesinput-devices Interaction Interaction

Erich Pohn

WIEN


Goals of VSML (2)Goals of VSML (2)

high level description:high level description: no (algorithmic) programming no (algorithmic) programming no geometry descriptionno geometry description access to well established formats access to well established formats

(IV,VRML,...)(IV,VRML,...) independent of viewer (eg. Studstube)independent of viewer (eg. Studstube) XML basedXML based

Erich Pohn

WIEN


Data flow (1)Data flow (1)

VSML viewer(Studierstube ?)

Contentdescription

Showcasedescription

Input-devicedescription

CompleteInstallationdescription

VRML,IV,...

OT/XML

? VSML

Rendering

Erich Pohn

WIEN


Data flow (2)Data flow (2)

StudierstubeStudierstubeInput-files

XSL Trafo

CompleteInstallationdescription

VSML ZAJIC !

???stube???stubeInput-files

XSL Trafo

??? !

native VSMLspeaker

Erich Pohn

WIEN


VSML specification (1)VSML specification (1)

presentation

scene

modelinstance(acess to res.)

fieldconnection(interaction)

link(next scene)

modelresource(eg. IV)

modelresource scene

... ...

...

Erich Pohn

WIEN


VSML specification (2)VSML specification (2)

<xs:complexType name="presentationType"> <xs:sequence> <xs:element name="modelresource" type="vsml:ModelResource" maxOccurs="unbounded"/> <xs:element name="scene" type="vsml:Scene" maxOccurs="unbounded"/> </xs:sequence> <xs:attribute name="input" type="xs:string" use="required"/> <xs:attribute name="output" type="xs:string" use="required"/></xs:complexType>

XML Schema stuff ...eg. definition of 'presentation':

Erich Pohn

WIEN


Example (1)Example (1)

presentation

modelinstance(s)laser, board

fieldconnectionlaser – station4

modelresourcelaser.iv

modelresourcechessboard.iv

scenechess application

station 4 in Opentracker config. file

Erich Pohn

WIEN



<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="vsml_stb.xslt"?><vsml:VSML xsi:schemaLocation="vsml vsml.xsd"> <presentation input="stb_ot.xml" output="UserKit.iv"> <modelresource file="laser.iv" name="laser"/> <modelresource file="board.iv" name="chessboard"/> <scene appName="chess_stb"/> <modelinstance resource="laser"/> <modelinstance resource="chessboard" position="0 0 0"/> <fieldconnection input="station4" object="LaserTrafo" field="translation"/> <fieldconnection input="station4" object="Lasertrafo" field="rotation"/> </scene> </presentation></vsml:VSML>

Erich Pohn

WIEN



<StbSink station="4" DEF="station4"> ...</StbSink>

DEF LaserTrafo SoTransform { translation ... rotation ...}

<fieldconnection input="station4" object="LaserTrafo" field="translation"/>

OpenTracker (stb_ot.xml) modelresource (laser.iv)

Erich Pohn

WIEN


Future workFuture work

completelycompletely implement/test all this stuff ... implement/test all this stuff ...

virtual showcase modelling language

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