Date: Wed, 20 Feb 2002 15:05:05 -0500 From: "Hannes Kaufmann" Subject: Re: immersive modeling systems Sender: To: "joachim deisinger" Cc: <3d-ui@hitl.washington.edu> Message-id: <3C740171.C6F5562@unet.univie.ac.at> Organization: Geometrek (http://www.geometrek.com) MIME-version: 1.0 X-Mailer: Mozilla 4.73 [en] (Win98; U) Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 8BIT Importance: Normal X-MSMail-Priority: Normal X-Accept-Language: en X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3110.3 References: <3C73BB9B.9080105@iao.fhg.de> X-Authentication-warning: torch.hitl.washington.edu: majordom set sender toowner-3dui@hitl.washington.edu using -f X-Priority: 3 (Normal) I'm developing the Augmented Reality application Construct3D since 1999. Construct3D is a three dimensional geometric construction tool specifically designed for mathematics and geometry education. It is fully immersive but cannot be defined as a pure modeling system. In cooperation with psychologists our main aim is to create a tool for effectivly improving spatial abilities. Of course geometric functions such as boolean operations are implemented too (using OpenCascade) but advanced features will follow later - if at any use for our purposes. It supports dynamic constructions which means that by changing e.g. a point all elements connected to that point will change accordingly. The project webpage where you can see some pictures of students working with Construct3D (it is outdated though - from 2000) is at http://www.studierstube.org/projects/construct3d You can get more detailled information about its features and funcionality in our latest paper which has been accepted for the SIGGRAPH 2002 Educators Program: http://www.ims.tuwien.ac.at/media/documents/publications/Construct3D_SIG_Edu.pdf A 11 minute video (28MB, 320x200) is at http://www.ims.tuwien.ac.at/~kaufmann/video/Construct3D.rm (a higher quality video - 170MB - is available on request) To answer your questions: > - what is the area of application (conceptual or elaborative modeling, > sketching, etc.)? Education. Improving spatial abilities. > - what is the average size of models? no models in that sense (mechanical parts...) are constructed with it. > - is the modeler fixed to a certain visualization system like HMD, Cave > or Workbench? It is based on the AR system "Studierstube" which supports a great number of displays. For example it can be run on the desktop with AR Toolkit optical tracking too. > - what is the number of input options (one- or two-handed interaction, > gestures, required number of buttons, speech recognition)? Pen and Pad are the input devices (two handed). Speech recognition is planned. > - what sort of input devices is used, providing how many DOF? 6DOF. Pen with 1 or 2 buttons, gloves with 1 or 2 "buttons" used with our mobile system. all of it 6DOF > - is force feedback provided? no. > - which geometrical representation is used (discrete or continuous, > surface-, volume-, hybrid-representation)? Surface / hybrid. > - direct or indirect generation and modification of geometry? direct > - number of functions for generation and modification of geometry? not counted. > - which interaction metaphors are used? direct interaction everywhere. We cannot use e.g. ray-pick when trying to improve spatial abilities. We must know if the student act