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Vol: 53(67) No: 3 / September 2008 Graphical Annotation – a New Interaction Method with 3D Learning Objects in eLearning Environments Teodor Stefanut Computer Science Department, Technical University of Cluj-Napoca, 26 G. Baritiu St., 400027, Cluj-Napoca, Romania, phone: +40-264-401478, e-mail: teodor.stefanut@cs.utcluj.ro Dorian Gorgan Computer Science Department, Technical University of Cluj-Napoca, 26 G. Baritiu St., 400027, Cluj-Napoca, Romania, e-mail: dorian.gorgan@cs.utcluj.ro, web: http://users.utcluj.ro/~gorgan Keywords: annotation, 3D learning objects, eLearning platform, annotation assessment, interaction technique Abstract This paper presents the main advantages of using 3D objects in distance learning lessons and a new technique of user interaction with these. The experiments and examples have been developed in a new eLearning platform named eTrace that uses the annotation as main user interaction technique. The user has the ability to make 3D annotations by drawing directly on the surface of the object or by placing the annotation in 3D space. All the new elements become 3D objects into the scene but the annotations are separately encoded, stored and managed into the system, being independent from the file type (.obj, .3ds) or display technology (OpenGl, DirectX). References [1] Visible Human Project, http://www.nlm.nih.gov/research/visible/. [2] Mauro De Donatis, Giuliano Gallerini, and Sara Susini, “3D Modelling Techniques for Geological and Environmental Visualisation and Analysis”, Digital Mapping Techniques 2005 – Workshop Proceedings. [3] P. H. Giao, N. Phien-Wej, Y. Honjo, “FEM quasi-3D modelling of responses to artificial recharge in the Bangkok multiaquifer system”, Environmental Modelling and Software, Volume 14, Issues 2-3, December 1998, Pages 141-151. [4] Karim Osman, Francois Malric, Shervin Shirmohammadi, “A 3D Annotation Interface Using the DIVINE Visual Display”, HAVE\'2006 - IEEE International Workshop on Haptic Audio Visual Environments and their Applications Ottawa, Canada 4-5 November 2006. [5] Lichan Hong, Ed H. Chi, Stuart K. Card, “Annotating 3D Electronic Books”, Proceedings of ACM Conference on Human Factors in Computing Systems (CHI 2005)- Conference Companion; 2005 April 2-5; Portland OR. NY: ACM Press; 2005; 1463-1466. [6] Thomas Jung, Mark D. Gross, Ellen Yi-Luen Do, “Annotating and Sketching on 3D Web models”, Proceedings of the 7th International Conference on Intelligent user interfaces; 2002; San Francisco, California, USA; pp. 95-102 [7] Goddard T., Sunderam V. S., “ToolSpace: Web Based 3D Collaboration”, Proceedings of the 1999 International Conference on Intelligent User Interfaces, January 5-8, 1999, Redondo Beach, CA, USA, pp. 161- 165 [8] Gorgan, D., Stefanut, T., Gavrea, B., Pen Based Graphical Annotation in Medical Education, CBMS 2007 – 20th IEEE International Symposium on Computer-Based Medical Systems, Maribor, Slovenia 20-22 June, 2007. IEEE Computer Press, pp. 681-686. |