Proceedings of the First International Conference on Computer Graphics Theory and Applications Acronym: GRAPP 2006/VISIGRAPP Event held on: February 25-28, 2006, in Setúbal, Portugal Editors: José Braz 1 , Joaquim Jorge 2 , Miguel Dias 3 and Adérito Fernandes Marcos 4 Affiliations: 1 Escola Superior de Tecnologia de Setúbal, Portugal , 2 INESC-id, Instituto Superior Técnico, Portugal , 3 Adetti/iscte/dcti, Portugal , 4 Universidade Aberta (Portuguese Open University), Portugal ISBN: 972-8865-39-2