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Please use this identifier to cite or link to this item: http://hdl.handle.net/10362/4912

Título: Modelação de organismos com crescimento logarítmico: aplicação às amonites *
Autor: Barroso, F.
Kullberg, J. C.
Rocha, R. B.
Palavras-chave: Modelling tools
Ammonites
Animated models
Pixels 3d
Issue Date: 2007
Editora: Departamento de Ciências da Terra
Resumo: This work refers to the development of modelling tools to create Ammonite shells in order to produce animated models for scientific dissemination and didactic purposes. In the approach here proposed we assume that the growth of those shells from an initial stage – the protoconch – can be interpreted as a succession of revolutions in turn of a central axis; thus the conch’s section will increase as a non-linear progression. So, we emphasise that the shape of many type of shells, e.g. gastropods and bivalves, is based on the equation of the logarithmic spiral deduced by R. Descartes. Pixels 3d (Pixels Digital Inc., 2005) is a TCL – scriptable modelling and animation software that allows extendable interapplication communication. Hence a standalone prototype (Shellia) with shell assignable parameters was produced and some of their issues and results will be presented here.
URI: http://hdl.handle.net/10362/4912
Appears in Collections:FCT: DCT - Ciências da Terra

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