It represents a detailed surface as the output of a subdivision surface in combination with a scalar field (a displacement map) applied to a parametrization of the model. The DSS is then a variable level of detail surface, or smooth domain surface, with a height field applied. By means of a render-to-texture process, or “baking” it is possible to convert a detailed geometric model (from photogrammetry or laser scanner) into such a representation. DSS is than a faithful expression of a detailed model and it offers several benefits, including geometry compression, editing, animation, scalability, and adaptive rendering. The encoding of fine detail by means of a scalar function makes the representation extremely compact. OpenExr file format allows the possibility to store inside a HDR image high frequency details that a common greyscale bitmap could not achieve.
Published in Chapter:
The Maritime Theatre at Hadrian's Villa and Its Decoration: Analysis, Interpretation, and Integration of Digital Models
Benedetta Adembri (Istituto Autonomo Villa Adriana e Villa d'Este, Italy), Luca Cipriani (Alma Mater Studiorum Università di Bologna, Italy), and Filippo Fantini (Alma Mater Studiorum Università di Bologna, Italy)
Copyright: © 2019
|Pages: 31
DOI: 10.4018/978-1-5225-7555-9.ch010
Abstract
Maritime Theatre is one of the most iconic buildings of Hadrian's Villa (UNESCO site since 1999). This circular-shaped “domus” is characterized by one of the most obvious aspects of Hadrianic architectural production, namely the alternation of curved and straight lines applied to designing both plans and elevations. Mixtilinear features caught the interest of architects from the Renaissance to present day, becoming inspiration as well as a sort of “quarry” for noble families and antiquarians. Complex entablatures designed by Hadrian's architects have been systematically removed and reused starting from Middle Ages with the consequence of having several fragments scattered in private and public collections all over Europe. Through a systematic digital survey of remaining structures as well as of removed elements, a 3D analytical model was exploited in order to include all the “digitally gathered” elements and for deepening the knowledge of this emblematic mixtilinear architecture.