<p><strong>Abstract.</strong> The contribution is part of an interdisciplinary research that aims to address the problems of knowledge, interpretation and documentation of vulnerable structures such as the brick Renaissance domes in Campania (XV-XVI century). The goal is to analyze the relationship between Survey, Historic Building Information Modelling (HBIM) and 3D parametric models based on geometric rules from Treaties to study and to manage Cultural Heritage. HBIM is generally based on scan-to-BIM process that allows to generate 3D model from point cloud. The reverse modeling process, from a point cloud to parametric geometric model, poses a series of issues at the center of cultural debate that currently takes place around HBIM. The experimentation underway is part of this research field with the aim of using the parametric approach as a tool able to introduce an additional methodology for big data interpretation. Currently we can identify two different approaches for the construction of a HBIM system: building a simplified model by identifying the shape grammar or building the geometric components from survey without using pre-compiled objects libraries, following the scan to BIM logic. In our research we are going to identify an "hybrid" methodology. Generally the process is based on the knowledge and critical abilities of individual scholars, the idea is to increase the efficiency of the system through collaborative workflow forms that allow to optimize the processes through effective knowledge management actions. We are going to use procedural modeling techniques to generate HBIM domes library.</p>

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xxii congresso da sociedade iberoamericana de gráfica digital 22th conference of the iberoamerican society of digital graphics 07|08|09|novembro|2018 iau usp | são carlos | sp br

This paper presents some results of research aimed at defining a parametric tool for modelling complex decorative apparatuses of domes based on geometric rules definition and building techniques. MaTiDo, Majolica Tiles on Domes, is an adaptive tool that allows a user to place “fish scale” on revolution domes and oval or elliptical ones, on domes with ribs and domes without ribs. MaTiDo can be used to reproduce the look of the real domes and virtually reconstruct domes modified or destroyed. These ideal models are suitable for different uses, for Cultural Heritage dissemination or in HBIM process. The main geometric problem to address is how to evenly distribute on doubly curvature surfaces flat tiles that are all the same size. MaTiDo is being developed for colour automatic distribution on tiles in order to generate different decorative patterns on extrados dome surfaces.