Building information modelling – A novel parametric modeling approach based on 3D surveys of historic architecture

Building Information Modelling (BIM) appears to be the best answer to simplify the traditional process of design, construction, management and maintenance. On the other hand, the intricate reality of the built heritage and the growing need to represent the actual geometry using 3D models collide with the new paradigms of complexity and accuracy, opening a novel operative perspective for restoration and conservation. The management of complexity through BIM requires a new management approach focused on the development of improve the environmental impact cost, reduction and increase in productivity and efficiency the Architecture, Engineering and Construction (AEC) Industry. This structure is quantifiable in morphological and typical terms by establishing levels of development and detail (LoDs) and changes of direction (ReversLoDs) to support the different stages of life cycle (LCM). Starting from different experiences in the field of HBIM, this research work proposes a dynamic parametric modeling approach that involves the use of laser scanning, photogrammetric data and advanced modelling for HBIM

Preserving Design Intent in Feature-Based Parametric CAD Data Exchange

Part 8: Knowledge Management and Information SharingInternational audienceThe proliferation of 3D technology on many different platforms has made CAD data exchange vital to industrial engineering innovation. The need to share and integrate CAD data, information, and knowledge amongst systems involved in product development has become an important requirement. This requirement is largely determined by a proper communication of design intent, which is usually expressed implicitly within CAD models or tacitly as experiential knowledge from domain experts. However, solutions for CAD data exchange are mostly restricted to the exchange of pure static shape information, restricting their applicability in many downstream processes. This paper suggests methods and strategies for preserving design intent in CAD data exchange. A test case is undertaken to demonstrate the idea and as evidenced in the results, the method proposed helps in capturing and preserving design intent

Subdivision invariant polynomial interpolation

Abstract. In previous works a polynomial interpolation method for triangular meshes has been introduced. This interpolant can be used to design smooth surfaces of arbitrary topological type. In a design process, it is very useful to be able to locate the deformation made on a geometric model. The previously introduced interpolant has the so-called strict locality property: when a mesh vertex is changed, only the surface patches containing this vertex are changed. This enables to locate the deformation at the size of the input triangles. Unfortunately this is not sufficient if the designer wants to add some detail at a smaller size than that of the input triangles. In this paper, we propose a modification of our interpolant, that enables to arbitrary refine the input triangulation, without changing the resulting surface. We call this property the subdivision invariance. After refinement of the input triangulation, the modification of one of the vertices will change the shape of the interpolant at the scale of the refined triangulation. In this way, it is possible to add details at an arbitrary fine scale. 1

Barbara Thimm / Gottfried Kößler / Susanne Ulrich (Hrsg.): Verunsichernde Orte. Selbstverständnis und Weiterbildung in der Gedenkstättenpädagogik. Frankfurt am Main: Brandes und Apsel 2010 (207 S.) [Rezension]

Rezension von: Barbara Thimm / Gottfried Kößler / Susanne Ulrich (Hrsg.): Verunsichernde Orte. Selbstverständnis und Weiterbildung in der Gedenkstättenpädagogik. Frankfurt am Main: Brandes und Apsel 2010 (207 S.; ISBN 978-3-86099-630-0; 19,90 EUR)