7/14/2023 0 Comments Models for archicadThe façade template also provides an easier solution for generating façade models when compared to existing methods. Initial user tests have indicated that the parametric façade is more efficient than previous methods for creating accurate façade models from survey data. ![]() This enables the tools developed to utilise the full benefits of BIM software which includes automated construction or conservation documents, semantic object oriented objects based on IFC semantic classes, automatic lists of objects and material and the ability to add and link additional information to the model. The parametric façade template has also been implemented with the Geometric Description Language for ArchiCAD BIM software. Object can then be graphically edited individually or in groups to match the computer generated geometry to survey data. When automatically generating a façade, the initial position and size of elements are estimated using classical architectural proportions. Parametric architectural objects are automatically combined with rules to generate many different façade arrangements which are controlled by user parameters. The design of this parametric façade incorporates concepts from procedural modelling which is an automated approach to generating 3D geometries based on rules and algorithms. This parametric building facade can be used as a template for fast and efficient generation of BIM facade geometry. The second development which is described in more detail in this article is a complete parametric building façade. These parametric objects were built using an embedded programming language within the ArchiCAD BIM software called Geometric Description Language (GDL). The parametric architectural objects have been designed from historic manuscripts and architectural pattern books. These library objects are dynamic and have parameters that can instantly alter the shape, size and other properties of objects. The first is a new library of reusable parametric objects designed for modelling classical architectural elements from survey data. Two new developments for as-built BIM modelling are presented in this article. This article outlines a new semi-automatic approach for generating accurate BIM facade models for existing buildings from laser and image data. KEYWORDS: 3D, modeling, design, CAD, ArchiCAD, GDL scripting ![]() Also, GDL scripts offer unlimited shapes and options for those who are not afraid to familiarize themselves with scripting language. Finally, the main purpose, as stated, would be to give a minimal grasp on GDL objects, their creation, editing, export and import to and from other programs such as AutoCAD, 3D Studio Max or other rendering specialized platforms. ![]() For this purpose, some tools like the complex profile manager, the truss maker, roof maker and solid element operations would give an idea of how one can originally bypass some of the initially perceived limitations of the platform. The next chapters will be concerned with the creation, grouping and possibilities of editing some basic 3D objects in order to construct more elaborate objects that are not already available in ArchiCAD’s libraries. Following that, it would be necessary to mention some of the late version’s (ArchiCAD 13.0) improvements over the previous ones, methods that ease a lot the work effort of the designer and help better correlate all views like, for example, the trace option or 3D dimensioning. Also it would be needed to underline some differences in concept and workflow between Graphisoft’s ArchiCAD and the other BIM oriented platforms used today in architectural computer aided design, like AutoDesk’s AutoCAD, Revit or Nemetschek Allplan. For this, it would be interesting to attempt an introduction in the platform interface, a possible, rudimentary, explanation of how the program works and how it is used to develop the BIM (Building Informational Model) of a construction. The purpose of this paper would be to try and synthesize the various techniques employed for creating specially shaped, advanced 3D models in ArchiCAD, different from the ordinary methods available to general users of the program that can create basic shapes.
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