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Presents a new, fully automated daylighting analysis workflow using Radiance/Daysim within the Rhinoceros/Grasshopper CAD modeling environment. To overcome these barriers and to make advanced, validated daylighting analysis methods available to the parametric design community at large, this paper 321
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RHINOCEROS 6 RENDERING MATERIALS MANUAL
The fact that several manual steps are usually required poses a real barrier for designers interested in automatically validating a large number of design variants. These workflows are hence somewhat difficulty to remember for casual users who just want to do an occasional ‘quick check’ of how well their current design performs. Many daylighting design analysis workflows involve several manual steps such as (1) exporting a geometry file to a temporary file format, (2) importing the file into a daylighting analysis program, (3) setting material properties and simulation parameters, (4) running the simulations and (5) importing the results back into the CAD program for data visualization. Given that green building rating systems such as the US Green Building Council’s LEED system (USGBC 2009) encourage the use of simulations, it is not surprising that design practitioners are increasingly reporting that they are using daylight simulations within their firms (Galasiu and Reinhart 2007). Shigemura 2009) Daylight simulations have of course been around for decades and an ever-growing number of design analysis workflows exist to convert scene geometries and materials definitions from just about any CAD modeler into various daylighting simulation packages. Changing the position of the points results in numerous two and three dimensional forms.
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This paper is concerned with the latter.įigure 1 Example of a Parametric Design Study using Rhinoceros/ Grasshopper: A relationship is established in which points generate a line which generates a surface. Performance aspects, most notably energy and daylighting. Given society’s increased focus on energy efficiency and occupant comfort, there is now also a growing need within the parametric design community to include sustainability–related Typical performance based design aspects that are already being considered are floor area ratios and/or other restrictions that are dictated by a site’s urban topography. Thus far, parametric design has been largely utilized for an aesthetic which emphasizes complex, continuously differentiated forms.
RHINOCEROS 6 RENDERING MATERIALS SERIES
An example series of forms is shown in Figure 1. The term refers to a practice of digitally modeling a series of design variants whose relationships to each other are defined through one or several mathematical relationships (parameters) which then form a parametric space which may comprise dozens or thousands of related but distinct forms. INTRODUCTION Parametric design has become a strong trend in contemporary architectural design practice and education (Day, 2010). The design workflow has been specifically developed with the architectural design process in mind, aiming to provide designers with immediate, high quality feedback all the way from schematic design to design development. a dynamic visualization of the effect of these design parameters on the daylight availability within the scene. Using the Grasshopper plug-in for Rhinoceros, key design parameters such as window size and material descriptions can be changed incrementally and the simulation results can be combined into an animated building performance simulation, i.e. The simulation results are automatically loaded back into the Rhinoceros scene using falsecolor mappings. A new, highly effective design workflow within Rhinoceros is presented that directly exports scene geometries, material properties and sensor grids into Radiance/Daysim format and calculates a series of performance indicators including monthly or seasonal solar radiation maps as well as daylight factor and daylight autonomy distributions.
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Fourth National Conference of IBPSA-USA New York City, New York August 11 – 13, 2010ĪNIMATED BUILDING PERFORMANCE SIMULATION (ABPS) – LINKING RHINOCEROS/GRASSHOPPER WITH RADIANCE/DAYSIM Kera Lagios, Jeff Niemasz and Christoph F Reinhart Harvard University, Graduate School of Design Cambridge, MA 02138 USAĪBSTRACT This paper describes the linking of the popular threedimensional CAD modeler Rhinoceros with advanced daylight simulations using Radiance and Daysim.