Form Finding Architectural Shading Device: Reinterpretation of Batik Pattern through Parametric Approach

Abstract

Abstract The use of technology is a big opportunity to explore architectural design. This research examines the possibility of form-finding process by using computational design approach to generate shading devices that can represent local identity and provide efficient energy use of the building. Some examples of geometric Batik patterns found on the local screen used in one of the Indonesian traditional houses will be transformed into perforated shading devices. The process consists of three stages: understanding the symmetry group of each pattern with crystallographic chart analysis, generating a digital mesh of the objects by using photogrammetry method, and reinterpreting the object mesh to the perforated panel using parametric approach. The result shows that Banji pattern on p4gm symmetry group, while Kawung pattern on p4mm, Parang pattern on p1, and Nitik pattern on c2mm. On the photogrammetric stage, the digital three-dimensional meshes are successfully formed by using 13-19 overlapping photographs of the objects. From the last stage, perforated batik pattern panels are generated and it is possible to set the perforation percentage to reach desired WWR value. This experiment indicates that the use of computational design is possible to develop the local ornaments into a controllable perforated shading device.