PL-System: Visual Representation of Pattern Language using L-System

Abstract

Pattern Language provides simple and conveniently formatted solutions to complex design problems ranging from urban planning to interior design for community-led inclusive designs. Despite the intention, the concept has been more widely adopted by computer science professionals. One possible reason is the lack of visualization, making it difficult to be used interactively by the nonprofessionals. To overcome the issue, we aim to integrate the patterns from Pattern Language into the L-system to visualize the paper architecture into geometric forms. Specifically, we implement Pattern L-System (PL-System), which generates diagrammatic floor plans using design rules based on the pattern languages. We first made analogical comparisons of the concepts and grammar structure between Pattern Language and the L-system. Next, we defined a geometric interpreter for drawing diagrammatic floor plans using turtle graphics, which consist of geometrical rules for putting shapes together. Then, we selected three patterns and reinterpreted them for visualization using strings of turtle graphics letters that determine the turtle’s movements for the geometric representation of walls, columns, and doors. From this research process, we learned that Modular L-system opens up the possibility for the visualization of the patterns in Pattern Language. © 2022, The Association for Computer-Aided Architectural Design Research in Asia.