Abstract
The structural and design parts should be considered because the free-formed structures have the unformal and irregular shapes. Especially, the initial design for the free-formed structures should be performed through the various structural pattern creation. To this end, this study creates the structural patterns of free-formed structures using the biological algorithm for L-system model of morphogenesis technique. Also, the free-formed structural shapes are classified as the internal and external patterns with the connection method, and the various structural patterns are created by applying the parameters through the assumption of joint coordinates for the final string arrays.