In the design of curve utilized for the styling of present industrial products, it is important to grasp the macroscopic shape information that emerges from the interaction of shape elements and to control it appropriately, due to the human characteristic of recognizing the whole shape feature macroscopically. However, in conventional curve design using CAD, the information that represents microscopic shape feature quantitatively is mainly displayed, and the macroscopic shape information is grasped and controlled based on the experience and intuition of the designer. From these backgrounds, we have advanced our research for the construction of quantification method of "complexity", the macroscopic shape information, and that of curved profile generation method that allows manipulation of "complexity." First, this paper summarizes the problems in macroscopic shape information research based on the viewpoint of multi-space design model, and shows the guideline of macroscopic shape information research as contrasting with the problems. Next, this paper reviews the knowledge of related research from a viewpoint of multi-space design model that is important for the research on macroscopic shape information "complexity", and describes guidelines of the research on "complexity."
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