Construction and analysis of easily fold-able processes for computer-aided origami

This paper proposes an approach to constructing instructional contents of origami that beginners are able to comprehend easily and perform folding operations naturally. First, we explain an instruction model which records processes of folding operations. In order to identify the process which can be folded most easily, multiple ways of processes are simulated and are constructed in the instruction model. Second, a method for simplifying the folding process presented in instruction diagrams published in common origami drill books is described. The method is provided to standardize notations of the instruction diagrams designed by various origami creators. Third, a method for analyzing the complexity of the existing process and constructing the more easily fold-able process by adding the "pre-creasing" operation before complex operations is proposed. Finally, in order to save labor expended to construct the processes, a support tool of editing instructional data is developed.