CG Representations of Four-Dimensional Origami

- Stereogram of Four-Dimensional Traditional Origami Crane -

Abstract

Four-dimensional space is the space whose fourth axis is perpendicular to our three-dimensional space. We have studied four-space Origamis: Noshi and Orizuru, and its CG representation. First we show how to fold four-space Origami, and how to make mountain and valley folds after defining inside and outside of four-space Origami. Secondly we show how to represent two kinds of hidden lines by using of CG image of four-space Origami architecture. Thirdly we apply the U-buffer algorithm with the stereogram to making CG images of four-space Orizuru when it is opening its wings.