Enumeration of the origami shapes with 4-times folding operations.
The lists were generated in below conditions.

• Folding techniques: Mountain, Valley, Making crease(Fold-and-Unfold, as One-time operation)
• Folding operations：Line passes through two points, Line that places p1 onto p2, Line that places l1 onto l2.
• Num. of foldings: 4

For the details, please refer to "Origami5".

1-fold (pdf)
2-fold (pdf), 2-fold without Making-crease operation (pdf)
3-fold (pdf), 3-fold without Making-crease operation (pdf)
4-fold without Making-crease operation (pdf, 12MB, 152pages)