Hinge crease

Post is a part of a larger series (Creases): Hinge crease Ridge crease Axial creases A hinge crease serves two purposes. By definition, a Hinge crease is a line that defines polygons by the mere fact it surrounds it. Also, a hinge crease is a line around which a flap can rotate. Hence the name. It looks similar…

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Maekawa-Justin and Kawasaki-Justin theorems are not enough

Post is a part of a larger series (Design process): Origami design process (introduction) Origami design process – Part 2 Origami and circles Relationships between basic elements of an origami model Maekawa-Justin and Kawasaki-Justin theorems are not enough How to hide an unused paper in your Origami model? Can central flaps be free? Why is central fold opening…

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Can central flaps be free?

Post is a part of a larger series (Design process): Origami design process (introduction) Origami design process – Part 2 Origami and circles Relationships between basic elements of an origami model Maekawa-Justin and Kawasaki-Justin theorems are not enough How to hide an unused paper in your Origami model? Can central flaps be free? Why is central fold opening…

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Relationships between basic elements of an origami model

All basic elements of an origami model (flaps and rivers) must be in the same relationship, both on the stick figure and the crease pattern. Reason is quite simple. Both stick figure and crease pattern are a graphical representation of the same future model. Therefore, it is not possible for a crease pattern to show one thing and for a stick figure to show something else.

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Elias stretch

Elias stretch is an origami manoeuvre that is often used while collapsing origami models based on the Box pleating technique. It was named after Neal Elias, who popularized it in the 1970s. The technique is very simple and is used to assemble flaps (polygons) located on the paper edge. Basically, wherever you have a polygon that forms a flap and it is located on the paper edge, you can use Elias stretch manoeuvre to collapse that polygon.

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How to hide an unused paper in your Origami model?

In this blog post, I would like to address the problem of unused parts of a paper. This problem is not uncommon in origami. As a matter a fact, you will stumble upon it quite a lot, and in this regard box pleating technique is no exception. Simply, when polygons and rivers are arranged on a square piece of paper, it is very likely that part of a paper will be left unused.

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