## Perimeter theorem

The Perimeter theorem, even though being an unusual origami concept, is very intuitive and easily applicable. I believe that anybody interested in understanding origami should apprehend that exciting concept. I had never intended to write about the perimeter theorem until I wrote the blog post “Hatsune Miko and colour change”.  But since the very first question I got…

## Hatsune Miku and colour change

Hatsune Miku by Itagaki Yuichi is a fascinating model. Not only that, it accurately depicts the original Anime character, but it also implements a nice colour changing method that deserves a detailed explanation. Figure 1Figure 1 - Hatsune Miku and its baseFigure 1 The Crease pattern (figure 1) of this model is freely available on the Itagaki Yuichi…

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## Pythagorean stretch – advanced topic (no.1)

In this blog post, I will show you what could happen if we move a Pythagorean stretch element toward the non-square polygon.

## Walking in the rain – analysis

Walking in the rain by Chen Xiao (Twitter. Flickr) is one of his most fascinating and, at the same time, one of his simplest models. Figure 1 - Waking in the rain by Chen Xiao I have to say that, for this model, only the crease pattern is available on the Internet. Unfortunately,  the available crease pattern is…

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## Level shifters

Post is a part of a larger series (Advanced concepts): Elias stretch Pythagorean stretch Pythagorean stretch - advance concept (no.1) Level shifters How to Collapse Box Pleated Crease Pattern? Anyone who has ever tried to design box pleated origami models knows that those models have rather narrow flaps. This feature doesn't have to be a problem, quite a…

## Universal molecule

Post is a part of a larger series (Uniaxial base): Traditional Origami Bases Uniaxial base Universal molecule Rabbit ear If you have ever tried to design a uniaxial base using circle packing method, then you probably know that process is based on the so-called divide and conquer approach. To make the long story short: all crease patterns of…

Uniaxial base

## Uniaxial base

What is a uniaxial base? Post is a part of a larger series (Uniaxial base): Traditional Origami Bases Uniaxial base Universal molecule Rabbit ear Every origami model, no matter how complex, has a base in its core. Those bases can vary in their complexity, from simple traditional origami bases to complex custom made bases that can be seen…

## Crease pattern

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 How to hide an unused paper in your Origami model? Can central flaps be free? Why is central fold opening so popular? Crease…