## 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.

Nevertheless, even though this statement is absolutely correct, sometimes it seems, and I repeat “it seems” that this is not always the case.

## Stick figure

But, before I start analysing one such a seemingly odd and incorrect case, I believe it is necessary to give a clear and fully understandable definition of a stick figure.
A stick figure is a very simplified representation of a base of an origami model. A stick figure shows all flaps and rivers, also it shows relations between them. Also, a stick figure shows lengths of all flaps as well as widths of all rivers. What a stick figure doesn’t show is flaps width.
Nevertheless, to be sure we you understand what a stick figure is, let’s look at one very simple example and compare it with its stick figure (look at Figure 1). As you can see relation between the model and the stick figure is more than obvious.

## Simple rule

If you take a good look at the crease pattern of our simple model (Figure 2) you will see that the polygons (e.g. A and B) that define flaps on the crease pattern touch each other. The same can be seen on the stick figure. Flaps A and B touch each other as well. It is logical, isn’t it. Also, a river that divide flaps A and B from the flaps C, D and E, is doing the same.
So, I believe that the logic behind this is quite clear: elements of an origami models (flaps and rivers) must be in the same relationship to each other both on a stick figure and on a crease pattern.

## Seemingly odd example that does not follow the rules

Now, that we managed to define what a stick figure is, we can proceed further by examining one interesting example. On Figures 3 and 4 one such an example is shown.