After deciding the message that you want to deliver, the next step is to design or construct the drawing that bundling the message.
Before i continue, i want to talk about something called nodal constraint.
hmmm. Its a curious word, really.
Nodal constraint is refer to the interdependency of the position of one node to the overall design. Changing coordinate of this nodal constraint will affect the overall design..
By this, I mean that if your crop design is using for example 10 non concentric circles, you must first has to mark precisely the position at the field where are the center of those 10 circles before you begin your work. One mistake in placing the center pivot of each circle will result in a highly ridiculous crop circle ever.
Ok, lets continue again.
As we all know that crop circle formation is basically composed of circle or arc either as the main object (something you must draw) or auxilliary object (you must draw it in order to create another object or a segment line). As an auxilliary object, the circle can be used to draw equilateral triangle, square, pentagon, star, hexagon and all kind of polygon.
To draw a cirle there are two thing that has to be fulfilled: the position of the center circle and the diameter of the circle (2 constraints with one nodal constraint, i.e : center pos), meanwhile to draw an arc beside center pos and dia, you must define the position of where its start and end (4 constraints with 3 nodal constraints, i.e: pos of center, start point and end point).
Now, let see what would happens if one of the nodal constraint change its position. Let say, the position of center arc change.
So, we can see that the geometry of the design is changing. And the end of arc line also can no longer placing its original position, its got to move in order to maintain the arc diameter constant.
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