Randomized Vectors – Example 6.4


If you’ve stuck with the examples this far, this one should prove pretty easy. I am showing it here for a bit more practice with vectors and data structuring, but this will serve as a base for a Recursive pattern script in the next series of examples.

Step One – Setup a base grid of points. Setup a starting rotation for the vectors at each point. The logic is similar, but executed in a slightly different way than the starting vector in Example 6.3.

Step Two – I could just random rotate all the vectors at once by flattening the grid, but for this example I wanted to control the “noise” or degree of random rotation for the rows and columns independently. I started with two variables which I called “Row Distortion” and “Column Distortion.”  A value of “20” for row distortion means then, that the first range of rotations, based on rows, can have a rotation between -20° and 20° Since i didn’t flatten my data structure, after the first set of random rotations, each item in every row will have the same rotation. To rotate the vectors, use the “Rotate Vector” component.

Step Three – Now I want to do the same thing for the columns. All I have to do is use the “Flip Matrix” component to change the way the points are arranged in the data structure, and then do another series of random rotations.

Step Four – The last thing to do is to draw a line using the “SDL” component. The Start will be the grid points, the Direction will be the rotated vectors, and the Length will be just a variable based on the sliders.

Below are some images of variations based on this script.


The grasshopper script…


Click Here to Download GH Script