Hello,

I am trying to achieve a grid of normalized vectors.
Just for the first step I want a grid of normalised lines that could show the direction where the mouse is.
For example, the wind diagram is what I image as the result (where little arrows show directionality of the wind).
Just like in D.Shiffman's book cover: ---> D.S. BOOK COVER.

I tried a script  written by Daniel Shiffman. He uses PVector in explaining vector logics in processing.
So what I tried was: an addition to the code using "for"loop to get a grid of points.

But when I tried to normalize a grid of lines , I did not get the result I wanted.

1st script is Daniel Shiffman script,
2nd script is written by me.

Why it does not work? And I really need Vector not coordinates, really....
Thank you in advance:)

1. void setup() {
     size(800,200);
     smooth();
   }
   
   void draw() {
     background(255);
    
     // A vector that points to the mouse location
     PVector mouse = new PVector(mouseX,mouseY);
     // A vector that points to the center of the window
     PVector center = new PVector(width/2,height/2);
     // Subtract center from mouse which results in a vector that points from center to mouse
     mouse.sub(center);
    
     // Normalize the vector
     mouse.normalize();
    
     // Multiply its length by 50
     mouse.mult(150);
   
     translate(width/2,height/2);
     // Draw the resulting vector
     stroke(0);
     strokeWeight(2);
     line(0,0,mouse.x,mouse.y);
    
   }