Drawing dots with Fibonacci

drawing_dosts_with_fibonacci.pde

import java.util.*;

Fibonacci fibonacci;
float unitAngle;
float unitFibonacciAngle;

int NUM_POINTS = 90;
float NUM_DISTANCE_FROM_APEX = 1;

class Fibonacci {
  List<Long> array = new ArrayList<Long>();

  Fibonacci(int index) { 
    array = generateFibonacciArray(index);
  }
  
  private List<Long> generateFibonacciArray(int index) {
    if(array.size() != 0) return array;
    
    for(int i = 0; i <= index; i++) {
      if(i == 0) {
        array.add((long)0);
      }else if(i == 1) {
        array.add((long)1);
      } else {
        array.add(array.get(i - 2) + array.get(i -1));
      }
    }
    return array;    
  }
  
  public float diff(int i) {
    if(i == 0 || i == 1) return 0;
    
    return (float)array.get(i) / (float)array.get(i - 1);
  }
} 

  
void setup() {
  size(300, 300);
  noLoop();
  
  unitAngle = TWO_PI * (1 + sqrt(5)) / 2;
  fibonacci = new Fibonacci(NUM_POINTS);
}
  
void draw() {
  background(0);
  noStroke();
  float r, x, y;
  float angle;
  
  for(int i = 0; i < NUM_POINTS; ++i) {
    angle = unitAngle * i;
    
    r = i * NUM_DISTANCE_FROM_APEX;
    x = 150 + r * cos(angle);
    y = 150 + r * sin(angle);
    fill(255, 255, 255, 200);
    ellipse(x, y, 4, 4);
    
  }
  
  for(int i = 0; i < NUM_POINTS; ++i) {
    // With real Fibonacci value
    angle = (TWO_PI * fibonacci.diff(i)) * i;
    println(i + ": " + fibonacci.array.get(i) + ": " +  fibonacci.diff(i));
    
    r = i * NUM_DISTANCE_FROM_APEX;
    x = 150 + r * cos(angle);
    y = 150 + r * sin(angle);
    fill(255, 128, 128, 150);
    ellipse(x, y, 4, 4);
  }
}

generated image file https://www.diigo.com/item/p/qpeeeqszbseacqcabzbceapdep