Hi,

In this programme all spots have the same x-position. I would like them to oscillate about random x-positions. But that not working?

1. int numSpots = 4;
2. int amplitude = 30;
3. float frequency = PI/120;
4. float angle;
5. //Declare and create the array
6. Spot[] spots = new Spot[numSpots];
7. void setup() {
8.   size(600, 300);
9.   smooth();
10.   noStroke();
11.   for (int i = 0; i < spots.length; i++) {
12.     float x = random(50, width-amplitude);
13.     float y = random(30, height/2);
14.     //Create each object
15.     spots[i] = new Spot(x, y, 3, frequency);
16.   }
17. }
18. void draw() {
19.   fill(0, 12);
20.   rect(0, 0, width, height);
21.   fill(255);
22.   for (int i = 0; i < spots.length; i++) {
23.     spots[i].move(); //Move each object
24.     spots[i].display(); //Display each object
25.   }
26. }
27. class Spot {
28.   float x, y, diameter, frequency;
29.   int direction = -1;
30.   //Constructor
31.   Spot(float xpos, float ypos, float dia, float fr) {
32.     x = xpos;
33.     y = ypos;
34.     diameter = dia;
35.     frequency = fr;
36.   }
37.   void move() {
38.     x =+ (sin(angle) + HALF_PI)*amplitude;
39.     angle += frequency;
40.   }
41.   void display() {
42.     ellipse(x, y, diameter, diameter);
43.   }
44. }

Line 38 is I think where the problem is.

I am new to OOP so any help would be greatly appreciated.

Thanks,

Shane