mover_study2.pde

Mover m;
float num = 20;
int xSize, ySize;
ArrayList<Mover> movers = new ArrayList<Mover>();

void setup() {
  size(500, 500);
  colorMode(HSB, 360, 100, 100, 100); 
  background(0, 0, 100);
  rectMode(CENTER);
  xSize = (int)(width/num);
  ySize = (int)(height/num);
  for (int i = 0; i < 50; i++) {
    int x = (int)(random(num))*xSize;
    int y = (int)(random(num))*ySize;
    m = new Mover(x, y, 0);
    movers.add(m);
  }
}

void draw() {
  fill(0, 0, 100, 100);
  rect(width/2, height/2, width, height);
  float sum = 0;
  for (Mover m1 : movers) {
    m1.update();
    int n = m1.checkMovers(movers);
    m1.draw();
    sum += n;
  }
  drawGrid();
}
void mousePressed() {
  redraw();
}
void drawGrid() {
  stroke(0, 0, 0);
  strokeWeight(0.1);
  for (int i = 0; i < ySize; i ++) {
    line(0, i*ySize, width, i*ySize);
  }
  for (int i = 0; i < xSize; i ++) {
    line(i*xSize, 0, i*xSize, height);
  }
}
public class Mover extends PVector {
  int id;
  int status;
  color c;
  public Mover(float x, float y, int id) {
    this.x = x;
    this.y = y;
    this.id = id;
    this.status = 0;
    c = color(220, 80, 100);
  }
  public void update() {
    int direction = (int)random(100);
    switch(direction) {
    case 0:
      break;
    case 1:
      x -= xSize;
      y -= ySize;
      break;
    case 2:
      y -= ySize;
      break;
    case 3:
      x += xSize;
      y -= ySize;
      break;
    case 4:
      x -= xSize;
      break;
    case 5:
      x += xSize;
      break;
    case 6:
      x -= xSize;
      y += ySize;
      break;
    case 7:
      y += ySize;
      break;
    case 8:
      x += xSize;
      y += ySize;
      break;
    }
    if (x < 0) {
      x += width;
    }
    if (y < 0) {
      y += height;
    }
    if (x >= width) {
      x -= width;
    }
    if (y >= height) {
      y -= height;
    }
  }
  public int checkMovers(ArrayList<Mover> movers) {
    int closeNum = 0;
    for (Mover m2 : movers) {
      if (this.equals(m2) == false) {
        float dist = this.dist(m2);
        if (dist < 50) {
          closeNum++;
        }
      }
      switch(closeNum) {
      case 0:
        this.c = color(180, 80, 0);
        break;
      case 1:
        this.c = color(150, 80, 20);
        break;
      case 2:
        this.c = color(120, 80, 40);
        break;
      case 3:
        this.c = color(90, 80, 80);
        break;
      case 4:
        this.c = color(60, 80, 100);
        break;
      case 5:
        this.c = color(30, 80, 100);
        break;
      case 6:
        this.c = color(0, 80, 100);
        break;
      }
    }
    return closeNum;
  }

  public void draw() {
    fill(c);
    rect(x+xSize/2, y+ySize/2, 25, 25);
  }
}