class CAR {
  color colour;
  float x;
  float y;
  float v;
  float a;
  float angle;
  float maxspeed;
  
  CAR(color colourTemp, float xPos, float yPos, float velocity, float acceleration, float angleTemp, float maxspeedTemp) {
    colour = colourTemp;
    x = xPos;
    y = yPos;
    v = velocity;
    a = acceleration;
    angle = angleTemp;
    maxspeed = maxspeedTemp;
  }
  
  void move(){
    x+=v;
    if (x>width){
      x = 0;
    }
  }
  
  void display(){
    fill(colour);
    rect(x,y,50,20);
  }
}

int nCarsMade = 0;
CAR [] carsArray;
int col = 1000;

void setup(){
  size(400,400);
  carsArray = new CAR[col];
  noStroke();
  rectMode(CENTER);
}

void draw(){
  background(0);
  for (int x=0; x<nCarsMade; x++){
    float maxSpeed = carsArray[x].maxspeed;
    float angle = carsArray[x].angle;
    float acceleration = carsArray[x].a;
    carsArray[x].v=maxSpeed*sin(angle/acceleration)+maxSpeed;
    float dVdAngle = maxSpeed*cos(angle/acceleration);
    if (dVdAngle>0){
      carsArray[x].colour = color(0,255,0);
    }
    else {
      carsArray[x].colour = color(255,0,0);
    }
    carsArray[x].angle+=0.1;
    carsArray[x].move();
    carsArray[x].display();
  }
}

void mousePressed(){
  if (nCarsMade!=col){
    carsArray[nCarsMade] = new CAR(color(0,0,0),mouseX,mouseY,0,random(10),random(TWO_PI),random(10));
    nCarsMade +=1;
  }
}