class Player extends Sprite {
  AnimImage image;
  public Player() {
    image = new AnimImage(loadImage("ship1.gif"), 24, 24);
    x = 120;
    y = 200;
    lastX = new float[ROTATE_SIZE];
    lastY = new float[ROTATE_SIZE];
    for (int i=0; i<ROTATE_SIZE; i++) {
      lastX[i] = x;
      lastY[i] = y;
    }
  }
  void draw() {
    beginShape(QUAD_STRIP);
    boolean flip = false;
    noStroke();
    for (int i=1; i<ROTATE_SIZE; i++) {
      fill(0,200,200,255 * (ROTATE_SIZE - i) / ROTATE_SIZE);
      int j = (rotateLast - i + ROTATE_SIZE)%ROTATE_SIZE;
      float x = lastX[j], y = lastY[j]+2*i;
      float dx = 5;
      if (flip) dx = -dx;
      vertex(x+dx,y);
      vertex(x-dx,y);
      flip = !flip;
    }
    endShape();
    
    int frame = 1;
    if (dx<-0.5) frame=0;
    else if (dx>0.5f) frame=2;
    image.draw(x-12,y-12,frame);
  }
  static final int ROTATE_SIZE = 50;
  float lastX[], lastY[];
  int rotateLast = 0;
  void update() {
    float ax = input.x * 4;
    float ay = input.y * 3;
    
    dx += (ax-dx)/10;
    dy += (ay-dy)/10;
    
    x+=dx;
    y+=dy;
    
    lastX[rotateLast] = x;
    lastY[rotateLast] = y;
    rotateLast++;
    if (rotateLast>=ROTATE_SIZE)
      rotateLast=0;
  }
}