StartingScreenTrain.pde

float[] offsets = {0, 30, 30, 250, 60, 60, 60, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30};

PImage[][] sprites = {
  knight_m_run_anim, 
  elf_m_run_anim, 
  wizzard_m_run_anim, 

  big_demon_run_anim, 
  ogre_run_anim, 
  big_zombie_run_anim, 

  chort_run_anim, 
  wogol_run_anim, 
  necromancer_run_anim, 
  orc_shaman_run_anim, 
  orc_warrior_run_anim, 
  masked_orc_run_anim, 
  ice_zombie_run_anim, 
  zombie_run_anim, 
  swampy_run_anim, 
  muddy_run_anim, 
  skelet_run_anim, 
  imp_run_anim, 
  goblin_run_anim, 
  tiny_zombie_run_anim
};


class Train {

  boolean isRight;

  float x, y;
  float vx;
  float sx, sy;
  float xi,  xf;

  float[] locations;
  public Train(float x, float y, float vx, float sx, float sy, float xi, float xf) {
    this.x = x;
    this.y = y;
    this.vx = vx;
    this.sx = sx;
    this.sy = sy;
    this.xi = xi;
    this.xf = xf;
    isRight = vx > 0;

    locations = new float[offsets.length];
    locations[0] = x;
    for (int i = 1; i < offsets.length; i++) {
      locations[i] = locations[i-1] + (isRight ? -offsets[i] : offsets[i]);
    }
  }

  void step() {
    for (int i = 0; i < offsets.length; i++) {
      locations[i] += vx;
    }
  }

  void show() {
    pushStyle();
    imageMode(CORNERS);
    for (int i = 0; i < offsets.length; i++) {
      pushMatrix();
      float h = sy*sprites[i][0].height;
      translate(locations[i], y - h);
      scale(sx, sy);
      image(sprites[i][(frameCount/8)%sprites[i].length], 0, 0);
      popMatrix();
    }
    popStyle();
  }

  boolean isDone() {
    return isRight ? locations[locations.length-1] > xf : locations[locations.length-1] < xf;
  }
}