// explosion.js
//  An explosion and a cleft on a map.
var ebicon = new GIcon;
ebicon.shadow = "images/dummy_shadow.png";
ebicon.iconSize = new GSize(32, 32);
ebicon.shadowSize = new GSize(1, 1);
ebicon.iconAnchor = new GPoint(16, 16);
var eicons = new Array;
for (var i = 0; i < 6; i++) {
  var eicon = new GIcon(ebicon);
  eicon.image = "images/explosion" + i + ".png";
  eicons.push(eicon);
}
var cicon = new GIcon(ebicon);
cicon.image = "images/cleft.png";

function Explosion() {
  this.onGround;
  this.cnt;
  this.exists = false;
  this.marker = new GMarker(
    new GPoint(mapManager.centerX, mapManager.centerY), eicons[0]);

  this.set = function(point, onGround) {
    if (this.exists)
      return;
    this.marker.point.x = point.x;
    this.marker.point.y = point.y;
    this.onGround = onGround;
    this.cnt = 0;
    this.exists = true;
    map.addOverlay(this.marker);
    this.updateMarker();
  }

  this.updateMarker = function() {
    this.marker.remove();
    this.marker.icon = eicons[this.cnt];
    this.marker.initialize(map);
    this.marker.redraw(true);
  }

  this.update = function() {
    if (!this.exists)
      return;
    this.cnt++;
    if (this.cnt == 3 && this.onGround) {
      var c = getCleftInstance();
      if (c != null)
        c.set(this.marker.point);
    } else if (this.cnt > 5) {
      this.exists = false;
      map.removeOverlay(this.marker);
      return;
    }
    this.updateMarker();
  }
}

function Cleft() {
  this.exists = false;
  this.marker = new GMarker(
    new GPoint(mapManager.centerX, mapManager.centerY), cicon);

  this.set = function(point) {
    this.marker.point.x = point.x;
    this.marker.point.y = point.y;
    this.exists = true;
    map.addOverlay(this.marker);
  }

  this.update = function() {
    if (!this.exists)
      return;
    if (this.marker.point.x < mapManager.bounds.minX ||
        this.marker.point.x > mapManager.bounds.maxX ||
        this.marker.point.y < mapManager.bounds.minY ||
        this.marker.point.y > mapManager.bounds.maxY) {
      this.exists = false;
      map.removeOverlay(this.marker);
      return;
    }
  }
}