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/**
 * @fileoverview  This file defines the VerticalPad class.
 */

/**
 * A Vertical Pad you can run on. These things oscillate between their starting
 * position and a z of 350"
 */
function VerticalPad(initObj) {
  this.absorbNamedValues(initObj);
  this.maxSpeed = 4 * 20;
  this.moveAmount = 4 * 20;
  this.bottomZ = this.z;
  this.topZ = 350;
  this.width = 42;
  this.height = 10;
}
VerticalPad.prototype = new Actor;

VerticalPad.prototype.onTick = function(timeElapsed) {
  // I bounce back and forth between the left and right points on my platform.
  if (this.z < this.bottomZ) {
    this.moveAmount += 1;
  } else if (this.z > this.topZ) {
    this.moveAmount -= 1;
  } else if (this.moveAmount >= 0) {
    this.moveAmount = this.maxSpeed;
  } else {
    this.moveAmount = -this.maxSpeed;
  }

  // I match my rotation to that of my platform.
  var myPlatform = world.platforms[this.platformID];
  this.rotZ = myPlatform.rotZ;


  this.z += this.moveAmount * timeElapsed;

  // If I collide with the avatar, then move the avatar along with me,
  // and set his "override" groundZ to be my own Z.
  if (this.collidesWith(avatar)) {
    if (avatar.velZ <= 0 && avatar.z >= this.z - 45) {
      avatar.z = this.z
      if (this.moveAmount < 0) {
        avatar.z += this.moveAmount * timeElapsed;
      }
      avatar.groundZ = avatar.z;
    }
  }

  updateActor(this);
}