Udacity Project

app.js

Enemy_Rock.prototype.update = function(dt) {
  this.x += this.speed * dt;
  if (this.x >= 505) {
    this.x = 0;
  }
  checkCollision(this);
};

Enemy_Rock.prototype.render = function() {
  ctx.drawImage(Resources.get(this.sprite), this.x, this.y);
};

// Update the enemy's position, required method for game
// Parameter: dt, a time delta between ticks
Enemy.prototype.update = function(dt) {
  // You should multiply any movement by the dt parameter
  // which will ensure the game runs at the same speed for
  // all computers.
  this.x += this.speed * dt;

  // 505 defines the width of the Canvas.
  // The code that initializes the left end again when the enemy is struck at the right end.
  if (this.x >= 505) {
    this.x = 0;
  }
  checkCollision(this);
};

// * Draw the enemy on the screen, required method for game
Enemy.prototype.render = function() {
  ctx.drawImage(Resources.get(this.sprite), this.x, this.y);
};