//method to keep objects within screen
/// <summary>
/// Ensures that object is within top and bottom bounds of the screen, targeted to be used with player object but can take any GameEntity object
/// </summary>
/// <param name="obj">Any GameEntity object to be checked and kept within top and bottom of screen</param>
public void screenLimit(GameEntity obj)
{
if (obj.pos.Y <= 0 ) //at top wall
obj.pos.Y = 0; //if closer than the 0 that means Sprite would go outside, so reset
if (obj.pos.Y >= (Game1.Instance.Window.ClientBounds.Height )) //at bottom wall
obj.pos.Y = (Game1.Instance.Window.ClientBounds.Height ); //reset if too close to bottom wall, same as other
}
//if enenmy hit by player Check
/// <summary>
/// Checks if the enemy was hit by player bullet, removes the enemy and bullet if so
/// </summary>
/// <param name="obj">Any GameEntity (enemy,comet,etc.) object to be checked</param>
void enemyHit(GameEntity obj)
{
for (int i = 0; i < playerBullet.Count; ++i) //for all player bullets
{
if (playerBullet[i].me.Intersects(obj.me)) //if player bullet intersects object currently checked
{
score += obj.scoreGain; //increase score
enemyList.Remove(obj); //remove object(enemy only takes one shot
playerBullet.Remove(playerBullet[i]); //remove bullet
--i; //fix index
}
}
}
//checks if obj has passed by the left wall
/// <summary>
/// Checks if an enemy has passed by the player to the left and returns a boolean
/// </summary>
/// <param name="obj">Object that will be checked if it has passed by the player to the left</param>
/// <returns></returns>
public bool enemyPassed(GameEntity obj)
{
if (obj.pos.X <= -obj.Sprite.Width / 2)
return true;
return false;
}