Question

I am making a game for the Windows Phone using XNA framework C#.

The main player in the game has to shoot. I have a bullet class, but how do you instantiate that bullet everytime the user clicks on the screen?

The bullet class basically draws itself and has a function called “Shoot”, this is used for the bullet to move in the direction of the player.

I am a noob at c# xD

Answer 1

A common method is in your game loop add in a check for the screen being touched and take action if it is.

For XNA, on the Game class (which I think is called Game1 by default) create a field to store whether the screen was touched on the previous Loop:

bool screenBeingTouched = false;

This is to prevent multiple bullets being created on a single touch (unless that is what you want).

Then in the Update method of the Game class check to see if the screen is currently being touched and take action:

TouchCollection newScreenTouches = TouchPanel.GetState(); 

if (!screenBeingTouched && newScreenTouches.Count > 0)  
{  
    screenBeingTouched = true;  

    Bullet myBullet = new Bullet();
    myBullet.DoSomething(); // Such as render on the screen and move around.

}  
else if (newScreenTouches.Count == 0)  
{  
    screenBeingTouched = false;  
}