Hi All,

I'm a dabbling Shockwave Developer, and I'm very new to C# so please humour me :). I also have poor technical jargon skills, and am thus  more than likely to be misusing it. I appologise in advance.

I'm trying to store instances of my bullet class into an array, so that I can generate them on the cuff:

Here is my bullet spawning code.

 

public Bullet bullet;

public Bullet[] myBullets;//Array for instances?

public Bullet makeBullet(Vector3 pos,Vector3 rot)

{

bullet = new Bullet();

bullet = bullet.Setup(myGens, this,pos, rot);

myBullets[1] = bullet;//bullet;//problems!

return (bullet);

}

.. And Here is my bullet class, working fine barr the fact that only one lonely bullet is currently working.

public class Bullet

{

private Vector3 pos;

private Vector3 rot;

private Vector3 velocity;

public Model pmod;

generics myGens;

Game1 myGame;

public Bullet Setup(generics moo, Game1 game,Vector3 nupos,Vector3 nurot){

myGens = moo;

myGame = game;

pmod = myGame.modLoad("Content\\Models\\bullet");

pos = nupos;

rot = nurot;

velocity = myGens.cosine3D(rot) * 100;

rot.X -= 67.5f;

return (this);

}

public void UpdateMe()

{

pos += velocity;

draw();

}

public void draw()

{

myGens.sussaModel(pmod, pos, rot);

}

}

}

I have this feeling that the answer will be enbaraissingly simple, but it has eluded me thus far.

Cheers,

James (Developer, gamevial)

Hi James,

Your array of bullets looks like it's a null pointer. Before you can start inserting bullet objects into it, you need to allocate some memory to it using new!

myBullets = new Bullet[ 100 ];      // allocates enough space for 100 bullet objects into your bullet array

It's also worth noting that in C#, arrays use zero-based indexing, so the line:
    myBullets[1] = bullet;
would actually insert a bullet object into the second element of your bullet array.

Rather than using a plain old array, you might also like to play around with the List<> generic collection, found in the System.Collections.Generic namespace. The primary benefit of using a List over a plain array is that you don't need to worry about allocating the correct amount of space up-front for how many bullets you need, as Lists can grow themselves dynamically.

I'd change myBullets to be a:

List<Bullet> myBullets = new List<Bullet>();

To add a bullet:
myBullets.Add( bullet );

Hope this helps! :)

Cheers

Thanks

Worked first time!