[Squeakland] missing from etoys?

[Bill Kerr]

http://billkerr2.blogspot.com/2007/11/how-to-make-space-invaders-in-etoys.h=
tml

I've written it up step by step, with screenshots on my blog

cheers,
- Bill

On Nov 2, 2007 11:20 AM, Bill Kerr <billkerr at gmail.com> wrote:

> thanks Bert, you are correct, I've got it working now
>
> - Bill
>
>
> On Nov 1, 2007 9:57 PM, Bert Freudenberg <bert at freudenbergs.de> wrote:
>
> > Hmm, why don't you let the bullet clean up itself when it reaches the
> > edge of the screen?
> >
> > "managing multiple bullets" seems the wrong approach to me, fire-and-
> > forget would manage itself.
> >
> > - Bert -
> >
> > On Nov 1, 2007, at 4:29 , Bill Kerr wrote:
> >
> > > I've solved some of the problems but still have at least one big one
> > >
> > > SUCCESS:
> > > Can move and shoot at the same time
> > > Can make a single sound when shooting
> > > Can simulate a key press
> > >
> > > PROBLEMS:
> > > When I fire a second bullet the first bullet stops moving (main
> > > current problem)
> > > Can only create new bullets when an original bullet is on the
> > > screen (it would be nice to create from scratch but I suppose I can
> > > live with that)
> > >
> > > Each new bullet is automatically named bullet1, bullet2, etc
> > > My script sets the timer running for a newBullet (Player
> > > variable) . So when a second bullet is created then the first
> > > bullet stops.
> > >
> > > Each new bullet has its own player with it's own timer. So, what's
> > > a good way to manage firing multiple bullets and then tidying up as
> > > they reach the top of the screen or hit a target (without deleting
> > > all the siblings?) I'm finding that hard.
> > >
> > > I've put my project here:
> > > http://www.squeakland.org/project.jsp?http://www.users.on.net/
> > > ~billkerr/etoy/shooter1.010.pr
> > >
> > > prime
> > >     self getNewBullet setHeading: 0.0.
> > >     self getNewBullet setY: self getY + 10.
> > >     self getNewBullet setX: self getX
> > >
> > >
> > > shoot
> > >     World2 getLastKeystroke =3D '<up>' ~~ false
> > >         ifTrue: [self setNewBullet: Bullet1 getNewClone.
> > >             self prime.
> > >             Bullet1 beep: 'clink'.
> > >             Bullet1 startScript: #move.
> > >             World2 setLastKeystroke: '<down>']     "simulate keypress"
> > >
> > > move
> > >     Gun1 getNewBullet forward: 5
> > >
> > >
> > > (I haven't included the code that moves the gun left and right)
> > >
> > > I do have a delete siblings script which I use to tidy up but it's
> > > not integrated:
> > >
> > > deleteSiblings
> > >     self tellAllSiblings: #delete
> > >
> > > Some bits of Karl's tutorial are dated but it was very useful -
> > > thanks. I had to go through and put newBullet in everywhere, it
> > > didn't work by just replacing <gun prime> with <gun's new bullet
> > > prime>, which is what Karl's tutorial seems to do. I had to replace
> > > each line of the <gun prime> procedure code with <gun's new bullet
> > > prime>
> > >
> > > At any rate, many thanks for the help
> > >
> > > --
> > > Bill Kerr
> > > http://billkerr2.blogspot.com/
> > >
> > >
> > >
> > > On Oct 29, 2007 7:06 AM, Karl < karl.ramberg at comhem.se> wrote:
> > > Bill Kerr wrote:
> > > >
> > > > I see making a shooter, eg. a space invaders simulation, as a nice
> > > > first game activity for children, one that many find highly
> > > motivating
> > > >
> > > I made a tutorial a long time ago about this.
> > > http://209.143.91.36/super/503
> > >
> > > I think there are some issues with the layout of images and the text.
> > > Also it does not use keyboard but the joystick morph.
> > >
> > > Karl
> > >
> > >
> > > _______________________________________________
> > > Squeakland mailing list
> > > Squeakland at squeakland.org
> > > http://squeakland.org/mailman/listinfo/squeakland
> >
> >
> >
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