How to declare a new Data Type?

If you want to pass a function (pointer) as an argument, you can just do so.

function fp(t,x,f)
{
f[0]=x[1];
f[1]= -Math.sin(x[0])*(g/ll);
}

function r_kutta6(eps,x0,fnx,t,x)
{
...
fnx(t0,x0,f); //means fp(t0,x0,f); - when applying the procedure.
...
}

r_kutta6(0.0001,t0,xx0,fp,t,xx);


"ihtus" <webforumsuser@macromedia.com> wrote in message
news:e7uhlp$qig$1@forums.macromedia.com...
> I have a new Data type ( fxn ) declared in delphi, and i would like to
convert
> the code to actionscript
>

quote:

---

> type fxn=procedure(t:extended;x:array of extended;var f:array of
extended);
> .....
> procedure fp(t:extended;x:array of extended;var f:array of extended);
> begin
> f[0]:=x[1];
> f[1]:=-sin(x[0])*(g/ll);
> end;
> ....
>
> procedure r_kutta6(eps,t0:extended;x0:array of extended;fnx:fxn;
> var t:extended;var x:array of extended);
> begin
> ...
> fnx(t0,x0,f); //means fp(t0,x0,f); - when applying the procedure.
> ...
> end;
>
> ...
> r_kutta6(0.0001,t0,xx0,fp,t,xx);
>
>

---

>
> how can i declare in actionscript such a new data type, and after - to
use as
> i do in delphi
> thanks!
>

ihtus,

> how can i declare in actionscript such a new data type, and
> after - to use as i do in delphi

It goes without saying that any new datatype in ActionScript can only do
what ActionScript is inherently capable of doing. Your sample code looks
fine, in that regard. To declare a datatype in ActionScript 2.0, you'll
have to write your own class.

Check out Joey Lott's three-part ActionScript 2.0 Primer for details.

http://www.person13.com/articles/


David
stiller (at) quip (dot) net
Dev essays: http://www.quip.net/blog/
"Luck is the residue of good design."