1. Function Passing
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Hey Rob or anyone who can help,
I was working on a port of OpenGL, and I've run into a snag. OpenGL
requires you to define a function for handling the displaying of data =
then
telling OpenGL what the name of the function is like so.
// C++ Pseudo-Code for OpenGL
void DispFunc(void)
{
// Do whatever displaying you need here.
}
void main(void)
{
glDisplayFunc(DispFunc) // Passing the function DispFunc
// as a parameter.
}
How could I mimic this in Euphoria so when I call the func =
glDisplayFunc, I
can pass it my routine.
P.S. I tried to send this directly to Rob at rds at attcanada.net and it =
said I wasn't allowed to send him mail. I didn't know you hated me so =
much Rob :-}
Thanx ahead of time,
Adam Weeden
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<DIV><FONT size=3D2>Hey Rob or anyone who can =
help,<BR> I was=20
working on a port of OpenGL, and I've run into a snag. =
OpenGL<BR>requires=20
you to define a function for handling the displaying of data =
then<BR>telling=20
OpenGL what the name of the function is like so.</FONT></DIV>
<DIV><FONT size=3D2><BR>// C++ Pseudo-Code for OpenGL<BR><BR>void=20
DispFunc(void)<BR>{<BR> // Do whatever displaying you =
need=20
here.<BR>}<BR><BR>void main(void)<BR>{<BR> =20
glDisplayFunc(DispFunc) // Passing the function=20
as a parameter.<BR>}<BR><BR>How could I mimic this in Euphoria so when I =
call=20
the func glDisplayFunc, I<BR>can pass it my routine.<BR></FONT></DIV>
<DIV><FONT size=3D2>P.S. I tried to send this directly to Rob at <A=20
href=3D"mailto:rds at attcanada.net">rds at attcanada.net</A> and it said =
I wasn't=20
allowed to send him mail. I didn't know you hated me so much Rob=20
:-}</FONT></DIV>
<DIV><FONT size=3D2><BR>Thanx ahead of time,<BR>Adam=20
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2. Re: Function Passing
Adam Weeden writes:
> // C++ Pseudo-Code for OpenGL
>
> void DispFunc(void)
> {
> // Do whatever displaying you need here.
> }
>
> void main(void)
> {
> glDisplayFunc(DispFunc) // Passing the function DispFunc
> // as a parameter.
> }
> How could I mimic this in Euphoria...
*** warning - untested code ahead:
1. Define function DispFunc() in Euphoria code
as a function of 0 parameters.
It has to be function - just return 0 or something.
The returned value will be ignored.
2. Get the address of this Euphoria function with:
atom addr
addr = call_back(routine_id("DispFunc"))
3. link to glDisplayFunc using
lib = open_dll("....")
gld = define_c_proc(lib, "glDisplayFunc", {C_POINTER}).
4. Call glDisplayFunc() using:
c_proc(gld, {})
> P.S. I tried to send this directly to Rob at rds at attcanada.net
> and it said I wasn't allowed to send him mail. I didn't
> know you hated me so much Rob :-}
My ISP's mail server was down today for a few hours.
Regards,
Rob Craig
Rapid Deployment Software
http://members.aol.com/FilesEu/
3. Re: Function Passing
- Posted by Robert Craig <rds at ATTCANADA.NET>
Aug 01, 1999
-
Last edited Aug 02, 1999
> 4. Call glDisplayFunc() using:
> c_proc(gld, {})
should be:
c_proc(gld, {addr})
Regards,
Rob Craig
Rapid Deployment Software
http://members.aol.com/FilesEu/
