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static class?

Started by siddim Jun 13, 2002 at 10:22 AM 10 replies 500+ views

Original Post

Jun 13, 2002 at 10:22 AM

hi, I am building a little system, and i want to have a fonction available everywhere in the code. This fonction will be in a class for sure and will need to be initialize(constructor). How can i make this work? this fonction will be to write down text in a full screen window, but i want it to be available everywhere(it''s for debuging), you can compare it to cout<<"text"; but in my case it''s a opengl fonction that wrote down text using a font texture. my function is ready and working but i don''t want to pass a pointer in each other class. How can i make that work? thanks Siddim.

Carrot

Jun 13, 2002 at 10:37 AM

Search for Meyer Singleton Pattern (or any other singleton pattern).
This site has an article you could check out too

http://www.gamedev.net/columns/gameengineering/singleton/page2.asp

siddim

Jun 13, 2002 at 1:27 PM

ok thanks it solve my problem,

but now, is there some way to make the calling humm shorter? an alias or something?

ex:
CWriter::Instance()->setSpacing(0);
CWriter::Instance()->setFont(0);
CWriter::Instance()->Print(40,150,"Star Wars");

is a bit long, how did they make "cout"? can i make my own function like that adprint(x,y,"text"); without the :: -> thing?

thanks in advance.

[edited by - Siddim on June 13, 2002 2:28:55 PM]

jenova

Jun 13, 2002 at 1:44 PM

namespace

To the vast majority of mankind, nothing is more agreeable than to escape the need for mental exertion... To most people, nothing is more troublesome than the effort of thinking.

uNiQue0815

Jun 13, 2002 at 2:19 PM

that''s my keyword !!!!!!

namespace !!

what exactly is this (think i know, but not too sure), and how does it work ?? every attempt i started didn''t work at all... i''ve already read the msdn-stuff about it, but nothing helped.
could you plz explain & maybe post some sample-code ?

thx !

siddim

Jun 13, 2002 at 2:23 PM

yea really good idea, i never quite get the using namespace std thing.

jenova

Jun 13, 2002 at 4:29 PM

namespaces

To the vast majority of mankind, nothing is more agreeable than to escape the need for mental exertion... To most people, nothing is more troublesome than the effort of thinking.

Evil Bill

Jun 13, 2002 at 4:53 PM

quote:
you can compare it to cout<<"text";

cout is a variable, not a function.
use an extern, like this:

  
// In TextOutput.h:

extern CDebugOut output;

// In TextOutput.cpp:

CDebugOut output;

// In Test.cpp:

#include "TextOutput.h"

void Moo()
{
   output << "Baa";
   output.SomeFunction();
}

Steve
DirectX Programmer
Soon to be the new Bill Gates

uNiQue0815

Jun 14, 2002 at 1:07 PM

mmh... now that i know, what namespaces are, i''m a little bit disappointed

hoped, that something else was meant.

i wanted to :

class a
{
int x, y, z;
};

a obj;

main()
{
// "open ''namespace''"
x = 0; y = 0; z = 0;
// "close ''namespace''"
}

is THAT possible somehow ? (know, it''s off-topic, but since the debate touched this one a little bit...)

in pascal it worked using :

with (a) do
begin
x := 1; y := 1; z := 1;
end;

would really make things easy in c++ sometimes...

wild_pointer

Jun 14, 2002 at 2:25 PM

quote:
Original post by uNiQue0815
mmh... now that i know, what namespaces are, i'm a little bit disappointed
hoped, that something else was meant.

i wanted to :

class a
{
int x, y, z;
};

a obj;

main()
{
// "open 'namespace'"
x = 0; y = 0; z = 0;
// "close 'namespace'"
}

is THAT possible somehow ? (know, it's off-topic, but since the debate touched this one a little bit...)

in pascal it worked using :

with (a) do
begin
x := 1; y := 1; z := 1;
end;

would really make things easy in c++ sometimes...

just make a method to set them. ie a::set( int _x, int _y, int _z )

beginner_directx

Jun 14, 2002 at 7:22 PM

make ur function static

http://uae-arts.host.sk

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