This wiki is out of date, use the continuation of this wiki instead

From FenixWiki

Revision as of 13:00, 23 March 2007 (edit) 130.89.160.132 (Talk) ← Previous diff		Revision as of 13:04, 23 March 2007 (edit) (undo) 130.89.160.132 (Talk) Next diff →
Line 18:		Line 18:
	Loop		Loop
	speed+=key(_up)*(speed<maxspeed)-key(_down)*(speed>-maxspeed);		speed+=key(_up)*(speed<maxspeed)-key(_down)*(speed>-maxspeed);
-	angle+=(key(_up)-key(_down))*maxturnspeed;	+	angle+=(key(_left)-key(_right))*maxturnspeed;
	advance(speed);		advance(speed);
	frame;		frame;
Line 24:		Line 24:
	End		End
	</pre>		</pre>
-	Now one can call this process for example by doing:	+	Now one can call this process for example by doing the following.
	<pre>		<pre>
	Private		Private
	int map;		int map;
	Begin		Begin
-	map = new_map(20,20,16);	+	map = new_map(20,20,8);
	map_clear(0,map,rgb(0,255,255));		map_clear(0,map,rgb(0,255,255));
	SpaceShip(0,map,100,100,0,20,5000);		SpaceShip(0,map,100,100,0,20,5000);
	End		End
	</pre>		</pre>
		+	This will make a SpaceShip with a cyan coloured block, able to move around the screen.

---

Revision as of 13:04, 23 March 2007

A process is a subroutine to which one or more of the following apply:
- it received parameters
- it acts on the parameters
- it processes data located elsewhere
- it returns a value

In addition to these possibilities, a process always has a frame; statement. The difference between a function and a process is a process is treated as a seperate thread. This means one can't let a process return a value, as the father process continues its code as well. When a process comes to its first frame; statement, the process 'returns' its ProcessID and continues the code (in the next frame).

In earlier Fenix versions (2005 and earlier) there is no difference in syntax, however, a process is treated like a function when there is no frame; statement in the code.

Example

Process SpaceShip( int file , int graph , int x , int y , int angle , int maxspeed , int maxturnspeed )
Private
    int speed;
Begin
    Loop
        speed+=key(_up)*(speed<maxspeed)-key(_down)*(speed>-maxspeed);
        angle+=(key(_left)-key(_right))*maxturnspeed;
        advance(speed);
        frame;
    End
End

Now one can call this process for example by doing the following.

Private
    int map;
Begin
    map = new_map(20,20,8);
    map_clear(0,map,rgb(0,255,255));
    SpaceShip(0,map,100,100,0,20,5000);
End

This will make a SpaceShip with a cyan coloured block, able to move around the screen.