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Revision as of 22:59, 29 May 2007 (edit) Sandman (Talk | contribs) ← Previous diff		Current revision (00:15, 9 August 2007) (edit) (undo) Sandman (Talk | contribs) m (Cosine moved to Tutorial:Cosine: tutorial namespace)
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		+	[[Category:tutorials]]
		+
	Some sine and cosine program. Check it out. More of example code, but useful anyway.		Some sine and cosine program. Check it out. More of example code, but useful anyway.
		+
		+	Note that this is code for Fenix versions [[0.93]] and up. Should the code work for other versions as well, be so kind to note this here.
	== Example code ==		== Example code ==
	<pre>		<pre>
	Program cosine;		Program cosine;
		+	Const
		+	seconds = 2.3;
		+	ball_width = 20;
		+	ball_height = 20;
		+	screen_width = 320;
		+	screen_height = 200;
		+	screen_depth = 8;
		+	screen_fps = 60;
		+	cos_factor = 2000;
		+	sin_factor = 4000;
		+	timer_spawn = 0;
		+	timer_ball = 1;
	Begin		Begin
-	set_fps(60,0);	+	// make the movement a bit more smooth
		+	set_fps(screen_fps,0);
-	timer[1]= 200;	+	// spawn a ball process every <seconds> seconds with random colors.
		+	timer[timer_spawn]= seconds*100;
	Repeat		Repeat
-	if(timer[1]>=200)	+	if(timer[timer_spawn]>=seconds*100)
-	timer[1] = 0;	+	timer[timer_spawn]-=seconds*100;
-	x = new_map(20,20,8);	+	x = new_map(ball_width,ball_height,screen_depth);
	map_clear(0,x,rgb(rand(0,255),rand(0,255),rand(0,255)));		map_clear(0,x,rgb(rand(0,255),rand(0,255),rand(0,255)));
	ball(x);		ball(x);
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	Until(key(_esc))		Until(key(_esc))
		+	// kill all other remaining processes and exit
	let_me_alone();		let_me_alone();
		+	exit();
	End		End
	Process ball(graph)		Process ball(graph)
		+	Private
		+	int start_time;
	Begin		Begin
-	z = 0;	+	// remember starting time
		+	start_time = timer[timer_ball];
		+
		+	// position the ball according to the passed time (timer[timer_ball])
	Loop		Loop
-	x = 160+cos(z)*150;	+	x = screen_width /2 + cos((timer[timer_ball]-start_time)*cos_factor)
-	y = 100+sin(z*2)*90;	+	* (screen_width /2-ball_width /2);
-	z+=2000;	+	y = screen_height/2 + sin((timer[timer_ball]-start_time)*sin_factor)
		+	* (screen_height/2-ball_height/2);
	frame;		frame;
	End		End
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	End		End
	</pre>		</pre>
-	Used in example: [[set_fps]](), [[new_map]](), [[map_clear]](), [[key]](), [[let_me_alone]](), [[cos]](), [[sin]](), [[timer]], [[x]], [[y]]	+	Used in example: [[set_fps]](), [[new_map]](), [[map_clear]](), [[rand]](), [[key]](), [[let_me_alone]](), [[cos]](), [[sin]](), [[timer]], [[x]], [[y]]
		+
		+	This will result in something like:<br>
		+	http://wwwhome.cs.utwente.nl/~bergfi/fenix/wiki/cosine.PNG
		+
		+	Or with seconds=0.25; cos_factor=6000;sin_factor=2000 something like this:<br>
		+	http://wwwhome.cs.utwente.nl/~bergfi/fenix/wiki/cosine2.PNG
		+
		+	Try fiddling around with the parameters yourself and she what you can conjure.

---

Current revision

Some sine and cosine program. Check it out. More of example code, but useful anyway.

Note that this is code for Fenix versions 0.93 and up. Should the code work for other versions as well, be so kind to note this here.

[edit] Example code

Program cosine;
Const
    seconds       = 2.3;
    ball_width    = 20;
    ball_height   = 20;
    screen_width  = 320;
    screen_height = 200;
    screen_depth  = 8;
    screen_fps    = 60;
    cos_factor    = 2000;
    sin_factor    = 4000;
    timer_spawn   = 0;
    timer_ball    = 1;
Begin

    // make the movement a bit more smooth
    set_fps(screen_fps,0);

    // spawn a ball process every <seconds> seconds with random colors.
    timer[timer_spawn]= seconds*100;
    Repeat
        if(timer[timer_spawn]>=seconds*100)
            timer[timer_spawn]-=seconds*100;
            x = new_map(ball_width,ball_height,screen_depth);
            map_clear(0,x,rgb(rand(0,255),rand(0,255),rand(0,255)));
            ball(x);
        end
        frame;
    Until(key(_esc))

    // kill all other remaining processes and exit
    let_me_alone();
    exit();

End

Process ball(graph)
Private
    int start_time;
Begin

    // remember starting time
    start_time = timer[timer_ball];

    // position the ball according to the passed time (timer[timer_ball])
    Loop
        x = screen_width /2 + cos((timer[timer_ball]-start_time)*cos_factor)
                              * (screen_width /2-ball_width /2);
        y = screen_height/2 + sin((timer[timer_ball]-start_time)*sin_factor)
                              * (screen_height/2-ball_height/2);
        frame;
    End

End

Used in example: set_fps(), new_map(), map_clear(), rand(), key(), let_me_alone(), cos(), sin(), timer, x, y

This will result in something like:

Or with seconds=0.25; cos_factor=6000;sin_factor=2000 something like this:

Try fiddling around with the parameters yourself and she what you can conjure.