I disagree. Review my code:

Code:
///////////////////////////////
#include <acknex.h>
#include <default.c>

///////////////////////////////

var on_sag;
var on_sol;
var arka_sag;
var arka_sol;

var donus_hizi;
var ana_hiz;
var hiz_kontr;

ENTITY* govde;

action aGovde()
{
	govde = me;
	player = me;
	set(my, SHADOW | CAST);
	
	phent_settype (govde, PH_RIGID, PH_BOX);
	phent_setmass (govde, 15, PH_BOX);
	phent_setgroup (govde, 2);
	phent_setfriction (govde, 20);  
	phent_setdamping (govde, 5, 5);
	phent_setelasticity (govde, 10, 100);
	
}

function tekerlek_fizik_init()
{
	set(my, SHADOW);
	
	phent_settype(me, PH_RIGID, PH_SPHERE);
	phent_setmass(me, 30, PH_SPHERE);
	phent_setgroup(me, 2);
	
	phent_setfriction(me, 100);
	phent_setdamping(me, 20, 20);
	phent_setelasticity(me, 0, 100);
}

action on_sagg()
{
	tekerlek_fizik_init();
	
	on_sag = phcon_add(PH_WHEEL, govde, me);
	
	phcon_setparams1(on_sag, my.x, vector(0,0,1), nullvector);
	phcon_setparams2(on_sag, nullvector, nullvector, nullvector);
}

action on_soll()
{
	tekerlek_fizik_init();
	
	on_sol = phcon_add(PH_WHEEL, govde, me);
	
	phcon_setparams1(on_sol, my.x, vector(0,0,1), nullvector);
	phcon_setparams2(on_sol, nullvector, nullvector, nullvector);
}

action arka_sagg()
{		
	tekerlek_fizik_init();
	
	arka_sag = phcon_add (PH_WHEEL, govde, my);
	phcon_setparams1 (arka_sag, my.x, nullvector, vector (0,1,0));
	phcon_setparams2 (arka_sag, nullvector, nullvector, nullvector);
}

action arka_soll()
{		
	tekerlek_fizik_init();

	arka_sol = phcon_add (PH_WHEEL, govde, my);
	phcon_setparams1 (arka_sol, my.x, nullvector, vector (0,1,0));
	phcon_setparams2 (arka_sol, nullvector, nullvector, nullvector);
}

function main()
{
  vec_set(screen_size,vector(800,600,0));
  vec_set(sky_color,vector(256,256,256)); // dark blue
  video_window(NULL,NULL,0,"Ferrari Racing: Drag");
  d3d_antialias = 1;
  shadow_stencil = 3;
  
  level_load("cevre.wmb");
  
  ph_setgravity(vector(0,0, -386));
  
  
  while(1)
  {
  	/* //kamera
  	camera.x = govde.x - 25 * cos(govde.pan);
  	camera.y = govde.y - 25 * sin(govde.pan);
  	camera.z = govde.z + 25;
  	camera.pan = govde.pan; */
  	
  	
  	hiz_kontr = (key_w - key_s);
  	
  	donus_hizi = hiz_kontr * 100 * time_step;
  	
  	phcon_setmotor(arka_sol, nullvector, vector(-donus_hizi, 1500, 0), nullvector);
  	phcon_setmotor(arka_sag, nullvector, vector(-donus_hizi, 1500, 0), nullvector);
  	
  	wait(1);
  }
}