#include <acknex.h>
#include <ackphysx.h>

SOUND* snd_test="test.wav";
var snd_hndl=0;

//this function is from /include/car.c in gamestudio folder
var pXent_getspeed(ENTITY* ent)
{
	VECTOR vSpeed,vDir;
	pXent_getvelocity(ent,vSpeed,NULL);
	vec_for_angle(vDir,ent.pan);
// speed in km/h, assume 40 quants = 1 m	
	var speed = vec_dot(vDir,vSpeed) * (60.*60.)/(40.*1000.); 
	if (abs(speed) < 1) 
		return 0;
	else 
		return speed;
}

void main()
{
	physX_open();
	level_load(NULL);
	
	ENTITY* ent_tmp=ent_create(CUBE_MDL,nullvector,NULL);
	pXent_settype(ent_tmp,PH_RIGID,PH_BOX);
	
	wait(-3);
	
	while(1)
	{
		pXent_getspeed(ent_tmp);
		
		if(!snd_playing(snd_hndl))
		{
			snd_hndl=ent_playloop(ent_tmp,snd_test,100);
		}
		
		wait(1);
	}
}