var constr_front_left;
var constr_front_right;

var constr_back_left;
var constr_back_right;

VECTOR mom_speed;
var max_angle;
var stear_contr;

var max_speed = 1500;
var ang_force;
var speed_contr;

function mass()
{
pXent_setmass(my,60);
pXent_setfriction (my, 100);
pXent_setdamping (my, 20, 20);
pXent_setelasticity (my,20);
}

action warthdog()
{
pXent_settype(my,PH_RIGID,PH_CONVEX);
pXent_setmass (my, 15);

pXent_setfriction (my, 20);
pXent_setdamping (my, 5, 5);
pXent_setelasticity (my, 10);

ENTITY* constr_front_left = ent_create("tire.mdl",vector(my.x+75,my.y-45,my.z-10),mass);
ENTITY* constr_front_right = ent_create("tire.mdl",vector(my.x+75,my.y+45,my.z-10),mass);
ENTITY* constr_back_left = ent_create("tire.mdl",vector(my.x-70,my.y-45,my.z-10),mass);
ENTITY* constr_back_right = ent_create("tire.mdl",vector(my.x-70,my.y+45,my.z-10),mass);
pXcon_add ( PH_WHEEL, constr_front_left, my, 0 );
pXcon_add ( PH_WHEEL, constr_front_right, my, 0 );
pXcon_add ( PH_WHEEL, constr_back_left, my, 0 );
pXcon_add ( PH_WHEEL, constr_back_right, my, 0 );
while(1)
{
stear_contr = (key_d - key_a);
max_angle += stear_contr * 3 * time_step;
max_angle = clamp (max_angle, -30, 30);
if (stear_contr != 0)
{
pXcon_setparams2 (constr_front_left, vector (max_angle, max_angle, 0), nullvector, vector (95000, 500, 0));
pXcon_setparams2 (constr_front_right, vector (max_angle, max_angle, 0), nullvector, vector (95000, 500, 0));
}
else
{
max_angle = max_angle * (1 - (0.25 * time_step));
if (abs(max_angle) < 1)
max_angle = 0;
pXcon_setparams2 (constr_front_left, vector (max_angle, max_angle, 0), nullvector, vector (95000, 500, 0));
pXcon_setparams2 (constr_front_right, vector (max_angle, max_angle, 0), nullvector, vector (95000, 500, 0));
}
speed_contr = (key_w - key_s);
ang_force = speed_contr * 1000 * time_step;

pXcon_setmotor(constr_back_left, vector(-ang_force, max_speed, 0), nullvector);
pXcon_setmotor(constr_back_right, vector(-ang_force, max_speed, 0), nullvector);
wait(1);
}
}
}