Please post me a code:)

i want to know distance to walls or models too.(i have tried to use c_trace and c_scan ,but nothing happens)

have you tried this:
variable=c_trace(bl4)
(bl4 is the normal trace stuff )

Try using c_trace in the manual you can see:

Quote:

---

Modifies:
target position where the ray hits the surface of the obstacle (maybe to place a blood stain there)

---

So, distance = vec_dist(my.x,target);
Its just a possible implementation.

i ve tried this
...
temp.x+=500;
dist=c_trace(my.x,temp.x,Ignore_ME|USE_BOX);

and engine give me only distance to models in level ,wall absolutely indetectable:)

i want script : if object is in dist (50m) call function.

Try this:

Code:

---

vec_set(temp, my.x);
temp.x += 1000; //distance ahead
c_trace(my.x,temp,IGNORE_ME+IGNORE_PASSABLE+IGNORE_MODELS+IGNORE_SPRITES+use_box); 	
if(trace_hit != 0 && you == null) //hitted something that isnt an entity
{			
   if(vec_dist(my.x, target) < 500)
   {
      beep;
   }
}

---

var wall_finder[3];
var wall_result;

vec_rotate(wall_finder.x,my.pan); //rotate trace to players rotation
vec_add(wall_finder.x,vector(my.x,my.y,my.z)); // keep trace to player as he moves
wall_result = c_trace(my.x,wall_finder.x,ignore_me | ignore_passable); //find distance to wall

This code works for me to find distance of player from a wall. Also remember the trace needs to be rotated to the players facing direction.