vec_set (temp, my.x); 
		temp.z -= 10000; 
		c_trace(temp.x, my.x, ignore_me + ignore_passable + use_box); 		
		result = trace (my.x, temp);
		if(result > 0 ) 
			{ 
			vec_set(VecFrom,my.x); 
			vec_set(VecTo,my.x);
			VecTo.z -= 8* time_step * RESULT; // place player on floor 
			my.z -= c_trace(VecFrom.x,VecTo.x,ignore_me+ignore_sprites+ignore_passable+use_box)- 1;
			}