stock diffvec(vec1[3],vec2[3],vec0[3]) { //Puts the diffenrece-vector of vec1 and vec2 in vec0.
    new i;
    for(i=0;i<3;i++) {
        vec0[i] = vec1[i] - vec2[i];
    }
}

stock veclen(vec[3],factor=1) { //Returns the length of a vector, multiplied with factor.
    new i,j,k,l;
    for(i=0;i<3;i++){
        l = factor * abs(vec[i]);
        k = max(l,k);
        j += l * l;
    }
    i = j;
    while(j > k) {
        j = (j + k) / 2;
        k = i / j;
    }
    return j;
}

stock distance(Index1,Index2) { //Returns the approximate distance between two players
    new User[2][MAX_NAME_LENGTH];
    new Vec[3][3];
    playerinfo(Index1,User[0],MAX_NAME_LENGTH);
    playerinfo(Index2,User[1],MAX_NAME_LENGTH);
    get_userorigin(User[0],Vec[0][0],Vec[0][1],Vec[0][2]);
    get_userorigin(User[1],Vec[1][0],Vec[1][1],Vec[1][2]);
    diffvec(vec[0],vec[1],vec[2]);
    return veclen(vec[2]);
}