Can any one please give me some code for enemy A.I. that makes the enemy walk straight to the player. I am doing versus game and I need a starting code to program the A.I. I'm really lost at what to do right now.

Here is my enemy action code

============================================================

action player_cb()
{

//ENEMY IS STANDING ON GROUND
VECTOR vFeet;
vec_for_min(vFeet,me);
set(my,FLAG2);
my.ESTATE = 1;
//ENEMY IS IDLE
if(my.ESTATE == 1)
{
my.EANIMATION += 10 * time_step;
ent_animate(my, "idle", my.EANIMATION, ANM_CYCLE);
var dist_between = pos_player - pos_cb;
if(dist_between != 0)
{
my.EANIMATION = 0;
my.ESTATE = 2;
}
else if(dist_vs == 0)
{
my.EANIMATION = 0;
my.ESTATE = 1;
}
}


if(my.ESTATE == 2)
{
var distance = (dist_vs)*5*time_step;
c_move(my, vector(0,distance,0), NULL, NULL);

walk_percentage -= 3*distance;
ent_animate(my,"walk",walk_percentage,ANM_CYCLE);
my.EANIMATION = 0;
my.ESTATE = 3;
}
if(my.ESTATE == 3)
{
my.EANIMATION = 0;
my.ESTATE = 1;
}

============================================================
got so many error there. I cant run it.

This code is nonsense. There is no loop, no wait etc.

Read the tutorial, you must understand how actions work before you can write them.

Thx for the reply. How bout tis one.

========================================================================
action player_cb()
{
var pos_cb = vector(my.x, my.y, my.z);
//ENEMY IS STANDING ON GROUND
VECTOR vFeet;
vec_for_min(vFeet,me);
set(my,FLAG2);
my.ESTATE = 1;
//ENEMY IS IDLE
if(my.ESTATE == 1)
{
while(1)
{
my.EANIMATION += 10 * time_step;
ent_animate(my, "idle", my.EANIMATION, ANM_CYCLE);
if(vec_dist(my.x,player.x)<900)
{
my.EANIMATION = 0;
my.ESTATE = 2;
}
wait(1);
}
}
if(my.ESTATE == 2)
{
while(1)
{
var distance = my.x *5*time_step;
c_move(my, vector(0,distance,0), NULL, NULL);
walk_percentage -= 3*distance;
ent_animate(my,"walk",walk_percentage,ANM_CYCLE);
my.EANIMATION = 0;
my.ESTATE = 3;
wait(1);
}
}
if(my.ESTATE == 3)
{
my.EANIMATION = 0;
my.ESTATE = 1;
}
}
============================================================================

Please tell me where I went wrong or whats lacking.

Really appreciate every reply.

I updated my code

===============================================================================
action player_cb()
{
var pos_cb = vector(my.x, my.y, my.z);
//ENEMY IS STANDING ON GROUND
VECTOR vFeet;
vec_for_min(vFeet,me);
set(my,FLAG2);
my.STATE = 1;
//ENEMY IS IDLE
if(my.STATE == 1)
{
c_scan(my.x,my.pan,vector(900,900,900),SCAN_ENTS | SCAN_FLAG2 | IGNORE_ME);
while(1)
{
my.ANIMATION += 10 * time_step;
ent_animate(my, "idle", my.ANIMATION, ANM_CYCLE);
if(you)
{
my.ANIMATION = 0;
my.STATE = 2;
}
wait(1);
}
}
if(my.STATE == 2)
{
var agwat = vec_dist(my.x, your.x);


while(1)
{
if(agwat > 900)
{
ent_animate(my,"walk",walk_percentage,ANM_CYCLE);
my.ANIMATION = 0;
if(agwat == 0)
{
my.ANIMATION = 0;
my.STATE = 3;
}
}
wait(1);
}

}
if(my.STATE == 3)
{
my.ANIMATION = 0;
my.STATE = 1;

}
}

============================================================================

Enemy detects my presence but it only stays in idle animation. Unless the distance between the two is reduced to 0, the enemy should be on walking state but it still stays in idle state.

Suprised this even compiled...

1)'var pos_cb = vector(my.x, my.y, my.z);' >>> the function 'vector' returns a VECTOR*, not a var.

2)It is in the 'idle' state forever because you are stuck inside an infinite loop. You need to either replace 'while(1)' with a condition like 'while(my.STATE != 2)' or add a 'break;' statement somewhere within the loop, so it can break out of the loop and continue executing the statements below the loop, eg. the distance test and walking animation.

oh i forgot to remove it hehe.

ok I've already remove that pos_cb thingy. I still get the same results.

Have you changed the infinite loop?

Ya, I tried change it. I think the problem seems to be that the program wont enter state2. I updated my code again, still get same result.

================================================================================

action player_cb()
{
ENTITY* enemy = NULL;
//ENEMY IS STANDING ON GROUND=================================================================
VECTOR vFeet;
vec_for_min(vFeet,me);
set(my,FLAG2);
my.STATE = 1;
//ENEMY IS IDLE===============================================================================
if(my.STATE == 1)
{
//DETECT THE ENEMY============================================================================
c_scan(my.x,my.pan,vector(900,0,0),SCAN_ENTS | SCAN_FLAG2 | IGNORE_ME);
while(1)
{
my.ANIMATION += 10 * time_step;
ent_animate(my, "idle", my.ANIMATION, ANM_CYCLE);
if(you)
{
my.ANIMATION = 0;
my.STATE = 2;
enemy = your.PLAYER;
}
wait(1);
}
}
//PERFORM WALK ANIMATION======================================================================
if(my.STATE == 2)
{
VECTOR vDirection;
ANGLE vTargetAngle;
vec_diff(vDirection,enemy.x,my.x);
vec_to_angle(vTargetAngle,vDirection);
my.pan += time_step * sign(ang(vTargetAngle.pan - my.pan));
var dist = vec_dist(my.x, your.x);

while(1)
{
if(dist > 0 || dist < 0)
{
var distance = 5*time_step;
c_move(me, vector(distance,0,0), NULL, GLIDE);
walk_percentage += 2* distance;
ent_animate(my,"walk",walk_percentage,ANM_CYCLE);

if(dist == 0)
{
my.ANIMATION = 0;
my.STATE = 3;
}
}
wait(1);
}

===============================================================================

I tried putting in some program that may cause errors in state2, still the program was able to run. I think the problem is in

==========================================================

if(you)
{
my.ANIMATION = 0;
my.STATE = 2;
enemy = your.PLAYER;
}
==========================================================

because the it doesnt seem to detect (you) thats why it doesnt enter the if statement and only perform the idle state. I wonder whats the problem? . . .

ALRIGHT!!! Problem solved!!!!

problem is here
===========================================================
c_scan(my.x,my.pan,vector(900,0,0),SCAN_ENTS | SCAN_FLAG2 | IGNORE_ME);
===========================================================
It should have been
===========================================================
c_scan(my.x,my.pan,vector(900,0,900),SCAN_ENTS | SCAN_FLAG2 | IGNORE_ME);
===========================================================

my level was facing backwards. I didnt notice that xz wa back not front T,T.

Many thx for your replies sir.