koobas.hobune.stream
AI Evasion help
Hi there, I'm having a little trouble with my avoidance script, I have a raysphere cast set up to detect if an enemy fighter is too close and then a random position is generated for it to fly towards and then after waiting 4 seconds it checks to see if the enemy is still too close otherwise it turns back and attacks, however they seem to be constantly flying around each other.
Debug.Log shows that they are doing the job right, but i've increased the random distance from 40 up to 500 and nothing changed. I have a feeling that i've missed something obvious or forgotten to add something important, but here's the code if anyone has a clue
if (Physics.SphereCast (EvadePosition.position, 20, EvadePosition.forward, Hit, 20))
{
if(Hit.transform.tag == "Enemy")
{
IsAttacking = false;
IsEvading = true;
transform.Translate (0, 0, EvadeSpeed * Time.deltaTime);
Evade();
}
}
function Evade ()
{
var EvadePoint = Random.insideUnitSphere * 500;
var rotation = transform.rotation;
var position = transform.InverseTransformPoint(EvadePoint);
var direction : float = position.x > 0 ? 1.0 : - 1.0;
var angle = Vector3.Angle (Vector3.forward, position) * direction;;
var targetDirection = (EvadePoint - transform.position).normalized;
var lookRotation = Quaternion.LookRotation (targetDirection);
transform.rotation = Quaternion.Slerp(rotation, lookRotation, TurnSpeed * Time.deltaTime);
transform.Rotate (0,0,-angle * Roll);
yield WaitForSeconds (4);
IsAttacking = true;
//Debug.Log("Resuming Attack - Blue Fighter");
IsEvading = false;
transform.Translate (0, 0, AttackSpeed * Time.deltaTime);
Attack();
}
I think the problem is you are not checking if it is evading already before calling Evade() again.
if(Hit.transform.tag == "Enemy" && IsAttacking)
This should stop everything under that line from recalculating if you are already evading
if (Physics.SphereCast (EvadePosition.position, 20, EvadePosition.forward, Hit, 20))
{
if(Hit.transform.tag == "Enemy" && IsAttacking)
{
IsAttacking = false;
IsEvading = true;
transform.Translate (0, 0, EvadeSpeed * Time.deltaTime);
Evade();
}
}
function Evade ()
{
var EvadePoint = Random.insideUnitSphere * 500;
var rotation = transform.rotation;
var position = transform.InverseTransformPoint(EvadePoint);
var direction : float = position.x > 0 ? 1.0 : - 1.0;
var angle = Vector3.Angle (Vector3.forward, position) * direction;;
var targetDirection = (EvadePoint - transform.position).normalized;
var lookRotation = Quaternion.LookRotation (targetDirection);
transform.rotation = Quaternion.Slerp(rotation, lookRotation, TurnSpeed * Time.deltaTime);
transform.Rotate (0,0,-angle * Roll);
yield WaitForSeconds (4);
IsAttacking = true;
//Debug.Log("Resuming Attack - Blue Fighter");
IsEvading = false;
transform.Translate (0, 0, AttackSpeed * Time.deltaTime);
Attack();
}
Thanks, i'll try it when i get home, though what is the "IsAttacking" doing in the if statement brackets? Is it just checking to see if the variable statement is true or false and acting accordingly?
That's the theory.
enemy is attacking
Spherecast to check if should be evading
check the tag and if is attacking
then go to evading behaviour
next update
enemy is evading
Spherecast to check if should be evading
check the tag and if is attacking
is already evading, so no need to apply evading behaviour
once the yield has completed, goes back to attacking
Ah, slight problem, the "IsAttacking" is a function of the ai when it is attacking something, not if it is being attacked, although the evade function is also called if it is being damaged by enemy fire, the spherecast is just there to check if it is too close to the enemy (suppose it could also be use for obstacle avoidance).
Should the if statement in that case checking to see if "IsEvading" is set to false if it is too close to the enemy?
Oops, yeah use not isEvading. It's hard to tell what happens before the spherecast.
if(Hit.transform.tag == "Enemy" && !IsEvading)
I probably should have explained it a little better but i'll let you know how it turns out once i get back in a couple of hours. Thanks again
