void Update()
{
// if stop == true, halt behaviour.
if (stop)
{
return;
}
// If there isn't a current target then stop firing.
if (targetIndex < 0 || targetIndex > targets.Length || targets[targetIndex] == null)
{
// If there are no targets, try find one (or more) again.
if (targets.Length == 0)
{
targets = GameObject.FindGameObjectsWithTag(TargetTag);
}
// Hide muzzle flash.
_CurrentWeapon.GetMuzzleFlashGO().SetActive(false);
// Randomly pick a new target from the possible targets. (done 50 times in the case the target is null)
for (int i = 0; i < 50; i++)
{
if (targets.Length == 0)
{
break;
}
targetIndex = Random.Range(0, targets.Length);
// If a target is found, check to see if the AI (self) can see the target.
if (targets[targetIndex] != null)
{
RaycastHit hit;
if (Physics.Raycast(this.transform.position, targets[targetIndex].transform.position - this.transform.position, out hit, _SightRange))
{
if (hit.transform.tag == TargetTag)
{
break;
}
}
}
}
// If no target is found, stop behaviour.
if (targets.Length > 0 && targets[targetIndex] == null)
{
stop = true;
}
// The target is not spotted by default.
SpottedPlayer = false;
return;
}
// "Look" (aim gun) towards the player.
this.transform.LookAt(targets[targetIndex].transform.position, transform.up);
// If waitFor is true (in the case of reaction time), hault behaviour.
if (waitFor)
{
return;
}
// Create 3 different rays (so that the AI has can spot targets in obscure postions such as crouched)
RaycastHit hitBottom; // Lowest ray hit (stores hit data)
RaycastHit hitMid; // Medium ray hit (stores hit data)
RaycastHit hitTop; // Top ray hit (stores hit data)
#region Debugging
// hitTop
Debug.DrawRay(this.transform.position, (this.transform.forward + (this.transform.up * 0.075f)) * _SightRange, Color.green);
// hitMid
Debug.DrawRay(this.transform.position, (this.transform.forward + (this.transform.up * 0.05f)) * _SightRange, Color.green);
// hitBottom
Debug.DrawRay(this.transform.position, this.transform.forward * _SightRange, Color.green);
#endregion
// Has the ray hit an object?
bool hitMidBool = Physics.Raycast(this.transform.position, (this.transform.forward + (this.transform.up * 0.05f)), out hitMid, _SightRange);
bool hitTopBool = Physics.Raycast(this.transform.position, (this.transform.forward + (this.transform.up * 0.075f)), out hitTop, _SightRange);
bool hitBottomBool = Physics.Raycast(this.transform.position, this.transform.forward, out hitBottom, _SightRange);
// If none of the rays have hit an object, return and hide the muzzle flash (stopped firing).
if (!hitBottomBool && !hitMidBool && !hitTopBool)
{
_CurrentWeapon.GetMuzzleFlashGO().SetActive(false);
return;
}
// Else if ANY of the three rays have hit the player/a target.
else if (hitTop.transform != null && (hitTop.transform.tag == TargetTag || (hitTop.transform.GetComponent <Destructable> () && SpottedPlayer)) ||
hitBottom.transform != null && (hitBottom.transform.tag == TargetTag || (hitBottom.transform.GetComponent <Destructable> () && SpottedPlayer)) ||
hitMid.transform != null && (hitMid.transform.tag == TargetTag || (hitMid.transform.GetComponent <Destructable> () && SpottedPlayer)))
{
// If the player hasn't already been spotted.
if (SpottedPlayer == false)
{
// React (wait for a moment of time).
StartCoroutine("Reaction");
SpottedPlayer = true;
return;
}
}
// Else if another object (not a player/target) return and hide the muzzle flash (stopped firing).
else
{
//TODO NEXT BUILD // ATEMPT TO SEE TARGET BY CROUCHING OR LEANING
_CurrentWeapon.GetMuzzleFlashGO().SetActive(false);
return;
}
// If the Muzzle Flash is not playing then activate it.
if (!_CurrentWeapon.GetMuzzleFlashPS().isPlaying)
{
_CurrentWeapon.GetMuzzleFlashPS().Play();
_CurrentWeapon.GetMuzzleFlashPS().enableEmission = true;
_CurrentWeapon.GetMuzzleFlashGO().SetActive(true);
}
// If the weapon's clip is empty.
if (_CurrentWeapon.GetClip() <= 0)
{
// If there is Ammo left then reload.
if (_CurrentWeapon.AIGetAmmo() > 0)
{
// Play Reload sound.
if (_AudioSource)
{
_AudioSource.clip = ReloadSound;
if (_AudioSource.isPlaying == false)
{
if (_AudioSource.enabled == true)
{
_AudioSource.Play();
}
}
}
//Reload weapon.
_CurrentWeapon.Reload();
}
// Activate/show Muzzle flash.
_CurrentWeapon.GetMuzzleFlashGO().SetActive(false);
return;
}
// If no animation is playing (weapon is idle/not being used)
if (this.GetComponent <Animation> ().isPlaying == false)
{
// Recoil effect implemented using random vector to be used as an offset.
Vector3 randomVector = new Vector3(Random.Range(-_RandomVectorRange, _RandomVectorRange), Random.Range(-_RandomVectorRange, _RandomVectorRange), Random.Range(-_RandomVectorRange, _RandomVectorRange));
Debug.DrawRay(this.transform.position + this.transform.up * 0.5f, (this.transform.forward + randomVector) * _SightRange, Color.blue);
// If the ray (bullet) has hit an object.
RaycastHit hit;
if (Physics.Raycast(this.transform.position, this.transform.forward + randomVector, out hit, _SightRange))
{
// Play recoil animation
this.GetComponent <Animation> ().Play("recoil");
// Play shoot/fire sound.
if (_AudioSource)
{
_AudioSource.clip = AssaultRifleFireSound;
if (_AudioSource.enabled == true)
{
_AudioSource.Play();
}
}
// Activate/Show muzzle flash.
_CurrentWeapon.GetMuzzleFlashGO().SetActive(true);
// Reduce clip size by 1 bullet.
_CurrentWeapon.ManipulateClip(-1);
// Apply force to the hit object (if it has a Rigidbody component).
if (hit.transform.GetComponent <Rigidbody> ())
{
hit.transform.GetComponent <Rigidbody> ().AddForce(this.transform.forward * 10000f * Time.deltaTime);
}
// Reduce object's health by 1 (if it has a Destructable component).
if (hit.transform.GetComponent <Destructable> ())
{
hit.transform.GetComponent <Destructable> ().ManipulateHealth(_CurrentWeapon.GetDamage());
}
}
}
}