private void FixedUpdate()
{
if (!paused && currentAmmo > 0)
{
delayTimer -= Time.fixedDeltaTime;
if (delayTimer <= 0)
{
delayTimer = delay + Random.value;
currentAmmo--;
//find a target
Vector3 bestAttempt = track.GetRandomPoint();
for (int i = 0; i < attempts; i++)
{
Vector3 testPoint = track.GetRandomPoint();
if (Vector3.Distance(transform.position, testPoint) < Vector3.Distance(transform.position, bestAttempt))
{
bestAttempt = testPoint;
}
}
//spawn a cat
GameObject cat = GameObject.Instantiate(catPrefab);
CatBlock cBlock = cat.GetComponent <CatBlock>();
cBlock.target = bestAttempt;
cBlock.transform.position = transform.position;
}
}
}
private void OnCollisionStay(Collision collision)
{
CatBlock cat = collision.gameObject.GetComponent <CatBlock>();
if (cat != null)
{
cat.killTimer -= Time.fixedDeltaTime;
if (cat.killTimer < 0)
{
Destroy(cat.gameObject);
}
}
}
private void OnTriggerStay(Collider other)
{
CatBlock cat = other.gameObject.GetComponent <CatBlock>();
if (cat != null && cat.readyToTarget())
{
if (nearestTarget == null)
{
nearestTarget = cat;
}
else
{
if (Vector3.Distance(transform.position, nearestTarget.transform.position) > Vector3.Distance(transform.position, cat.transform.position))
{
nearestTarget = cat;
}
}
}
}
private void FixedUpdate()
{
cooldownTimer -= Time.fixedDeltaTime;
cooldownTimer = Mathf.Max(0, cooldownTimer);
if (cooldownTimer == 0 && nearestTarget != null)
{
//calculate our aim direction
Vector3 targetPos = nearestTarget.transform.position;
Vector3 targetVel = nearestTarget.GetComponent <Rigidbody>().velocity;
Vector3 toTarget = targetPos - transform.position;
float a = Vector3.Dot(targetVel, targetVel) - projectileVelocity * projectileVelocity;
float b = 2 * Vector3.Dot(targetVel, toTarget);
float c = Vector3.Dot(toTarget, toTarget);
float p = -b / (2 * a);
float q = Mathf.Sqrt((b * b) - 4 * a * c) / (2 * a);
float t1 = p - q;
float t2 = p + q;
float t;
if (t1 > t2 && t2 > 0)
{
t = t2;
}
else
{
t = t1;
}
Vector3 targetSpot = targetPos + targetVel * t;
Vector3 aimDir = targetSpot - transform.position;
aimDir.Normalize();
//fire the projectile!
GameObject fireProjectile = GameObject.Instantiate(projectile);
fireProjectile.GetComponent <Rigidbody>().velocity = aimDir * projectileVelocity;
fireProjectile.transform.position = transform.position;
//cleanup
cooldownTimer = fireRate;
nearestTarget = null;
}
}
