void OnTriggerEnter2D(Collider2D coll)
{
// if object collided with is in our defined layer mask
if (collideLayerMask == (collideLayerMask | (1 << coll.gameObject.layer)))
{
// if this object has not already been affected by this explosion instance
if (!hitObjects.Contains(coll.gameObject))
{
// if the component is not found, it will return null and we can ignore it
Rigidbody2D collRB = coll.gameObject.GetComponent <Rigidbody2D>();
if (collRB != null)
{
// call method in a custom script called ExplosionManager to change the material temporarily for this rigidbody to allow for more bounce
explosionManager.StartBouncyCoForRigidbody(collRB);
// get the vector pointing from the center of the explosion to the center of the collided transform
Vector2 explosiveForceDirection = coll.transform.position - transform.position;
// give the vector a magnitude of 1 so it can be used as a direction
explosiveForceDirection = explosiveForceDirection.normalized;
// get magnitude of force using an inverse square function of the distance so that closer objects get hit harder
float distanceFromExplosion = Vector2.Distance(coll.transform.position, transform.position);
// adjust the curve based on the radius of the explosion
float distanceFactor = (1.0f / explosionRadius) * distanceFactorMultiplier;
float forceStrength = maxForceStrength * (1.0f / Mathf.Pow(distanceFactor * distanceFromExplosion, 2));
// make sure to clamp it because as distance approaches zero, the force approaches infinity, which is bad
forceStrength = Mathf.Clamp(forceStrength, 0.0f, maxForceStrength);
// add a force with "Impulse" mode on as this is a force applied all at once
collRB.AddForceAtPosition(explosiveForceDirection * forceStrength, transform.position, ForceMode2D.Impulse);
hitObjects.Add(coll.gameObject);
}
}
}
}