unity push in opposite direction of collision
void OnCollisionEnter(Collision c)
{
// force is how forcefully we will push the player away from the enemy.
float force = 3;
// If the object we hit is the enemy
if (c.gameObject.tag == "enemy")
{
// Calculate Angle Between the collision point and the player
Vector3 dir = c.contacts[0].point - transform.position;
// We then get the opposite (-Vector3) and normalize it
dir = -dir.normalized;
// And finally we add force in the direction of dir and multiply it by force.
// This will push back the player
GetComponent<Rigidbody>().AddForce(dir*force);
}
}