override public void OnStateEnter(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
{
ai = animator.GetComponent <Trex>();
perception = animator.GetComponent <Perception>();
shootTimer = ai.attackCooldown;
aiProjectile = ai.projectile;
rigidbody = ai.GetComponent <Rigidbody2D>();
spriteRenderer = ai.GetComponent <SpriteRenderer>();
aimOrigin = ai.aimOrigin;
}