// Update is called once per frame
void Update()
{
if (enemyController.freezeEnemy)
{
// add anything here to happen while frozen i.e. time compensations
return;
}
// Mambu has two states - Closed and Open - and alternates between them while in play
// Closed - invincible (set in animation) and moves across the screen for closedTimer time
// when closedTimer expires then switches to his Open state and sets two timers
// openTimer (how long his shell remains open) and
// shootTimer (how long to wait before shooting his 8 bullets)
// an alternative to the shootTimer approach could be to define a length to his
// Open animation and add another animation event to do the shooting - I took this
// approach when I created Screw Driver because he does multiple firings - but Mambu
// is a single shot so I just use a timer instead of dragging out the animation
// Open - vulnerable to bullets (set in animation) and doesn't move on screen. animation
// switches to Open, shootTimer counts down then shoots his bullets when time is up.
// shootTimer is half of how long his shell stays open, so being one second open
// he fires at half a second in. there is a flag isShooting that is false initially
// and once he fires gets set to true so he doesn't keep firing - this ensures a single
// occurrence. openTimer counts down while in this state and once expires switches to
// his Closed state, sets closedTimer, and resets isShooting back to false.
// Note: the invincibility doesn't have to be set via animation events, they could be set during
// state changes by calling enemyController.Invincible(bool); however I wanted to show
// how to use the animations events for learning purposes.
switch (mambuState)
{
case MambuState.Closed:
animator.Play("Mambu_Closed");
rb2d.velocity = new Vector2(((isFacingRight) ? moveSpeed : -moveSpeed), rb2d.velocity.y);
closedTimer -= Time.deltaTime;
if (closedTimer < 0)
{
mambuState = MambuState.Open;
openTimer = openDelay;
shootTimer = shootDelay;
}
break;
case MambuState.Open:
animator.Play("Mambu_Open");
rb2d.velocity = new Vector2(0, rb2d.velocity.y);
shootTimer -= Time.deltaTime;
if (shootTimer < 0 && !isShooting)
{
ShootBullet();
isShooting = true;
}
openTimer -= Time.deltaTime;
if (openTimer < 0)
{
mambuState = MambuState.Closed;
closedTimer = closedDelay;
isShooting = false;
}
break;
}
}
public void SetState(MambuState state)
{
// set mambu state
mambuState = state;
// not shooting...yet
isShooting = false;
// set up the state timer we're starting with
if (mambuState == MambuState.Closed)
{
closedTimer = closedDelay;
}
else if (mambuState == MambuState.Open)
{
openTimer = openDelay;
}
}
