/// <summary>
/// When entering a zone, checks if it's a Gravity Zone, and if yes, sets gravity accordingly
/// </summary>
/// <param name="collider">Collider.</param>
protected virtual void OnTriggerEnter2D(Collider2D collider)
{
// if this is not a gravity zone, we do nothing and exit
GravityZone gravityZone = collider.gameObject.GetComponentNoAlloc <GravityZone> ();
if ((gravityZone == null) || !SubjectToGravityZones)
{
return;
}
// if we've entered another zone before exiting the one we are in, we cache the previous one to prevent glitches later
if (_currentGravityZone != null && _currentGravityZone != gravityZone)
{
_cachedGravityZone = _currentGravityZone;
}
// we store our new gravity zone
_currentGravityZone = gravityZone;
// if we're over our inactive buffer, we set it
if (Time.time - _entryTimeStampZones > InactiveBufferDuration)
{
SetGravityZone(gravityZone);
}
}
/// <summary>
/// Sets the specified gravity zone as the current one, applying its gravity properties to our character
/// </summary>
/// <param name="gravityZone">Gravity zone.</param>
protected virtual void SetGravityZone(GravityZone gravityZone)
{
// we apply our inactive buffer duration
_entryTimeStampZones = Time.time;
// we override our gravity
_gravityOverridden = true;
_overrideGravityAngle = gravityZone.GravityDirectionAngle;
_inAGravityZone = true;
StartRotating();
// we transition our character's state
Transition(true, gravityZone.GravityDirectionVector);
}
/// <summary>
/// When exiting a gravity zone we reset our gravity and handle transition
/// </summary>
/// <param name="gravityZone">Gravity zone.</param>
protected virtual void ExitGravityZone(GravityZone gravityZone)
{
_entryTimeStampZones = Time.time;
// we reset our gravity
_gravityOverridden = false;
_inAGravityZone = false;
StartRotating();
// we transition our character's state
if (gravityZone)
{
Transition(false, gravityZone.GravityDirectionVector);
}
}
/// <summary>
/// When exiting a zone, checks if it was a Gravity Zone, and if yes, resets gravity accordingly
/// </summary>
/// <param name="collider">Collider.</param>
protected virtual void OnTriggerExit2D(Collider2D collider)
{
// if this is not a gravity zone, we do nothing and exit
GravityZone gravityZone = collider.gameObject.GetComponentNoAlloc <GravityZone> ();
if ((gravityZone == null) || !SubjectToGravityZones)
{
return;
}
// if the zone we are leaving is the one we had cached, we reset our stored grav zone
if (gravityZone == _cachedGravityZone)
{
_cachedGravityZone = null;
}
// if the zone we are leaving is the current active one or if we have one in cache, we don't trigger exit for this zone or apply the cached gravity
if (_currentGravityZone != gravityZone || _cachedGravityZone != null)
{
if (_cachedGravityZone != null)
{
_currentGravityZone = _cachedGravityZone;
if (Time.time - _entryTimeStampZones > InactiveBufferDuration)
{
SetGravityZone(_currentGravityZone);
}
}
return;
}
// we're not in a gravity zone anymore
_currentGravityZone = null;
// we apply our inactive buffer duration
if (Time.time - _entryTimeStampZones > InactiveBufferDuration)
{
ExitGravityZone(gravityZone);
}
}