/// <summary>
/// Update the AI in circling mode
/// </summary>
/// <param name="lev">Current level</param>
/// <param name="wo">WorldObject that owns the AI</param>
private void UpdateFlybyCircling(Level lev, WorldObject wo)
{
// Cache some parameters
Player p = lev.Player;
float deltaPlayerX = p.WorldX - wo.WorldX;
float deltaPlayerY = p.WorldY - wo.WorldY;
// If far enough from player then switch to attack mode
if (Math.Abs(deltaPlayerX) >= MaxX)
{
wo.VelocityY = 0.0F;
flybyState = FlybyState.Attacking;
return;
}
// Move into circling position
if (wo.VelocityX > 0.0F)
{
ApplyPositiveAccelerationX(wo);
}
else
{
ApplyNegativeAccelerationX(wo);
}
if (deltaPlayerY < circleY)
{
ApplyNegativeAccelerationY(wo);
}
else
{
wo.WorldY = lev.Player.WorldY - circleY;
wo.VelocityY = 0.0F;
}
}
/// <summary>
/// Update the AI in attacking mode.
/// </summary>
/// <param name="lev">Current level</param>
/// <param name="wo">WorldObject that owns AI</param>
private void UpdateFlybyAttacking(Level lev, WorldObject wo)
{
// If shots are fired then prepare for next attack
// by chaning the mode to circling
if (attackLaunched)
{
wo.Walk();
flybyState = FlybyState.Circling;
attackLaunched = false;
return;
}
// Distance to any incoming shots
float shotDistX = 0.0F;
float shotDistY = 0.0F;
// Check if evasion is required
if (CheckDuck(wo, lev, ref shotDistX, ref shotDistY))
{
flybyState = FlybyState.Circling;
wo.VelocityY = 0.0F;
return;
}
// Cache some parameters
Player p = lev.Player;
float deltaPlayerX = p.WorldX - wo.WorldX;
float deltaPlayerY = p.WorldY - wo.WorldY;
// Check if conditions are right for attacking
if (Math.Abs(deltaPlayerX) <= MinX)
{
wo.VelocityY = 0.0F;
wo.Attack();
attackLaunched = true;
return;
}
// Move into attack position
if (deltaPlayerX > 0.0F)
{
ApplyPositiveAccelerationX(wo);
}
else
{
ApplyNegativeAccelerationX(wo);
}
if (deltaPlayerY > attackY)
{
ApplyPositiveAccelerationY(wo);
}
else
{
wo.WorldY = lev.Player.WorldY - attackY;
wo.VelocityY = 0.0F;
}
}
/// <summary>
/// When resetting a level, this AI type needs to reset some
/// extra data as well.
/// </summary>
public override void Reset()
{
base.Reset();
flybyState = FlybyState.Attacking;
attackLaunched = false;
}
