// constructor
protected Missile(GameSettings _settings, Point _initialPos, double _speed, Point _targetPos)
{
settings = _settings;
startPos = _initialPos;
targetPos = _targetPos;
speed = _speed;
curPos = startPos;
destroyed = false;
destroyedType = MissileDestroyedType.None;
collidable = true;
// create trail
trailShape = CreateTrailShape(_settings, _initialPos);
// create missile head
headShape = CreateHeadShape(_settings);
// update colors of shapes
UpdateColors();
// shapes collection
shapes = new List <Shape>();
shapes.Add(trailShape);
shapes.Add(headShape);
}
// method for handling missile being destroyed
override protected void WasDestroyed(MissileDestroyedType _reason)
{
// check reason
// only generate an explosion on reaching target position
if (_reason == MissileDestroyedType.ReachedTarget)
{
// create in air explosion at current position
explosion = new Explosion(settings, ExplosionType.InAir, curPos);
}
}
// method for handling missile being destroyed
override protected void WasDestroyed(MissileDestroyedType _reason)
{
// check reason
// if none, do nothing
// if collided
if (_reason == MissileDestroyedType.Collided)
{
// generate in-air explosion at current position
explosion = new Explosion(settings, ExplosionType.InAir, curPos);
}
else if (_reason == MissileDestroyedType.ReachedTarget)
{
// tell target it has been impacted
target.Impacted(this);
// generate impact explosion at target position
explosion = new Explosion(settings, ExplosionType.Impact, targetPos);
}
}
// destroy projectile at current position
public void SetDestroyed(MissileDestroyedType _reason)
{
// check if explosion obj is already available
if (explosion != null)
{
// throw an exception to test for sync issues
throw new InvalidOperationException("Missile is destroyed already");
}
// set destroyed
destroyed = true;
destroyedType = _reason;
// call WasDestroyed with reason
// will generate explosion obj accordingly
WasDestroyed(_reason);
}
// abstract method for when the missile is destroyed // should handle whatever it needs and create the explosion object abstract protected void WasDestroyed(MissileDestroyedType _reason);
