public void update(GameTime gameTime, QuadTree quadTree)
{
if (!beamOn)
{
return;
}
beamQuanta.Clear();
//beamQuantum = new Rectangle((int) position.X, (int) position.Y, 1, 3);
beamDirection = new Vector2((float)Math.Sin(rotation), (float)-Math.Cos(rotation));
Ray2 ray = new Ray2(position, beamDirection * beamLength);
distToTarget = 1;
// find targets within line of fire
/*List<Tangible> possibleCollisions = quadTree.retrieveNeighbors(owner);*/
/* This method and may result in missed ships.
* A different retriever using a raycast
* will likely be necessary. -Tristan-*/
List <Tangible> possibleCollisions = GameplayScreen.targets;
Tangible currentTarget = null;
foreach (Tangible target in possibleCollisions)
{
if (target != owner && target.isActive)
{
if (ray.intersectsToRange(target.getHitBox()))
{
float temp = ray.getDistance();
if (temp <= distToTarget)
{
// fine hit detection
narrowCheck(target, temp, ref currentTarget);
}
}
}
}
if (currentTarget != null)
{
doDamage(currentTarget, gameTime);
}
frameIndex = startQuanta;
for (int i = 0; i < beamLength * distToTarget; ++i)
{
beamQuanta.Add(getNextQuanta());
if (++frameIndex > 4)
{
frameIndex = 0;
}
}
if (--startQuanta < 0)
{
startQuanta = 4;
}
beamOn = false;
}