2.0 Asteroid chunk update loop

SpacePlatform.cpp

void SpacePlatform::updateAsteroidChunks()
{
  if (this->asteroidChunks.empty())
    return;

  const SimpleBoundingBox asteroidSpawningArea = this->getAsteroidSpawningArea();
  const double left = asteroidSpawningArea.leftTop.x.getDouble();
  const double top = asteroidSpawningArea.leftTop.y.getDouble();
  const double right = asteroidSpawningArea.rightBottom.x.getDouble();
  const double bottom = asteroidSpawningArea.rightBottom.y.getDouble();
  auto collidesWithSpawningArea = [=, zero = left == right && top == bottom](const Vector position) -> bool
  {
    if (zero)
      return false;
    if (left > position.x)
      return false;
    if (top > position.y)
      return false;
    if (right < position.x)
      return false;
    if (bottom < position.y)
      return false;
    return true;
  };
  auto shouldAsteroidDespawn = [=, center = asteroidSpawningArea.getCenter().toVector()](const AsteroidChunk& asteroidChunk) -> bool
  {
    const Vector position = asteroidChunk.getPositionVector();
    const Vector movement = asteroidChunk.getVelocity();
    return !collidesWithSpawningArea(position) &&
           (center - position).dot(movement) <= 0; // Going away from the platform.
  };

  size_t size = this->asteroidChunks.size();
  for (size_t i = 0; i < size;)
  {
    if (this->asteroidChunks[i].update(*this->surface) ||
        shouldAsteroidDespawn(this->asteroidChunks[i]))
    {
      this->asteroidChunks[i].clearTargetingMe();
      if (i + 1 != size)
      {
        this->asteroidChunks[i] = std::move(this->asteroidChunks.back());
        if (i < this->nextAsteroidChunkUpdateIndex)
          this->updateAsteroidChunkTracking(this->asteroidChunks[i]);
      }
      this->asteroidChunks.pop_back();
      --size;
    }
    ++i;
  }
}