Method sparkBlock

source/game/StarProjectile.cpp:495–524

}

List<Particle> Projectile::sparkBlock(World* world, Vec2I const& position, Vec2F const& damageSource) {
  auto& root = Root::singleton();
  auto assets = root.assets();
  auto materialDatabase = root.materialDatabase();

  auto blockDamageParticle = Particle(assets->json("/client.config:blockDamageParticle"));
  auto blockDamageVariance = Particle(assets->json("/client.config:blockDamageParticleVariance"));

  List<Particle> result;
  for (auto layer : {TileLayer::Background, TileLayer::Foreground}) {
    auto material = world->material(position, layer);
    auto hueShift = world->materialHueShift(position, layer);
    if (isRealMaterial(material)) {
      auto particle = blockDamageParticle;
      particle.position += centerOfTile(position);
      particle.velocity = particle.velocity.magnitude() * vnorm(world->geometry().diff(damageSource, particle.position));
      particle.color = materialDatabase->materialParticleColor(material, hueShift);
      particle.applyVariance(blockDamageVariance);

      particle.approach += Vec2F(0.0f, 5.0f);
      particle.velocity += Vec2F(Random::randf() - 0.5f, 5.0f + Random::randf());
      particle.velocity += 10.0f * Vec2F(1.0f - 2.0f * Random::randf(), 1.0f - 2.0f * Random::randf());
      particle.finalVelocity = 0.5f * (particle.finalVelocity + Vec2F(Random::randf() - 0.5f, -20.0f + Random::randf()));
      particle.trail = true;

      result.append(std::move(particle));
    }
  }
  return result;
}

int Projectile::getFrame() const {
  float time_per_frame = m_animationCycle / m_config->frameNumber;