Method DrawParticles

src/weather.cpp:198–227

}

void Weather::DrawParticles(Bitmap& dst, const Bitmap& particle, const Rect rect, int abase, int tmax) {
	auto* bitmap = ApplyToneEffect(particle, rect);

	const auto strength = Main_Data::game_screen->GetWeatherStrength();
	const auto& particles = Main_Data::game_screen->GetParticles();

	const int num_particles = num_rain_or_snow_particles[Utils::Clamp(strength, 0, num_strength - 1)];
	const auto ainc = abase + strength;

	auto surface_rect = weather_surface->GetRect();
	weather_surface->Clear();

	assert(num_particles <= static_cast<int>(particles.size()));

	for (int i = 0; i < num_particles; ++i) {
		auto& p = particles[i];
		if (p.t > tmax) {
			continue;
		}

		auto alpha = std::min(ainc * p.t, 255);

		weather_surface->EdgeMirrorBlit(p.x, p.y, *bitmap, rect, true, true, alpha);
	}

	const auto shake_x = Main_Data::game_screen->GetShakeOffsetX();
	const auto shake_y = Main_Data::game_screen->GetShakeOffsetY();
	auto pan_rect = Main_Data::game_screen->GetScreenEffectsRect();
	dst.TiledBlit(-pan_rect.x + shake_x, -pan_rect.y + shake_y, surface_rect, *weather_surface, dst.GetRect(), Opacity::Opaque());
}

void Weather::DrawFog(Bitmap& dst) {
	if (!fog_bitmap) {