チョウのようなものの群れが飛んで行く

https://gyazo.com/1e048759f8db84fba69785e4c5e1d4bc

code:whites.cpp

#include <Siv3D.hpp> // OpenSiv3D v0.6.11

void Main()

{

std::list<std::tuple<Vec2, int, int>> whites;

Iota(32).each(&(auto) { whites.push_back(std::make_tuple(RandomVec2(Scene::Rect()), 0, Random(5, 9))); });

Array<Vec2> bones{ 6 };

bones0 = Circular{ 10, 170_deg };

bones1 = Circular{ 18, 85_deg };

bones2 = Circular{ 8, -60_deg };

bones3 = Circular{ 10, 140_deg };

bones4 = Circular{ 16, 60_deg };

bones5 = Circular{ 7, 40_deg };

double timeSpawned = 0;

while (System::Update())

{

Scene::Rect().draw(Color(120));

if (Scene::Time() - timeSpawned > 0.016 * 4)

{

whites.push_back(std::make_tuple(Vec2{ Scene::Width(), Random(Scene::Height()) }, 0, Random(5, 9)));

timeSpawned = Scene::Time();

}

for (auto& w : whites)

{

const int t = (std::get<1>(w) / std::get<2>(w)) % 2;

const Array<Vec2> r{ 4, Arg::generator = []() { return RandomVec2(2.0); } };

Triangle{ Vec2{} + r0, bonest * 3 + 1 + r1, bonest * 3 + 0 + r2 }.movedBy(std::get<0>(w)).draw(Color(240));

Triangle{ Vec2{} + r0, bonest * 3 + 2 + r3, bonest * 3 + 0 + r2 }.movedBy(std::get<0>(w)).draw(Color(230));

std::get<0>(w) += Vec2{ Random(-6.0, 2.0), Random(-4.0, 4.0) };

std::get<1>(w)++;

}

whites.remove_if([](auto& w) { return !Scene::Rect().intersects(std::get<0>(w)); });

}