キラキラ

https://gyazo.com/cdcf3e6b2e5f24c5ca6073f2bf9b1864

code:twinkle.cpp

struct Twinkle : IEffect

{

Vec2 pos;

double angle;

double scale;

Twinkle(const Vec2 pos) : pos(pos), angle(Sample({ 0_deg, 45_deg })), scale(Random(0.2, 1.0))

{

}

bool update(double t) override

{

scale *= 0.988;

const double outer = (4 + 25 + 25 * Sin(t * 6_pi)) * scale;

const double inner = (0.5 + 1 + 1 * Sin(t * 6_pi)) * scale;

Shape2D::NStar(4, outer, inner, pos, angle).draw(Alpha(1 + 120 + 120 * Sin(t * 6_pi)));

return t < 0.50;

}

};

void Main()

{

Effect effect;

double timeFxSpawned = 0;

while (System::Update())

{

if (Scene::Time() - timeFxSpawned > 0.03)

{

effect.add<Twinkle>(Cursor::Pos() + RandomVec2(Random(80.0)));

timeFxSpawned = Scene::Time();

}

effect.update();

}

}