三つの円エフェクト

https://scrapbox.io/files/64d0f55c635dd7001cfd038b.png

code:三つの円エフェクト.cpp

# include <Siv3D.hpp>

struct ThreeRingEffect : IEffect

{

Vec2 m_pos;

ColorF m_color;

//Vec2 位置, ColorF 色

explicit ThreeRingEffect(const Vec2& pos, const ColorF& color = Palette::Orange)

: m_pos{ pos }

, m_color{ color } {}

bool update(double t) override

{

ScopedRenderStates2D blend{ BlendState::Additive };

for (const auto i : step(3)) {

Circle{ OffsetCircular{ m_pos, 10,-t * 180_deg + i * 120_deg }, (t * 50) }.drawFrame(4, ColorF{ m_color ,1 - t });

}

return (t < 1.0);

}

};

void Main()

{

Effect effect;

while (System::Update())

{

if (MouseL.down())

{

effect.add<ThreeRingEffect>(Cursor::Pos());

}

effect.update();

}

}