マウスクリック位置にエフェクト

https://gyazo.com/18d837e4bd4b82bc80824be643e09cd2

アズールなんとかのタッチエフェクトを目コピーしました。

code:click_effect.cpp

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

struct ClickEffect : IEffect

{

Vec2 m_pos;

Effect& m_effect;

ClickEffect(const Vec2& pos, Effect& effect)

: m_pos{ pos }

, m_effect{ effect }

{

}

bool update(double) override

{

m_effect.add<ClickEffect1>(m_pos);

m_effect.add<ClickEffect2>(m_pos);

for (int i : step(8))

{

const double angle = Random(Math::TwoPi);

m_effect.add<ClickEffect3>(

m_pos + Circular(Random(5, 35), angle),

Circular(80, angle));

}

return false;

}

struct ClickEffect1 : IEffect

{

Vec2 m_pos;

ClickEffect1(const Vec2& pos)

: m_pos{ pos }

{

}

bool update(double t) override

{

const double lifetime = 0.30;

const double t_0_1 = Clamp(t / lifetime, 0.0, 1.0);

const double size = 15 + 45 * EaseInOutSine(t_0_1);

const double alpha = 1.0 - 1.0 * EaseInCubic(t_0_1);

RectF{ size }

.setCenter(m_pos)

.rotatedAt(m_pos, 45_deg)

.drawFrame(5.0 - 5.0 * EaseInCubic(t_0_1), ColorF{ Palette::Aqua, alpha });

return (t < lifetime);

}

};

struct ClickEffect2 : IEffect

{

Vec2 m_pos;

ClickEffect2(const Vec2& pos)

: m_pos{ pos }

{

}

bool update(double t) override

{

const double delay = 0.10;

const double lifetime = delay + 0.30;

if (t >= delay)

{

const double t_0_1 = Clamp((t - delay) / lifetime, 0.0, 1.0);

const double size = 10 + 70 * (t_0_1);

const double alpha = 1.0 - 1.0 * (t_0_1);

RectF{ size }

.setCenter(m_pos)

.rotatedAt(m_pos, 45_deg)

.drawFrame(1.5 - 0.5 * t_0_1, ColorF{ Palette::Aqua, alpha });

}

return (t < lifetime);

}

};

struct ClickEffect3 : IEffect

{

Vec2 m_pos;

Vec2 m_vel;

double m_size;

ClickEffect3(const Vec2& pos, const Vec2& vel)

: m_pos{ pos }

, m_vel{ vel }

, m_size{ Random(4.0, 15.0) }

{

}

bool update(double t) override

{

const double lifetime = 0.28;

const double t_0_1 = Clamp(t / lifetime, 0.0, 1.0);

const double size = m_size * (1.0 - t_0_1);

const double alpha = 1.0 - 1.0 * (t_0_1);

m_pos += m_vel * Scene::DeltaTime();

RectF{ size }

.setCenter(m_pos)

.rotatedAt(m_pos, t_0_1 * 60_deg)

.drawFrame(3.0, ColorF{ Palette::Aqua, alpha });

return (t < lifetime);

}

};

};

void Main()

{

Scene::SetBackground(ColorF{ U"#05070F" });

Effect effect;

while (System::Update())

{

if (MouseL.down())

{

effect.add<ClickEffect>(Cursor::PosF(), effect);

}

effect.update();

}

}