魔法陣

https://scrapbox.io/files/64414875739542001b365055.png

使い方

MagicCircle(Circle 円,ColorF 色);

用途

魔法演出などに使えます。

コード

code:魔法陣.cpp

# include <Siv3D.hpp>

void MagicCircle(const Circle& circle, const ColorF& color)

{

const Vec2 center = circle.center;

const double r = circle.r;

const double rate = circle.r / 135;

for (auto i : step(2))

{

const double d = (i == 0 ? 3 * rate : 2 * rate);

const ColorF c = (i == 0 ? color : ColorF{ 1 });

Circle(center, r).drawFrame(d, c);

Circle(center, 120 * rate).drawFrame(d, c);

Triangle(center, 200 * rate).drawFrame(d, c);

Triangle(center, 200 * rate, 180_deg).drawFrame(d, c);

Shape2D::NStar(24, r, 120 * rate, center).drawFrame(d, c);

Shape2D::NStar(24, r, 120 * rate, center, 180_deg / 24).drawFrame(d, c);

for (int32 j : step(6))

{

const double theta = j * 60_deg + 30_deg;

const Vec2 vec = OffsetCircular{ center, 95 * rate, theta };

Circle{ vec, 15 * rate }.drawFrame(d, c);

}

}

}

void Main()

{

while (System::Update())

{

MagicCircle(Circle{ 400,300, 200 }, HSV{ Scene::Time() * 60 });

}

}