bee.cpp

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

void DrawText(StringView text, const Vec2& pos, const Vec2& scale, const Color& color, const Color& outlineColor, double outlineWidth, double letterSpacingScale)
{
	Vec2 penPos{ pos };

	{
		const auto& font = FontAsset(U"LI");

		const ScopedCustomShader2D shader{ Font::GetPixelShader(font.method(), TextStyle::Type::Outline) };
		Graphics2D::SetSDFParameters(TextStyle::Outline(outlineWidth, 0.0, outlineColor));

		for (auto [index, glyph] : Indexed(font.getGlyphs(text)))
		{
			glyph.texture.scaled(scale).draw(penPos + glyph.getOffset(), color);
			penPos.x += glyph.xAdvance * scale.x * letterSpacingScale;
		}
	}
}

void DrawTextAt(StringView text, const Vec2& pos, const Vec2& scale, const Color& color, const Color& outlineColor, double outlineWidth, double letterSpacingScale)
{
	const auto region = FontAsset(U"LI")(text).region();
	DrawText(text, pos.movedBy(-region.w * scale.x * 0.9 / 2, -region.h * scale.y / 2), scale, color, outlineColor, outlineWidth, letterSpacingScale);
}

double Time0_1(double beginSec, double durationSec, double easing(double) = EaseInLinear, double timeSec = Scene::Time())
{
	return easing(Clamp((timeSec - beginSec) / durationSec, 0.0, 1.0));
}

void Main()
{
	Scene::SetBackground(ColorF{ U"#fcd22e" });

	const Texture bee{ U"🐝"_emoji };

	FontAsset::Register(U"LI", FontMethod::MSDF, 48, Typeface::Black, FontStyle::BoldItalic);

	while (System::Update())
	{
		const double moveCamXY = 800.0 - 800.0 * Time0_1(1.3, 0.5, EaseOutSine);
		const Transformer2D transformer1{ Mat3x2::Scale(1.3, Scene::CenterF()).translated(Vec2{ 0 - moveCamXY / 2, -40 - moveCamXY }) };


		// Layout

		const Vec2 beePosBase = Scene::CenterF().movedBy(0, -100);
		const Vec2 beePos = beePosBase + Vec2{ 800 - 800 * Time0_1(1.3, 2.5, EaseOutQuad), 0 };
		const Vec2 label1Pos = beePosBase.movedBy(0, 100);
		const Vec2 label2Pos = label1Pos.movedBy(0, 70);
		const Vec2 framePos = (label1Pos + label2Pos) / 2;

		{
			const double color = Time0_1(1.5, 3.2, EaseOutSine);
			const double alpha = Time0_1(1.5, 0.4);
			const ScopedColorMul2D colorMul{ ColorF(0.6 + 0.4 * color, alpha) };

			const double frameScale = Time0_1(1.5, 0.7, EaseOutBounce);
			const Transformer2D transformer2{ Mat3x2::Scale(frameScale, Scene::Center()) };


			// Frame

			const auto frame = Shape2D::Ngon(6, 180, framePos, 0).asPolygon();

			// shadow
			const double shadowMoveXY = 10.0 * Time0_1(3.5, 0.7);
			frame.scaledAt(framePos, 1.05).movedBy(shadowMoveXY * 0.8, shadowMoveXY * 1.1).draw(ColorF{0, 0.15});

			// white outline
			frame.drawFrame(14.0, ColorF{ 1 });

			// blue
			frame.draw(ColorF{ U"#434299" });

			// red
			const auto vertices = frame.vertices()
				.map([&](const auto& v) { return v.y < framePos.y ? Vec2{ v.x, framePos.y + 7 } : Vec2{ v }; });
			Polygon{ vertices }.draw(ColorF{ U"#e23118" });

			// shadow (inner)
			frame.scaledAt(framePos, 0.97).drawFrame(12.0, ColorF{ 0, 0.2 });

			// gold outline
			frame.drawFrame(9.0, ColorF{ U"#d08e44" });

			// outline gleam
			{
				const ScopedRenderStates2D blend{ BlendState::Additive };
				const double alpha = (1.0 - Time0_1(4.2, 1.2)) * Time0_1(4.2, 1.2);
				frame.outline(Scene::Time() * 1500, 700).draw(9.0, ColorF{ 0.50 * alpha });
				frame.outline(Scene::Time() * 1450, 700).draw(9.0, ColorF{ 0.30 * alpha });
				frame.outline(Scene::Time() * 1400, 700).draw(9.0, ColorF{ 0.10 * alpha });
			}


			// Label1

			DrawTextAt(U"ハチアブ", label1Pos.movedBy(-6, 0), Vec2{ 1.45, 1.95 }, ColorF{ U"#fff02e" }.withAlpha(alpha), ColorF{0}.withAlpha(alpha), 0.75, 0.9);


			// Label2

			const Vec2 label2APos = label2Pos.movedBy(-10, 4);
			const Vec2 label2BPos = label2Pos.movedBy(10, 48);
			const Vec2 shadowOffset{ 6, 2 };
			const Vec2 label2Scale{ 1.3, 1.2 };
			const ColorF label2ShadowColor = ColorF{ 1, alpha };
			const ColorF label2ShadowOutlineColor = AlphaF(0);
			const ColorF label2Color = ColorF{ U"#33336f" }.withAlpha(alpha);
			const ColorF label2OutlineColor = ColorF{ 1 }.withAlpha(alpha);

			DrawTextAt(U"ハイパー", label2APos + shadowOffset, label2Scale, label2ShadowColor, label2ShadowOutlineColor, 0, 0.85);
			DrawTextAt(U"ジェット", label2BPos + shadowOffset, label2Scale, label2ShadowColor, label2ShadowOutlineColor, 0, 0.85);

			DrawTextAt(U"ハイパー", label2APos, label2Scale, label2Color, label2OutlineColor, 0.6, 0.85);
			DrawTextAt(U"ジェット", label2BPos, label2Scale, label2Color, label2OutlineColor, 0.6, 0.85);
		}


		// Bee

		{
			const ScopedRenderStates2D blend{ BlendState::Additive };

			// flash
			const double alpha = 0.9 * Time0_1(3.5, 1.0);
			Shape2D::NStar(16, 72, 32, beePosBase, Periodic::Sawtooth0_1(30s) * Math::TwoPi).draw(ColorF(0.4, alpha));
			Shape2D::NStar(24, 80, 48, beePosBase, -Periodic::Sawtooth0_1(40s) * Math::TwoPi).draw(ColorF(0.2, alpha));

			// light
			Circle{ beePosBase, 200 }.drawShadow(Vec2{}, 300.0, 150.0, ColorF{ 1.0, 0.10 * alpha });
		}

		bee.scaled(0.75).drawAt(beePos);
	}
}

b.mp4