Method draw

src/fl/fx/2d/luminova.cpp.hpp:96–136

}

void Luminova::draw(DrawContext context) {
    // Fade + blur trails each frame
    fadeToBlackBy(context.leds, mParams.fade_amount);
    blur2d(context.leds, static_cast<fl::u8>(getWidth()), static_cast<fl::u8>(getHeight()),
           mParams.blur_amount, mXyMap);

    // Spawn/overwrite one particle per frame, round-robin across pool
    if (!mParticles.empty()) {
        size_t idx = static_cast<size_t>(mTick % static_cast<fl::u32>(mParticles.size()));
        resetParticle(mParticles[idx], mTick);
    }

    // Update and draw all particles
    for (size_t i = 0; i < mParticles.size(); ++i) {
        Particle &p = mParticles[i];
        if (!p.alive) {
            continue;
        }

        // s *= 0.997
        p.s *= 0.997f;
        if (p.s < 0.5f) {
            p.alive = false;
            continue;
        }

        // angle jitter using 2D noise: (t/99, g)
        float tOver99 = static_cast<float>(mTick) / 99.0f;
        u8 n2 = inoise8(static_cast<u16>(tOver99 * 4096.0f), static_cast<u16>(p.g * 37));
        float n2c = (static_cast<int>(n2) - 128) / 255.0f; // ~ -0.5 .. +0.5
        p.a += (n2c) / 9.0f;

        float aa = p.a * static_cast<float>(p.f);
        p.x += fl::cosf(aa);
        p.y += fl::sinf(aa);

        plotSoftDot(context.leds, p.x, p.y, p.s);
    }

    ++mTick;
}

} // namespace fl