draw()

void fl::Luminova::draw ( DrawContext context )

overridevirtual

Parameters

now	The current time in milliseconds. Fx writers are encouraged to use this instead of millis() directly as this will more deterministic behavior.

Implements fl::Fx.

Definition at line 86 of file luminova.cpp.

                                       {
    // Fade + blur trails each frame
    fadeToBlackBy(context.leds, getNumLeds(), 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;
        uint8_t n2 = inoise8(static_cast<uint16_t>(tOver99 * 4096.0f), static_cast<uint16_t>(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 += ::cosf(aa);
        p.y += ::sinf(aa);
 
        plotSoftDot(context.leds, p.x, p.y, p.s);
    }
 
    ++mTick;
}

References fl::Luminova::Particle::a, fl::Luminova::Particle::alive, fl::blur2d(), fl::Luminova::Particle::f, fl::fadeToBlackBy(), fl::Luminova::Particle::g, fl::Fx2d::getHeight(), fl::Fx::getNumLeds(), fl::Fx2d::getWidth(), inoise8(), fl::_DrawContext::leds, mParams, mParticles, mTick, fl::Fx2d::mXyMap, plotSoftDot(), resetParticle(), fl::Luminova::Particle::s, fl::Luminova::Particle::x, and fl::Luminova::Particle::y.

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