ring()

void mood_ring::RingCanvas::ring	(	float	origin,
		float	radius,
		float	sigma,
		const RGBf &	color,
		float	gain )

Add a band at distance radius (turns, 0..0.5) from origin, on both sides of it at once: an expanding pulse ring.

Definition at line 122 of file ring_canvas.cpp.

                                                     {
    const int n = size();
    if (n <= 0 || gain <= 0.0f || sigma <= 0.0f)
        return;
    for (int i = 0; i < n; ++i) {
        float d = ringDistance(posOf(i), origin) - radius;
        if (d < 0.0f)
            d = -d;
        const float k = falloff(d, sigma);
        if (k <= 0.0f)
            continue;
        pixel(i, color, gain * k);
    }
}

References mood_ring::falloff(), pixel(), posOf(), mood_ring::ringDistance(), and size().

Referenced by mood_ring::MoodPainter::drawPulses().

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