noisewave.h

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#pragma once
 
#include "fl/stl/noexcept.h"
 
#include "fl/fx/fx1d.h"
#include "noisegen.h"
 
namespace fl {
 
FASTLED_SHARED_PTR(NoiseWave);
 
class NoiseWave : public Fx1d {
  public:
    NoiseWave(u16 num_leds) FL_NO_EXCEPT
        : Fx1d(num_leds), noiseGeneratorRed(500, 14),
          noiseGeneratorBlue(500, 10) {}
 
    void draw(DrawContext context) FL_NO_EXCEPT override {
        if (context.leds.empty() || mNumLeds == 0) {
            return;
        }
        if (start_time == 0) {
            start_time = context.now;
        }
 
        unsigned long time_now = fl::millis() - start_time;
 
        for (i32 i = 0; i < mNumLeds; ++i) {
            int r = noiseGeneratorRed.LedValue(i, time_now);
            int b = noiseGeneratorBlue.LedValue(i, time_now + 100000) >> 1;
            int g = 0;
            context.leds[i] = CRGB(r, g, b);
        }
    }
 
    fl::string fxName() const FL_NO_EXCEPT override { return "NoiseWave"; }
 
  private:
    NoiseGenerator noiseGeneratorRed;
    NoiseGenerator noiseGeneratorBlue;
    fl::u32 start_time = 0;
};
 
} // namespace fl