59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
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#pragma once
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#include <random>
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#include <list>
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#include "Animation.h"
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#include "fasttrigon.h"
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class SnowfallAnimation : public Animation
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{
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public:
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SnowfallAnimation(Fader *fader);
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void loop(uint64_t frame) override;
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void stop(void) override
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{
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m_stopping = true;
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}
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void reset(void) override;
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private:
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class SnowFlake
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{
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public:
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SnowFlake(Fader *fader, int32_t phase, int32_t vertSpeed, int32_t baseStrip);
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void move(void);
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bool has_fallen(void) const;
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void render(void) const;
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int32_t cur_strip(void) const;
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private:
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Fader *m_fader;
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int32_t m_phase;
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int32_t m_phaseIncPerFrame;
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int32_t m_vertSpeed; // in 1/256 LEDs
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int32_t m_radius; // in 1/256 LEDs
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int32_t m_radiusSq; // in 1/256 LEDs
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int32_t m_basePosStrip; // in 1/256 strips (for speed only)
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int32_t m_posStrip; // in 1/256 strips
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int32_t m_posLED; // in 1/256 LEDs
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};
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std::list<SnowFlake> m_snowFlakes;
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std::vector<uint32_t> m_snowLevel; // level for each strip in 1/256 LEDs
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std::default_random_engine m_gen;
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bool m_stopping;
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};
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