MD_EyePair.h

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// Implements a class to draw and animate a pair of eyes
#pragma once
 
#include "Led-Matrix-SOLDERED.h"
 
// Misc defines
#define EYEBALL_ROWS     8  // number of rows in the eyeball definition
#define RANDOM_SEED_PORT A0 // for random seed bit shuffling
 
class MD_EyePair
{
  public:
    MD_EyePair(void);
    ~MD_EyePair(void){};
 
    void begin(uint8_t startdev, Led_Matrix *M, uint16_t maxDelay);
    void animate(void);
 
  protected:
    // Pupil related information
    enum posPupil_t // Initials are for Top, Middle and Bottom; Left, Center and Right (eg, TL = Top Left)
    {
        P_TL = 0,
        P_TC = 1,
        P_TR = 2,
        P_ML = 3,
        P_MC = 4,
        P_MR = 5,
        P_BL = 6,
        P_BC = 7,
        P_BR = 8
    };
 
    // Class static data
    static uint8_t _pupilData[];
    static uint8_t _eyeballData[];
 
    // display parameters
    Led_Matrix *_M;
    uint8_t _sd; // start device
    uint8_t _ed; // end device
 
    // blinking parameters
    uint32_t _lastBlinkTime;
    uint16_t _currentDelay;
    uint8_t _blinkState;
    uint8_t _savedEyeball[EYEBALL_ROWS];
    uint8_t _blinkLine;
 
    // animation parameters
    posPupil_t _pupilCurPos; // the current position for the pupil
    uint32_t _timeLast;
    uint16_t _timeDelay;
    uint16_t _maxDelay;
    bool _inBlinkCycle;
 
    // methods
    void drawEyeball(void);
    bool blinkEyeball(bool bFirst);
    void drawPupil(posPupil_t posOld, posPupil_t posNew);
    bool posIsAdjacent(posPupil_t posCur, posPupil_t posNew);
 
    // random seed creation
    uint16_t bitOut(uint8_t port);
    uint32_t seedOut(uint16_t noOfBits, uint8_t port);
};