Effect_KR.h

//mode 1: red kr effect
//mode 2: rainbow kr effect
//mode 3: sound reactive kr effect (hue shift)

#define KR_WIDTH 12   // width of KR-band
#define KR_BORDER (KR_WIDTH/4)
#define KR_DIMSPEED 23
#define KR_BPM 20

void effectKRCommon() {
  dimLeds(KR_DIMSPEED , &leds[OCTO_OFFSET], 1);
  
  uint8_t startPos = beatsin8(KR_BPM,0,M_WIDTH-KR_WIDTH);
  uint8_t top, bottom;
  if(M_HEIGHT > 4) {
    bottom = M_HEIGHT/4;
    top = M_HEIGHT-(M_HEIGHT/4);
  } else {
    bottom = 0;
    top = M_HEIGHT;
  }
  for(uint8_t i=bottom; i<top; i++) {
    for(uint8_t j=startPos;j<startPos+KR_WIDTH;j++) {
      leds[XY(j,i)] += currColor;
      // fade out edges of square. -- idea: fade out in a circle or oval to get more of a HAL-9000 look...
      if((j<startPos+KR_BORDER) || (j>(startPos+KR_WIDTH-1-KR_BORDER))) {
        leds[XY(j,i)].fadeToBlackBy(64);
      }
      if(i==bottom || i==(top-1)) {
        leds[XY(j,i)].fadeToBlackBy(128);
        if(j==startPos || j==(startPos+KR_WIDTH-1)) {
          leds[XY(j,i)].fadeToBlackBy(128);
        }
      }
    }
  }
}

void eff_redKR() {
  if(!cnf.isModeInit) {
    cnf.currDelay = DELAY_KR;
    cnf.currBright = NORMBRIGHT;
    currColor = CRGB(192,6,0); // red
    cnf.canShowText = 0;
    cnf.isModeInit = true;
  }
  effectKRCommon();
}

void eff_rainbowKR() {
  if(!cnf.isModeInit) {
    cnf.currDelay = DELAY_KR;
    cnf.currBright = NORMBRIGHT;
    cnf.canShowText = 0;
    cnf.isModeInit = true;
  }
  currColor = CHSV(cnf.currHue,255,255);
  effectKRCommon();
}

void eff_soundKR() {
  if(!cnf.isModeInit) {
    cnf.currDelay = DELAY_KR;
    cnf.currBright = NORMBRIGHT;
    cnf.canShowText = 0;
    cnf.isModeInit = true;
  }
  currColor = Wheel(520 + cnf.eqVol[1]);
  currColor.fadeToBlackBy(128-(cnf.eqVol[1]/2));
  effectKRCommon();
}