HSV to RGB (Arduino)

gistfile1.txt

void HSV_to_RGB(float h, float s, float v, byte &r, byte &g, byte &b)
{
  int i;
  float f,p,q,t;
  
  h = constrain(h, 0.0, 360.0);
  s = constrain(s, 0.0, 100.0);
  v = constrain(v, 0.0, 100.0);
  
  s /= 100;
  v /= 100;
  
  if (s == 0) {
    // Achromatic (grey)
    r = g = b = round(v*255);
    return;
  }

  h /= 60.0; 
  i = floor(h); // sector 0 to 5
  f = h - (float)i; // factorial part of h
  p = v * (1.0 - s);
  q = v * (1.0 - s * f);
  t = v * (1.0 - s * (1 - f));
  switch(i) {
    case 0:
      r = round(255*v);
      g = round(255*t);
      b = round(255*p);
      break;
    case 1:
      r = round(255*q);
      g = round(255*v);
      b = round(255*p);
      break;
    case 2:
      r = round(255*p);
      g = round(255*v);
      b = round(255*t);
      break;
    case 3:
      r = round(255*p);
      g = round(255*q);
      b = round(255*v);
      break;
    case 4:
      r = round(255*t);
      g = round(255*p);
      b = round(255*v);
      break;
    default: // case 5:
      r = round(255*v);
      g = round(255*p);
      b = round(255*q);
    }
}

6-year-old upvote for publishing the corrected version! Thanks!