Problems for 7x12 pixel display

[hatschibratschi]

hi @giladaya ,
i used your code for my little project here
https://create.arduino.cc/projecthub/hatschibratschi/flame-simulation-916431

and i found a bug

your version uses a 8x8 matrix - i used the 7x12 matrix of the arduino mkr rgb shield and i had only problems with the code after your //first row interploation...
your flame is 8 pixles wide, but i wanted a candle-like flame with only 3 pixels at the bottom getting a littel wider. that was olny possible by changing the code to this version:

  //first row interpolates with the "next" line
  for(unsigned char x = 0; x < M_HEIGHT; x++) {
      colorHSV.h = hueMask[0][x];
      colorHSV.s = 255;
      nextv = 
          (((100.0-pcnt) * f_matrix[x][0] 
        + pcnt * f_line[x])/100.0) 
        - valueMask[0][x];
      colorHSV.v = (unsigned char) max (0, nextv);
      
      HSVtoRGB(&colorRGB, &colorHSV);
      setPixel(x, 0, colorRGB.r, colorRGB.g, colorRGB.b);
  }

thank you for your very gread code and i hope you like my version as well.

greetings from vienna!