String leftMatrix = "l";
String rightMatrix = "r";

/// Print the calculation which multiplies two 4x4 matrices.
///
/// The matrices store their elements in a flat array in column order.
void main() {
  for (int c in new Iterable.generate(4)) {
    for (int r in new Iterable.generate(4)) {
      print("l[${0 + r}]*r[${c * 4 + 0}] + l[${4 + r}]*r[${c * 4 + 1}] + "
          "l[${8 + r}]*r[${c * 4 + 2}] + l[${12 + r}]*r[${c * 4 + 3}],");
    }
  }
}

/*
l[0]*r[0] + l[4]*r[1] + l[8]*r[2] + l[12]*r[3],
l[1]*r[0] + l[5]*r[1] + l[9]*r[2] + l[13]*r[3],
l[2]*r[0] + l[6]*r[1] + l[10]*r[2] + l[14]*r[3],
l[3]*r[0] + l[7]*r[1] + l[11]*r[2] + l[15]*r[3],
l[0]*r[4] + l[4]*r[5] + l[8]*r[6] + l[12]*r[7],
l[1]*r[4] + l[5]*r[5] + l[9]*r[6] + l[13]*r[7],
l[2]*r[4] + l[6]*r[5] + l[10]*r[6] + l[14]*r[7],
l[3]*r[4] + l[7]*r[5] + l[11]*r[6] + l[15]*r[7],
l[0]*r[8] + l[4]*r[9] + l[8]*r[10] + l[12]*r[11],
l[1]*r[8] + l[5]*r[9] + l[9]*r[10] + l[13]*r[11],
l[2]*r[8] + l[6]*r[9] + l[10]*r[10] + l[14]*r[11],
l[3]*r[8] + l[7]*r[9] + l[11]*r[10] + l[15]*r[11],
l[0]*r[12] + l[4]*r[13] + l[8]*r[14] + l[12]*r[15],
l[1]*r[12] + l[5]*r[13] + l[9]*r[14] + l[13]*r[15],
l[2]*r[12] + l[6]*r[13] + l[10]*r[14] + l[14]*r[15],
l[3]*r[12] + l[7]*r[13] + l[11]*r[14] + l[15]*r[15],
*/