code: public Matrix3d set(double m[]) {
          m00 = m[0];
          m01 = m[1];
          m02 = m[2];
          m10 = m[3];
          m11 = m[4];
          m12 = m[5];
          m20 = m[6];
          m21 = m[7];
          m22 = m[8];
          return this;
      }
docs: Set the values in this matrix based on the supplied double array. The result looks like this:
  <p>
  0, 3, 6<br>
  1, 4, 7<br>
  2, 5, 8<br>
  <p>
  Only uses the first 9 values, all others are ignored.
  
  @param m
  the array to read the matrix values from
  @return this