set method
Implementation
Matrix3 set(double n11, double n12, double n13, double n21, double n22,
double n23, double n31, double n32, double n33) {
var te = elements;
te[0] = n11;
te[1] = n21;
te[2] = n31;
te[3] = n12;
te[4] = n22;
te[5] = n32;
te[6] = n13;
te[7] = n23;
te[8] = n33;
return this;
}