setUpper2x2 method
Sets the upper 2x2 of the matrix to be arg
.
Implementation
void setUpper2x2(Matrix2 arg) {
final argStorage = arg._m2storage;
_m3storage[0] = argStorage[0];
_m3storage[1] = argStorage[1];
_m3storage[3] = argStorage[2];
_m3storage[4] = argStorage[3];
}