setIdentity method

void setIdentity ()

Makes this into the identity matrix.

Implementation 

void setIdentity() {
  _m3storage[0] = 1.0;
  _m3storage[1] = 0.0;
  _m3storage[2] = 0.0;
  _m3storage[3] = 0.0;
  _m3storage[4] = 1.0;
  _m3storage[5] = 0.0;
  _m3storage[6] = 0.0;
  _m3storage[7] = 0.0;
  _m3storage[8] = 1.0;
}