Method tilt

src/model/PlanarSurface.cpp:244–252

    }

    double PlanarSurface_Impl::tilt() const {
      OptionalVector3d on = outwardNormal();
      if (!on) {
        LOG_AND_THROW("Cannot calculate PlanarSurface tilt because there is no outwardNormal.");
      }
      Vector3d n = *on;
      Vector3d up(0.0, 0.0, 1.0);
      return getAngle(n, up);
    }

    double PlanarSurface_Impl::azimuth() const {
      OptionalVector3d on = outwardNormal();