Use ScalarT not double

src/point_set.cpp

@@ -82,7 +82,7 @@ void PointSet::computeRadius()
     radius_ = sqrt(dd2max);
 }
 
-void PointSet::computeBoundingBox(const double & _clearance)
+void PointSet::computeBoundingBox(const ScalarT & _clearance)
 {
     double cxx, cyy, cxy; //variance and covariance terms
     Eigen::MatrixXd points_o, points_c; //points wrt origin, points wrt cov eigen vectors