1 files changed, 7 insertions, 2 deletions
diff --git a/extern/libmv/third_party/ceres/internal/ceres/block_random_access_diagonal_matrix.h b/extern/libmv/third_party/ceres/internal/ceres/block_random_access_diagonal_matrix.h
index 6b3cff2338f..ea9967817db 100644
--- a/extern/libmv/third_party/ceres/internal/ceres/block_random_access_diagonal_matrix.h
+++ b/extern/libmv/third_party/ceres/internal/ceres/block_random_access_diagonal_matrix.h
@@ -52,7 +52,7 @@ namespace internal {
 class BlockRandomAccessDiagonalMatrix : public BlockRandomAccessMatrix {
  public:
   // blocks is an array of block sizes.
-  BlockRandomAccessDiagonalMatrix(const vector<int>& blocks);
+  explicit BlockRandomAccessDiagonalMatrix(const vector<int>& blocks);
 
   // The destructor is not thread safe. It assumes that no one is
   // modifying any cells when the matrix is being destroyed.
@@ -70,11 +70,16 @@ class BlockRandomAccessDiagonalMatrix : public BlockRandomAccessMatrix {
   // locked.
   virtual void SetZero();
 
+  // Invert the matrix assuming that each block is positive definite.
+  void Invert();
+
+  // y += S * x
+  void RightMultiply(const double* x, double* y) const;
+
   // Since the matrix is square, num_rows() == num_cols().
   virtual int num_rows() const { return tsm_->num_rows(); }
   virtual int num_cols() const { return tsm_->num_cols(); }
 
-  // Access to the underlying matrix object.
   const TripletSparseMatrix* matrix() const { return tsm_.get(); }
   TripletSparseMatrix* mutable_matrix() { return tsm_.get(); }