👷 Change GitHub action image and fix build issue

.github/workflows/build-deploy.yml

@@ -6,14 +6,14 @@ on:
 
 jobs:
   build-and-deploy:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
 
-    - name: Set up Python 3.6
+    - name: Set up Python 3.11
       uses: actions/setup-python@v1
       with:
-        python-version: 3.6
+        python-version: 3.11
 
     - name: Install dependencies (1/3) (GCC, CMake, Eigen3, Doxygen, Graphviz)
       run: |
@@ -50,4 +50,4 @@ jobs:
       uses: peaceiris/[email protected]
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
-        publish_dir: ./build/docs/html
+        publish_dir: ./build/docs/html

.github/workflows/build-only.yml

@@ -6,14 +6,14 @@ on:
 
 jobs:
   build-kcp:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
 
-    - name: Set up Python 3.6
+    - name: Set up Python 3.11
       uses: actions/setup-python@v1
       with:
-        python-version: 3.6
+        python-version: 3.11
 
     - name: Install dependencies (1/3) (GCC, CMake, Eigen3, Doxygen, Graphviz)
       run: |
@@ -43,4 +43,4 @@ jobs:
       run: |
         mkdir build && cd build
         cmake .. -DKCP_BUILD_PYTHON_BINDING=ON -DPYTHON_EXECUTABLE=$(which python3) -DKCP_BUILD_DOC=ON
-        make
+        make

kcp/src/utility.cpp

@@ -42,7 +42,7 @@ get_kcp_correspondences(const Eigen::MatrixX3d& src,
     // Build the KD-tree of dst_feature, and query k closest points for each
     // source point.
     nanoflann::KDTreeEigenMatrixAdaptor<Eigen::MatrixXd> dst_tree(dim, std::cref(dst_feature), 10);
-    dst_tree.index->buildIndex();
+    dst_tree.index_->buildIndex();
 
     std::vector<double> point(dim);
     std::vector<size_t> indices(k);
@@ -56,7 +56,7 @@ get_kcp_correspondences(const Eigen::MatrixX3d& src,
       }
       result.init(&indices[0], &distances[0]);
 
-      dst_tree.index->findNeighbors(result, &point[0], nanoflann::SearchParams());
+      dst_tree.index_->findNeighbors(result, &point[0], nanoflann::SearchParameters());
 
       for (int i = 0; i < size; ++i) {
         int dst_index = indices[i];
@@ -72,4 +72,4 @@ get_kcp_correspondences(const Eigen::MatrixX3d& src,
   return correspondences;
 }
 
-};  // namespace kcp
+};  // namespace kcp