From e1c9a948f09a15d675db7088c9f2118a30d991eb Mon Sep 17 00:00:00 2001
From: Tetsuo Koyama <tkoyama010@gmail.com>
Date: Fri, 26 Jul 2024 08:49:50 +0900
Subject: [PATCH 1/3] Update

---
 examples/__init__.py   |  1 +
 examples/delaunay.py   | 13 +++++++++++++
 pyproject.toml         |  6 ++++--
 src/skgmsh/__init__.py | 32 ++++++++++++++++++++++++++++++++
 4 files changed, 50 insertions(+), 2 deletions(-)
 create mode 100644 examples/__init__.py
 create mode 100644 examples/delaunay.py

diff --git a/examples/__init__.py b/examples/__init__.py
new file mode 100644
index 00000000..627c7a31
--- /dev/null
+++ b/examples/__init__.py
@@ -0,0 +1 @@
+"""Example of a package skgmsh file."""
diff --git a/examples/delaunay.py b/examples/delaunay.py
new file mode 100644
index 00000000..2efdb615
--- /dev/null
+++ b/examples/delaunay.py
@@ -0,0 +1,13 @@
+"""Example of Delaunay triangulation in 2D."""
+
+import matplotlib.pyplot as plt
+import numpy as np
+from scipy.spatial import Delaunay
+
+points = np.array([[0, 0], [0, 1.1], [1, 0], [1, 1]])
+
+tri = Delaunay(points)
+
+plt.triplot(points[:, 0], points[:, 1], tri.simplices)
+plt.plot(points[:, 0], points[:, 1], "o")
+plt.show()
diff --git a/pyproject.toml b/pyproject.toml
index 8756fa56..4e456944 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,8 @@ requires = [
   'pygmsh<7.1.18',
   'pyvista',
   'scooby<0.9.3',
-  'setuptools<69.0.4'
+  'setuptools<69.0.4',
+  'scipy<1.14.1'
 ]
 build-backend = 'setuptools.build_meta'
 
@@ -20,7 +21,8 @@ dependencies = [
   'meshio<5.3.6',
   'pygmsh<7.1.18',
   'pyvista',
-  'scooby<0.9.3'
+  'scooby<0.9.3',
+  'scipy<1.14.1'
 ]
 requires-python = '>=3.9'
 
diff --git a/src/skgmsh/__init__.py b/src/skgmsh/__init__.py
index 96cc0f0d..75aaa522 100644
--- a/src/skgmsh/__init__.py
+++ b/src/skgmsh/__init__.py
@@ -13,6 +13,8 @@
 if TYPE_CHECKING:
     from collections.abc import Sequence
 
+    import numpy as np
+
 INITIAL_MESH_ONLY_2D = 3
 FRONTAL_DELAUNAY_2D = 6
 DELAUNAY_3D = 1
@@ -258,3 +260,33 @@ def frontal_delaunay_2d(
             ind.append(index)
 
     return mesh.remove_cells(ind)
+
+
+class FrontalDelaunay2D:
+    """
+    Frontal Delaunay 2D mesh algorithm.
+
+    Parameters
+    ----------
+    points : np.ndarray
+        Coordinates of the points to triangulate.
+
+    """
+
+    # TODO @tkoyama010: Need to consider how to handle gmsh with two or more instances. # noqa: FIX002, TD003
+
+    def __init__(self: FrontalDelaunay2D, points: np.ndarray) -> None:  # noqa: ARG002
+        """Initialize the FrontalDelaunay2D class."""
+        gmsh.initialize()
+        gmsh.option.set_number("Mesh.Algorithm", FRONTAL_DELAUNAY_2D)
+        gmsh.option.set_number("General.Verbosity", SILENT)
+
+    def __del__(self: FrontalDelaunay2D) -> None:
+        """Finalize the FrontalDelaunay2D class."""
+        gmsh.clear()
+        gmsh.finalize()
+
+    def enable_recombine(self: FrontalDelaunay2D) -> None:
+        """Enable recombine the generated mesh into quadrangles."""
+        # TODO @tkoyama010: Define ID of surface clearly. # noqa: FIX002, TD003
+        gmsh.model.mesh.setRecombine(2, 1)

From 8643b9383dad616b6a3af8d8b1f9c709e05a6c51 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Fri, 9 Aug 2024 07:20:59 +0000
Subject: [PATCH 2/3] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 src/skgmsh/__init__.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/skgmsh/__init__.py b/src/skgmsh/__init__.py
index c6bd2f3f..1eba2c8d 100644
--- a/src/skgmsh/__init__.py
+++ b/src/skgmsh/__init__.py
@@ -300,6 +300,7 @@ def mesh(self: Delaunay2D) -> pv.UnstructuredGrid:
         """Get the mesh."""
         return self._mesh
 
+
 class FrontalDelaunay2D:
     """
     Frontal Delaunay 2D mesh algorithm.

From af94543d1dc4d5998dd859c4ef077aca577dac14 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Sun, 11 Aug 2024 11:19:45 +0000
Subject: [PATCH 3/3] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 examples/delaunay.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/examples/delaunay.py b/examples/delaunay.py
index 2efdb615..afb67d86 100644
--- a/examples/delaunay.py
+++ b/examples/delaunay.py
@@ -1,5 +1,7 @@
 """Example of Delaunay triangulation in 2D."""
 
+from __future__ import annotations
+
 import matplotlib.pyplot as plt
 import numpy as np
 from scipy.spatial import Delaunay