diff --git a/.appveyor.yml b/.appveyor.yml
index 458aad5..20cfcaf 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -21,7 +21,7 @@ build_script:
 - ps: |
     python -m build -s
     cd dist
-    python -m pip install --verbose pybind11_rdp-0.0.2.tar.gz
+    python -m pip install --verbose pybind11_rdp-0.1.0.tar.gz
     cd ..
 test_script:
 - ps: python -m pytest
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 8228b31..cdf965d 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -46,6 +46,8 @@ jobs:
     - uses: pypa/cibuildwheel@v2.11.1
       env:
         CIBW_ARCHS_MACOS: auto universal2
+        # https://cibuildwheel.readthedocs.io/en/stable/options/#build-skip
+        CIBW_SKIP: pp*
 
     - name: Verify clean directory
       run: git diff --exit-code
diff --git a/conda.recipe/meta.yaml b/conda.recipe/meta.yaml
index af72c30..dfe8039 100644
--- a/conda.recipe/meta.yaml
+++ b/conda.recipe/meta.yaml
@@ -1,6 +1,6 @@
 package:
   name: pybind11_rdp
-  version: 0.0.2
+  version: 0.1.0
 
 source:
   path: ..
diff --git a/docs/conf.py b/docs/conf.py
index a795652..2b44989 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -60,9 +60,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '0.0.2'
+version = '0.1.0'
 # The full version, including alpha/beta/rc tags.
-release = '0.0.2'
+release = '0.1.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/setup.py b/setup.py
index ab15638..260cf0a 100644
--- a/setup.py
+++ b/setup.py
@@ -122,7 +122,7 @@ def build_extension(self, ext):
 # logic and declaration, and simpler if you include description/version in a file.
 setup(
     name="pybind11_rdp",
-    version="0.0.2",
+    version="0.1.0",
     author="tzx",
     author_email="dvorak4tzx@gmail.com",
     url="https://github.com/cubao/pybind11-rdp",
diff --git a/src/main.cpp b/src/main.cpp
index 83c7e93..8d543c2 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -135,6 +135,14 @@ PYBIND11_MODULE(pybind11_rdp, m)
            rdp_mask
     )pbdoc";
 
+    py::class_<LineSegment>(m, "LineSegment") //
+        .def(py::init<const Eigen::Vector3d, const Eigen::Vector3d>(), "A"_a,
+             "B"_a)
+        .def("distance", &LineSegment::distance, "P"_a)
+        .def("distance2", &LineSegment::distance2, "P"_a)
+        //
+        ;
+
     auto rdp_doc = R"pbdoc(
         Simplifies a given array of points using the Ramer-Douglas-Peucker algorithm.
 
diff --git a/test.py b/test.py
index 9d7b583..05c6045 100644
--- a/test.py
+++ b/test.py
@@ -1,10 +1,20 @@
 import time
 
 import numpy as np
+from pybind11_rdp import LineSegment
 from pybind11_rdp import rdp as rdp_pybind
 from pybind11_rdp import rdp_mask as rdp_mask
 from rdp import rdp as rdp_python
 
+seg = LineSegment([0, 0, 0], [10, 0, 0])
+assert 4.0 == seg.distance([5.0, 4.0, 0.0])
+assert 5.0 == seg.distance([-4.0, 3.0, 0.0])
+assert 5.0 == seg.distance([14.0, 3.0, 0.0])
+seg = LineSegment([0, 0, 0], [0, 0, 0])
+assert 5.0 == seg.distance([3.0, 4.0, 0.0])
+assert 5.0 == seg.distance([-4.0, 3.0, 0.0])
+assert 13.0 == seg.distance([5.0, 12.0, 0.0])
+
 for fn in [rdp_python, rdp_pybind]:
     print("#" * 80)
     print(fn)
diff --git a/tests/test_basic.py b/tests/test_basic.py
index d0aabcd..4d88753 100644
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -1,5 +1,18 @@
-import pybind11_rdp as m
+from pybind11_rdp import LineSegment, rdp
 
 
-def test_main():
-    assert m.rdp([[1, 1], [2, 2], [3, 3], [4, 4]]).shape == (2, 2)
+def test_segment():
+    seg = LineSegment([0, 0, 0], [10, 0, 0])
+    assert 4.0 == seg.distance([5.0, 4.0, 0.0])
+    assert 5.0 == seg.distance([-4.0, 3.0, 0.0])
+    assert 5.0 == seg.distance([14.0, 3.0, 0.0])
+    seg = LineSegment([0, 0, 0], [0, 0, 0])
+    assert 5.0 == seg.distance([3.0, 4.0, 0.0])
+    assert 5.0 == seg.distance([-4.0, 3.0, 0.0])
+    assert 13.0 == seg.distance([5.0, 12.0, 0.0])
+
+
+def test_rdp():
+    assert rdp([[1, 1], [2, 2], [3, 3], [4, 4]], epsilon=1e-9).shape == (2, 2)
+    assert rdp([[0, 0], [5, 1 + 1e-3], [10, 0]], epsilon=1).shape == (3, 2)
+    assert rdp([[0, 0], [5, 1 - 1e-3], [10, 0]], epsilon=1).shape == (2, 2)