feat: point set indexing (#148)

* feat: add __getitem__ for point set

* feat: add indexing for point set

bindings/python/src/OpenSpaceToolkitMathematicsPy/Geometry/2D/Object/PointSet.cpp

@@ -49,6 +49,19 @@ inline void OpenSpaceToolkitMathematicsPy_Geometry_2D_Object_PointSet(pybind11::
             },
             keep_alive<0, 1>()
         )  // Keep vector alive while iterator is used
+        .def(
+            "__getitem__",
+            [](const PointSet& aPointSet, size_t index) -> Point
+            {
+                if (index >= aPointSet.getSize())
+                {
+                    throw std::out_of_range("Index out of range");
+                }
+                auto it = aPointSet.begin();
+                std::advance(it, index);
+                return *it;
+            }
+        )
 
         ;
 }

bindings/python/src/OpenSpaceToolkitMathematicsPy/Geometry/3D/Object/PointSet.cpp

@@ -42,6 +42,19 @@ inline void OpenSpaceToolkitMathematicsPy_Geometry_3D_Object_PointSet(pybind11::
             },
             keep_alive<0, 1>()
         )  // Keep vector alive while iterator is used
+        .def(
+            "__getitem__",
+            [](const PointSet& aPointSet, size_t index) -> Point
+            {
+                if (index >= aPointSet.getSize())
+                {
+                    throw std::out_of_range("Index out of range");
+                }
+                auto it = aPointSet.begin();
+                std::advance(it, index);
+                return *it;
+            }
+        )
 
         ;
 }

bindings/python/test/geometry/d2/object/test_point_set.py

@@ -2,8 +2,6 @@
 
 from collections.abc import Iterator, Iterable
 
-import pytest
-
 import ostk.mathematics as mathematics
 
 
@@ -93,6 +91,9 @@ def test_iter_success(self, point_set: PointSet):
         assert isinstance(iter(point_set), Iterator)
         assert isinstance(iter(point_set), Iterable)
 
+    def test_get_item_success(self, point_set: PointSet):
+        assert point_set[0] is not None
+
     # def test_is_near_success(self):
 
     # def test_get_point_closest_to_success(self):

bindings/python/test/geometry/d3/object/test_point_set.py

@@ -104,6 +104,9 @@ def test_iter_success(self, point_set: PointSet):
         assert isinstance(iter(point_set), Iterator)
         assert isinstance(iter(point_set), Iterable)
 
+    def test_get_item_success(self, point_set: PointSet):
+        assert point_set[0] is not None
+
     # def test_is_near_success(self):
 
     # def test_get_point_closest_to_success(self):