pybricks.tools: Document cross product.

doc/main/tools/index.rst

@@ -31,3 +31,5 @@
 .. pybricks-requirements:: stm32-float
 
 .. autofunction:: pybricks.tools.vector
+
+.. autofunction:: pybricks.tools.cross

jedi/tests/test_complete_import.py

@@ -155,6 +155,7 @@ def test_from_pybricks_tools_import():
     code = "from pybricks.tools import "
     completions: list[CompletionItem] = json.loads(complete(code, 1, len(code) + 1))
     assert [c["insertText"] for c in completions] == [
+        "cross",
         "DataLog",
         "Matrix",
         "StopWatch",

src/pybricks/tools.py

@@ -207,6 +207,21 @@ def vector(*args):
     """
 
 
+def cross(a: Matrix, b: Matrix) -> Matrix:
+    """
+    cross(a, b) -> Matrix
+
+    Gets the cross product ``a`` × ``b`` of two vectors.
+
+    Arguments:
+        a (Matrix): A three-dimensional vector.
+        b (Matrix): A three-dimensional vector.
+
+    Returns:
+        The cross product, also a three-dimensional vector.
+    """
+
+
 # HACK: hide from jedi
 if TYPE_CHECKING:
     del Number