From 043440e38c891c0a1cc7271f58e9e44f1eca7211 Mon Sep 17 00:00:00 2001
From: Tia Lechner <lechner.tia@gmail.com>
Date: Tue, 20 Oct 2026 17:10:07 +0200
Subject: [PATCH] fourth commit: test_rot added

---
 src/matrixmania/compute.py        | 52 +++++++++++++++++++++++++++++++
 test/test_matrixmania/__init__.py |  1 +
 test/test_matrixmania/test_rot.py |  9 ++++++
 3 files changed, 62 insertions(+)
 create mode 100644 test/test_matrixmania/__init__.py
 create mode 100644 test/test_matrixmania/test_rot.py

diff --git a/src/matrixmania/compute.py b/src/matrixmania/compute.py
index 1dfa002..55d9c96 100644
--- a/src/matrixmania/compute.py
+++ b/src/matrixmania/compute.py
@@ -91,6 +91,58 @@ def rot_2D(theta: float) -> list[list[float]]:
     ]
 
 
+def rot_3D(angle: float, axis: str) -> list[list[float]]:
+    """Return a 3‑D rotation matrix.
+
+    The function converts *angle* from degrees to radians and builds the
+    standard rotation matrix around the requested *axis*.
+
+    Args:
+       angle: Rotationswinkel in Grad.
+        axis: ``"x"``, ``"y"`` oder ``"z"`` – der Drehachse.
+
+    Returns:
+        3x3 Rotationsmatrix als verschachtelte Listen.
+
+    Raises:
+        ValueError: Wenn *axis* keinen gültigen Wert hat.
+   """
+    # Validate axis
+    axis_lower = axis.lower()
+    if axis_lower not in {"x", "y", "z"}:
+        raise ValueError(
+            f"Unbekannte Achse '{axis}'. Erwartet: 'x', 'y' oder 'z'."
+        )
+
+    # Convert degrees to radians for math functions
+    rad = math.radians(angle)
+    c = math.cos(rad)
+    s = math.sin(rad)
+
+    if axis_lower == "x":
+        return [
+            [1, 0, 0],
+            [0, c, -s],
+            [0, s, c],
+        ]
+    if axis_lower == "y":
+        return [
+            [c, 0, s],
+            [0, 1, 0],
+            [
+                -s,
+                0,
+                c,
+            ],
+        ]
+    # z
+    return [
+        [c, -s, 0],
+        [s, c, 0],
+        [0, 0, 1],
+    ]
+
+
 if __name__ == "__main__":
 
  #matmul prüfung
diff --git a/test/test_matrixmania/__init__.py b/test/test_matrixmania/__init__.py
new file mode 100644
index 0000000..2eeb846
--- /dev/null
+++ b/test/test_matrixmania/__init__.py
@@ -0,0 +1 @@
+from compute import matmul, transpose, rot_2D
\ No newline at end of file
diff --git a/test/test_matrixmania/test_rot.py b/test/test_matrixmania/test_rot.py
new file mode 100644
index 0000000..26f6a69
--- /dev/null
+++ b/test/test_matrixmania/test_rot.py
@@ -0,0 +1,9 @@
+
+def test_matrixmania():
+    #Arrange
+
+
+    #Act
+
+
+    #Assert
\ No newline at end of file