add orthogonal projection

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "matrixmania_brockmannti"
-version = "0.1.1"
+version = "0.1.3"
 description = "MatrixMania: Simple linear algebra functions for teaching (matmul, transpose, rot_2D)."
 authors = [
 { name="Tilo Brockmann", email="brockmannti93157@th-nuernberg.de" }

src/matrixmania/compute.py

@@ -1,6 +1,8 @@
-from typing import List
+from typing import List, Tuple
 import math
 
+import pygame
+
 
 def product(factors: List[int]) -> int:
     """
@@ -113,3 +115,7 @@ def rot_3D(angle: float, axis: str) -> List[List[float]]:
         ]
     else:
         raise ValueError("axis must be either x, y or z")
+
+
+def project_ortho(point: Tuple[float, float, float], scale: float = 1) -> Tuple[float, float]:
+    return point[0] * scale, point[1] * scale

test/test_matrixmania/test_projection.py

@@ -0,0 +1,14 @@
+import pytest
+from src.matrixmania.compute import project_ortho
+
+def test_projection():
+    point = (1.0, 2.0, 3.0)
+    expected = (1.0, 2.0)
+
+    assert project_ortho(point) == expected
+
+def test_projection_with_scale():
+    point = (1.0, 2.0, 3.0)
+    expected = (100.0, 200.0)
+
+    assert project_ortho(point, 100) == expected