mond läuft

.idea/matrixmania.iml

@@ -7,8 +7,4 @@
     <orderEntry type="jdk" jdkName="~/PycharmProjects/MatrixMania/.venv" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
-  <component name="PackageRequirementsSettings" />
-  <component name="PyDocumentationSettings" />
-  <component name="ReSTService" />
-  <component name="TestRunnerService" />
 </module>

compute.py

@@ -1,17 +1,7 @@
-"""Matrix multiplication with explicit dimension checks.
-
-This module provides a pure‑Python implementation that
-- validates input dimensions and structure
-- performs generic matrix multiplication without external libs
-- raises informative ``ValueError`` when inputs are inconsistent.
-
-The implementation is small but fully typed so it can be
-imported into other projects or used as a teaching example.
-"""
-
 from __future__ import annotations
 
 from collections.abc import Sequence
+import math
 
 Matrix = Sequence[Sequence[float]]
 
@@ -67,6 +57,23 @@ def matmul(left: Matrix, right: Matrix) -> list[list[float]]:
 
 
     # Helper to validate a matrix is non‑empty and rectangular.
+def rot_2D(theta: float) -> list[list[float]]:
+    """Return the 2‑D rotation matrix for a given angle.
+
+    Parameters
+    ----------
+    theta
+        Rotation angle in radians.
+
+    Returns
+    -------
+    list[list[float]]
+        2×2 rotation matrix ``[[cosθ, -sinθ], [sinθ, cosθ]]``.
+    """
+    c = math.cos(theta)
+    s = math.sin(theta)
+    return [[c, -s], [s, c]]
+
 def _validate(matrix: Matrix, name: str) -> None:
     """Check that *matrix* is a non‑empty, rectangular 2D sequence.
 
@@ -158,55 +165,10 @@ if __name__ == "__main__":
         matmul([[1, 2, 3]], [[1, 2]])
     except ValueError as error:
         print("example 3 passed:", error)
-else:
-    raise AssertionError("example 3 failed: no ValueError raised")
 
-if __name__ == "__main__":
-    # Example 1: standard 2x3 * 3x2 multiplication.
-    a = [
-        [1, 2, 3],
-        [4, 5, 6],
-    ]
-    b = [
-        [7, 8],
-        [9, 10],
-        [11, 12],
-    ]
-    expected = [
-        [58, 64],
-        [139, 154],
-    ]
-    assert matmul(a, b) == expected, f"example 1 failed: {matmul(a, b)}"
-    print("example 1 passed:", matmul(a, b))
 
-    # Example 2: multiplication with the identity matrix changes nothing.
+    # end of main guard
-    identity = [
-        [1, 0, 0],
-        [0, 1, 0],
-        [0, 0, 1],
-    ]
-    c = [
-        [2, -1, 0],
-        [0, 3, 4],
-        [5, 6, -2],
-    ]
-    assert matmul(c, identity) == c, "example 2 failed"
-    print("example 2 passed:", matmul(c, identity))
 
-    # Example 3: mismatched dimensions must raise ValueError.
-    try:
-        matmul([[1, 2, 3]], [[1, 2]])
-    except ValueError as error:
-        print("example 3 passed:", error)
-    else:
-        raise AssertionError("example 3 failed: no ValueError raised")
-
-    # Example 4: Demonstration of the transpose function.
-    example_matrix = [[1, 2, 3], [4, 5, 6]]
-    transposed = transpose(example_matrix)
-    print("Example 4: transpose([[1,2,3],[4,5,6]]) =", transposed)
-    assert transposed == [[1, 4], [2, 5], [3, 6]], "Example 4 failed"
-    print("example 4 passed")
 
 
 

game.py

@@ -0,0 +1,37 @@
+
+import pygame
+
+
+class Game:
+    """Basic Pygame game loop.
+
+    Subclasses **must** implement:
+    * ``update_game`` – update state, return ``False`` to quit.
+    * ``draw_game``  – render to the screen.
+    """
+
+    def __init__(self, title: str, fps: int, size: tuple[int, int]):
+        pygame.init()
+        self.screen = pygame.display.set_mode(size)
+        pygame.display.set_caption(title)
+        self.clock = pygame.time.Clock()
+        self.fps = fps
+        self.size = size
+
+    def run(self) -> None:
+        running = True
+        while running:
+            for event in pygame.event.get():
+                if event.type == pygame.QUIT:
+                    running = False
+            running = self.update_game()
+            self.draw_game()
+            pygame.display.flip()
+            self.clock.tick(self.fps)
+        pygame.quit()
+
+    def update_game(self) -> bool:
+        raise NotImplementedError
+
+    def draw_game(self) -> None:
+        raise NotImplementedError

moon.py

@@ -0,0 +1,69 @@
+"""Moon orbital simulation demo.
+
+This module defines :class:`Moon` which subclasses :class:`game.Game` and
+uses :func:`compute.rot_2D` and :func:`compute.matmul` to animate a moon
+orbiting the Earth.
+
+The original repository contained a fully functional example, but the
+``moon.py`` file was overwritten by another module during a previous
+edit.  The following implementation restores the expected behaviour.
+"""
+
+from __future__ import annotations
+
+import pygame
+
+from compute import rot_2D, matmul
+from game import Game
+
+
+EARTH_RADIUS = 30
+MOON_RADIUS = 10
+BLACK = (0, 0, 0)
+WHITE = (255, 255, 255)
+BLUE = (0, 0, 255)
+
+
+class Moon(Game):
+    """Demonstrates a moon orbiting the Earth using matrix rotation."""
+
+    def __init__(self, title: str = "Moon", fps: int = 60, size: Tuple[int, int] = (640, 400)) -> None:
+        super().__init__(title, fps, size)
+        # Earth centre – centre of the window
+        self.center: Tuple[int, int] = (size[0] // 2, size[1] // 2)
+        # Fixed orbit offset from the centre
+        self.offset: Tuple[float, float] = (100.0, 0.0)
+        # Angular speed (radians per frame)
+        self.delta_theta: float = 0.01
+        self.theta: float = 0.0
+        self.rot_moon: list[list[float]] = rot_2D(self.theta)
+
+    def update_game(self) -> bool:
+        # Advance the angle and recompute the rotation matrix
+        self.theta += self.delta_theta
+        self.rot_moon = rot_2D(self.theta)
+        # Rotate the fixed offset vector
+        point = [[self.offset[0]], [self.offset[1]]]
+        result = matmul(self.rot_moon, point)
+        # Translate back to screen coordinates
+        self.position_moon = (
+            self.center[0] + result[0][0],
+            self.center[1] + result[1][0],
+        )
+        return True
+
+    def draw_game(self) -> None:
+        self.screen.fill(BLACK)
+        pygame.draw.circle(self.screen, BLUE, self.center, EARTH_RADIUS)
+        pygame.draw.circle(
+            self.screen,
+            WHITE,
+            (int(self.position_moon[0]), int(self.position_moon[1])),
+            MOON_RADIUS,
+        )
+
+
+if __name__ == "__main__":
+    moon = Moon()
+    moon.run()
+