.

.gitignore

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+# ---> Python
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# UV
+#   Similar to Pipfile.lock, it is generally recommended to include uv.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#uv.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/latest/usage/project/#working-with-version-control
+.pdm.toml
+.pdm-python
+.pdm-build/
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+# Ruff stuff:
+.ruff_cache/
+
+# PyPI configuration file
+.pypirc

LICENSE

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+MIT License
+
+Copyright (c) 2026 henri.vielhaben
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+associated documentation files (the "Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
+following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial
+portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
+LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
+EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# orientada-a-objectos

aufgaben_mit_schreiben/aufgabe3.md

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+```mermaid
+classDiagram
+    Item
+    Item : count: int
+    Item : type: int
+    Item : inc(self, amount)
+
+    Kart
+    Kart : int speed_max
+    Kart : Vector2 vel
+    Kart : Vector2 pos
+    Kart : string color
+    Kart : ram(self, Kart other)
+    Kart : consume_item(self, Item item)
+```
+
+Die Methode `inc(amount)` in `Item` ändert `.count` um `amount`.
+Die Methode `ram(other)` in `Kart` tauscht die beiden Geschwindigkeiten.

aufgaben_mit_schreiben/kart.mermaid

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+classDiagram
+    Item
+    Item : int count
+    Item : int type
+    Item : inc(self, amount)
+
+    Kart
+    Kart : int speed_max
+    Kart : string color
+    Kart : ram(self, Kart other)
+    Kart : consume_item(self, Item item)

input.py

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+import pygame
+
+class Input:
+    def __init__(self):
+        self.left: bool = False
+        self.right: bool = True
+        self.down: bool = False
+        self.up: bool = False
+        self.close: bool = False
+
+    def poll(self) -> None:
+        events = pygame.event.get()
+        for event in events:
+            if event.type == pygame.QUIT:
+                self.close = True
+            if event.type == pygame.KEYDOWN:
+                if event.key == pygame.K_LEFT:
+                    self.left = True
+                if event.key == pygame.K_RIGHT:
+                    self.right = True
+                if event.key == pygame.K_UP:
+                    self.up = True
+                if event.key == pygame.K_DOWN:
+                    self.down = True
+            if event.type == pygame.KEYUP:
+                if event.key == pygame.K_LEFT:
+                    self.left = True
+                if event.key == pygame.K_RIGHT:
+                    self.right = True
+                if event.key == pygame.K_UP:
+                    self.up = True
+                if event.key == pygame.K_DOWN:
+                    self.down = True
+
+    def horizontal(self) -> float:
+        return self.right - self.left
+
+    def vertical(self) -> float:
+        return self.down - self.up

items.py

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+ITEM_MUSHROOM = 0
+ITEM_BANANA = 1
+
+
+class Item:
+    def __init__(self):
+        self.kind = 0
+        self.count = 0
+
+    def inc(self, value):
+        self.count += value

kart.py

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+from typing import Self, override
+
+import items
+import pygame
+from input import Input
+from items import Item
+from pygame.math import clamp
+
+Vec2 = pygame.Vector2
+
+class Kart:
+    def __init__(self, name: str, pos: Vec2, vel: Vec2, dir: float, speed_max: float):
+        self.name: str = name
+        self.pos: Vec2 = pos
+        self.vel: Vec2 = vel
+        self.dir: float = dir
+        self.speed_max: float = speed_max
+
+    @override
+    def __str__(self) -> str:
+        return f"Kart {{ name: {self.name}, pos: {self.pos}, vel: {self.vel}, dir: {self.dir}, speed_max: {self.speed_max}}}"
+
+    def tick(self, input: Input):
+        input_x = input.horizontal()
+        input_y = input.vertical()
+        assert abs(input_x) < 1
+        assert abs(input_y) < 1
+
+        acc_amount = input_y * 2
+        self.vel += Vec2(acc_amount, 0).rotate(self.dir)
+        steer = input_x * 2
+        self.dir += steer
+
+        self.vel.clamp_magnitude_ip(self.speed_max)
+        self.pos += self.vel
+
+    def ram(self, other: Self):
+        """
+        swap the two kart's velocities (not physically accurate)
+        """
+        temp = self.vel
+        self.vel = other.vel
+        other.vel = temp
+
+    def consume_item(self, item: Item):
+        if item.kind == items.ITEM_BANANA:
+            self.speed_max += 1
+        elif item.kind == items.ITEM_BANANA:
+            self.speed_max -= 1
+
+        self.speed_max = clamp(self.speed_max, 0, 100)

main.py

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+import pygame
+
+from kart import Kart
+
+Vec2 = pygame.Vector2
+
+player = Kart(
+    name = "epsilon",
+    pos = Vec2(0, 0),
+    vel = Vec2(2, 0),
+    dir = 0,
+    speed_max = 10,
+)