sixth commit: test added

.idea/inspectionProfiles/profiles_settings.xml

@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>

.idea/matrixmania.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/.venv" />
+    </content>
+    <orderEntry type="jdk" jdkName="Python 3.13 (matrixmania)" jdkType="Python SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/misc.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Black">
+    <option name="sdkName" value="Python 3.13 (matrixmania)" />
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.13 (matrixmania)" project-jdk-type="Python SDK" />
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/matrixmania.iml" filepath="$PROJECT_DIR$/.idea/matrixmania.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

AGENTS.md

@@ -1,4 +1,7 @@
 # Regeln für dieses Projekt
 - Code nach PEP 8, Zeilenlänge maximal 88 Zeichen.
 - Jede Funktion und Methode hat einen Docstring und Type Hints.
-- Vor jedem Commit: `ruff check` und `ruff format`.
+- Vor jedem Commit: `ruff check` und `ruff format`.
+- ## Projektstruktur
+- Quellcode liegt unter "src/matrixmania/", Tests unter "test/test_matrixmania/"
+- Testpakete, Testdateien und Testfunktionen beginnen mit "test_"

install_dependencies.py

@@ -0,0 +1,146 @@
+#!/usr/bin/env python3
+"""Installiert die Abhängigkeiten aus pyproject.toml in die aktuelle Python-Umgebung.
+
+Ersatz für "Install requirements" aus PyCharm, wenn das Projekt eine pyproject.toml
+statt einer requirements.txt hat. Kein Build, keine besondere Projektstruktur nötig,
+nur Standardbibliothek (Python >= 3.11).
+
+Benutzung:
+  In PyCharm: Rechtsklick auf diese Datei -> Run 'install_dependencies'
+  Im Terminal (venv aktiv): python install_dependencies.py
+
+Ohne Parameter wird ALLES installiert:
+  [project].dependencies + alle [project.optional-dependencies] + alle [dependency-groups]
+
+Abweichendes Verhalten:
+  python install_dependencies.py --extra dev        nur Basis + Extra "dev"
+  python install_dependencies.py --group test       nur Basis + Gruppe "test"
+  python install_dependencies.py --no-main --group dev
+  python install_dependencies.py --list             nur anzeigen, nichts installieren
+  python install_dependencies.py --write            requirements.txt schreiben statt installieren
+  python install_dependencies.py --write -o reqs.txt
+"""
+from __future__ import annotations
+
+import sys
+
+if sys.version_info < (3, 11):
+    sys.exit("Dieses Skript braucht Python 3.11 oder neuer (tomllib). "
+             f"Aktuell: {sys.version.split()[0]}")
+
+import argparse
+import subprocess
+import tempfile
+import tomllib
+from pathlib import Path
+
+PROJECT_DIR = Path(__file__).resolve().parent
+
+
+def resolve_group(groups: dict, name: str, seen: set[str] | None = None) -> list[str]:
+    """Löst eine Dependency-Group inkl. {include-group = "..."} rekursiv auf."""
+    seen = set() if seen is None else seen
+    if name in seen:
+        raise ValueError(f"Zyklische include-group: {name}")
+    if name not in groups:
+        raise KeyError(f"Dependency-Group '{name}' nicht gefunden")
+    seen.add(name)
+    result: list[str] = []
+    for entry in groups[name]:
+        if isinstance(entry, str):
+            result.append(entry)
+        elif isinstance(entry, dict) and "include-group" in entry:
+            result.extend(resolve_group(groups, entry["include-group"], seen))
+    return result
+
+
+def collect(data: dict, extras: list[str], groups: list[str], no_main: bool) -> list[str]:
+    project = data.get("project", {})
+    optional = project.get("optional-dependencies", {})
+    dep_groups = data.get("dependency-groups", {})
+    deps: list[str] = []
+
+    if not no_main:
+        deps.extend(project.get("dependencies", []))
+    for extra in extras:
+        if extra not in optional:
+            raise KeyError(f"Optional-Dependency '{extra}' nicht gefunden")
+        deps.extend(optional[extra])
+    for group in groups:
+        deps.extend(resolve_group(dep_groups, group))
+
+    # Duplikate entfernen, Reihenfolge behalten
+    return list(dict.fromkeys(d.strip() for d in deps if d.strip()))
+
+
+def main() -> int:
+    p = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
+    p.add_argument("-p", "--pyproject", type=Path, default=PROJECT_DIR / "pyproject.toml",
+                   help="Pfad zur pyproject.toml (Standard: neben diesem Skript)")
+    p.add_argument("--extra", action="append", default=None,
+                   help="nur diese optional-dependencies (mehrfach möglich)")
+    p.add_argument("--group", action="append", default=None,
+                   help="nur diese dependency-groups (mehrfach möglich)")
+    p.add_argument("--no-main", action="store_true", help="[project].dependencies weglassen")
+    p.add_argument("--list", action="store_true", help="Abhängigkeiten nur anzeigen")
+    p.add_argument("--write", action="store_true", help="requirements-Datei schreiben statt installieren")
+    p.add_argument("-o", "--output", type=Path, default=PROJECT_DIR / "requirements.txt",
+                   help="Zieldatei für --write")
+    args = p.parse_args()
+
+    if not args.pyproject.exists():
+        print(f"{args.pyproject} nicht gefunden", file=sys.stderr)
+        return 1
+    data = tomllib.loads(args.pyproject.read_text(encoding="utf-8"))
+    all_extras = list(data.get("project", {}).get("optional-dependencies", {}))
+    all_groups = list(data.get("dependency-groups", {}))
+
+    # Ohne --extra/--group: alles. Mit einem davon: nur das Gewählte.
+    selective = args.extra is not None or args.group is not None
+    extras = (args.extra or []) if selective else all_extras
+    groups = (args.group or []) if selective else all_groups
+
+    try:
+        deps = collect(data, extras, groups, args.no_main)
+    except (KeyError, ValueError) as e:
+        print(f"Fehler: {e.args[0]}", file=sys.stderr)
+        print(f"  Vorhandene --extra: {', '.join(all_extras) or '(keine)'}", file=sys.stderr)
+        print(f"  Vorhandene --group: {', '.join(all_groups) or '(keine)'}", file=sys.stderr)
+        return 1
+
+    parts = ([] if args.no_main else ["Basis"]) + [f"extra:{e}" for e in extras] + [f"group:{g}" for g in groups]
+    print(f"Auswahl: {', '.join(parts) or '(nichts)'}")
+
+    if args.list:
+        print("\n".join(deps) or "(keine Abhängigkeiten)")
+        return 0
+
+    content = f"# Automatisch erzeugt aus {args.pyproject.name} – nicht von Hand bearbeiten\n" + "\n".join(deps) + "\n"
+
+    if args.write:
+        args.output.write_text(content, encoding="utf-8")
+        print(f"{len(deps)} Abhängigkeiten -> {args.output}")
+        return 0
+
+    if not deps:
+        print("Keine Abhängigkeiten gefunden – nichts zu tun.")
+        return 0
+
+    if sys.prefix == sys.base_prefix:
+        print("WARNUNG: Es ist kein virtuelles Environment aktiv – es wird in die globale "
+              f"Python-Installation installiert:\n  {sys.prefix}", file=sys.stderr)
+        if sys.stdin.isatty() and input("Trotzdem fortfahren? [j/N] ").strip().lower() not in ("j", "ja", "y", "yes"):
+            return 1
+
+    with tempfile.NamedTemporaryFile("w", suffix=".txt", delete=False, encoding="utf-8") as tmp:
+        tmp.write(content)
+        tmp_path = Path(tmp.name)
+    try:
+        print(f"Installiere {len(deps)} Abhängigkeiten in {sys.prefix}\n")
+        return subprocess.call([sys.executable, "-m", "pip", "install", "-r", str(tmp_path)])
+    finally:
+        tmp_path.unlink(missing_ok=True)
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

pyproject.toml

@@ -1,3 +1,7 @@
 [project]
 name = "matrixmania"
-version = "0.1.0"
+version = "0.1.0"
+[project.optional-dependencies]
+dev = ["pytest", "ruff", "pytest-cov"]
+[tool.pytest.ini_options]
+pythonpath = "src"

src/matrixmania/__init__.py

@@ -0,0 +1 @@
+from .compute import matmul, transpose, rot_2D, rot_3D, project_ortho, project_perspective

src/matrixmania/compute.py

@@ -91,6 +91,78 @@ 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],
+    ]
+
+def project_ortho(point: tuple[float, float, float], scale: float = 1) -> tuple[float, float]:
+    """Project a 3D point onto a 2D plane using orthogonal projection."""
+    x, y, _z = point
+    return (x * scale, y * scale)
+
+
+def project_perspective(point: tuple[float, float, float],
+                            focal_length: float = 1.0,
+                            scale: float = 1.0,
+                            camera_distance: float = 4.0) -> tuple[float, float]:
+    """Project a 3D point onto a 2D plane using perspective projection."""
+    x, y ,z = point
+    factor = focal_length / (z+camera_distance)
+    x_2d = x * factor * scale
+    y_2d = y * factor * scale
+    return (x_2d, y_2d)
+
+
+
+
+
 if __name__ == "__main__":
 
  #matmul prüfung

test/test_matrixmania/test_project_perspective.py

@@ -0,0 +1,48 @@
+import math
+import pytest
+
+from matrixmania import project_perspective
+
+
+def approx_equal(a: float, b: float, rel_tol: float = 1e-9) -> bool:
+    """Utility to compare two floats with a relative tolerance."""
+    return math.isclose(a, b, rel_tol=rel_tol)
+
+
+@pytest.mark.parametrize(
+    "point,focal_length,scale,expected",
+    [
+        # Case 1 – no scaling, unit focal length
+        (
+            (1.0, 2.0, 3.0),
+            1.0,  # focal_length
+            1.0,  # scale
+            (
+                1.0 / (4.0 + 3.0),  # x projected
+                2.0 / (4.0 + 3.0),  # y projected
+            ),
+        ),
+        # Case 2 – scale 100, focal length 2
+        (
+            (1.0, 2.0, 3.0),
+            2.0,  # focal_length
+            100.0,  # scale
+            (
+                2.0 * 100.0 / (4.0 + 3.0),  # x projected
+                2.0 * 100.0 * 2.0 / (4.0 + 3.0),  # y projected
+            ),
+        ),
+    ],
+)
+def test_project_perspective(point, focal_length, scale, expected):
+    """Test that project_perspective returns the correct 2‑D projection."""
+    # Call the function under test
+    result = project_perspective(point, focal_length=focal_length, scale=scale)
+
+    # Basic sanity checks
+    assert isinstance(result, tuple), "Result should be a tuple"
+    assert len(result) == 2, "Result should contain two coordinates"
+
+    # Confirm values are close to expected (within tiny tolerance)
+    assert approx_equal(result[0], expected[0]), f"X coordinate mismatch: {result[0]} != {expected[0]}"
+    assert approx_equal(result[1], expected[1]), f"Y coordinate mismatch: {result[1]} != {expected[1]}"

test/test_matrixmania/test_projection.py

@@ -0,0 +1,21 @@
+from matrixmania import project_ortho
+
+
+def test_projection_point():
+    #Arrange
+    point = (1.0, 2.0, 3.0)
+    expected_value = (1.0, 2.0)
+
+    #Act
+    result = project_ortho(point)
+
+    #Assert
+    assert result == expected_value
+
+def test_projection_scale():
+    point = (1.0, 2.0, 3.0)
+    scale = 100
+    expected_value = (100.0, 200.0)
+
+    result = project_ortho(point, scale)
+    assert result == expected_value

test/test_matrixmania/test_rot.py

@@ -0,0 +1,38 @@
+import pytest
+from matrixmania import rot_2D, rot_3D
+import math
+
+def test_rot_2D():
+    #Arrange
+    theta = math.pi / 2
+    expected_value = [
+        [0.0, -1.0],
+        [1.0,  0.0]
+    ]
+
+
+    #Act
+    result = rot_2D(theta)
+
+    #Assert
+    assert len(result) == len(expected_value)
+    for row_result, row_expected in zip(result, expected_value):
+        assert row_result == pytest.approx(row_expected, abs=1e-5)
+
+def test_rot_3D():
+    #Arrange
+    angle = 90
+    axis = "z"
+    expected_value = [
+        [0.0, -1.0, 0.0],
+        [1.0,  0.0, 0.0],
+        [0.0,  0.0, 1.0]
+    ]
+
+    #Act
+    result = rot_3D(angle,axis)
+
+    #Assert
+    assert len(result) == len(expected_value)
+    for row_result, row_expected in zip(result, expected_value):
+        assert row_result == pytest.approx(row_expected, abs=1e-5)