Make pymunk optional

Author: Cleptomania

arcade/__init__.py

@@ -192,10 +192,12 @@ def configure_logging(level: int | None = None):
 from .tilemap import load_tilemap
 from .tilemap import TileMap
 
-if sys.platform != "emscripten":
+try:
     from .pymunk_physics_engine import PymunkPhysicsEngine
     from .pymunk_physics_engine import PymunkPhysicsObject
     from .pymunk_physics_engine import PymunkException
+except ImportError:
+    pass
 
 from .version import VERSION
 

arcade/hitbox/__init__.py

@@ -1,7 +1,6 @@
 from PIL.Image import Image
 
 from arcade.types import Point2List
-from arcade.utils import is_pyodide
 
 from .base import HitBox, HitBoxAlgorithm, RotatableHitBox
 from .bounding_box import BoundingHitBoxAlgorithm
@@ -10,12 +9,15 @@
 
 #: The simple hit box algorithm.
 algo_simple = SimpleHitBoxAlgorithm()
-#: The detailed hit box algorithm.
 
-if not is_pyodide():
+#: The detailed hit box algorithm. This depends on pymunk and will fallback to the simple algorithm.
+try:
     from .pymunk import PymunkHitBoxAlgorithm
-
     algo_detailed = PymunkHitBoxAlgorithm()
+except ImportError:
+    print("WARNING: Running without PyMunk. The detailed hitbox algorithm will fallback to simple")
+    algo_detailed = SimpleHitBoxAlgorithm()
+
 
 #: The bounding box hit box algorithm.
 algo_bounding_box = BoundingHitBoxAlgorithm()

pyproject.toml

@@ -22,7 +22,6 @@ classifiers = [
 dependencies = [
     "pyglet==3.0.dev1",
     "pillow~=12.0.0",
-    "pymunk~=7.2.0",
     "pytiled-parser~=2.2.9",
 ]
 dynamic = ["version"]
@@ -36,6 +35,9 @@ Source = "https://github.com/pythonarcade/arcade"
 Book = "https://learn.arcade.academy"
 
 [dependency-groups]
+extras = [
+    "pymunk~=7.2.0"
+]
 # Used for dev work
 dev = [
     "sphinx==8.1.3",               # April 2024 | Updated 2024-07-15, 7.4+ is broken with sphinx-autobuild
@@ -62,8 +64,10 @@ dev = [
     "click==8.1.7",     # Temp fix until we bump typer
     "typer==0.12.5",    # Needed for make.py
     "wheel",
-    "bottle"            # Used for web testing playground
+    "bottle",            # Used for web testing playground
+    {include-group = "extras"}
 ]
+
 # Testing only
 testing_libraries = ["pytest", "pytest-mock", "pytest-cov", "pyyaml==6.0.1"]