From dc2ad56d9967bf186c1e4d5b7a7bc191cb7d402a Mon Sep 17 00:00:00 2001
From: Maic Siemering <maic@siemering.tech>
Date: Mon, 18 Nov 2024 16:37:41 +0100
Subject: [PATCH] make pymunk imports optional, which allows to exclude it
 during packaging with cx_freeze

---
 arcade/__init__.py        |  9 ++++++---
 arcade/hitbox/__init__.py | 12 +++++++++---
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/arcade/__init__.py b/arcade/__init__.py
index a4c812d3e..7a13f3c33 100644
--- a/arcade/__init__.py
+++ b/arcade/__init__.py
@@ -199,9 +199,12 @@ def configure_logging(level: int | None = None):
 from .tilemap import read_tmx
 from .tilemap import TileMap
 
-from .pymunk_physics_engine import PymunkPhysicsEngine
-from .pymunk_physics_engine import PymunkPhysicsObject
-from .pymunk_physics_engine import PymunkException
+try:
+    from .pymunk_physics_engine import PymunkPhysicsEngine
+    from .pymunk_physics_engine import PymunkPhysicsObject
+    from .pymunk_physics_engine import PymunkException
+except ImportError:
+    print("Pymunk is not installed. Pymunk physics engine will not be available.")
 
 from .version import VERSION
 
diff --git a/arcade/hitbox/__init__.py b/arcade/hitbox/__init__.py
index ab5d304dc..974d505e0 100644
--- a/arcade/hitbox/__init__.py
+++ b/arcade/hitbox/__init__.py
@@ -6,18 +6,23 @@
 
 from .base import HitBox, HitBoxAlgorithm, RotatableHitBox
 from .bounding_box import BoundingHitBoxAlgorithm
-from .pymunk import PymunkHitBoxAlgorithm
 from .simple import SimpleHitBoxAlgorithm
 
 #: The simple hit box algorithm.
 algo_simple = SimpleHitBoxAlgorithm()
-#: The detailed hit box algorithm.
-algo_detailed = PymunkHitBoxAlgorithm()
 #: The bounding box hit box algorithm.
 algo_bounding_box = BoundingHitBoxAlgorithm()
 #: The default hit box algorithm.
 algo_default = algo_simple
 
+#: The detailed hit box algorithm, if pymunk available.
+try:
+    from .pymunk import PymunkHitBoxAlgorithm
+    algo_detailed = PymunkHitBoxAlgorithm()
+except ImportError:
+    algo_detailed = None
+    print("Warning: pymunk is not installed. PymunkHitBoxAlgorithm will not be available.")
+
 
 # Temporary functions for backwards compatibility
 def calculate_hit_box_points_simple(image: Image, *args) -> Point2List:
@@ -46,6 +51,7 @@ def calculate_hit_box_points_detailed(
             How detailed to make the hit box. There's a
             trade-off in number of points vs. accuracy.
     """
+    assert algo_detailed, "PymunkHitBoxAlgorithm is not available."
     return algo_detailed.calculate(image, detail=hit_box_detail)