Fix library loader for packaged wheels

Author: bnbailey-psl

pyhelios/Visualizer.py

@@ -10,7 +10,7 @@
 import ctypes
 from pathlib import Path
 from contextlib import contextmanager
-from typing import List, Optional, Union
+from typing import List, Optional, Union, Tuple
 
 from .plugins.registry import get_plugin_registry
 from .plugins import helios_lib
@@ -573,7 +573,7 @@ def setCameraFieldOfView(self, angle_FOV: float) -> None:
         except Exception as e:
             raise VisualizerError(f"Failed to set camera field of view: {e}")
 
-    def getCameraPosition(self) -> tuple[vec3, vec3]:
+    def getCameraPosition(self) -> Tuple[vec3, vec3]:
         """
         Get current camera position and look-at point.
         
@@ -649,7 +649,7 @@ def setLightIntensityFactor(self, intensity_factor: float) -> None:
 
     # Window and Display Methods
 
-    def getWindowSize(self) -> tuple[int, int]:
+    def getWindowSize(self) -> Tuple[int, int]:
         """
         Get window size in pixels.
         
@@ -672,7 +672,7 @@ def getWindowSize(self) -> tuple[int, int]:
         except Exception as e:
             raise VisualizerError(f"Failed to get window size: {e}")
 
-    def getFramebufferSize(self) -> tuple[int, int]:
+    def getFramebufferSize(self) -> Tuple[int, int]:
         """
         Get framebuffer size in pixels.
         
@@ -796,7 +796,7 @@ def getWindowPixelsRGB(self, buffer: List[int]) -> None:
         except Exception as e:
             raise VisualizerError(f"Failed to get window pixels: {e}")
 
-    def getDepthMap(self) -> tuple[List[float], int, int]:
+    def getDepthMap(self) -> Tuple[List[float], int, int]:
         """
         Get depth map from current window.