fix(python): dll path

python/CMakeLists.txt

@@ -42,6 +42,13 @@ if(WIN32 AND NOT VIENNALS_SYSTEM_VTK)
   setup_vtk_env(${PROJECT_NAME} ${CMAKE_RUNTIME_OUTPUT_DIRECTORY})
 endif()
 
+if (NOT VIENNALS_SYSTEM_VTK)
+  message(STATUS "[ViennaLS] Setting VTK_DIR to previously created environment")
+  # We set `VTK_DIR` to the previously setup environment to ensure
+  # that the python script can find the library files
+  set(VTK_DIR "${PROJECT_BINARY_DIR}/vtk_env")
+endif()
+
 # --------------------------------------------------------------------------------------------------------
 # Setup 2D-Bindings
 # --------------------------------------------------------------------------------------------------------

python/__init__.py.in

@@ -15,11 +15,24 @@ extra_dll_dir = os.path.dirname(__file__)
 
 if sys.platform == 'win32' and os.path.isdir(extra_dll_dir):
     # Add the VTK dll directory
-    os.add_dll_directory(os.path.join(os.path.abspath("@VTK_DIR@".replace("/lib/cmake/vtk", "")), "bin"))
+
+    vtk_path = "@VTK_DIR@".replace("/lib/cmake/vtk", "")
+
+    if vtk_path:
+        os.add_dll_directory(os.path.abspath("@VTK_DIR@"))
+    else:
+        os.add_dll_directory(os.path.join(os.path.abspath("@VTK_DIR@".replace("/lib/cmake/vtk", "")), "bin"))
+
     # Add the directory of the python bindings
+
     os.add_dll_directory(extra_dll_dir)
 
+    # Remove internal symbols
+
+    del vtk_path
+
 from .@MODULE_NAME@ import *
 
 # Remove internal symbols
+
 del extra_dll_dir