ENH: Only search VTK_INSTALL_PATH if USE_INSTALLED_VTK is on. Only search VTK_BINARY_PATH if USE_BUILT_VTK is on.

Modules/FindVTK.cmake

@@ -46,13 +46,13 @@ IF(NOT VTK_DIR)
   # Old scripts may set these directories in the CMakeCache.txt file.
   # They can tell us where to find VTKConfig.cmake.
   SET(VTK_DIR_SEARCH_LEGACY "")
-  IF(VTK_BINARY_PATH)
+  IF(VTK_BINARY_PATH AND USE_BUILT_VTK)
     SET(VTK_DIR_SEARCH_LEGACY ${VTK_DIR_SEARCH_LEGACY} ${VTK_BINARY_PATH})
-  ENDIF(VTK_BINARY_PATH)
-  IF(VTK_INSTALL_PATH)
+  ENDIF(VTK_BINARY_PATH AND USE_BUILT_VTK)
+  IF(VTK_INSTALL_PATH AND USE_INSTALLED_VTK)
     SET(VTK_DIR_SEARCH_LEGACY ${VTK_DIR_SEARCH_LEGACY}
         ${VTK_INSTALL_PATH}/lib/vtk)
-  ENDIF(VTK_INSTALL_PATH)
+  ENDIF(VTK_INSTALL_PATH AND USE_INSTALLED_VTK)
 
   #
   # Look for an installation or build tree.