Fixed CMake file for VTK in dependent projects.

CMakeLists.txt

@@ -46,7 +46,7 @@ if(VIENNALS_USE_VTK)
   find_package(VTK QUIET)
   if(VTK_FOUND)
     message(STATUS "Found VTK")
-    add_definitions(-DVIENNALS_USE_VTK)
+    add_compile_definitions(VIENNALS_USE_VTK)
     include(${VTK_USE_FILE})
     # only link needed vtk libraries for static builds
     if(VIENNALS_STATIC_BUILD)

cmake/ViennaLSConfig.cmake.in

@@ -28,6 +28,26 @@ else(ViennaLS_COMMON_TARGET)
   #  include("${CMAKE_CURRENT_LIST_DIR}/@[email protected]")
 endif()
 
+if(@VIENNALS_USE_VTK@)
+  add_compile_definitions(VIENNALS_USE_VTK)
+  if(NOT VTK_DIR)
+    set(VTK_DIR $ENV{VTK_DIR})
+  endif(NOT VTK_DIR)
+  find_package(VTK QUIET)
+  if(VTK_FOUND)
+    message(STATUS "Found VTK")
+    add_compile_definitions(VIENNALS_USE_VTK)
+    include(${VTK_USE_FILE})
+    # only link needed vtk libraries for static builds
+    if(VIENNALS_STATIC_BUILD)
+      set(VTK_LIBRARIES vtksys;vtkIOCore;vtkexpat;vtklz4;vtkzlib;vtklzma;vtkdoubleconversion;vtkCommonMisc;vtkCommonSystem;vtkIOXML)
+    endif(VIENNALS_STATIC_BUILD)
+    list(APPEND VIENNALS_LIBRARIES ${VTK_LIBRARIES})
+    list(APPEND VIENNALS_PYTHON_LIBRARIES ${VTK_LIBRARIES})
+  else(VTK_FOUND)
+    message(STATUS "No VTK install found: Building without VTK.")
+  endif(VTK_FOUND)
+endif()
 
 if(@VIENNALS_BUILD_SHARED_LIBS@)
   option(VIENNALS_USE_SHARED_LIBS "Use precompiled headers" ON)

include/lsWriteVisualizationMesh.hpp

@@ -440,7 +440,7 @@ template <class T, int D> class lsWriteVisualizationMesh {
         lsMessage::getInstance()
             .addWarning("lsWriteVisualizationMesh: Level Set " +
                         std::to_string(i) +
-                        " must have a width greater than 2! Not converting!")
+                        " should have a width greater than 2! Conversion might fail!")
             .print();
       }
     }
@@ -526,9 +526,6 @@ template <class T, int D> class lsWriteVisualizationMesh {
       if (it->get()->getNumberOfPoints() == 0)
         continue; // ignore empty levelSets
 
-      assert(it->get()->getLevelSetWidth() >=
-             numLayers); // check if enough information
-
       // create grid of next LS with slight offset and project into current mesh
       vtkSmartPointer<vtkRectilinearGrid> rgrid =
           vtkSmartPointer<vtkRectilinearGrid>::New();