ENH: Allow custom library definition

Expand the imstk_add_library cmake function by exposing the variables
H_FILES (headers) CPP_FILES (source) and SUBDIR_LIST (build interface
directories - the current source dir is always included).

If those values are not manually set, the previous behavior applies,
where all the files and directories in the root directory are used for
that target.

Used that new mechanism for the Rendering target to prepare for Vulkan
integration.

Base/Rendering/CMakeLists.txt

@@ -3,9 +3,30 @@
 #-----------------------------------------------------------------------------
 include(imstkAddLibrary)
 imstk_add_library( Rendering
+  H_FILES
+    imstkVTKRenderer.h
+    RenderDelegate/imstkVTKCubeRenderDelegate.h
+    RenderDelegate/imstkVTKLineMeshRenderDelegate.h
+    RenderDelegate/imstkVTKPlaneRenderDelegate.h
+    RenderDelegate/imstkVTKRenderDelegate.h
+    RenderDelegate/imstkVTKSphereRenderDelegate.h
+    RenderDelegate/imstkVTKSurfaceMeshRenderDelegate.h
+    RenderDelegate/imstkVTKTetrahedralMeshRenderDelegate.h
+  CPP_FILES
+    imstkVTKRenderer.cpp
+    RenderDelegate/imstkVTKCubeRenderDelegate.cpp
+    RenderDelegate/imstkVTKLineMeshRenderDelegate.cpp
+    RenderDelegate/imstkVTKPlaneRenderDelegate.cpp
+    RenderDelegate/imstkVTKRenderDelegate.cpp
+    RenderDelegate/imstkVTKSphereRenderDelegate.cpp
+    RenderDelegate/imstkVTKSurfaceMeshRenderDelegate.cpp
+    RenderDelegate/imstkVTKTetrahedralMeshRenderDelegate.cpp
+  SUBDIR_LIST
+    RenderDelegate
   DEPENDS
     ${VTK_LIBRARIES}
     Scene
+  #VERBOSE
   )
 
 #-----------------------------------------------------------------------------

CMake/Utilities/imstkAddLibrary.cmake

@@ -14,7 +14,7 @@ function(imstk_add_library target)
 
   set(options VERBOSE)
   set(oneValueArgs)
-  set(multiValueArgs H_FILES CPP_FILES DEPENDS)
+  set(multiValueArgs H_FILES CPP_FILES SUBDIR_LIST DEPENDS)
   include(CMakeParseArguments)
   cmake_parse_arguments(target "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN} )
 
@@ -32,14 +32,26 @@ function(imstk_add_library target)
   #-----------------------------------------------------------------------------
   # Get files and directories
   #-----------------------------------------------------------------------------
-  file(GLOB_RECURSE target_H_FILES "${CMAKE_CURRENT_SOURCE_DIR}/imstk*.h")
-  file(GLOB_RECURSE target_CPP_FILES "${CMAKE_CURRENT_SOURCE_DIR}/imstk*.cpp")
-  file(GLOB_RECURSE testing_FILES "${CMAKE_CURRENT_SOURCE_DIR}/Testing/*")
-  if(testing_CPP_FILES)
-    list(REMOVE_ITEM target_H_FILES ${testing_FILES})
-    list(REMOVE_ITEM target_CPP_FILES ${testing_FILES})
+  if( NOT target_H_FILES AND NOT target_CPP_FILES )
+    file(GLOB_RECURSE target_H_FILES "${CMAKE_CURRENT_SOURCE_DIR}/imstk*.h")
+    file(GLOB_RECURSE target_CPP_FILES "${CMAKE_CURRENT_SOURCE_DIR}/imstk*.cpp")
+    file(GLOB_RECURSE testing_FILES "${CMAKE_CURRENT_SOURCE_DIR}/Testing/*")
+    if(testing_CPP_FILES)
+      list(REMOVE_ITEM target_H_FILES ${testing_FILES})
+      list(REMOVE_ITEM target_CPP_FILES ${testing_FILES})
+    endif()
+  endif()
+
+  if( NOT target_SUBDIR_LIST )
+    imstk_subdir_list(target_SUBDIR_LIST ${CMAKE_CURRENT_SOURCE_DIR})
   endif()
-  imstk_subdir_list(target_SUBDIR_LIST ${CMAKE_CURRENT_SOURCE_DIR})
+
+  list(APPEND target_BUILD_INTERFACE_LIST "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>")
+  foreach(subdir ${target_SUBDIR_LIST})
+    if( NOT ${subdir} STREQUAL "Testing")
+      list(APPEND target_BUILD_INTERFACE_LIST "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/${subdir}>")
+    endif()
+  endforeach()
 
   #-----------------------------------------------------------------------------
   # Create target (library)
@@ -59,11 +71,6 @@ function(imstk_add_library target)
   #-----------------------------------------------------------------------------
   # Include directories
   #-----------------------------------------------------------------------------
-  list(APPEND target_BUILD_INTERFACE_LIST "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>")
-  foreach(subdir ${target_SUBDIR_LIST})
-    list(APPEND target_BUILD_INTERFACE_LIST "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/${subdir}>")
-  endforeach()
-
   target_include_directories( ${target} PUBLIC
     ${target_BUILD_INTERFACE_LIST}
     $<INSTALL_INTERFACE:${iMSTK_INSTALL_INCLUDE_DIR}>