Update asset paths to use current source directory

Author: euclid-skyline

attachments/CMakeLists.txt

@@ -164,11 +164,11 @@ function (add_chapter CHAPTER_NAME)
     target_link_libraries (${CHAPTER_NAME} ${CHAPTER_LIBS})
   endif ()
   if (DEFINED CHAPTER_MODELS)
-    list(TRANSFORM CHAPTER_MODELS PREPEND "${CMAKE_SOURCE_DIR}/attachments/assets/")
+    list(TRANSFORM CHAPTER_MODELS PREPEND "${CMAKE_CURRENT_SOURCE_DIR}/assets/")
     file (COPY ${CHAPTER_MODELS} DESTINATION ${CMAKE_BINARY_DIR}/${CHAPTER_NAME}/models)
   endif ()
   if (DEFINED CHAPTER_TEXTURES)
-    list(TRANSFORM CHAPTER_TEXTURES PREPEND "${CMAKE_SOURCE_DIR}/attachments/assets/")
+    list(TRANSFORM CHAPTER_TEXTURES PREPEND "${CMAKE_CURRENT_SOURCE_DIR}/assets/")
     file (COPY ${CHAPTER_TEXTURES} DESTINATION ${CMAKE_BINARY_DIR}/${CHAPTER_NAME}/textures)
   endif ()