STEP: Implementation ported from BambuStudio:

CMake handling is different

STEP: Removed preprocessing stage

STEP: Small refactoring

STEP: Bigger refactoring

STEP: Changed naming on loaded object and volumes:
If the STEP contains exactly one named volume, the object and its first
volume will both have that name. Otherwise, filename w/o suffix is used
as object name and volumes are named using names from the STEP (if there
is none, untranslated "PartN" string is used).

STEP: Load the libraries dynamically on Win

wip

deps/CMakeLists.txt

@@ -189,6 +189,7 @@ endif ()
 include(JPEG/JPEG.cmake)
 include(TIFF/TIFF.cmake)
 include(wxWidgets/wxWidgets.cmake)
+include(OCCT/OCCT.cmake)
 
 set(_dep_list
     dep_Boost
@@ -200,6 +201,7 @@ set(_dep_list
     dep_OpenVDB
     dep_OpenCSG
     dep_CGAL
+    dep_OCCT
     ${PNG_PKG}
     ${ZLIB_PKG}
     ${EXPAT_PKG}