Change cmake generated project files directory - visual-studio

Question

I could not find any question that was helpful concerning my question, so here it is (or prove me wrong).
First: I do everything under Windows and build only for Visual Studio.
My Situation: I have my main directory which contains a "main" CMakeLists. So here is were to make the cmake call and it does not much itself:
cmake_minimum_required(VERSION 3.13.1)
project (EulerAdventureReinvented)
if (CMAKE_GENERATOR MATCHES Win64)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/lib/Win64/")
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/lib/Win64/")
set(EXECUTABLE_OUTPUT_PATH "${CMAKE_SOURCE_DIR}/bin/Win64/")
else()
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/lib/Win32/")
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/lib/Win32/")
set(EXECUTABLE_OUTPUT_PATH "${CMAKE_SOURCE_DIR}/bin/Win32/")
endif()
add_subdirectory(source)
But it adds another CMakeLists in the source directory which does the setup for the "main" project. So it contains the add_executable call and I wanna keep it that way. But the problem is that it does write the vcxproj files, CMakeFiles dir into that source directory, but I want them in the root directory or... well just somewhere else.
Final Question: What do I need to set for this? I mean which variable is the one I want to change. I searched and found so many that I came to a point of trial and error and even then did not find my files somewhere else.
EDIT: I changed the title a bit to avoid confusion between build and generated files. I do not want to set the build path, since that is already done by the above code.

Answer 1

In CMake 3.13.2 the following switches are available:
cmake [<options>] -S <path-to-source> -B <path-to-build>
So in the case you described above it would be something like:
cmake -S . -B .\build
Now, there is no variable for setting <path-to-build> but you can get it's information from CMAKE_BINARY_DIR. The variables you are setting control where artifacts wind up but not where project files are created or intermediate files are located.