portal: combating the space-detection issue. what needs to be tweaked next is how far away objects are spawned. it should either be a trial&error adjustment or depend on the object's moving direction and the portal's angle in order to avoid issues with box collisions. if the spawn distance to the portal is just a fixed value (as it was before this patch) or a constant factor (it is now) it can be too big for "nice" portal angles (in tight gaps with still enough space, but -> denied) and too small for bad angles (box collision esp. on big objects like barrels -> denied)

file(GLOB lua_src *.c *.h)
set(LIBRARY_OUTPUT_PATH ${EXECUTABLE_OUTPUT_PATH})

IF(APPLE)
	set(build_type STATIC)
	add_definitions(-DLUA_USE_LINUX)
	add_library (lua ${build_type} ${lua_src})
ENDIF(APPLE)

IF(WIN32)
	set(build_type SHARED)
	add_definitions(-DLUA_BUILD_AS_DLL)
	add_library (lua ${build_type} ${lua_src})

	SET_TARGET_PROPERTIES(lua PROPERTIES PREFIX "")
	install(TARGETS lua RUNTIME DESTINATION ${target_dir})
endif(WIN32)