Enable AppleMomentumScrollSupported on macOS

lib/irrlicht/CMakeLists.txt

@@ -550,6 +550,16 @@ if(IOS)
     set_source_files_properties(source/Irrlicht/CIrrDeviceiOS.mm PROPERTIES LANGUAGE C)
 endif()
 
+if (NOT SERVER_ONLY AND APPLE AND NOT IOS)
+    set(IRRLICHT_SOURCES
+        ${IRRLICHT_SOURCES}
+        source/Irrlicht/MacOS.mm)
+
+    set_source_files_properties(source/Irrlicht/MacOS.mm PROPERTIES COMPILE_FLAGS "-x objective-c++ -O3  -fno-rtti")
+    set_source_files_properties(source/Irrlicht/MacOS.mm PROPERTIES LANGUAGE C)
+
+endif()
+
 add_library(stkirrlicht STATIC ${IRRLICHT_SOURCES})
 
 target_link_libraries(stkirrlicht ${ZLIB_LIBRARY})

lib/irrlicht/source/Irrlicht/CIrrDeviceSDL.cpp

@@ -52,6 +52,7 @@ namespace irr
 } // end namespace irr
 
 extern "C" void init_objc(SDL_SysWMinfo* info, float* top, float* bottom, float* left, float* right);
+extern "C" void enable_momentum_scroll();
 extern "C" int handle_app_event(void* userdata, SDL_Event* event);
 extern "C" void Android_initDisplayCutout(float* top, float* bottom, float* left, float* right, int* initial_orientation);
 extern "C" int Android_disablePadding();
@@ -122,6 +123,10 @@ CIrrDeviceSDL::CIrrDeviceSDL(const SIrrlichtCreationParameters& param)
 	// create window
 	if (CreationParams.DriverType != video::EDT_NULL)
 	{
+#if defined(_IRR_OSX_PLATFORM_) && !defined(IOS_STK)
+		enable_momentum_scroll();
+#endif
+
 		// create the window, only if we do not use the null device
 		if (!Close && createWindow())
 		{

lib/irrlicht/source/Irrlicht/MacOS.mm

@@ -0,0 +1,6 @@
+#import <AppKit/AppKit.h>
+
+extern "C" void enable_momentum_scroll()
+{
+    [[NSUserDefaults standardUserDefaults] setBool: YES forKey: @"AppleMomentumScrollSupported"];
+}