Disable all 3D nodes, physics, and resources when compiling without 3D

servers/physics_server_3d.h

@@ -31,6 +31,8 @@
 #ifndef PHYSICS_SERVER_3D_H
 #define PHYSICS_SERVER_3D_H
 
+#ifndef _3D_DISABLED
+
 #include "core/io/resource.h"
 #include "core/object/class_db.h"
 #include "core/object/gdvirtual.gen.inc"
@@ -1055,4 +1057,6 @@ VARIANT_ENUM_CAST(PhysicsServer3D::G6DOFJointAxisFlag);
 VARIANT_ENUM_CAST(PhysicsServer3D::AreaBodyStatus);
 VARIANT_ENUM_CAST(PhysicsServer3D::ProcessInfo);
 
+#endif // _3D_DISABLED
+
 #endif // PHYSICS_SERVER_3D_H