Unity Journal 4 - native plugins

Integrating Native iOS code

• Create bridge in C
• Build as framework
• Unity C# calls into bridge code
• Pass C# delegate to C as function pointer, allows native to call into C# w/o UnitySendMessage

C++ Scripting - part 1

• Hooks from C++ into C# via Marshal.GetFunctionPointerForDelegate
• Handles to managed types (e.g. GameObject) enables more sophisticated usage
• In a way, Unity/C# becomes implementation of a C++ interface

Native UI Overlay for Unity (Android)

• Create desired UI in a fragment
• Build as library (.aar)
• Include library in Unity as a plugin

Plugin tutorial (Unity Android - part 1)

• Create UI / plugin code in a fragment
• DO NOT extend UnityPlayerActivity because this could interfere with other plugins
• Using singleton pattern can enable C# code to easily get a reference to the plugin