Calling a method accepting a struct (Il2Cpp.ValueType)

[SamueleD78]

in the UnityEngine.CoreModule, UnityEngine.Camera class, i want to call the method UnityEngine.Vector3 WorldToScreenPoint(UnityEngine.Vector3 position);

UnityEngine.Vector3 is a struct.

I have the UnityEngine.Vector3 object stored in a UnityEngine.Bounds mKartBounds object (again, a struct).

So i do this way:

const mBounds = mGraphicKartDriver.field<Il2Cpp.ValueType>("mBounds").value.box();

const sMin = UnityEngineCamera.method<Il2Cpp.ValueType>("WorldToScreenPoint", 1).invoke(mBounds.method<Il2Cpp.Object>("get_min").invoke());

and i get an error...

Error: access violation accessing 0x1e24

if i disassemble the function, i see:

float __fastcall UnityEngine_CoreModule::UnityEngine::Camera::WorldToScreenPoint2(
        __int64 a1,
        float a2,
        float a3,
        float a4)
{
  return UnityEngine_CoreModule::UnityEngine::Camera::WorldToScreenPoint(a1, 2LL, a2, a3, a4);
}

[vfsfitvnm]

Just call Il2Cpp.Object::unbox:

mBounds.method<Il2Cpp.Object>("get_min").invoke().unbox();

[SamueleD78]

if i unbox() it i receive TypeError: not a function
Maybe is giving back a pointer to a Il2Cpp.ValueType and not a Il2Cpp.Object? How i use it in that case?

[vfsfitvnm]

Uhm, so get_min already returns a value type.

I think you can invoke WorldToScreenPoint only from the main thread:

Il2Cpp.mainThread.schedule(() => {
  // ...
});