How can I create a new instance of a Ray struct?

[Patrick-van-Halm]

I want to call a method with a custom Ray object. A ray has a constructor of Vector3 Origin and Vector3 Direction, these are also structs.

[maarsalien]

I managed to do this, but i am myself still a little bit confused about how the unbox work maybe @vfsfitvnm will have a good explanation for all of us

import 'frida-il2cpp-bridge';

const log = console.log.bind(console);

function Vector3(x = 0, y = 0, z = 0) {
  const Vector3 = Il2Cpp.domain.assembly('UnityEngine.CoreModule').image.class('UnityEngine.Vector3');
  const vector3 = Vector3.alloc();
  vector3.method('.ctor', 3).invoke(x, y, z);
  return vector3;
}

function Ray(origin = Vector3(), direction = Vector3(0, 0, 1)) {
  const Ray = Il2Cpp.domain.assembly('UnityEngine.CoreModule').image.class('UnityEngine.Ray');
  const ray = Ray.alloc();
  ray.method('.ctor', 2).invoke(origin.unbox(), direction.unbox());
  return ray;
}

Il2Cpp.perform(() => {
  const origin = Vector3();
  const direction = Vector3(10, 20, 30);

  const ray = Ray(origin, direction);

  log();
  log('ray', ray);
  log('GetPoint', ray.method('GetPoint', 1).invoke(10));
});

[maarsalien]

and also, instead of changing the ray reference, you could just call the set_origin and set_direction on the intercepted method to replace the coordinates.