I'm learning Godot to develop in 3D. I want to build a RayCast from the camera as stated here:link

```
# use global coordinates, not local to node
var result = space_state.intersect_ray( Vector3(x1,y1,z1), Vector3(x2,y2,z2) )
```

Please tell me how to get it: Vector3(x1,y1,z1) and Vector3(x2,y2,z2) in global space?

Vector3(x2,y2,z2) - only forms a direction or limits the length of the beam (cut)?