Signal emiited but not caught/handled?

Question

Hi there,

I am trying to emit a signal to my Camera but it is not being received by it.

---

My scene looks like this in terms of hierarchy:

• RootNode
  
  
  • CameraParentNode
    
    
    • Camera
  • NodeWithScript

---

Camera has a simple script attached, which has a signal and a function that is triggered when this signal is received (this is configured via Node window in editor):


extends Camera

signal rotate_camera(direction)

func onCamerarotatecamera(direction):
print("Rotating camera!")

---

NodeWithScripthas a script attached that emits under certain conditions:

emitsignal('rotatecamera', Vector2(-sign(direction.x), 0.0))
print("Emmited horizontal swipe")


---

In runtime, I see "Emmited horizontal swipe" printed but not "Rotating camera!".
What could be the reason for the emmited signal to not be received by the camera script?

Answer 1

Signal should be defined in script that emit it. So your NodeWithScript script should have next lines:

signal rotate_camera(direction)
...
emit_signal('rotate_camera', Vector2(-sign(direction.x), 0.0))
print("Emmited horizontal swipe")

And node that want to receive signal should connect to it. Your Camera should have next lines:

func _ready():
    # connect node to signal
    get_node("/root/NodeWithScript").connect("rotate_camera", self, "on_Camera_rotate_camera")

func on_Camera_rotate_camera(direction):
    print("Rotating camera!")