touch controls and hud

camera_iso.gd

@@ -42,6 +42,15 @@ func _unhandled_input(event: InputEvent) -> void:
 		_user_fov = clamp(_user_fov * 1.1, fov_min, fov_max)
 
 
+# Pinch-to-zoom hook for the touch UI. `ratio` is the two-finger spread this frame over
+# last frame: >1 (fingers parting) narrows the FOV to zoom in, <1 widens it to pull back,
+# mirroring the scroll-wheel zoom_in/zoom_out feel.
+func adjust_zoom(ratio: float) -> void:
+	if ratio <= 0.0:
+		return
+	_user_fov = clampf(_user_fov / ratio, fov_min, fov_max)
+
+
 func _process(delta: float) -> void:
 	fov = lerpf(fov, _user_fov, delta * 8.0)