From 05a4b79570d91db468abea44259e4a7f825906ca Mon Sep 17 00:00:00 2001
From: Théo de la Hogue
Date: Tue, 27 Jun 2023 14:57:27 +0200
Subject: Addin a multiply operator for GazePosition.

---
 src/argaze/GazeFeatures.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/argaze/GazeFeatures.py b/src/argaze/GazeFeatures.py
index d4307a2..218858a 100644
--- a/src/argaze/GazeFeatures.py
+++ b/src/argaze/GazeFeatures.py
@@ -26,6 +26,9 @@ import numpy
 import pandas
 import cv2
 
+GazePositionType = TypeVar('GazePosition', bound="GazePosition")
+# Type definition for type annotation convenience
+
 @dataclass(frozen=True)
 class GazePosition():
     """Define gaze position as a tuple of coordinates with precision."""
@@ -57,6 +60,11 @@ class GazePosition():
 
         return json.dumps(self, ensure_ascii = False, default=vars)
 
+    def __mul__(self, value) -> GazePositionType:
+        """Multiply gaze position."""
+
+        return GazePosition(numpy.array(self.value) * value, precision= self.precision * numpy.linalg.norm(value))
+
     def __array__(self):
         """Cast as numpy array."""
 
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