The MousePosition property of the Editor.SceneViewportWidget class provides the current position of the mouse cursor within the scene viewport. This property is static, meaning it is shared across all instances of SceneViewportWidget and can be accessed without creating an instance of the class.

To access the current mouse position within the scene viewport, use the MousePosition property. This property returns a Vector2 representing the x and y coordinates of the mouse cursor.

Example usage:

Vector2 currentMousePosition = Editor.SceneViewportWidget.MousePosition;
float mouseX = currentMousePosition.x;
float mouseY = currentMousePosition.y;