Can you explain what the term Hit Test means in the context of computer graphics or UI?

Hit Test is the process of determining whether a point (for example, touch or click coordinates) is inside a specific graphical object or interface element.

In the context of UI or computer graphics, hit testing is used to handle user interaction with on-screen elements. For example, when a user taps the screen, the system checks which element was "hit" by that tap.

Example in iOS:

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch = touches.first!
    let location = touch.location(in: self.view)
    if someView.frame.contains(location) {
        print("Hit detected on someView")
    }
}

Here, we check whether the touch point falls within the frame of someView — this is the hit test.