Mastering UI Development with Unity

Graphic Raycaster component

The Graphic Raycaster allows you to check to see whether objects on the Canvas have been hit by a user input using the EventSystem. As discussed when looking at the World Space Canvas Render Mode, when a user touches the screen, a ray is cast forward from the point on the screen at which the player touches. The Graphic Raycaster checks these rays and sees if they hit something on the Canvas.

You can adjust the following properties on the Graphic Raycaster component:

• Ignore Reversed Graphics: If a UI element is facing away from the player, having this selected will stop the hit from registering. If it is not selected, ...