Touch detection within dynamic curving shader

We need to detect touch of the object but within dynamic curving shader - where original position of the collider is not in the place of what is seen on the screen, We have constntly changing x and y of the curving shader and if there exists some other touch.detection way beside collider please explain us or another way could be through attached gui objects, where position of the gui object depends on the curving x and y axis and distance from player.

Thanks in advance