invert method
Inverts an output to input.
Implementation
@override
Offset invert(Offset output) {
final horizontalInput = (output.dx - horizontals.first) /
(horizontals.last - horizontals.first);
final verticalInput =
(output.dy - verticals.first) / (verticals.last - verticals.first);
return transposed
? Offset(verticalInput, horizontalInput)
: Offset(horizontalInput, verticalInput);
}