A sample position on a subpixel grid.
- iOS 11.0+
- macOS 10.13+
- tvOS 11.0+
Floating-point values are in the
[0 range along each axis, with the origin
(0, 0) defined at the top-left corner. Values can be set from
0/16 up to
15/16, inclusive, in
0/16 increments along each axis.