visiblePartX and visiblePartY no longer available

[irot]

Are the visiblePartX and visiblePartY arguments as used in your advanced.html example no longer available?

Said example doesn't seem to do anything and trying it with my own code returns undefined for both third and fourth arguments.

[ksaltik]

Those options will be very useful for doing fantastic things......But it seems they are not available anymore.....
You can find those available options in these pen https://codepen.io/Ben_eploy/pen/YPBZwb/