Negative values dont work as expected

Expected behavior is:

Top Left / Top Right are set on a vertical column and it has negative value then the corners should be opposite so Bottom Left / Bottom Right.

I've made changes to ours to fix this, but it only covers our use cases (vertical columns only):

```
if(point.y < 0){
var tmpTopLeft = rTopLeft,
tmpTopRight = rTopRight,
tmpBottomLeft = rBottomLeft,
tmpBottomRight = rBottomRight;

rTopLeft = tmpBottomLeft;
rTopRight = tmpBottomRight;
rBottomLeft = tmpTopLeft;
rBottomRight = tmpTopRight;
}
```

I considered forking for this fix but it only works on vertical columns and may cause problems on horizontal columns.

Start by locating the column corner-handling code and trace how Top Left, Top Right, Bottom Left, and Bottom Right are assigned for vertical and horizontal columns. Reproduce the negative-value case, then verify that corner placement is reversed correctly for both orientations without breaking positive values.

Written by the indexing model from the issue text.