Announce the points on a drape panel.
- The first two points in the array are always along the draped line segment.
- The last two are always on the facet.
- If there are 4 points, those two pairs are distinct, i.e. both segment points are to the same side of the facet.
- If there are 3 points, those two pairs share an on-facet point.
- The panel is ordered so the outward normal is to the right of the draped segment.
Last Updated: 10 September, 2019