* Require that the length of the new segment is shorter than the *current*
distance to the end of the original segment, rather than the length of the
complete original segment.
* Note that this implementation simply removes vertices that are outside the range.
* It would look far better to insert vertices at the boundary when a segment is heading
out of range. This is more complicated.
* New vertices are successfully created in the intersections between the
curve and draw surface triangles
* New vertices are also inserted along the bottom edge of the filled curve.
* However, new vertices will still need to be inserted in the lines connecting the
top of the curve and the bottom where they intersect with the triangles.
* The option for filled curves remain hidden in the GUI. See #2860.
# Please enter the commit message for your changes. Lines starting
* Project existing points onto triangles first and make sure we choose the right triangle by
sorting possible projections by distance.
* Also allow some tolerance for the inside check.
* Create the new vertices by projecting the curve segment vector onto each triangle plane
before looking for intersections with the triangle edges.
