GetPointAt
if (!path->GetPointAt(p, point))
if (path->GetPointAt(0, a)) {
fPath->GetPointAt(index - 1, previous);
fPath->GetPointAt(index, next);
fPath->GetPointAt(index, p);
if (fPath->GetPointAt(index, p)) {
if (fPath->GetPointAt(index, p)) {
bool GetPointAt(int32 index, BPoint& point) const;