SetPointIn
path->SetPointIn(end, vector2);
fPath->SetPointIn(index, pointIn);
fPath->SetPointIn(index + 1, nextIn);
fPath->SetPointIn(index, p);
fPath->SetPointIn(fCurrentPathPoint, canvasWhere);
fPath->SetPointIn(fIndex + 1, nextIn);
fPath->SetPointIn(fIndex, nextIn);
bool SetPointIn(int32 index, BPoint point);