OSNAP точки

Acad::ErrorStatus CMyLine::subGetOsnapPoints (
    AcDb::OsnapMode osnapMode,
    int gsSelectionMark,
    const AcGePoint3d &pickPoint,
    const AcGePoint3d &lastPoint,
    const AcGeMatrix3d &viewXform,
    AcGePoint3dArray &snapPoints,
    AcDbIntArray &geomIds) const
{
    assertReadEnabled();

    switch(osnapMode)
    {
    case kOsModeEnd:
        snapPoints.append(m_Points[0]);
        snapPoints.append(m_Points[1]);
        break;
    case kOsModeMid:
        snapPoints.append(AcGePoint3d((m_Points[1]-m_Points[0]).x/2,(m_Points[1]-m_Points[0]).y/2,(m_Points[1]-m_Points[0]).z/2));
        break;
    case kOsModeNear:
        AcGeLine3d line;
        line.set(m_Points[0],m_Points[1]);
        snapPoints.append(line.closestPointTo(pickPoint));
        break;
    }

    return eOk;
}