C++ AcGeVector3d类代码示例

static bool CheackTubeLenth(AcDbObjectId& objId)
{
	objId = ArxUtilHelper::SelectObject( _T( "请选择一条瓦斯管路:" ) );
	if( objId.isNull() ) return false;
	if( !ArxUtilHelper::IsEqualType( _T( "GasTube" ), objId ) ) return false;

	AcTransaction *pTrans = actrTransactionManager->startTransaction();
	if ( 0 == pTrans ) return false;
	AcDbObject *pObj;
	if (Acad::eOk != pTrans->getObject(pObj,objId,AcDb::kForRead)) return false;
	GasTube *pGasTube = GasTube::cast(pObj);
	if ( 0 == pGasTube)
	{
		actrTransactionManager->abortTransaction();
		return false;
	}
	AcGePoint3d spt,ept;
	pGasTube->getSEPoint(spt,ept);
	//double angle = pGasTube->getAngle();
	actrTransactionManager->endTransaction();

	AcGeVector3d v = ept - spt;
	double tubeLenth = v.length();
	return true;
}

Acad::ErrorStatus
ArxDbgDbEntity::setNormal(const AcGeVector3d& nvec)
{
    if (nvec.isZeroLength()) {
        ASSERT(0);
        return Acad::eInvalidInput;
    }

    if (nvec != m_zDir) {
        assertWriteEnabled();

        AcGeVector3d txdir, tydir;
        AcGeVector3d txdiro, tydiro;

        ArxDbgUtils::getEcsXAxis(nvec, txdir);       // get AutoCAD's arbitrary X-Axis for this normal
        ArxDbgUtils::getEcsXAxis(m_zDir, txdiro);    // get AutoCAD's arbitrary X-Axis for this normal

        tydir = nvec.crossProduct(txdir);
        tydir.normalize();

        tydiro = m_zDir.crossProduct(txdiro);
        tydiro.normalize();

        AcGeMatrix3d mat;
        mat.setToAlignCoordSys(m_origin, txdiro, tydiro, m_zDir,
                               m_origin, txdir,  tydir,  nvec);

        m_xDir.transformBy(mat);
        m_zDir.transformBy(mat);
        m_origin.transformBy(mat);
    }

    return Acad::eOk;
}

void DrawCmd::DrawWindLibrary( void )
{
	AcDbObjectId objId = ArxUtilHelper::SelectObject( _T( "请选择一条巷道:" ) );
	if( objId.isNull() ) return;
	if( !ArxUtilHelper::IsEqualType( _T( "LinkedGE" ), objId ) ) return;


	AcGePoint3d pt,insertPt;

	double angle;

	if( !ArxUtilHelper::PromptPt( _T( "\n请指定风库的插入点坐标:" ), pt ) ) return;

	if( !GetClosePtAndAngle( objId, pt, angle ) ) return;

	AcGeVector3d v = AcGeVector3d(AcGeVector3d::kXAxis);
	v.rotateBy(angle - PI/2,AcGeVector3d::kZAxis);
	v.normalize();

	insertPt = pt + v * 60;

	WindLibrary* pWindLib = new WindLibrary( insertPt, angle ); 	
	if( pWindLib == 0 ) return;


	pWindLib->setRelatedGE( objId ); // 关联巷道

	// 初始化并提交到数据库
	if( !ArxUtilHelper::PostToModelSpace( pWindLib ) ) delete pWindLib;

}

void SingleTunnelDraw::extendByLength( double length )
{
    AcGeVector3d v = m_endPt - m_startPt;
    v.normalize();

    m_endPt = m_endPt + v * length; // 修改末点坐标
}

void
ArxDbgUtils::getEcsToWcsMatrix(const AcGePoint3d& origin,
                    const AcGeVector3d& zAxis, AcGeMatrix3d& mat)
{
    const double kArbBound = 0.015625;         //  1/64th

        // short circuit if in WCS already
    if (zAxis == AcGeVector3d::kZAxis) {
        mat.setToIdentity();
        return;
    }

    AcGeVector3d xAxis, yAxis;

    ASSERT(zAxis.isUnitLength());

    if ((fabs(zAxis.x) < kArbBound) && (fabs(zAxis.y) < kArbBound))
        xAxis = AcGeVector3d::kYAxis.crossProduct(zAxis);
    else
        xAxis = AcGeVector3d::kZAxis.crossProduct(zAxis);

    xAxis.normalize();
    yAxis = zAxis.crossProduct(xAxis);
    yAxis.normalize();

    mat.setCoordSystem(AcGePoint3d::kOrigin, xAxis, yAxis, zAxis);
}

double LinkedGE::getAngle() const
{
    assertReadEnabled();

    AcGeVector3d v = m_endPt - m_startPt;
    return v.angleTo( AcGeVector3d::kXAxis, -AcGeVector3d::kZAxis );
}

AcGeVector3d PDEcone::getFaceVect() const
{
    assertReadEnabled();
    AcGeVector3d centerVect = m_ptEnd - m_ptStart;
	AcGeVector3d tmpV1 = centerVect.crossProduct(m_vect);
	return m_vect.crossProduct(tmpV1).normal();
}

void DrawArc( AcGiWorldDraw* mode, const AcGePoint3d& spt, const AcGePoint3d& pt, const AcGePoint3d& ept, bool fill )
{
    AcGiSubEntityTraits& traits = mode->subEntityTraits();
    AcGiFillType ft = traits.fillType();
    traits.setFillType( fill ? kAcGiFillAlways : kAcGiFillNever );

    AcGeCircArc3d arc( spt, pt, ept );
    AcGePoint3d cnt = arc.center();
    double radius = arc.radius();
    AcGeVector3d sv = spt - cnt;
    AcGeVector3d ev = ept - cnt;
    double sa = sv.angleTo( AcGeVector3d::kXAxis, -AcGeVector3d::kZAxis );
    double ea = ev.angleTo( AcGeVector3d::kXAxis, -AcGeVector3d::kZAxis );

    if( arc.normal().z > 0 )
    {
        AcDbArc arcEnt( cnt, radius, sa, ea );
        arcEnt.worldDraw( mode );
    }
    else
    {
        AcDbArc arcEnt( cnt, radius, ea, sa );
        arcEnt.worldDraw( mode );
    }

    // 恢复属性
    traits.setFillType( ft );
}

AcGeVector3d DoubleLine::getEndPointInExtendAngle() const
{
    AcGeVector3d v = m_endPt - m_startPt;
    v.rotateBy( PI, AcGeVector3d::kZAxis ); // 旋转180度

    return v;
}

void DoubleLine::update()
{
    AcGeVector3d v = m_endPt - m_startPt;
    double angle = v.angleTo( AcGeVector3d::kXAxis, -AcGeVector3d::kZAxis );
    caclLeftPoint( angle, m_leftStartPt, m_rightStartPt );
    caclRightPoint( angle, m_leftEndPt, m_rightEndPt );
}

void
ArxDbgDbEntity::getEcs(AcGeMatrix3d& retVal) const
{
    AcGeVector3d yDir = m_zDir.crossProduct(m_xDir);

    retVal.setCoordSystem(m_origin, m_xDir, yDir.normal(), m_zDir);
}

void
createSmiley()
{
    AcGePoint3d cen;
    struct resbuf rbFrom, rbTo;

    ads_getpoint( NULL, "\nCenter point: ", asDblArray( cen ));

    rbFrom.restype = RTSHORT;
    rbFrom.resval.rint = 1; // from UCS
    rbTo.restype = RTSHORT;
    rbTo.resval.rint = 0; // to WCS

    ads_trans( asDblArray( cen ), &rbFrom, &rbTo, Adesk::kFalse, asDblArray( cen ));

    AcGeVector3d x = acdbHostApplicationServices()->workingDatabase()->ucsxdir();
    AcGeVector3d y = acdbHostApplicationServices()->workingDatabase()->ucsydir();

    AcGeVector3d normalVec = x.crossProduct( y );
    normalVec.normalize();

    SmileyJig jig( cen, normalVec );

    jig.start();
}

AcGePoint3d DoubleTTunnelDraw::caclHeadPoint()
{
    AcGeVector3d v = m_endPt - m_startPt;
    v.normalize(); // 单位方向向量
    v = v * m_distance;

    return m_endPt + v;
}

void GasPumpGEDraw::extendByLength( double length )
{
	AcGeVector3d v = m_endPt - m_startPt;
	v.normalize();

	m_endPt = m_endPt + v * length; // 更新末点坐标
	update();
}

void DoubleTunnelDraw::extendByLength( double length )
{
    AcGeVector3d v = m_endPt - m_startPt;
    v.normalize();

    m_endPt = m_endPt + v * length; // 更新末点坐标
    update(); // 更新其它参数
}