ObjectArx的一次常用方法 .txt

ObjectArx的一次常用方法   https://www.cnblogs.com/luzhiw/p/4043723.html


1.画一条直线


static void ArxProject1_DrawLine(void)
    {

        
        //定义两点确定一条直线
        AcGePoint3d ptStart( 0 , 0 , 0);
        AcGePoint3d ptEnd( 100 , 100 , 0);
        AcDbLine* lnNew = new AcDbLine( ptStart , ptEnd);
        
　　　　　//获取当前图形数据库
        AcDbBlockTable* pBlockTable = NULL;
        acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBlockTable ,  AcDb::kForWrite);

        AcDbBlockTableRecord* pBlockTableRecord = NULL;
        pBlockTable->getAt(ACDB_MODEL_SPACE , pBlockTableRecord , AcDb::kForWrite);
　　　　　
　　　　　//插入当前的图形数据库
        AcDbObjectId lnId;
        pBlockTableRecord->appendAcDbEntity( lnId , lnNew);
　　　　
　　　　　//关闭对象
        lnNew->close();
        pBlockTableRecord->close();
        pBlockTable->close();

    }


2.画一段圆弧
static void ArxProject1_DrawArc(void)
    {
        //三点创建一个圆弧
        AcGePoint2d ptStartPoint( 0 , 100 );
        AcGePoint2d ptEndPoint( 0 , 100 );
        AcGePoint2d ptCenterPoint(0 , 0);

        AcGeVector2d vecStart(ptStartPoint.x - ptCenterPoint.x ,  ptStartPoint.y - ptCenterPoint.y);
        AcGeVector2d vecEnd(ptEndPoint.x - ptCenterPoint.x ,  ptEndPoint.y - ptCenterPoint.y);
        double StartAng = vecStart.angle();
        double EndAng = vecEnd.angle();
        
        AcGePoint3d pt( 0 , 0, 0);
        AcGeVector3d vec( 0 , 0 ,1);
        AcDbArc* Acr = NULL;
        Acr = new AcDbArc(pt ,vec ,  100, StartAng , EndAng);

        AcDbBlockTable* pBlockTable = NULL;
        ErrorStatus es =  acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBlockTable , AcDb::kForWrite);

        AcDbBlockTableRecord* pBlockTableRecord = NULL;
        es = pBlockTable->getAt(ACDB_MODEL_SPACE , pBlockTableRecord,  AcDb::kForWrite);
        
        AcDbObjectId oid;
        es = pBlockTableRecord->appendAcDbEntity(oid , Acr);