[讨论]：关于AcDbPolyline

warmrain

看下面代码
        AcDbPolyline *pPline = new AcDbPolyline(4);
        AcGePoint2d pt;
        pt.x=520;
        pt.y=60;
        pPline->addVertexAt(0,pt,0.0,-1.0,-1.0);
        pt.x=550;
        pt.y=30;
        pPline->addVertexAt(0,pt,0.0,-1.0,-1.0);
        pt.x=600;
        pt.y=30;
                     ads_real x;
                     acedGetReal("Pi/Two-pi/<number>: ", &x);
        pPline->addVertexAt(0,pt,x,-1.0,-1.0);
        pt.x=630;
        pt.y=60;
        pPline->addVertexAt(0,pt,0.0,-1.0,-1.0);
        pPline->setThickness(20);
        pPline->setColorIndex(4);

        AcDbBlockTable *pBlockTable;
    AcDbBlockTableRecord *pSpaceRecord;
    acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pBlockTable, AcDb::kForRead);
    pBlockTable->getAt(ACDB_MODEL_SPACE, pSpaceRecord,AcDb::kForWrite);
    pBlockTable->close();
        AcDbObjectId plineId;
    pSpaceRecord->appendAcDbEntity(plineId, pPline);
    pSpaceRecord->close();
        pPline->close();



执行的时候要求输入一个值给x，也就是第二段的凸度，如果不输数值直接回车，就会得到中间缺了一段的多义线。这是不是bug呢？

xuetao

不是bug,见附件

fylinwater

问题找到了，其实你没有输入数据导致获得了一个很大的凸度，圆半径太大而看不见圆弧， 这样很危险，会给以后绘图带入隐患