[求助]：如何创建复杂多义线

yinjian68

我想画一个多义线，可构造函数里没有画圆的参数啊
帮帮！

xysyr

the bulge is the tan of 1/4 of included angle:

double bulge1 = tan( (Endangle - Startangle) / 4);

you must also check if (Endangle - Startangle) is
greater than 0 or not and set the bulge + or -

first Vertext is the Startpoint of the Arc,
second Vertext is the Endpoint of the Arc,

the bulge of first Vertex is bulge1, the
bulge of second Vertex is 0

xlgis

给段代码，希望对你有帮助：
        acutPrintf("ppline!");
        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=0.0;
       
        //如果回撤。则不设凸度值
        if(acedGetReal("Pi/Two-pi/: ", &x)!=RTNORM)
        {
                x=0.0;
        }
       
        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);
        pPline->setClosed(1);
       
        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();

yinjian68

终于画出个样子了，谢谢你xlgis ！只是这个凸度挺难弄的