急问:怎么用arx修改polyline中弧的圆心坐标，琢磨好几天了！

大粽子

如题，急问:怎么用arx修改polyline中弧的圆心坐标

XDSoft

把你写的代码贴上来吧。

XDSoft

AcDbPolyline类下面编辑函数里面能用到的不外乎下面两种

2. 
   
3. AcDbPolyline::setBulgeAt Function Acad::ErrorStatus
   
4. 
   
5. setBulgeAt(
   
6. 
   
7. unsigned int index,
   
8. 
   
9. double bulge);
   
10. 
    
11. index Input index (0 based) of the vertex
    
12. bulge Input bulge value for the vertex
    
13. 
    
14. This function sets bulge to be the bulge value for the index vertex. This will determine the bulge for the polyline segment which follows the index vertex.
    
15. 
    
16. Returns Acad::eOk if successful, or Acad::eInvalidIndex if index is not valid for the polyline.
    
17. 
    

<br /> AcDbPolyline::setBulgeAt Function Acad::ErrorStatus<br /> <br /> setBulgeAt(<br /> <br /> unsigned int index,<br /> <br /> double bulge);<br /> <br /> index Input index (0 based) of the vertex <br /> bulge Input bulge value for the vertex <br /> <br /> This function sets bulge to be the bulge value for the index vertex. This will determine the bulge for the polyline segment which follows the index vertex.<br /> <br /> Returns Acad::eOk if successful, or Acad::eInvalidIndex if index is not valid for the polyline.<br /> <br />

2. 
   
3. AcDbPolyline::setPointAt Function Acad::ErrorStatus
   
4. 
   
5. setPointAt(
   
6. 
   
7. unsigned int index,
   
8. 
   
9. const AcGePoint2d& pt);
   
10. 
    
11. index Input index (0 based) of the vertex
    
12. pt Input location for the vertex
    
13. 
    
14. This sets pt (in polyline OCS coordinates) to be the location of the index vertex.
    
15. 
    

<br /> AcDbPolyline::setPointAt Function Acad::ErrorStatus<br /> <br /> setPointAt(<br /> <br /> unsigned int index,<br /> <br /> const AcGePoint2d& pt);<br /> <br /> index Input index (0 based) of the vertex <br /> pt Input location for the vertex <br /> <br /> This sets pt (in polyline OCS coordinates) to be the location of the index vertex.<br /> <br />

你看看圆心要修改到哪，然后算出正确的BULGE或者顶点位置，用上面的一个方法去做就OK了。

st788796

楼主是要改倒角半径吧

大粽子

比如說       
for (int i=0; i<numSegs; i++)
        {
                mm=pPline->segType(i);
                if (pPline->segType(i)==AcDbPolyline::kArc)
                {
                        Acad::ErrorStatus es = pPline->getArcSegAt(i, CirArc);

                        double startAng=CirArc.startAng();
                        double endAng=CirArc.endAng();       

                        AcGePoint2d ttt=CirArc.center();
                        AcGePoint2d centrepoint;
                        double r=CirArc.radius();
                        location.x=ttt.x;
                        location.y=ttt.y;
                        location.z=0.0;

                        CoorTransELLIPSOID(location,location1,iGs);
                        centrepoint.x=location1.x;
                        centrepoint.y=location1.y;
                        CirArc.setCenter(location1);
                        CirArc.setRadius(r);
                        CirArc.setAngles(startAng,endAng);
                }
这样是修改不了圆心坐标的，请高手指导

csharp

只能改 Bulge 或修改端点方法达到改变圆心的目的

XDSoft

大粽子 发表于 2014-9-22 18:46
比如說        
for (int i=0; isegType(i);
                if (pPline->segType(i)==AcDbPolyline::kArc)

你这仅仅是修改了读出来的几何实体，并没修改AcDbPolyline, 你算出新的BULGE后，用 pPLine->setBulgeAt ( inx, bulge) 去修改AcDbPolyline对象。

大粽子

这回终于明白了，谢谢:D