[求助]：getSamplePoints参数toParam不起作用

hothua

我在使用getSamplePoints发现toParam不起作用,总是到曲线尾部.代码如下:

1. 
   
2.   [FONT=courier new]
   
3. //子函数,用2点将曲线分为1-3段
   
4. bool BreakPointsByTwoPoint(const AcGePolyline2d& polyline2d,const AcGePoint2d& pnt2d1, const AcGePoint2d& pnt2d2,
   
5.                                                    AcGePoint2dArray subPnt2ds[3])
   
6. {       
   
7.         double param1,param2;
   
8.         if(Adesk::kTrue!=polyline2d.isOn(pnt2d1,param1))
   
9.         {
   
10.                 acutPrintf(_T("点1:%f,%f位于线外"),pnt2d1.x,pnt2d1.y);
    
11.                 return false;
    
12.         }
    
13.         if(Adesk::kTrue!=polyline2d.isOn(pnt2d2,param2))
    
14.         {
    
15.                 acutPrintf(_T("点2:%f,%f位于线外"),pnt2d2.x,pnt2d2.y);
    
16.                 return false;
    
17.         }       
    
18.         double sparam=polyline2d.startParam();
    
19.         double eparam=polyline2d.endParam();       
    
20.         if(polyline2d.length(sparam,param1)>polyline2d.length(sparam,param2))
    
21.         {
    
22.                 double dTemp=param1;
    
23.                 param1=param2;
    
24.                 param2=dTemp;
    
25.         }
    
26.         //getSamplePoints
    
27.         acutPrintf(_T("\nBV:%f,%f,%f,%f-%f,%f,%f,%f-%f,%f"),pnt2d1.x,pnt2d1.y,param1,polyline2d.length(sparam,param1),
    
28. pnt2d2.x,pnt2d2.y,param2,polyline2d.length(sparam,param2),sparam,eparam);
    
29.         AcGeDoubleArray params1,params2,params3;
    
30.         polyline2d.getSamplePoints(sparam,params1,0.01,subPnt2ds[0],params1);
    
31.         polyline2d.getSamplePoints(param1,params2,0.01,subPnt2ds[1],params2);
    
32.         polyline2d.getSamplePoints(param2,eparam,0.01,subPnt2ds[2],params3);
    
33.         acutPrintf(_T("\n分段线点个数:%d,%d,%d-%d,%d,%d"),subPnt2ds[0].length(),subPnt2ds[1].length(),subPnt2ds[2].length(),
    
34.                 params1.length(),params2.length(),params3.length());
    
35.         return true;
    
36. }
    
37.   [/FONT]
    

复制代码

tchg

应当是这样，参数给错了吧。
//        polyline2d.getSamplePoints(sparam,params1,0.01,subPnt2ds[0],params1);
polyline2d.getSamplePoints(sparam,param1,0.01,subPnt2ds[0],params1);
//        polyline2d.getSamplePoints(param1,params2,0.01,subPnt2ds[1],params2);
polyline2d.getSamplePoints(param1,param2,0.01,subPnt2ds[1],params2);

//        polyline2d.getSamplePoints(param2,eparam,0.01,subPnt2ds[2],params3);
polyline2d.getSamplePoints(param2,eparam,0.01,subPnt2ds[2],params3);