[讨论]：AcGeInterval类的用途

yinjian68

我看了所有关于这个AcGeInterval类的贴子，也做了大量的代码测试怎么越来越感觉AcGeInterval类仅仅只是进行了简单的
数据比较来做并~合~差运算，它只是对重合的AcGeCurve对象进行的运算吗,如果是那么这个类的存在就没那么重要了。

论坛上的以前关于这个类的讨论都是无果而终的.

热烈期待晓东能够跟贴

DARCY

不太常用。

牢固

AcGeInterval类难道是AutoCAD公司和我们开了一个玩笑？

1. static void XLRXAPI_IntVal(void)
   
2. {
   
3.   Acad::ErrorStatus es;
   
4.   ads_name e1,e2;
   
5.   ads_point p1,p2;
   
6.   AcDbEntity *pEnt1,*pEnt2;
   
7.   AcDbObjectId Id1,Id2;
   
8.   AcDbCurve *pDbCurve1,*pDbCurve2;
   
9.   AcGeCurve2d *pGeCurve1,*pGeCurve2;
   
10.   AcGeInterval GeIntVal1,GeIntVal2,GeIntVal3;
    
11.   double lower1,upper1,lower2,upper2,lower3,upper3;
    
12.   int rc = acedEntSel(_T("\n第一条曲线:"),e1,p1);
    
13.   if (rc != RTNORM)
    
14.   {
    
15.     return;
    
16.   }
    
17.   acdbGetObjectId(Id1,e1);
    
18.   es = acdbOpenObject(pEnt1,Id1,AcDb::kForRead);
    
19.   if (es != Acad::eOk)
    
20.   {
    
21.     return;
    
22.   }
    
23.   if (!pEnt1->isKindOf(AcDbCurve::desc()))
    
24.   {
    
25.     pEnt1->close();
    
26.     return;
    
27.   }
    
28.   pDbCurve1 = AcDbCurve::cast(pEnt1);
    
29.   rc = acedEntSel(_T("\n第二条曲线:"),e2,p2);
    
30.   if (rc != RTNORM)
    
31.   {
    
32.     return;
    
33.   }
    
34.   acdbGetObjectId(Id2,e2);
    
35.   es = acdbOpenObject(pEnt2,Id2,AcDb::kForRead);
    
36.   if (es != Acad::eOk)
    
37.   {
    
38.     pEnt1->close();
    
39.     return;
    
40.   }
    
41.   if (!pEnt2->isKindOf(AcDbCurve::desc()))
    
42.   {
    
43.     pEnt1->close();
    
44.     pEnt2->close();
    
45.     return;
    
46.   }
    
47.   pDbCurve2 = AcDbCurve::cast(pEnt2);
    
48.   es = CCurve::AcDbCurveToAcGeCurve(pGeCurve1,pDbCurve1);
    
49.   if (es != Acad::eOk)
    
50.   {
    
51.     pEnt1->close();
    
52.     pEnt2->close();
    
53.     return;
    
54.   }
    
55.   CCurve::AcDbCurveToAcGeCurve(pGeCurve2,pDbCurve2);
    
56.   if (es != Acad::eOk)
    
57.   {
    
58.     delete pGeCurve1;
    
59.     pEnt1->close();
    
60.     pEnt2->close();
    
61.     return;
    
62.   }
    
63.   AcDbCurve *pC1,*pC2;
    
64.   if (Acad::eOk == CCurve::AcGeCurveToAcDbCurve(pC1,pGeCurve1))
    
65.   {
    
66.     pC1->setColorIndex(1);
    
67.     CCreateEnt::PostToSpace(pC1);
    
68.   }
    
69.   if (Acad::eOk == CCurve::AcGeCurveToAcDbCurve(pC2,pGeCurve2)){
    
70.     pC2->setColorIndex(2);
    
71.     CCreateEnt::PostToSpace(pC2);
    
72.   }
    
73.   pGeCurve1->getInterval(GeIntVal1);
    
74.   GeIntVal1.getBounds(lower1,upper1);
    
75.   pGeCurve2->getInterval(GeIntVal2);
    
76.   GeIntVal2.getBounds(lower2,upper2);
    
77.   acutPrintf(_T("\n曲线1：lower = %0.3f, upper = %0.3f length = %0.3f 曲线2：lower = %0.3f, upper = %0.3f length = %0.3f "),
    
78.     lower1,upper1,GeIntVal1.length(),lower2,upper2,GeIntVal2.length());
    
79.   if (GeIntVal1.isDisjoint(GeIntVal2))
    
80.   {
    
81.     acutPrintf(_T("\n两曲线不相交!"));
    
82.     pEnt1->close();
    
83.     pEnt2->close();
    
84.     delete pGeCurve1;
    
85.     delete pGeCurve2;
    
86.     return;
    
87.   }
    
88.   if (GeIntVal1.intersectWith(GeIntVal2,GeIntVal3))
    
89.   {
    
90.     GeIntVal3.getBounds(lower3,upper3);
    
91.     acutPrintf(_T("\n相交后曲线：lower = %0.3f, upper = %0.3f  length = %0.3f "),GeIntVal3.lowerBound(),GeIntVal3.upperBound(),GeIntVal3.length());
    
92.   }
    
93.   
    
94.   pEnt1->close();
    
95.   pEnt2->close();
    
96.   delete pGeCurve1;
    
97.   delete pGeCurve2;
    
98.   return;
    
99. }

static void XLRXAPI_IntVal(void)<br /> {<br />   Acad::ErrorStatus es;<br />   ads_name e1,e2;<br />   ads_point p1,p2;<br />   AcDbEntity *pEnt1,*pEnt2;<br />   AcDbObjectId Id1,Id2;<br />   AcDbCurve *pDbCurve1,*pDbCurve2;<br />   AcGeCurve2d *pGeCurve1,*pGeCurve2;<br />   AcGeInterval GeIntVal1,GeIntVal2,GeIntVal3;<br />   double lower1,upper1,lower2,upper2,lower3,upper3;<br />   int rc = acedEntSel(_T("\n第一条曲线:"),e1,p1);<br />   if (rc != RTNORM)<br />   {<br />     return;<br />   }<br />   acdbGetObjectId(Id1,e1);<br />   es = acdbOpenObject(pEnt1,Id1,AcDb::kForRead);<br />   if (es != Acad::eOk)<br />   {<br />     return;<br />   }<br />   if (!pEnt1->isKindOf(AcDbCurve::desc()))<br />   {<br />     pEnt1->close();<br />     return;<br />   }<br />   pDbCurve1 = AcDbCurve::cast(pEnt1);<br />   rc = acedEntSel(_T("\n第二条曲线:"),e2,p2);<br />   if (rc != RTNORM)<br />   {<br />     return;<br />   }<br />   acdbGetObjectId(Id2,e2);<br />   es = acdbOpenObject(pEnt2,Id2,AcDb::kForRead);<br />   if (es != Acad::eOk)<br />   {<br />     pEnt1->close();<br />     return;<br />   }<br />   if (!pEnt2->isKindOf(AcDbCurve::desc()))<br />   {<br />     pEnt1->close();<br />     pEnt2->close();<br />     return;<br />   }<br />   pDbCurve2 = AcDbCurve::cast(pEnt2);<br />   es = CCurve::AcDbCurveToAcGeCurve(pGeCurve1,pDbCurve1);<br />   if (es != Acad::eOk)<br />   {<br />     pEnt1->close();<br />     pEnt2->close();<br />     return;<br />   }<br />   CCurve::AcDbCurveToAcGeCurve(pGeCurve2,pDbCurve2);<br />   if (es != Acad::eOk)<br />   {<br />     delete pGeCurve1;<br />     pEnt1->close();<br />     pEnt2->close();<br />     return;<br />   }<br />   AcDbCurve *pC1,*pC2;<br />   if (Acad::eOk == CCurve::AcGeCurveToAcDbCurve(pC1,pGeCurve1))<br />   {<br />     pC1->setColorIndex(1);<br />     CCreateEnt::PostToSpace(pC1);<br />   }<br />   if (Acad::eOk == CCurve::AcGeCurveToAcDbCurve(pC2,pGeCurve2)){<br />     pC2->setColorIndex(2);<br />     CCreateEnt::PostToSpace(pC2);<br />   }<br />   pGeCurve1->getInterval(GeIntVal1);<br />   GeIntVal1.getBounds(lower1,upper1);<br />   pGeCurve2->getInterval(GeIntVal2);<br />   GeIntVal2.getBounds(lower2,upper2);<br />   acutPrintf(_T("\n曲线1：lower = %0.3f, upper = %0.3f length = %0.3f 曲线2：lower = %0.3f, upper = %0.3f length = %0.3f "),<br />     lower1,upper1,GeIntVal1.length(),lower2,upper2,GeIntVal2.length());<br />   if (GeIntVal1.isDisjoint(GeIntVal2))<br />   {<br />     acutPrintf(_T("\n两曲线不相交!"));<br />     pEnt1->close();<br />     pEnt2->close();<br />     delete pGeCurve1;<br />     delete pGeCurve2;<br />     return;<br />   }<br />   if (GeIntVal1.intersectWith(GeIntVal2,GeIntVal3))<br />   {<br />     GeIntVal3.getBounds(lower3,upper3);<br />     acutPrintf(_T("\n相交后曲线：lower = %0.3f, upper = %0.3f  length = %0.3f "),GeIntVal3.lowerBound(),GeIntVal3.upperBound(),GeIntVal3.length());<br />   }<br />   <br />   pEnt1->close();<br />   pEnt2->close();<br />   delete pGeCurve1;<br />   delete pGeCurve2;<br />   return;<br /> }

命令: intval
第一条曲线:
第二条曲线:
曲线1：lower = 0.000, upper = 1321.959 length = 1321.959 曲线2：lower = 0.000, upper
= 1042.697 length = 1042.697
相交后曲线：lower = 0.000, upper = 1042.697  length = 1042.697
命令:
没有效果！

革天明

牢固 发表于 2014-6-9 16:54
AcGeInterval类难道是AutoCAD公司和我们开了一个玩笑？

解决了吗？应该如何使用？