AcDbFace面域问题？？？？？？

dipenghao · 发表于 2004-10-1 20:49:00

我问过这个问题了，但是还不明白。请版主帮忙解释一下：
一下是我的做法，不知道为什么求不出面积。
AcGePoint3d pA(0,0,0),pB(100,0,0),pC(100,100,0),pD(0,100,0);
AcDbFace *pFace=new AcDbFace(pA,pB,pC,pD);
postToDatabase(pFace,faceId);
ads_point pt1,pt2,pt;
AcGePoint2dArray point_Array;
int stat=1;
   stat=acedGetPoint(NULL,"选择点(ESC结束)\n",pt1);
   if(stat==RTCAN)
   return;
   point_Array.append(asPnt2d(pt1));
   while(1)
   {
   acdbPointSet(pt1, pt2);
   = acedGetPoint(pick, "选择下一点(ESC-quit): ", pick);
   stat=acedGetPoint(pt1,"选择点,(ESC结束)\n",pt1);
   acedGrDraw(pt2, pt1, 1, 0);
   if(stat==RTCAN)
   break;
   point_Array.append(asPnt2d(pt1));
   }
   AcDbPolyline *ClosePolyline=new AcDbPolyline();
   for(int i=0;iaddVertexAt(i,pTmp,0,-1,-1);
   }
   ClosePolyline->setColorIndex(1);
   ClosePolyline->setClosed(Adesk::kTrue);
   postToDatabase(ClosePolyline,IdObj);
   acdbOpenAcDbEntity(pEnt,IdObj,AcDb::kForRead);
   AcDbPolyline *pPoly=AcDbPolyline::cast(pEnt);
AcDbVoidPtrArray entities,regions;
   entities.append(pFace);
   entities.append(pPoly);
   AcDbRegion::createFromCurves(entities, regions);
   if (regions.length() booleanOper(AcDb::kBoolIntersect,(AcDbRegion*)    regions))
   acutPrintf("有问题\n");
   delete (AcRxObject*)regions;

   }
        double regArea;
   pReg->getArea(regArea);
   pReg->close();
   acutPrintf("area=%0.3f\n",regArea);
请高手指出错误。
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王咣生 · 发表于 2004-10-1 22:08:00

能贴出你完整的代码吗?
没做过,只能帮你调试一下了.

dipenghao · 发表于 2004-10-1 22:27:00

上面基本的程序放到一个函数里面即可。
版主可以看看帖子，
告诉我做法了，但是我没有求出结果。
基本思想。就是两个实体（闭合的）然后求出图形交集部分的面积

王咣生 · 发表于 2004-10-1 22:54:00

这里    file://stat = acedGetPoint(pick, "选择下一点(ESC-quit): ", pick);
   stat=acedGetPoint(pt1,"选择点,(ESC结束)\n",pt1);
是什么?    file:这一行需要吗?
postToDatabase也是未声明的?
很多未声明的标识符!

dipenghao · 发表于 2004-10-1 23:02:00

那是注释掉得语句。粘贴到帖子上就加了file。不要。
postToDatabase()是把该实体添加到图形数据库中

王咣生 · 发表于 2004-10-1 23:10:00

没法调试, 这段代码中很多变量都是没有声明的. postToDatabase
IdObj
pEnt
pRegion
pReg
...
因为我没做过,所以看不出应该怎么改.
postToDatabase是个自定义的函数
Acad::ErrorStatus postToDatabase(AcDbEntity* ent, AcDbObjectId& objId)
{
   //    Given an entity, this function will post it to the database
   //    in MODEL_SPACE and then return the objectId;    returns eOk if
   //    all went well.

   Acad::ErrorStatus    es;
   AcDbBlockTable* pBlockTable;
   AcDbBlockTableRecord*    pSpaceRecord;

   es = acdbHostApplicationServices()->workingDatabase()
   ->getSymbolTable(pBlockTable, AcDb::kForRead);
   assert(es == Acad::eOk);

   es = pBlockTable->getAt(ACDB_MODEL_SPACE, pSpaceRecord, AcDb::kForWrite);
   assert(es == Acad::eOk);

   es = pBlockTable->close();
   assert(es == Acad::eOk);

   es = pSpaceRecord->appendAcDbEntity(objId, ent);
   assert(es == Acad::eOk);

   es = ent->close();
   assert(es == Acad::eOk);

   es = pSpaceRecord->close();
   assert(es == Acad::eOk);

   return es;
}

dipenghao · 发表于 2004-10-1 23:30:00

不好意思。我再发一次
void AppmytoolCloReg()
{
   ads_point pt1,pt2,pt;
   AcGePoint2dArray point_Array;
   AcDbObjectId IdObj,faceId;
   AcDbEntity *pEnt=NULL;
   AcGePoint3d pA(0,0,0),pB(100,0,0),pC(100,100,0),pD(0,100,0);
   AcDbFace *pFace=new AcDbFace(pA,pB,pC,pD);
   postToDatabase(pFace,faceId);
   int stat=1;
   stat=acedGetPoint(NULL,"选择点(ESC结束)\n",pt1);
   if(stat==RTCAN)
   return;
   point_Array.append(asPnt2d(pt1));
   while(1)
   {
   acdbPointSet(pt1, pt2);
   stat=acedGetPoint(pt1,"选择点,(ESC结束)\n",pt1);
   acedGrDraw(pt2, pt1, 1, 0);
   if(stat==RTCAN)
   break;
   point_Array.append(asPnt2d(pt1));
   }
   AcDbPolyline *ClosePolyline=new AcDbPolyline();
   for(int i=0;iaddVertexAt(i,pTmp,0,-1,-1);
   }
   ClosePolyline->setColorIndex(1);
   ClosePolyline->setClosed(Adesk::kTrue);
   postToDatabase(ClosePolyline,IdObj);//添加实体数据库中
   acdbOpenAcDbEntity(pEnt,IdObj,AcDb::kForRead);
AcDbPolyline *pPoly=AcDbPolyline::cast(pEnt);
   AcDbVoidPtrArray entities,regions;
   entities.append(pFace);
   entities.append(pPoly);
   AcDbRegion::createFromCurves(entities, regions);
   if (regions.length() booleanOper(AcDb::kBoolIntersect,(AcDbRegion*)regions[i]))
   acutPrintf("有问题\n");
   delete (AcRxObject*)regions[i];

   }
        double regArea;
   pRegion->getArea(regArea);
   pRegion->close();
pEnt->close();
   acutPrintf("area=%0.3f\n",regArea);
}
Acad::ErrorStatus
postToDatabase(/*[in]*/AcDbEntity* pEnt,/*[out]*/AcDbObjectId& idObj)
{
Acad::ErrorStatus    es;
AcDbBlockTable* pBlockTable;
AcDbBlockTableRecord*    pSpaceRecord;

   if (acdbHostApplicationServices()->workingDatabase()==NULL)
   return Acad::eNoDatabase;

   if ((es = acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBlockTable, AcDb::kForRead))==Acad::eOk){

   if ((es = pBlockTable->getAt(ACDB_MODEL_SPACE, pSpaceRecord, AcDb::kForWrite))==Acad::eOk){

   if ((es = pSpaceRecord->appendAcDbEntity(idObj, pEnt))==Acad::eOk)
   pEnt->close();
   pSpaceRecord->close();
   }
pBlockTable->close();
   }
return es;
}

hchdown · 发表于 2008-9-22 17:39:00

先求交点,再创建一个新的面或多线段,面积就出来了

AcDbFace面域问题？？？？？？

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