[每日一码] 求Line和Su**ce的交点
下面是示例代码，求端点是(0 0 0) (0 0 1)的LINE和Su**ce的交点。注意：include和lib文件在ObjectARX SDK\\utils\brep 目录下。static AcGePoint3dArray Intersect(AcDbSu**ce* pSu**ce,AcGeLine3d line)
{
AcGePoint3dArray returnPtArray;
AcDbBody* pBody = new AcDbBody();
// 2013
// Acad::ErrorStatus es = pBody->setASMBody(pSu**ce->ASMBodyCopy());
//before 20123
Acad::ErrorStatus es = pBody->setBody(pSu**ce->body());
//build AcBrBrep
AcBrBrep* pBrep = new AcBrBrep();
//
if(AcBr::eOk == pBrep->set(*pBody))
{
AcBrBrepFaceTraverser* pFaceTrav = new AcBrBrepFaceTraverser;
if(AcBr::eOk == pFaceTrav->setBrep(*pBrep))
{
for(pFaceTrav->restart();!pFaceTrav->done();pFaceTrav->next())
{
AcB**ce face;
if(AcBr::eOk == pFaceTrav->getFace(face))
{
double area = 0.0f;
face.getSu**ceArea(area);
acutPrintf(L"\nSu**ce Area: %f", area);
//*****whole su**ce of the Brep face******
//AcGeNurbSu**ce nurbSu**ce;
//face.getSu**ceAsNurb(nurbSu**ce);
//AcGeCurveSurfInt curveSI;
////input the curve and line
//curveSI.set(line,nurbSu**ce);
////get the count of intersect points
//int count = curveSI.numIntPoints(err采用1);
// if(err采用1 == AcGe::kXXOk && count >0 )
// {
// AcGeIntersectError err采用2;
// for(int index = 0 ;index < count; index ++)
// {
// AcGePoint3d pt =
// curveSI.intPoint(index,err采用2);
// returnPtArray.append(pt);
// }
//
// }
//**********
//****real su**ce of the orignal AcDbSu**ce
AcGeExternalBoundedSu**ce** nurbs = NULL;
Adesk::UInt32 numNurbs = 0;
face.getSu**ceAsTrimmedNurbs(numNurbs,nurbs);
//*****
for (Adesk::UInt32 i = 0; i < numNurbs; i++)
{
AcGeCurveSurfInt curveSI;
AcGeIntersectErrorerr采用1 = AcGe::kXXOk;
//input the curve and line
curveSI.set(line,*nurbs<i>);
//get the count of intersect points
int count = curveSI.numIntPoints(err采用1);
if(err采用1 == AcGe::kXXOk && count >0 )
{
AcGeIntersectError err采用2;
for(int index = 0 ;index < count; index ++)
{
AcGePoint3d pt =
curveSI.intPoint(index,err采用2);
returnPtArray.append(pt);
}
}
delete nurbs<i>;
}
// your responsibility to delete the
// array of su**ces
delete[] nurbs;
}
}
}
delete pFaceTrav;
}
delete pBrep;
return returnPtArray;
}
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