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<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> vtkCubeSource *pCube = vtkCubeSource::New();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> pCube->SetCenter(0,0,0);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> pCube->SetXLength(2);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> pCube->SetYLength(2);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> pCube->SetZLength(2);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> vtkPolyData *data = pCube->GetOutput();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> </span><span lang=EN-US>data->Update();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> int i;<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> int cellCount = data->GetNumberOfCells();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> int pointCount = data->GetNumberOfPoints();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> vtkIdList *ptsIDList = vtkIdList::New();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> ptsIDList->Allocate(pointCount);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> for (i=0;i<pointCount;i++) {<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> ptsIDList->InsertNextId(i);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> }<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> vtkIdList
*CurrentcellPts = vtkIdList::New();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> data->GetCellPoints(0,CurrentcellPts);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> vtkIdType
ptIdinCurrentCell = CurrentcellPts->GetId(0);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> </span><span
lang=EN-US><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> vtkIdList *cellIDList =
vtkIdList::New();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> data-><b><span
style='font-weight:bold'>GetCellNeighbors</span></b>(i,ptsIDList,cellIDList);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> int ptscount =
ptsIDList->GetNumberOfIds();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'> int cellcount =
cellIDList->GetNumberOfIds();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US><o:p> </o:p></span></font></p>
<p class=MsoPlainText><i><font size=1 face=宋体><span lang=EN-US
style='font-size:9.0pt;font-style:italic'>cellcount</span></font></i><span
lang=EN-US> whould be the number of cells which is adjacent to 0 cell.But <i><span
style='font-style:italic'>cellcount</span></i> is 0. why?<o:p></o:p></span></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>-----</span>邮件原件<span lang=EN-US>-----<br>
</span>发件人<span lang=EN-US>: Dominik Szczerba [mailto:domi@vision.ee.ethz.ch] <br>
</span>发送时间<span lang=EN-US>: <st1:chsdate IsROCDate="False" IsLunarDate="False"
Day="4" Month="1" Year="2007" w:st="on">2007<span lang=EN-US><span lang=EN-US>年1</span></span><span
lang=EN-US><span lang=EN-US>月4</span></span><span lang=EN-US><span lang=EN-US>日</span></span></st1:chsdate>
18:48<br>
</span>收件人<span lang=EN-US>: vtkusers@vtk.org<br>
</span>抄送<span lang=EN-US>: PAUL<br>
</span>主题<span lang=EN-US>: Re: </span>答复<span lang=EN-US>: [vtkusers] the
adjacent vertex</span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>On a second thought the below will not capture all the connected points<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>directly, only at a cell. But you can achieve what you want by combining<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>it with GetCellNeighbours.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>Another way is to first walk the cells maping them to their points (e,g.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>using std::map) and then walk the points retreiving the cells and their<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>points. Rejecting duplicates you get what you are after.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>-DS<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>Dominik Szczerba wrote:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>> You can locate the cell containing the point of interest and call<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>> GetCellPoints().<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>> DS<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>> PAUL wrote:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> Hello all:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> I have been baffled the question for a long time.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> I am studying an algorithm of judging convex or non-convex
polyhedron.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> If every vertex is above the plane which
contain three vertexes<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> adjacent to the vertex, the polyhedron is convex .<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> For an example, there are eight vertexes on a cube. And each
vertex is<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> adjacent to three other vertexes.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> My question is:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> When an arbitrary vertex is accessed, how to know the other
three<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> vertexes</span></font><font face="Courier New"><span
lang=EN-US style='font-family:"Courier New"'>’</span></font><span lang=EN-US>
coordinate?<o:p></o:p></span></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> I need your helps! Thank you!!<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>>
------------------------------------------------------------------------<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> *</span>发件人<span lang=EN-US>:* vtkusers-bounces+polinzhuo=163.com@vtk.org<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> [mailto:vtkusers-bounces+polinzhuo=163.com@vtk.org] *</span>代表<span
lang=EN-US> *PAUL<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> *</span>发送时间<span lang=EN-US>:* <st1:chsdate IsROCDate="False"
IsLunarDate="False" Day="4" Month="1" Year="2007" w:st="on">2007<span
lang=EN-US><span lang=EN-US>年1</span></span><span lang=EN-US><span lang=EN-US>月4</span></span><span
lang=EN-US><span lang=EN-US>日</span></span></st1:chsdate> 13:44<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> *</span>收件人<span lang=EN-US>:* vtkusers@vtk.org<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> *</span>主题<span lang=EN-US>:* [vtkusers] the adjacent vertex<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> Hi,all:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> There is an arbitrary vertex on a polyhedron. How to find the
other<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> three vertexes which are adjacent to the vertex?<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> Paul<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>>
------------------------------------------------------------------------<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> _______________________________________________<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> This is the private VTK discussion list. <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> Please keep messages on-topic. Check the FAQ at:
http://www.vtk.org/Wiki/VTK_FAQ<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> Follow this link to subscribe/unsubscribe:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>>> http://www.vtk.org/mailman/listinfo/vtkusers<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>> _______________________________________________<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>> This is the private VTK discussion list. <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>> Please keep messages on-topic. Check the FAQ at:
http://www.vtk.org/Wiki/VTK_FAQ<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>> Follow this link to subscribe/unsubscribe:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=1 face=宋体><span lang=EN-US style='font-size:
9.0pt'>> http://www.vtk.org/mailman/listinfo/vtkusers<o:p></o:p></span></font></p>
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