答复: [vtkusers] the adjacent vertex

[Dominik Szczerba]

On a second thought the below will not capture all the connected points
directly, only at a cell. But you can achieve what you want by combining
it with GetCellNeighbours.
Another way is to first walk the cells maping them to their points (e,g.
using std::map) and then walk the points retreiving the cells and their
points. Rejecting duplicates you get what you are after.
-DS

Dominik Szczerba wrote:
> You can locate the cell containing the point of interest and call
> GetCellPoints().
> DS
> 
> PAUL wrote:
>> Hello all:
>>
>> I have been baffled the question for a long time.
>>
>> I am studying an algorithm of judging convex or non-convex polyhedron.
>>
>> If  every  vertex  is above the plane which contain three vertexes
>> adjacent to the vertex, the polyhedron is convex .
>>
>> For an example, there are eight vertexes on a cube. And each vertex is
>> adjacent to three other vertexes.
>>
>> My question is:
>>
>> When an arbitrary vertex is accessed, how to know the other three
>> vertexes’ coordinate?
>>
>>  
>>
>> I need your helps! Thank you!!
>>
>>  
>>
>>  
>>
>> ------------------------------------------------------------------------
>>
>> *发件人:* vtkusers-bounces+polinzhuo=163.com at vtk.org
>> [mailto:vtkusers-bounces+polinzhuo=163.com at vtk.org] *代表 *PAUL
>> *发送时间:* 2007年1月4日 13:44
>> *收件人:* vtkusers at vtk.org
>> *主题:* [vtkusers] the adjacent vertex
>>
>>  
>>
>> Hi,all:
>>
>> There is an arbitrary vertex on a polyhedron. How to find the other
>> three vertexes which are adjacent to the vertex?
>>
>> Paul
>>
>>  
>>
>>
>> ------------------------------------------------------------------------
>>
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