[vtkusers] About variable length vtkCellArray

[Andy Bauer]

Your code looks to be incomplete or wrong. Your p variable isn't assigned
any dynamic memory.

On Fri, Nov 21, 2014 at 11:34 AM, Feng Chao <fengc at student.ethz.ch> wrote:

>   Dear All,
>
> I am new to VTK. I want to visualize polyhedrons. However in my
> polyhedrons the number of faces and number of nodes in each face is not
> known at compile time. Thus if I use vtkCellArray it gave me error message
> "variable length array "XX" is used". I figured out a solution like this,
>
> vtkIdType* p;
> for(int i=0;i<num;i++)
> {
>     *p=sth;
>     p++
> }
> for(int i=0;i<num;i++)
> {
>     p--;
> }
>
> and it works very well on my test code. Unfortunately I am working with a
> software using PETSc library and assign dynamic memory this way gives me
> some PETSc errors. I wonder on VTK side do you have better solution for
> variable length array like this? For example some class like
> vtkCellStandardVector to support std::vector of c++?
>
> Thank you!
>
>    Best,
> Chao
>
>  ------------------------------
>  Chao Feng (冯超)
>
>  Master student in Computational Biology & Bioinformatics
> ETH Zürich, Zuerich
> Switzerland
>
>  Iber Group, Department of Biosystems Science and Engineering,
> ETH Zürich, Basel
> Switzerland
>
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