[Paraview-developers] Plugin client/server

[Utkarsh Ayachit]

An alternative to what John suggests:

double bounds[6];
input->GetBounds(bounds);

vtkMultiProcessController* controller =
vtkMultiProcessController::GetGlobalController();
if (controller && controller->GetNumberOfProcesses() > 1)
  {
  double bmin[3], bmn[3] = {bounds[0], bounds[2], bounds[4]};
  double bmax[3], bmx[3] = {bounds[1], bounds[3], bounds[5]};
  controller->AllReduce(bmn, bmin, 3,  vtkCommunicator::MIN_OP);
  controller->AllReduce(bmx, bmax, 3, vtkCommunicator::MAX_OP);
  bounds [0] = bmin[0];
  bounds [2] = bmin[1];
  bounds [4] = bmin[3];
  bounds [1] = bmax[0];
  bounds [3] = bmax[1];
  bounds [4] = bmax[3];
  }

Utkarsh

On Wed, Jul 27, 2011 at 1:11 AM, Biddiscombe, John A. <biddisco at cscs.ch> wrote:
> I believe that the client does collect boxes from all nodes and generate the
> information you need, but on the servers ... if my filters require the
> global bounds, I use this.
>
>
>
> #ifdef VTK_USE_MPI
>
>   vtkMPICommunicator *communicator =
> vtkMPICommunicator::SafeDownCast(this->Controller->GetCommunicator());
>
>   MPI_Comm mpiComm = MPI_COMM_NULL;
>
>   if (communicator) {
>
>     mpiComm = *(communicator->GetMPIComm()->GetHandle());
>
>   }
>
>
>
> ...
>
>
>
>   double bounds[6];
>
>   input->GetBounds(bounds);
>
>   double bmin[3], bmn[3] = {bounds[0], bounds[2], bounds[4]};
>
>   double bmax[3], bmx[3] = {bounds[1], bounds[3], bounds[5]};
>
>   MPI_Allreduce(bmn, bmin, 3, MPI_DOUBLE, MPI_MIN, mpiComm);
>
>   MPI_Allreduce(bmx, bmax, 3, MPI_DOUBLE, MPI_MAX, mpiComm);
>
>
>
> Cut’n’pasted with some extra code removed. Apologies if I deleted the wrong
> lines
>
>
>
> JB
>
>
>
>
>
>
>
> From: paraview-developers-bounces at paraview.org
> [mailto:paraview-developers-bounces at paraview.org] On Behalf Of Scott, W Alan
> Sent: 27 July 2011 03:56
> To: paraview-developers at paraview.org
> Subject: [Paraview-developers] Plugin client/server
>
>
>
> I have written a filter that runs client/ multiple remote server.  This
> filter works correctly, from what I can see.  (It just replicates a dataset,
> in order to create a larger dataset in memory for testing and benching.)
>
>
>
> I am trying to convert this filter to a plugin.  It works local server, but
> fails client/ remote server.  I believe that my problem is that I am trying
> to calculate the geometric bounds of the dataset, and each of the processors
> is returning a different bounding box – representing the bounding box of
> this server’s data.  What I want is the bounding box of all server’s data.
> I am using a vtkDataSet function called GetBounds.
>
>
>
> My questions are as follows:
>
> ·         Is there an example of how to make plugins that work for remote
> servers, that calculate the bounds of all of the data, for all processors?
>
> ·         If not, is there anywhere that I should look for ldeas?
>
> ·         If not, is there someone I should talk to?
>
>
>
> Thanks,
>
>
>
> Alan
>
>
>
>
>
> --------------------------------------------------------
>
> W. Alan Scott
>
> ParaView Support Manager
>
>
>
> GAITS
>
> Sandia National Laboratories, MS 0822
>
> Org 9326 - Building 880 A1-C
>
> (505) 284-0932   FAX (505) 845-0833
>
> ---------------------------------------------------------
>
>
>
>
>
>
>
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