PV3FoamReader fix

- using a filter such as clip-plane on a multi-port source causes
  inconsistent UPDATE_TIME_STEPS() on each port. This looks like a
  VTK/Paraview bug to me.
  Workaround: check both ports and take the first one that has a value
  different than the last time set.

applications/utilities/postProcessing/graphics/PV3FoamReader/PV3FoamReader/vtkPV3FoamReader.cxx

@@ -52,8 +52,7 @@ vtkPV3FoamReader::vtkPV3FoamReader()
 
     // Add second output for the Lagrangian
     this->SetNumberOfOutputPorts(2);
-    vtkMultiBlockDataSet *lagrangian;
-    lagrangian = vtkMultiBlockDataSet::New();
+    vtkMultiBlockDataSet *lagrangian = vtkMultiBlockDataSet::New();
     lagrangian->ReleaseData();
 
     this->GetExecutive()->SetOutputData(1, lagrangian);
@@ -204,9 +203,9 @@ int vtkPV3FoamReader::RequestInformation
         );
     }
 
-    double timeRange[2];
     if (nTimeSteps)
     {
+        double timeRange[2];
         timeRange[0] = timeSteps[0];
         timeRange[1] = timeSteps[nTimeSteps-1];
 
@@ -273,19 +272,53 @@ int vtkPV3FoamReader::RequestData
         }
     }
 
-    // take port0 as the lead for other outputs
-    vtkInformation *outInfo = outputVector->GetInformationObject(0);
+    // Get the requested time step.
+    // We only support requests for a single time step
+
+    int nRequestTime = 0;
+    double requestTime[nInfo];
+
+    // taking port0 as the lead for other outputs would be nice, but fails when
+    // a filter is added - we need to check everything
+    // but since PREVIOUS_UPDATE_TIME_STEPS() is protected, relay the logic
+    // to the vtkPV3Foam::setTime() method
+    for (int infoI = 0; infoI < nInfo; ++infoI)
+    {
+        vtkInformation *outInfo = outputVector->GetInformationObject(infoI);
+
+        if
+        (
+            outInfo->Has
+            (
+                vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEPS()
+            )
+         && outInfo->Length
+            (
+                vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEPS()
+            ) >= 1
+        )
+        {
+            requestTime[nRequestTime++] = outInfo->Get
+            (
+                vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEPS()
+            )[0];
+        }
+    }
+
+    if (nRequestTime)
+    {
+        foamData_->setTime(nRequestTime, requestTime);
+    }
 
 
     vtkMultiBlockDataSet* output = vtkMultiBlockDataSet::SafeDownCast
     (
-        outInfo->Get
+        outputVector->GetInformationObject(0)->Get
         (
             vtkMultiBlockDataSet::DATA_OBJECT()
         )
     );
 
-
     vtkMultiBlockDataSet* lagrangianOutput = vtkMultiBlockDataSet::SafeDownCast
     (
         outputVector->GetInformationObject(1)->Get
@@ -294,24 +327,6 @@ int vtkPV3FoamReader::RequestData
         )
     );
 
-    if (outInfo->Has(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEPS()))
-    {
-        // Get the requested time step.
-        // We only support requests for a single time step
-        int nRequestedTimeSteps = outInfo->Length
-        (
-            vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEPS()
-        );
-        if (nRequestedTimeSteps >= 1)
-        {
-            double *requestedTimeSteps = outInfo->Get
-            (
-                vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEPS()
-            );
-
-            foamData_->setTime(requestedTimeSteps[0]);
-        }
-    }
 
     if (Foam::vtkPV3Foam::debug)
     {

applications/utilities/postProcessing/graphics/PV3FoamReader/vtkPV3Foam/vtkPV3Foam.C

@@ -90,12 +90,21 @@ void Foam::vtkPV3Foam::reduceMemory()
 
 
 
-int Foam::vtkPV3Foam::setTime(const double& requestedTime)
+int Foam::vtkPV3Foam::setTime(int nRequest, const double requestTimes[])
 {
     if (debug)
     {
-        Info<< "<beg> Foam::vtkPV3Foam::setTime(" << requestedTime << ")"
-            << endl;
+        Info<< "<beg> Foam::vtkPV3Foam::setTime(";
+        for (int requestI = 0; requestI < nRequest; ++requestI)
+        {
+            if (requestI)
+            {
+                Info<< ", ";
+            }
+
+            Info<< requestTimes[requestI];
+        }
+        Info << ") - previousIndex = " << timeIndex_ << endl;
     }
 
     Time& runTime = dbPtr_();
@@ -103,12 +112,26 @@ int Foam::vtkPV3Foam::setTime(const double& requestedTime)
     // Get times list
     instantList Times = runTime.times();
 
-    int nearestIndex = Time::findClosestTimeIndex(Times, requestedTime);
+    int nearestIndex = timeIndex_;
+
+    for (int requestI = 0; requestI < nRequest; ++requestI)
+    {
+        int index = Time::findClosestTimeIndex(Times, requestTimes[requestI]);
+
+        if (index >= 0 && index != timeIndex_)
+        {
+            nearestIndex = index;
+            break;
+        }
+    }
+
+
     if (nearestIndex < 0)
     {
         nearestIndex = 0;
     }
 
+
     // see what has changed
     if (timeIndex_ != nearestIndex)
     {
@@ -138,10 +161,11 @@ int Foam::vtkPV3Foam::setTime(const double& requestedTime)
 
     if (debug)
     {
-        Info<< "<end> Foam::vtkPV3Foam::setTime() - selected time "
-            << Times[nearestIndex].name() << " index=" << nearestIndex
-            << " meshChanged=" << meshChanged_
-            << " fieldsChanged=" << fieldsChanged_ << endl;
+        Info<< "<end> Foam::vtkPV3Foam::setTime() - selectedTime="
+            << Times[nearestIndex].name() << " index=" << timeIndex_
+            << "/" << Times.size()
+            << " meshChanged=" << Switch(meshChanged_)
+            << " fieldsChanged=" << Switch(fieldsChanged_) << endl;
     }
 
     return nearestIndex;

applications/utilities/postProcessing/graphics/PV3FoamReader/vtkPV3Foam/vtkPV3Foam.H

@@ -133,6 +133,7 @@ class vtkPV3Foam
                 return block_;
             }
 
+            //- Assign block number, return previous value
             int block(int blockNo)
             {
                 int prev = block_;
@@ -718,9 +719,11 @@ public:
         //- Remove patch names from the display
         void removePatchNames(vtkRenderer* renderer);
 
-        //- set the runTime to the requested time, returns the timeIndex
-        //  sets to "constant" on error and returns -1
-        int setTime(const double& requestedTime);
+        //- set the runTime to the first plausible request time,
+        //  returns the timeIndex
+        //  sets to "constant" on error
+        int setTime(int count, const double requestTimes[]);
+
 
         //- The current time index
         int timeIndex() const

applications/utilities/postProcessing/graphics/PV3FoamReader/vtkPV3Foam/vtkPV3FoamUpdateInfoFields.H

@@ -40,7 +40,10 @@ void Foam::vtkPV3Foam::updateInfoFields
 {
     if (debug)
     {
-        Info<< "<beg> Foam::vtkPV3Foam::updateInfoFields" << endl;
+        Info<< "<beg> Foam::vtkPV3Foam::updateInfoFields <"
+            << meshType::Mesh::typeName
+            << "> [meshPtr=" << (meshPtr_ ? "set" : "NULL") << "]"
+            << endl;
     }
 
     stringList enabledEntries;