Initial revision

include/HedgeHog.hh

+/*=========================================================================
+
+  Program:   Visualization Library
+  Module:    HedgeHog.hh
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+Description:
+---------------------------------------------------------------------------
+This file is part of the Visualization Library. No part of this file
+or its contents may be copied, reproduced or altered in any way
+without the express written consent of the authors.
+
+Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen 1993, 1994 
+
+=========================================================================*/
+//
+// Creates oriented lines directed along vector
+//
+#ifndef __vlHedgeHog_h
+#define __vlHedgeHog_h
+
+#include "DS2PolyF.hh"
+
+class vlHedgeHog : public vlDataSetToPolyFilter
+{
+public:
+  vlHedgeHog() : ScaleFactor(1.0) {};
+  ~vlHedgeHog() {};
+  char *GetClassName() {return "vlHedgeHog";};
+  void PrintSelf(ostream& os, vlIndent indent);
+
+  vlSetMacro(ScaleFactor,float);
+  vlGetMacro(ScaleFactor,float);
+
+protected:
+  void Execute();
+  float ScaleFactor;
+
+};
+
+#endif
+
+

src/HedgeHog.cc

+/*=========================================================================
+
+  Program:   Visualization Library
+  Module:    HedgeHog.cc
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+Description:
+---------------------------------------------------------------------------
+This file is part of the Visualization Library. No part of this file
+or its contents may be copied, reproduced or altered in any way
+without the express written consent of the authors.
+
+Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen 1993, 1994 
+
+=========================================================================*/
+#include "HedgeHog.hh"
+
+void vlHedgeHog::Execute()
+{
+  vlPoints *inPts;
+  int numPts;
+  vlFloatPoints *newPts;
+  vlPointData *pd;
+  vlVectors *inVectors;
+  int i, ptId, pts[2];
+  vlCellArray *newLines;
+  float *x, *v;
+  float newX[3];
+//
+// Initialize
+//
+  this->Initialize();
+
+  numPts = this->Input->GetNumberOfPoints();
+  inVectors = pd->GetVectors();
+  if ( !inVectors || numPts < 1 )
+    {
+    vlErrorMacro(<<"No input data");
+    return;
+    }
+  pd = this->Input->GetPointData();
+  this->PointData.CopyAllocate(pd, 2*numPts);
+
+  newPts = new vlFloatPoints(2*numPts);
+  newLines = new vlCellArray;
+  newLines->Allocate(newLines->EstimateSize(numPts,2));
+//
+// Loop over all points, creating oriented line
+//
+  for (ptId=0; ptId < numPts; ptId++)
+    {
+    x = inPts->GetPoint(ptId);
+    v = inVectors->GetVector(ptId);
+    for (i=0; i<3; i++)
+      {
+      newX[i] = x[i] + this->ScaleFactor * v[i];
+      }
+
+    pts[0] = ptId;
+    pts[1] = ptId + numPts;;
+
+    newPts->SetPoint(pts[0], x);
+    newPts->SetPoint(pts[1], newX);
+
+    newLines->InsertNextCell(2,pts);
+
+    this->PointData.CopyData(pd,ptId,pts[0]);
+    this->PointData.CopyData(pd,ptId,pts[1]);
+    }
+//
+// Update ourselves
+//
+  this->SetPoints(newPts);
+  this->SetLines(newLines);
+}
+
+void vlHedgeHog::PrintSelf(ostream& os, vlIndent indent)
+{
+  if (this->ShouldIPrint(vlHedgeHog::GetClassName()))
+    {
+    vlDataSetToPolyFilter::PrintSelf(os,indent);
+
+    os << indent << "Scale Factor: " << this->ScaleFactor << "\n";
+    }
+}