Changes between Initial Version and Version 1 of cypress/Example VTK-C++

Timestamp:

08/20/15 20:25:05 (10 years ago)

Author:

fuji

Comment:

—

cypress/Example VTK-C++

@@ +1 @@
+{{{#!c++
+// VTK Structured Grid Sample
+//
+// Created on Sun Mar 23 11:17:34 2014
+//
+//
+#include <iostream>
+#include <fstream>
+#include <vtkXMLStructuredGridWriter.h>
+#include <vtkStructuredGrid.h>
+#include <vtkDataSet.h>
+#include <vtkPointData.h>
+#include <vtkCellData.h>
+#include <vtkCellArray.h>
+#include <vtkDoubleArray.h>
+
+int main(int argc, char **argv) {
+        // Declare "ifsteam" class object
+        ifstream ifile;
+
+        // Open a file with read-mode (default) "open" is a member function of "ifstream"
+        ifile.open("officeFlow.txt");
+        // Check if file exists
+        if (ifile.fail()) {
+                std::cout << "file not found" << endl;
+                return 0;
+        }
+
+        // Reading data from the file. ">>" is a operator of "ifstream"
+        int nx, ny, nz;
+        ifile >> nx >> ny >> nz;
+
+        // setup VTK
+        vtkXMLStructuredGridWriter *writer = vtkXMLStructuredGridWriter::New();
+        vtkStructuredGrid *structured_grid = vtkStructuredGrid::New();
+        structured_grid->SetDimensions(nx, ny, nz);
+        vtkPoints *nodes = vtkPoints::New();
+        nodes->Allocate(nx * ny * nz);
+        vtkDoubleArray* prsArray = vtkDoubleArray::New();
+        prsArray->SetNumberOfComponents(1);
+        prsArray->SetName("Pressure");
+        vtkDoubleArray* velArray = vtkDoubleArray::New();
+        velArray->SetNumberOfComponents(3);
+        velArray->SetName("Velocity");
+
+        for (int k = 0; k < nz; k++) {
+                for (int j = 0; j < ny; j++) {
+                        for (int i = 0; i < nx; i++) {
+                                double x, y, z, u, v, w, p;
+                                ifile >> x >> y >> z >> u >> v >> w >> p;
+
+                                nodes->InsertNextPoint(x, y, z);
+                                prsArray->InsertNextTuple(&p);
+                                velArray->InsertNextTuple3(u, v, w);
+                        }
+                }
+        }
+        // close file
+        ifile.close();
+
+        structured_grid->SetPoints(nodes);
+        structured_grid->GetPointData()->AddArray(velArray);
+        structured_grid->GetPointData()->AddArray(prsArray);
+
+#if (VTK_MAJOR_VERSION >=6)
+        writer->SetInputData(structured_grid);
+#else
+        writer->SetInput(structured_grid);
+#endif
+
+        writer->SetFileName("officeFlow.vts");
+        writer->SetDataModeToAscii();
+        writer->Write();
+
+        structured_grid->Delete();
+        writer->Delete();
+        nodes->Delete();
+        velArray->Delete();
+        prsArray->Delete();
+}
+}}}