VTK Learning Nineteen - RectilinearGrid Visualization

VTK Learning Nineteen - RectilinearGrid Visualization

Description

可視化規則不等間距網格

Code

#include <vtkSmartPointer.h>
#include <vtkPoints.h>
#include <vtkRectilinearGrid.h>
#include <vtkMath.h>
#include <vtkDataSetMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkShrinkFilter.h>
#include <vtkDoubleArray.h>
#include <vtkFloatArray.h>
#include <vtkPointData.h>

int main(int, char *[])
{
  // Create a grid
  vtkSmartPointer<vtkRectilinearGrid> grid = 
    vtkSmartPointer<vtkRectilinearGrid>::New();

  grid->SetDimensions(2,3,2);

  vtkSmartPointer<vtkDoubleArray> xArray = 
    vtkSmartPointer<vtkDoubleArray>::New();
  xArray->InsertNextValue(0.0);
  xArray->InsertNextValue(2.0);

  vtkSmartPointer<vtkDoubleArray> yArray = 
    vtkSmartPointer<vtkDoubleArray>::New();
  yArray->InsertNextValue(0.0);
  yArray->InsertNextValue(1.0);
  yArray->InsertNextValue(2.0);

  vtkSmartPointer<vtkDoubleArray> zArray = 
    vtkSmartPointer<vtkDoubleArray>::New();
  zArray->InsertNextValue(0.0);
  zArray->InsertNextValue(5.0);

  grid->SetXCoordinates(xArray);
  grid->SetYCoordinates(yArray);
  grid->SetZCoordinates(zArray);
  //設置屬性
  vtkSmartPointer<vtkPoints>points = vtkSmartPointer<vtkPoints>::New();
  grid->GetPoints(points);
  vtkSmartPointer<vtkFloatArray>values = vtkSmartPointer<vtkFloatArray>::New();
  for (vtkIdType id = 0; id < points->GetNumberOfPoints(); id++) {
	  values->InsertNextValue(vtkMath::Random(0, 10));
  }
  grid->GetPointData()->SetScalars(values);
  vtkSmartPointer<vtkShrinkFilter> shrinkFilter = 
    vtkSmartPointer<vtkShrinkFilter>::New();
  shrinkFilter->SetInputData(grid);
  shrinkFilter->SetShrinkFactor(.8);

  // Create a mapper and actor
  vtkSmartPointer<vtkDataSetMapper> mapper = 
    vtkSmartPointer<vtkDataSetMapper>::New();
  mapper->SetInputConnection(shrinkFilter->GetOutputPort());

  vtkSmartPointer<vtkActor> actor = 
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);

  // Visualize
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);

  renderer->AddActor(actor);

  renderWindow->Render();
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

Result