ttkCinemaDarkroomNoise.cpp

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#include <ttkCinemaDarkroomNoise.h>
 
#include <ttkUtils.h>
#include <vtkFloatArray.h>
#include <vtkImageData.h>
#include <vtkInformation.h>
#include <vtkObjectFactory.h>
#include <vtkPointData.h>
 
vtkStandardNewMacro(ttkCinemaDarkroomNoise);
 
ttkCinemaDarkroomNoise::ttkCinemaDarkroomNoise() : ttkCinemaDarkroomShader() {
  this->setDebugMsgPrefix("CinemaDarkroomNoise");
}
ttkCinemaDarkroomNoise::~ttkCinemaDarkroomNoise() = default;
 
int ttkCinemaDarkroomNoise::RequestData(vtkInformation *ttkNotUsed(request),
                                        vtkInformationVector **inputVector,
                                        vtkInformationVector *outputVector) {
 
  auto inputImage = vtkImageData::GetData(inputVector[0]);
  auto outputImage = vtkImageData::GetData(outputVector);
  outputImage->ShallowCopy(inputImage);
 
  size_t const nPoints = outputImage->GetNumberOfPoints();
 
  auto noise = vtkSmartPointer<vtkFloatArray>::New();
  noise->SetName("Noise");
  noise->SetNumberOfTuples(nPoints);
  auto noiseData = static_cast<float *>(ttkUtils::GetVoidPointer(noise));
 
  int dim[3];
  outputImage->GetDimensions(dim);
 
  ttk::Timer const timer;
  const std::string msg = "Computing Noise (" + std::to_string(dim[0]) + "x"
                          + std::to_string(dim[1]) + "x"
                          + std::to_string(dim[2]) + ")";
 
  this->printMsg(msg, 0, 0, 1, ttk::debug::LineMode::REPLACE);
 
  for(size_t i = 0; i < nPoints; i++)
    noiseData[i] = ((float)std::rand()) / ((float)RAND_MAX);
 
  this->printMsg(msg, 0, 0, 1);
 
  outputImage->GetPointData()->AddArray(noise);
 
  return 1;
}