ImageToSurface.cpp

/*
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 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */

#include "Exception.hpp"
#include "ImageToSurface.hpp"
#include <vtkThreshold.h>
#include <vtkGeometryFilter.h>
#include <vtkMarchingCubes.h>
#include <vtkTriangleFilter.h>
#include <Debug.hpp>

ImageToSurface::ImageToSurface()
    : mpImage(vtkSmartPointer<vtkImageData>::New()),
      mSegmentAboveThreshold(true),
      mThreshold(1.0),
      mpSurface(),
      mUseMarchingCubes(false)
{

}

boost::shared_ptr<ImageToSurface> ImageToSurface::Create()
{
    MAKE_PTR(ImageToSurface, pSelf);
    return pSelf;
}

ImageToSurface::~ImageToSurface()
{

}

vtkSmartPointer<vtkPolyData> ImageToSurface::GetOutput()
{
    if(mpSurface)
    {
        return(mpSurface);
    }
    else
    {
        EXCEPTION("No output set. Did you run 'Update()' ?");
    }
}

void ImageToSurface::SetInput(vtkSmartPointer<vtkImageData> pImage)
{
    mpImage = pImage;
}

void ImageToSurface::SetInputRaw(vtkImageData* pImage)
{
    mpImage.TakeReference(pImage);
//    pImage->Delete();
}

void ImageToSurface::SetThreshold(double threshold, bool segmentAboveThreshold)
{
    mThreshold = threshold;
    mSegmentAboveThreshold = segmentAboveThreshold;
}

void ImageToSurface::SetUseMarchingCubes(bool useMarchingCubes)
{
    mUseMarchingCubes = useMarchingCubes;
}

void ImageToSurface::Update()
{
    if(!mpImage)
    {
        EXCEPTION("No input set.");
    }

    if(mUseMarchingCubes)
    {
        vtkSmartPointer<vtkMarchingCubes> p_marching_cubes = vtkSmartPointer<vtkMarchingCubes>::New();
        #if VTK_MAJOR_VERSION <= 5
            p_marching_cubes->SetInput(mpImage);
        #else
            p_marching_cubes->SetInputData(mpImage);
        #endif

        p_marching_cubes->SetValue(0, mThreshold);
        p_marching_cubes->Update();

        mpSurface = p_marching_cubes->GetOutput();
    }
    else
    {
        vtkSmartPointer<vtkThreshold> p_threshold = vtkSmartPointer<vtkThreshold>::New();
        #if VTK_MAJOR_VERSION <= 5
            p_threshold->SetInput(mpImage);
        #else
            p_threshold->SetInputData(mpImage);
        #endif

        if(mSegmentAboveThreshold)
        {
            p_threshold->ThresholdByUpper(mThreshold);
        }
        else
        {
            p_threshold->ThresholdByLower(mThreshold);
        }

        vtkSmartPointer<vtkGeometryFilter> p_geometry = vtkSmartPointer<vtkGeometryFilter>::New();
        p_geometry->SetInputConnection(p_threshold->GetOutputPort());
        p_geometry->Update();

        vtkSmartPointer<vtkTriangleFilter> p_triangle = vtkSmartPointer<vtkTriangleFilter>::New();
        p_triangle->SetInputConnection(p_geometry->GetOutputPort());
        p_triangle->Update();

        mpSurface = p_triangle->GetOutput();
    }
}