cxThresholdPreview.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
All rights reserved.

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   this list of conditions and the following disclaimer.

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   and/or other materials provided with the distribution.

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   may be used to endorse or promote products derived from this software 
   without specific prior written permission.

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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
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#include "cxThresholdPreview.h"
#include <vtkVolume.h>
#include <vtkVolumeProperty.h>
#include "cxImageTF3D.h"
#include "cxImageLUT2D.h"
#include "cxVolumetricRep.h"
#include "cxImage.h"


namespace cx
{


ThresholdPreview::ThresholdPreview() :
        mShadingOn_original(false)
{
}

void ThresholdPreview::revertTransferFunctions()
{
    if (!mModifiedImage)
        return;

    mModifiedImage->setLookupTable2D(mTF2D_original);
    mModifiedImage->setTransferFunctions3D(mTF3D_original);
    mModifiedImage->setShadingOn(mShadingOn_original);

        mModifiedImage->setInterpolationTypeToLinear();

    mTF3D_original.reset();
    mTF2D_original.reset();
    mModifiedImage.reset();
}


void ThresholdPreview::setPreview(ImagePtr image, double lower)
{
        if (!image)
                return;

        this->setPreview(image, Eigen::Vector2d(lower, image->getMax()));
}

void ThresholdPreview::setPreview(ImagePtr image, const Eigen::Vector2d& threshold)
{
        if (!image)
                return;

        if (image!=mModifiedImage)
                this->removePreview();

        this->storeOriginalTransferfunctions(image);
        image->resetTransferFunctions();

        ImageTF3DPtr tf3D = image->getTransferFunctions3D();

        double lower = threshold[0];
        double upper = threshold[1];

        ColorMap colors;
        colors[lower] = Qt::green;
        colors[image->getMax()] = Qt::green;
        tf3D->resetColor(colors);

        IntIntMap opacity;
        opacity[lower - 1] = 0;
        opacity[lower] = image->getMaxAlphaValue();
        opacity[upper] = image->getMaxAlphaValue();
        opacity[upper + 1] = 0;
        tf3D->resetAlpha(opacity);

        image->setShadingOn(true);

        ImageLUT2DPtr lut2D = image->getLookupTable2D();
        colors.clear();
        colors[lower] = Qt::green;
        colors[image->getMax()] = Qt::green;
        lut2D->resetColor(colors);
        lut2D->setLLR(lower);

        //Remove VTK linear interpolation
        mModifiedImage->setInterpolationTypeToNearest();
}

void ThresholdPreview::removePreview()
{
//    std::cout << "ThresholdPreview::removePreview " << std::endl;
    this->revertTransferFunctions();
}

void ThresholdPreview::storeOriginalTransferfunctions(ImagePtr image)
{
        if (!mModifiedImage)
        {
                mModifiedImage = image;
                mTF3D_original = image->getTransferFunctions3D()->createCopy();
                mTF2D_original = image->getLookupTable2D()->createCopy();
                mShadingOn_original = image->getShadingOn();
        }
}

}