cxNavigatedVideoImage.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
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#include "cxNavigatedVideoImage.h"
#include <vtkImageData.h>
#include "cxVideoSource.h"
#include "cxImageLUT2D.h"
#include "cxSliceProxy.h"
namespace cx
{
NavigatedVideoImage::NavigatedVideoImage(QString uid, VideoSourcePtr source, SliceProxyPtr sliceProxy, QString name):
        Image(uid, source->getVtkImageData(), name),
        mSliceProxy(sliceProxy)
{
        mToolPositionX = -1;
        mToolPositionY = -1;
        connect(source.get(), &VideoSource::newFrame, this, &NavigatedVideoImage::newFrame);
        getLookupTable2D()->setFullRangeWinLevel(source->getVtkImageData());
}

static double computeEffectiveOffset(double offset, double size)
{
        if (offset >= 0)
        {
                return offset;
        }
        return size/2;
}

Transform3D NavigatedVideoImage::get_rMd() const
{
        int size[3];
        double spacing[3];
        mBaseImageData->GetDimensions(size);
        mBaseImageData->GetSpacing(spacing);
        double offsetX = computeEffectiveOffset( mToolPositionX, size[0] );
        double offsetY = computeEffectiveOffset( mToolPositionY, size[1] );
        Transform3D T = createTransformTranslate(Vector3D(-(size[0]-offsetX)*spacing[0], -offsetY*spacing[1], 0));
        Transform3D Flip = createTransformScale(Vector3D(1, -1, 1)); // Video data has inverted Y axis compared to other data
        return mSliceProxy->get_sMr().inv() * Flip * T;
}

double NavigatedVideoImage::computeFullViewZoomFactor(DoubleBoundingBox3D viewport) const
{
        int size[3];
        mBaseImageData->GetDimensions(size);
        double scalefactorX =(viewport[1]-viewport[0])/(double)size[0];
        double scalefactorY = (viewport[3]-viewport[2])/(double)size[1];
        return std::min(scalefactorX, scalefactorY);
}

void NavigatedVideoImage::newFrame()
{
        double spacing[3];
        mBaseImageData->GetSpacing(spacing);
        if (spacing[0] != mSpacing[0] || spacing[1] != mSpacing[1] ||
            spacing[2] != mSpacing[2] )
        {
                emit transformChanged();
        }
        emit vtkImageDataChanged();
        mSpacing[0] = spacing[0];
        mSpacing[1] = spacing[1];
        mSpacing[2] = spacing[2];
}

void NavigatedVideoImage::setToolPosition(double positionX, double positionY)
{
        mToolPositionX = positionX;
        mToolPositionY = positionY;
        emit transformChanged();
}

};