root/modules/viz/src/vtk/vtkTrajectorySource.cpp

DEFINITIONS

1. SetTrajectory
2. ExtractPoints
3. RequestData

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#include "precomp.hpp"

namespace cv { namespace viz
{
    vtkStandardNewMacro(vtkTrajectorySource);
}}

cv::viz::vtkTrajectorySource::vtkTrajectorySource() { SetNumberOfInputPorts(0); }
cv::viz::vtkTrajectorySource::~vtkTrajectorySource() {}

void cv::viz::vtkTrajectorySource::SetTrajectory(InputArray _traj)
{
    CV_Assert(_traj.kind() == _InputArray::STD_VECTOR || _traj.kind() == _InputArray::MAT);
    CV_Assert(_traj.type() == CV_32FC(16) || _traj.type() == CV_64FC(16));

    Mat traj;
    _traj.getMat().convertTo(traj, CV_64F);
    const Affine3d* dpath = traj.ptr<Affine3d>();
    size_t total = traj.total();

    points = vtkSmartPointer<vtkPoints>::New();
    points->SetDataType(VTK_DOUBLE);
    points->SetNumberOfPoints((vtkIdType)total);

    tensors = vtkSmartPointer<vtkDoubleArray>::New();
    tensors->SetNumberOfComponents(9);
    tensors->SetNumberOfTuples((vtkIdType)total);

    for(size_t i = 0; i < total; ++i, ++dpath)
    {
        Matx33d R = dpath->rotation().t();  // transposed because of
        tensors->SetTuple((vtkIdType)i, R.val);        // column major order

        Vec3d p = dpath->translation();
        points->SetPoint((vtkIdType)i, p.val);
    }
}

cv::Mat cv::viz::vtkTrajectorySource::ExtractPoints(InputArray _traj)
{
    CV_Assert(_traj.kind() == _InputArray::STD_VECTOR || _traj.kind() == _InputArray::MAT);
    CV_Assert(_traj.type() == CV_32FC(16) || _traj.type() == CV_64FC(16));

    Mat points(1, (int)_traj.total(), CV_MAKETYPE(_traj.depth(), 3));
    const Affine3d* dpath = _traj.getMat().ptr<Affine3d>();
    const Affine3f* fpath = _traj.getMat().ptr<Affine3f>();

    if (_traj.depth() == CV_32F)
        for(int i = 0; i < points.cols; ++i)
            points.at<Vec3f>(i) = fpath[i].translation();

    if (_traj.depth() == CV_64F)
        for(int i = 0; i < points.cols; ++i)
            points.at<Vec3d>(i) = dpath[i].translation();

    return points;
}

int cv::viz::vtkTrajectorySource::RequestData(vtkInformation *vtkNotUsed(request), vtkInformationVector **vtkNotUsed(inputVector), vtkInformationVector *outputVector)
{
    vtkInformation *outInfo = outputVector->GetInformationObject(0);
    vtkPolyData *output = vtkPolyData::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));
    output->SetPoints(points);
    output->GetPointData()->SetTensors(tensors);
    return 1;
}