Method DrawTrack

example/VideoExample.cpp:524–668

\brief VideoExample::DrawTrack \param frame \param track \param drawTrajectory

/// \param drawTrajectory
///
void VideoExample::DrawTrack(cv::Mat frame,
                             const TrackingObject& track,
                             bool drawTrajectory,
                             int framesCounter,
                             const std::string& userLabel)
{
    cv::Scalar color = track.m_isStatic ? cv::Scalar(255, 0, 255) : cv::Scalar(0, 255, 0);
    cv::Point2f rectPoints[4];
    track.m_rrect.points(rectPoints);
    //std::cout << "track: rrect [" << track.m_rrect.size << " from " << track.m_rrect.center << ", " << track.m_rrect.angle << "]" << std::endl;
    for (int i = 0; i < 4; ++i)
    {
        cv::line(frame, rectPoints[i], rectPoints[(i+1) % 4], color);
    }

#if 0
#if 0
	track_t minAreaRadiusPix = frame.rows / 20.f;
#else
	track_t minAreaRadiusPix = -1.f;
#endif
	track_t minAreaRadiusK = 0.5f;
	cv::Size_<track_t> minRadius(minAreaRadiusPix, minAreaRadiusPix);
	if (minAreaRadiusPix < 0)
	{
		minRadius.width = minAreaRadiusK * track.m_rrect.size.width;
		minRadius.height = minAreaRadiusK * track.m_rrect.size.height;
	}

	Point_t d(3.f * track.m_velocity[0], 3.f * track.m_velocity[1]);
	cv::Size2f els(std::max(minRadius.width, fabs(d.x)), std::max(minRadius.height, fabs(d.y)));
	Point_t p1 = track.m_rrect.center;
	Point_t p2(p1.x + d.x, p1.y + d.y);
	float angle = 0;
	Point_t nc = p1;
	Point_t p2_(p2.x - p1.x, p2.y - p1.y);
	if (fabs(p2_.x - p2_.y) > 5) // pix
	{
		if (fabs(p2_.x) > 0.0001f)
		{
			track_t l = std::min(els.width, els.height) / 3;

			track_t p2_l = sqrt(sqr(p2_.x) + sqr(p2_.y));
			nc.x = l * p2_.x / p2_l + p1.x;
			nc.y = l * p2_.y / p2_l + p1.y;

			angle = atan(p2_.y / p2_.x);
		}
		else
		{
			nc.y += d.y / 3;
			angle = CV_PI / 2.f;
		}
	}

	cv::RotatedRect rr(nc, els, 180.f * angle / CV_PI);
    cv::ellipse(frame, rr, cv::Scalar(100, 0, 100), 1);
#endif