static void drawOpticalFlow()

in calc_homography/myflow.cpp [89:124]

• 29 lines of code
• 8 McCabe index (conditional complexity)

static void drawOpticalFlow(const Mat_<float>& flowx, const Mat_<float>& flowy, Mat& dst, float maxmotion = -1)
{
    dst.create(flowx.size(), CV_8UC3);
    dst.setTo(Scalar::all(0));

    // determine motion range:
    float maxrad = maxmotion;

    if (maxmotion <= 0)
    {
        maxrad = 1;
        for (int y = 0; y < flowx.rows; ++y)
        {
            for (int x = 0; x < flowx.cols; ++x)
            {
                Point2f u(flowx(y, x), flowy(y, x));

                if (!isFlowCorrect(u))
                    continue;

                maxrad = max(maxrad, sqrt(u.x * u.x + u.y * u.y));
            }
        }
    }

    for (int y = 0; y < flowx.rows; ++y)
    {
        for (int x = 0; x < flowx.cols; ++x)
        {
            Point2f u(flowx(y, x), flowy(y, x));

            if (isFlowCorrect(u))
                dst.at<Vec3b>(y, x) = computeColor(u.x / maxrad, u.y / maxrad);
        }
    }
}