OpenCV Tutorials —— Launching Viz

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Explanation

• Create a window.

• Start event loop. This event loop will run until user terminates it by pressing e, E, q, Q.

• Access same window via its name. Since windows are implicitly shared, sameWindow is exactly the same withmyWindow. If the name does not exist, a new window is created.
• Start a controlled event loop. Once it starts, wasStopped is set to false. Inside the while loop, in each iteration, spinOnce is called to prevent event loop from completely stopping. Inside the while loop, user can execute other statements including those which interact with the window.

Code

#include <opencv2/viz/vizcore.hpp>
#include <iostream>

using namespace cv;
using namespace std;

/**
* @function main
*/
int main()
{
    /// Create a window
    viz::Viz3d myWindow("Viz Demo");

    /// Start event loop
    myWindow.spin();

    /// Event loop is over when pressed q, Q, e, E
    cout << "First event loop is over" << endl;

    /// Access window via its name
    viz::Viz3d sameWindow = viz::getWindowByName("Viz Demo");

    /// Start event loop
    sameWindow.spin();

    /// Event loop is over when pressed q, Q, e, E
    cout << "Second event loop is over" << endl;

    /// Event loop is over when pressed q, Q, e, E
    /// Start event loop once for 1 millisecond
    sameWindow.spinOnce(1, true);
    while(!sameWindow.wasStopped())
    {
        /// Interact with window

        /// Event loop for 1 millisecond
        sameWindow.spinOnce(1, true);
    }

    /// Once more event loop is stopped
    cout << "Last event loop is over" << endl;
    return 0;
}

OpenCV Tutorials —— Launching Viz

标签：style   io   ar   os   sp   for   strong   on   div   

原文地址：http://www.cnblogs.com/sprint1989/p/4128581.html