Red/Cyan Anaglyph

#include <opencv2/opencv.hpp>
#include <vector>

#define ZERO_LEFT true

using namespace cv;
using namespace std;

int main(int argc, char** argv)
{
    VideoCapture cap0(0), cap1(1);//to capture the camera frames
    Mat left, right, composite;//The images
    std::vector<Mat> channelsLeft, channelsRight, channelsComposite(3);
    namedWindow("Display", CV_WINDOW_NORMAL);

    for(int i = 0; i < 30; ++i)//bleed off any initial images; they're often crap
    {
        cap0 >> left;
        cap1 >> right;
    }

    for(;;)//main loop.  I saw a stack exchange argument on why for(;;) is better than while(true).  Don't know if I agree, but whatever.
    {
        if(ZERO_LEFT)// if /dev/video0 is the left camera
        {
            cap0 >> left;//pull the images
            cap1 >> right;
        }
        else// /dev/video1 is the left camera
        {
            cap1 >> left;
            cap0 >> right;
        }
        split(left, channelsLeft);//split the images into their channels
        split(right, channelsRight);
        //OpenCV uses blue green red color order.  Blue and green planes should come from the right image, red from the left.
        channelsComposite[0] = channelsRight[0];
        channelsComposite[1] = channelsRight[1];
        channelsComposite[2] = channelsLeft[2];
        //stuff those channels back together
        merge(channelsComposite, composite);
        //and display them.  But imshow doesn't actually show images...
        imshow("Display", composite);
        //waitKey does.  Blame OpenCV for terrible design here.  Really, it's just terrible.
        if(waitKey(1) != -1)//check if a key was pressed
            break;//and exit
    }
}