Sensing Machines Spout

ofApp-recv.cpp

#include "ofApp.h"

void ofApp::setup()
{
    ofSetWindowShape(640, 480);

    // Set up Spout receivers.
    receiverGrabber.init("Video Input");
    receiverThreshold.init("Threshold Image");

    // Set parameters and GUI.
    recvGrabber.set("Recv Grabber", true);
    recvThreshold.set("Recv Threshold", false);

    guiPanel.setup("Spout Recv", "settings.json");
    guiPanel.add(recvGrabber);
    guiPanel.add(recvThreshold);
}

void ofApp::update()
{
    if (recvGrabber)
    {
        // Draw grabber.
        receiverGrabber.receive(texGrabber);
    }
    else if (recvThreshold)
    {
        // Draw threshold.
        receiverThreshold.receive(texThreshold);
    }
}

void ofApp::draw()
{
    if (recvGrabber)
    {
        // Draw grabber.
        texGrabber.draw(0, 0);
    }
    else if (recvThreshold)
    {
        // Draw threshold.
        texThreshold.draw(0, 0);
    }

    guiPanel.draw();
}

void ofApp::keyPressed(int key)
{
    if (key == ' ')
    {
        receiverGrabber.selectSenderPanel();
    }
}

ofApp-recv.h

#pragma once

#include "ofMain.h"

#include "ofxGui.h"
#include "ofxSpout.h"

class ofApp : public ofBaseApp
{
public:
    void setup();
    void update();
    void draw();

    void keyPressed(int key);

    ofxSpout::Receiver receiverGrabber;
    ofxSpout::Receiver receiverThreshold;

    ofTexture texGrabber;
    ofTexture texThreshold;

    ofParameter<bool> recvGrabber;
    ofParameter<bool> recvThreshold;

    ofxPanel guiPanel;
};

ofApp-send.cpp

#include "ofApp.h"

void ofApp::setup()
{
    ofSetWindowShape(640, 480);

    // Start video grabber.
    grabber.setup(640, 480);

    // Allocate threshold image (same size as video, single channel).
    thresholdImg.allocate(640, 480, OF_IMAGE_GRAYSCALE);

    // Set up Spout senders.
    senderGrabber.init("Video Input");
    senderThreshold.init("Threshold Image");

    // Set parameters and GUI.
    thresholdVal.set("Threshold Val", 127, 0, 255);
    sendGrabber.set("Send Grabber", true);
    sendThreshold.set("Send Threshold", true);

    guiPanel.setup("Spout Send", "settings.json");
    guiPanel.add(thresholdVal);
    guiPanel.add(sendGrabber);
    guiPanel.add(sendThreshold);
}

void ofApp::update()
{
    grabber.update();

    if (grabber.isFrameNew())
    {
        // Threshold video image.
        // Use references (&) when getting the ofPixels objects to
        // avoid unnecessary copies.
        ofPixels& videoPix = grabber.getPixels();
        ofPixels& thresholdPix = thresholdImg.getPixels();
        for (int row = 0; row < videoPix.getHeight(); row++)
        {
            for (int col = 0; col < videoPix.getWidth(); col++)
            {
                int pixVal = videoPix.getColor(col, row).getBrightness();
                if (pixVal < thresholdVal)
                {
                    thresholdPix.setColor(col, row, ofColor(0));
                }
                else
                {
                    thresholdPix.setColor(col, row, ofColor(255));
                }
            }
        }

        thresholdImg.update();

        if (sendGrabber)
        {
            // Send grabber texture.
            senderGrabber.send(grabber.getTexture());
        }

        if (sendThreshold)
        {
            // Send threshold texture.
            senderThreshold.send(thresholdImg.getTexture());
        }
    }
}

void ofApp::draw()
{
    thresholdImg.draw(0, 0);

    guiPanel.draw();
}

ofApp-send.h

#pragma once

#include "ofMain.h"

#include "ofxGui.h"
#include "ofxSpout.h"

class ofApp : public ofBaseApp
{
public:
    void setup();
    void update();
    void draw();

    ofVideoGrabber grabber;
    ofImage thresholdImg;

    ofxSpout::Sender senderGrabber;
    ofxSpout::Sender senderThreshold;

    ofParameter<int> thresholdVal;
    ofParameter<bool> sendGrabber;
    ofParameter<bool> sendThreshold;

    ofxPanel guiPanel;
};