Totem

Github for the totem project

Working pipe

• openFrameworks (video generation) => syphon => touch designer (conversion video to serial) => serial => teensy => LED
• LED array : 9 x 360

Folders

• Code : working folder, one folder by language.
• Hardware : PCB files, gerbers, BOM… coming from Lucas.
• Stuff : for dumping potential codes, examples, snippets… working or not.

openFrameworks

Install the OF folder “of_v0.10.1_osx_release” in Totem/Code/openFrameworks/of_v0.10.1_osx_release “of_v0.10.1_osx_release” is included in the .gitignore .

OSC

Every message will be of the form /[side]/[process]/[parameter] [val0] [val1] …

With:

• side : A or B (corresponds to the actual sides of the totem)
• process : CV (computer vision), mixer, SNN, coarse, glyph, transition
• parameter : depends on process
• values : floats normalized between 0 & 1 or -1 & 1

Exemple: /A/CV/flowInst 12 -13.5 100 /B/mixer/faders 0 0 0.7 0.3

CV

• flow

Optical flows, gives three values : [x] SUM(vector x) ; [y] SUM (vector y) ; [s] SUM(speed).

4 different time windows : 0s (instantaneous), 10s, 30s, 60s

messages:

/[side]/CV/flow/0 [x] [y] [s]
/[side]/CV/flow/10 [x] [y] [s]
/[side]/CV/flow/30 [x] [y] [s]
/[side]/CV/flow/60 [x] [y] [s]

• presence

presence of people in the camera field, one value [0..1] (0: no one / 1: full with people).

4 different time windows : 1s, 10s, 30s, 60s

messages:

/[side]/CV/presence/1 [pres]
/[side]/CV/presence/10 [pres]
/[side]/CV/presence/30 [pres]
/[side]/CV/presence/60 [pres]

mixer

• faders corresponds to the mixing of the four visual processes (SNN, coards, glyph, transition).

4 float values [0..1]

messages:

/[side]/mixer/faders [SNN] [coarse] [glyph] [transition]

Example for receiving OSC with Processing

//import librarys for OSC
import oscP5.*;
import netP5.*;

//vars for OSC
OscP5 oscP5;
NetAddress myRemoteLocation;

void setup(){
  /* start oscP5, listening for incoming messages at port 12000 */
  oscP5 = new OscP5(this, 12000);

  /* myRemoteLocation is a NetAddress. a NetAddress takes 2 parameters,
   * an ip address and a port number. myRemoteLocation is used as parameter in
   * oscP5.send() when sending osc packets to another computer, device, 
   * application. usage see below. for testing purposes the listening port
   * and the port of the remote location address are the same, hence you will
   * send messages back to this sketch.
   */
  myRemoteLocation = new NetAddress("127.0.0.1", 12000);
}

/* incoming osc message are forwarded to the oscEvent method. */
void oscEvent(OscMessage theOscMessage) {
  /* print the address pattern and the typetag of the received OscMessage */
  print("### received an osc message.");
  print(" addrpattern: "+theOscMessage.addrPattern());
  println(" typetag: "+theOscMessage.typetag());
  println(" value: "+theOscMessage.get(0).intValue());

  if (theOscMessage.checkAddrPattern("/led") == true) {
    brightness = theOscMessage.get(0).intValue();
  }
}

Example for sending OSC with Processing

/* in the following different ways of creating osc messages are shown by example */
  OscMessage myMessage = new OscMessage("/test");

  myMessage.add(123); /* add an int to the osc message */

  /* send the message */
  oscP5.send(myMessage, myRemoteLocation); 

Touchdesigner

Disable auto backup (to avoid cluttering the git) : Preference -> increment filename on save -> off

Syphon

Issue with Touch Designer not reconnecting with syphon:

• Processing : To stop a program do not click the "stop" button but the close the display window
• openFrameworks : To stop a program close the display window

Open Frameworks

Need ofxSyphon

In ofApp.h

#include "ofxSyphon.h"

public:
    ofxSyphonServer mainOutputSyphonServer;
    ofxSyphonClient mClient;

In ofApp.cpp

void ofApp::setup(){
    mainOutputSyphonServer.setName("OF_syphon");
    mClient.setup();
}

void ofApp::draw(){
    mClient.draw(9,360);
    mainOutputSyphonServer.publishScreen();
}