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Network Library and the Draw() function

[2 Replies]
- 04-Oct-2011 12:22 PM
- Forum: Core Library Questions
I recently adapted the 'Loop' sketch in the Processing examples to take a mouse position from another application across a network. The position of the video is now controlled by a remote mouse input. All this works fine with one exception that is the nice trails that follow the video around the screen do not occur in the networked version.

Here's a screen capture for the original 'Loop' sketch :

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// Code for the Original Loop Sketch in Processing Examples folder //////////////

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

import processing.video.*;

Movie myMovie;

void setup() {
size(640, 480, P2D);
background(0);
// Load and play the video in a loop
myMovie = new Movie(this, "station.mov");
myMovie.loop();
}

void movieEvent(Movie myMovie) {
myMovie.read();
}

void draw() {
tint(255, 20);
image(myMovie, mouseX-myMovie.width/2, mouseY-myMovie.height/2);
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

The networked version gets the mouse position (in this case just the X value) and passes it to Processing.

In this case however I lose the graphic trails from the original version illustrated above.

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// My adapted sketch with the mouse coordinates being passed in through /////

// an XML socket from AS3                                                                           /////

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
import processing.net.*;
int port = 8080;
Server myServer;

Client thisClient;
int myX;

import processing.video.*;
Movie myMovie;

void setup()
{
size(640, 480, P2D);
background(0);
myServer = new Server(this, port);
myMovie = new Movie(this, "station.mov");
myMovie.loop();

}
void movieEvent(Movie myMovie) {
myMovie.read();
}

void draw()
{
thisClient = myServer.available(); // this line seems to remove the ttrailing effect
if (thisClient !=null) {
    background(0);

    String incomingMouseData = thisClient.readString();

    //******************************************************************************

    // the next two lines strip away what appears to be a stray linefeed that

    // comes with the XML data from Flash

    //*******************************************************************************
    int theLength = incomingMouseData.length() -1;

    String mySubstring = incomingMouseData.substring(0,theLength);
    myX = int(mySubstring);


     if(myX != 0){
      image(myMovie, myX, 100); // I don't get any trails from this line while the movie is translated by the remote cursor
     }
}
}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

If anyone could shed some light on how I might maintain the trails in this situation I would be sincerely grateful.

Cheers

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