I am trying to locate an old post from the previous forums that talked about spawning multiple sketches from one sketch. Is there any way to access this old post or could someone direct me towards doing this?

I have a simple setup where I am using ControlP5, PeasyCam, and OpenGL. My sketch almost works but when I try to use the ControlP5 sliders they look distorted (see image).

How do I right align a TextLabel in ControlP5?

I am following the example " PDF Files from 3D Geometry (With Screen Display)"  shown on  http://processing.org/reference/libraries/pdf/index.html. 

Is there a way to output text such that it can be copied from a sketch window? 

Is there an option somewhere for deleting all previously created data from one sketch to another when saving?

I want Sunflow to work in Processing and couldn't get P5Sunflow working so I looked elsewhere. 

I need to be able to pull the id or twitter user name from an incoming tweet. Right now I can call tweet.user() to get a String back with something that looks like "com.twitter.processing.User@dca7d0".

Is there any way to get the exact user id or username from a Status object?

For example, this is the callback used. At the bottom is the User object I assign tweet.user() to.

1. void tweet(Status tweet) {
   
     // store the latest tweet text
     tweetText = tweet.text();
    
     println("------------------------"); 
     println("createdAt: " + tweet.createdAt());  
     println("favorited: " + tweet.favorited());  
     println("tweet id: " + tweet.id());
     println("geo: " + tweet.geo());
     println("inReplyToScreenName: " + tweet.inReplyToScreenName());
     println("inReplyToStatusId: " + tweet.inReplyToStatusId());
     println("inReplyToUserId: " + tweet.inReplyToUserId());   
     println("source: " + tweet.source()); 
     println("text: " + tweet.text());     
     println("truncated: " + tweet.truncated());  
   
     User user = new User();
     user = tweet.user();
     println("user: " + user); 
   

I want to be able to specify parameters for both "follow" and "track" in the TweetStream call below

TweetStream s = new TweetStream(this, "stream.twitter.com", 80, "1/statuses/filter.json?follow=userID", "mytwitterid", "mytwitterpassword");

How do you do this? I tried using ?follow=userID, ?track=red,blue,green and nothing works.

I am looking for resources that other OpenGL masters are using or have used in learning OpenGL and Processing. I am just venturing into this realm and could use some good tutorials.

Thanks!

I am interested to find out more about how others improve performance when it comes to building Particle Systems. Mainly, when I work with alot of particles I see a degrade in the frame rate and overall speed of the sketch. Can anyone shed any light on this for me?

Here is my sketch below. It is based on the particle systems examples from Daniel Shiffman's upcoming Nature of Code book. Any help would be greatly appreciated. Thanks!

MultipleFireParticleSystem.pde

1. ArrayList<ParticleSystem> psArray;
   Random generator;
   
   void setup() {
     size(400, 400);
     background(255); 
     smooth();
   
     generator = new Random();
     psArray = new ArrayList<ParticleSystem>();
   
     for (int i = 0; i< 10; i++) {
       psArray.add(new ParticleSystem(0, new PVector(random(width), random(height))));
     }
   }
   
   void draw() {
     background(0);
   
     Iterator it = psArray.iterator();
     while (it.hasNext()) {
       ParticleSystem ps = (ParticleSystem)it.next();
   
       float dx = map(mouseX, 0,width,-0.1,0.1);
       PVector wind = new PVector(dx,0); 
       ps.applyForce(wind);
    
       ps.addParticle();
       ps.run();
     
     }
   }
   

Class: Particle

1. class Particle {
     PVector location;
     PVector velocity;
     PVector acceleration;
     float lifespan;    // keep track of how long the particle is alive
   
     float mass = 1;
   
     PImage img;
   
     Particle (PVector l, PImage img_) {
       location = l.get(); // make copy of PVector
       acceleration = new PVector(0,0); //init to 0,0
   
         // create initial velocities
       float vx = (float) generator.nextGaussian() * 0.3;
       float vy = (float) generator.nextGaussian() * 0.3-1.0;
       velocity = new PVector(vx, vy);    
       //velocity = new PVector(random(-2, 2), random(-3, 0));
       lifespan = 255;
       img = img_;
     }
   
     void run() {
       update();
       display();
     }
   
     void applyForce(PVector force) {
       PVector f = force.get();
       //f.div(mass); //ignore mass
       acceleration.add(f);
     }
   
     void update() {
       velocity.add(acceleration);
       location.add(velocity);
       acceleration.mult(0);
       lifespan -= 2.0;
     }
   
     void display() {
       imageMode(CENTER);
       tint(255, lifespan);
       image(img, location.x, location.y);
     } 
   
     boolean isDead() {
       if (lifespan < 0.0) {
         return true;
       }
       else {
         return false;
       }
     }
   }
   

Class: ParticleSystem

1. class ParticleSystem {
     ArrayList<Particle> particles;  // use one list to include all subclasses of Particle - polymorphism awesomeness!
     PVector origin;
    
     PImage pImg;
   
     ParticleSystem (int num, PVector location) {
       origin = location.get();
       particles = new ArrayList<Particle>();
       //img = img_;
      
       for(int i=0; i < num; i++) {
         addParticle();
       }
     }
   
     void addParticle() {
         pImg = loadImage("textureRed.png");             
        particles.add(new Particle(origin, pImg));
     }
    
    // Recieve a force as a pVector and apply that force to all the Particles in the Particle System
     void applyForce(PVector f) {
       for(Particle p: particles) {
         p.applyForce(f);
       } 
     }
   
     void run() {
       Iterator it = particles.iterator();
       while (it.hasNext()) {
         Particle p = (Particle)it.next();
         p.run();
         if (p.isDead()) {
           it.remove();
         }
       }
     }
   }
   

Image

I need a way of pulling in the filename of a sketch as a string. Has anyone done this?

Thanks