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Re : PLEASE HELP!!! Serial Error

December 29, 2012, 3:25 am
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I deleted the duplicate thread, avoid this please. You can edit this topic to improve the subject line or the content.
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Re : PLEASE HELP!!! Serial Error

December 29, 2012, 3:30 am
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..and check if  Arduino.list()[0] is really your Ardu !! Probably its on another index of your usb-devices.
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Re : PLEASE HELP!!! Serial Error

December 29, 2012, 4:33 am
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ok!

well I managed to get rid of the following error:
The error I am getting is: Error inside Serial.<init.()

But it still doesn't seem to be working at all

this is what I get in the black box under the code:

Dec 29 06:29:44 Mac-2.local java[9693] <Error>: CGContextGetCTM: invalid context 0x0
Dec 29 06:29:44 Mac-2.local java[9693] <Error>: CGContextSetBaseCTM: invalid context 0x0
Dec 29 06:29:44 Mac-2.local java[9693] <Error>: CGContextGetCTM: invalid context 0x0
Dec 29 06:29:44 Mac-2.local java[9693] <Error>: CGContextSetBaseCTM: invalid context 0x0
Stable Library
=========================================
Native lib Version = RXTX-2.1-7
Java lib Version   = RXTX-2.1-7
[Ljava.lang.String;@457d21

Then the grey box appears which I should be able to "command" my arduino. But when I press 'e' nothing happens. Not sure whats up. :(

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Re : Video list array, out of memory

December 29, 2012, 2:18 pm
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I'm sorry to insist but i don't find a solution.
I just want to intantiate a video and play different video with the element.

At this time, the first video play but stay in the memory when i call the second.
I would like to remove the first one.

Thank you for your help.


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No font in exported PDF

December 29, 2012, 6:44 pm
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I have tried literally dozens of plotting, drawing, image processing, and page layout programs, including freeware and expensive commercial software, to do what I consider a moronically simple task. None of them do, in a simple manner, what I want to do. All I want to do is to create a circular layout with text on a circular path, some lines, and some images positioned at various points around the circle. Processing is by far the most feature-rich, simplest to script program I have found. While I'm sure I can create exactly what I want with it, the huge stumbling block is the PDF export library. I have tried for hours to get the exported PDF to contain the font that I specified in the script. No matter what font I try, I keep getting no fonts at all. The PDF displays text with some generic default font:



Here is the script:

  1. // The message to be displayed

    String message = "text along a curve";

    PFont f;
    // The radius of a circle
    float r = 100;

    import processing.pdf.*;

    void setup() {
      size(400, 400);
      String[] fontList = PFont.list();
      println(fontList);
      f = createFont("Georgia",40,true);
      textFont(f);
      // The text must be centered!
      textAlign(CENTER);
      smooth();
      noLoop();
      beginRecord(PDF, "text_along_a_curve.pdf"); 
    }

    void draw() {
      background(255);

      // Start in the center and draw the circle
      translate(width / 2, height / 2);
      noFill();
      stroke(0);
      ellipse(0, 0, r*2, r*2);

      // We must keep track of our position along the curve
      float arclength = 0;

      // For every box
      for (int i = 0; i < message.length(); i++)
      {
        // Instead of a constant width, we check the width of each character.
        char currentChar = message.charAt(i);
        float w = textWidth(currentChar);

        // Each box is centered so we move half the width
        arclength += w/2;
        // Angle in radians is the arclength divided by the radius
        // Starting on the left side of the circle by adding PI
        float theta = PI + arclength / r;    

        pushMatrix();
        // Polar to cartesian coordinate conversion
        translate(r*cos(theta), r*sin(theta));
        // Rotate the box
        rotate(theta+PI/2); // rotation is offset by 90 degrees
        // Display the character
        fill(0);
        text(currentChar,0,0);
        popMatrix();
        // Move halfway again
        arclength += w/2;
      }
      endRecord();
    }
I have read and reread the PDF Export page and found it not that helpful and outdated. I tried using textMode(SHAPE) as advised there and it threw an exception. There is talk about adding a .ttf file to the data directory. What data directory? "I don't see no data directory." So I am at wits' end about how to do this. I'm tired of "riddles in the dark." Being able to control the font in the output PDF is mandatory. Without this ability, the program is all but useless to me. So how do I go about doing this?

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Re : No font in exported PDF

December 29, 2012, 11:52 pm
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You create the data directory in the folder your sketch is in. However if you know where the ttf fonts are stored on your system it is easier just to enter the path (then you can pick and choose). See example below for my linux box.

  1. myFont = createFont("/usr/share/fonts/truetype/freefont/FreeSans.ttf", 18); 
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many copy calls lead to OutOfMemoryError

December 30, 2012, 8:20 am
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Hi everyone,

I'm working on a program, which slices up images and draws these slices on the screen. But no matter if I try PGraphics or PImages after a while my program simply crashes because of the OutOfMemoryError.

I have simplified my program so that is easy go trough it. But it seems like if the copy call leaves something in the memory, which is not cleaned up.

  2.   PImage  s1, s2;
  3.   int      left  = 1;
  4.   int      mode  = 0;
  5.   int      sliceW  = 50;
  6.   PImage    pg;
  7.   
  8.   @Override
  9.   public void setup() {
  10.     super.setup();
  11.     s1 = loadImage("1.jpg");
  12.     s2 = loadImage("2.jpg");
  13.     size(s1.width * 2,s1.height);
  14.     pg = createImage((int)( s1.width  * .5f),  s1.height , RGB);
  15.   }
  16.   
  17.   @Override
  18.   public void draw() {
  19.     Object[] leftG = getSlice(getPart(false, left == 1 ? s1 : s2), sliceW);
  20.     Object[] rightG = getSlice(getPart(true, left == 1 ? s2 : s1), sliceW);
  21.     switch (mode) {
  22.       case 0: // simple copy
  23.         image((PImage) leftG[0], (Integer) leftG[1], 0);
  24.         image((PImage) rightG[0], width - (Integer) rightG[1], 0);
  25.         break;
  26.     }
  27.   }
  28.   
  29.   private Object[] getSlice(PImage pg, int size) {
  30.     PImage slice = createImage(size, pg.height, RGB);
  31.     int x = (int) random(pg.width - size);
  32.     slice.copy(pg, x, 0, size, pg.height, 0, 0, size, pg.height);
  33.     return new Object[] { slice, x };
  34.   }
  35.   
  36.   private PImage getPart(boolean left, PImage img) {
  37.     int pgX = (int) (img.width * .5f);
  38.     int pgY =  img.height;
  39.     if (left)
  40.       pg.copy(img, 0, 0, pgX, pgY, 0, 0, pgX, pgY);
  41.     else
  42.       pg.copy(img, (int) img.width - pgX, 0, pgX, pgY, 0, 0, pgX, pgY);
  43.     return pg;
  44.   }
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Re : many copy calls lead to OutOfMemoryError

December 30, 2012, 9:29 am
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Re : many copy calls lead to OutOfMemoryError

December 30, 2012, 9:36 am
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The problem is almost certainly caused by line 30

PImage slice = createImage(size, pg.height, RGB);

since this is called from the draw method it is creating a new image approximately 60 times a second and I suspect that the garbage collector is not keeping up with the program.

You need to think carefully about what you want to achieve and design an algorithm that does not invlove creating PImage every frame.
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Re : many copy calls lead to OutOfMemoryError

December 30, 2012, 9:45 am
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hey you two

Thank you for the resonses. In this simplified version of the program I could indeed use the same PImage over and over again, not creating it 60times per second. In my actual program. the slices have different size, so I could create it with the maximum size and just "copy" the portion I need on the screen.

But the suggestes workaround in the link calling

  2.         g.removeCache((PImage) leftG[0]);
  3.         g.removeCache((PImage) rightG[0]);
already  works fine.
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Re : No font in exported PDF

December 30, 2012, 10:48 am
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Thanks for the speedy reply. I am using the Windows version and I tried this, but it only selected the correct font for the graphics window, just as before. The PDF still contains no font information. A-r-r-r-r-g-g-g-g-g-h-h-h-h! I need a way to embed the fonts into the PDF. Does anyone know how to do that? Once I can do this, doing everything else is trivial.

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Error inside Serial.() when I change to Size(x,y) to P3D

December 31, 2012, 1:08 am
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I have a sketch that uses serial communication to get data from an arduino.
It also displays a circle on the screen as part of a calibration routine.
It works fine, but I decided it would look a little cooler to make the circle (ellipse) into a sphere
so I tried simply changing
 
size(currentWindowX, currentWindowY);
 
to
size(currentWindowX, currentWindowY,P3D);
 
so that I can use the sphere command
 
 
but just adding P3D to my size(x,y) line gave me the following error.  If I get rid of the P3D it immediately works fine again????  Is there an issue with serial in P3D mode????
 
 
Error inside Serial.<init>()
 
Here is the error log:
Stable Library
=========================================
Native lib Version = RXTX-2.1-7
Java lib Version   = RXTX-2.1-7
[0] "COM6"
[1] "COM10"
  Connecting to -> COM6
[0] "COM6"
[1] "COM10"
  Connecting to -> COM6
gnu.io.PortInUseException: Unknown Application
 at gnu.io.CommPortIdentifier.open(CommPortIdentifier.java:354)
 at processing.serial.Serial.<init>(Unknown Source)
 at processing.serial.Serial.<init>(Unknown Source)
 at ProcessingALIRELATIVEBETA3.setup(ProcessingALIRELATIVEBETA3.java:126)
 at processing.core.PApplet.handleDraw(PApplet.java:2117)
 at processing.opengl.PGL$PGLListener.display(PGL.java:2472)
 at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:548)
 at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:533)
 at jogamp.opengl.GLAutoDrawableBase$2.run(GLAutoDrawableBase.java:280)
 at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:904)
 at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:822)
 at com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:543)
 at processing.opengl.PGL.requestDraw(PGL.java:814)
 at processing.opengl.PGraphicsOpenGL.requestDraw(PGraphicsOpenGL.java:1566)
 at processing.core.PApplet.run(PApplet.java:2020)
 at java.lang.Thread.run(Thread.java:662)
java.lang.NullPointerException
 at processing.mode.java.runner.Runner.findException(Runner.java:707)
 at processing.mode.java.runner.Runner.reportException(Runner.java:652)
 at processing.mode.java.runner.Runner.exception(Runner.java:595)
 at processing.mode.java.runner.EventThread.exceptionEvent(EventThread.java:367)
 at processing.mode.java.runner.EventThread.handleEvent(EventThread.java:255)
 at processing.mode.java.runner.EventThread.run(EventThread.java:89)
Exception in thread "Animation Thread" java.lang.RuntimeException: Error inside Serial.<init>()
 at processing.serial.Serial.errorMessage(Unknown Source)
 at processing.serial.Serial.<init>(Unknown Source)
 at processing.serial.Serial.<init>(Unknown Source)
 at ProcessingALIRELATIVEBETA3.setup(ProcessingALIRELATIVEBETA3.java:126)
 at processing.core.PApplet.handleDraw(PApplet.java:2117)
 at processing.opengl.PGL$PGLListener.display(PGL.java:2472)
 at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:548)
 at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:533)
 at jogamp.opengl.GLAutoDrawableBase$2.run(GLAutoDrawableBase.java:280)
 at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:904)
 at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:822)
 at com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:543)
 at processing.opengl.PGL.requestDraw(PGL.java:814)
 at processing.opengl.PGraphicsOpenGL.requestDraw(PGraphicsOpenGL.java:1566)
 at processing.core.PApplet.run(PApplet.java:2020)
 at java.lang.Thread.run(Thread.java:662)
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Re : No font in exported PDF

December 31, 2012, 3:06 am
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Indeed, the PDF doesn't embed the font, and the PDF reference doesn't tell it should do it...
At work, we use iText (the library generating the PDF) in Java2D mode (ie. drawing on a PDF surface instead of a classical Java2D / Swing surface) to generate a PDF, and we have a similar issue.
From my initial searches, we have to specify the directory where the fonts are, which is very annoying for a portable program (that must run on any system). In Processing, if the font is on the data folder, it might be easier. But you still have to mess with iText directly, which might be difficult from Processing (I haven't tried).
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Re : Error inside Serial.() when I change to Size(x,y) to P3D

December 31, 2012, 3:41 am
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Is size() the first line of setup()?
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Re : No font in exported PDF

December 31, 2012, 12:10 pm
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Yeah, the PDF Export library page doesn't tell you a whole lot. It is mostly very confusing. The code examples are somewhat inconsitent and there is no real reference material. Just examples. I set out to try the example code to see which example might work. I modified the first one and, to my surprise, it worked.

  1. import processing.pdf.*;

    void setup() {
        size(400,    400, PDF,    "filename.pdf");
    }

    void draw()    {
        // Draw    something    good here

        PFont    f;
        textAlign(CENTER);
        f    =    createFont("Times New Roman",    40);
        textFont(f,    40);
        background(255);
        String message = "Times New Roman text along a curve";
       
        // The radius of a circle
        float r = 100;
        // Start in    the    center and draw    the    circle
        translate(width    /    2, height    /    2);
        noFill();
        stroke(0);
        ellipse(0, 0,    r*2, r*2);

        // We    must keep    track    of our position    along    the    curve
        float    arclength    =    0;

        // For every box
        for    (int i = 0;    i    <    message.length();    i++)
        {
            // Instead of    a    constant width,    we check the width of    each character.
            char currentChar = message.charAt(i);
            float    w    =    textWidth(currentChar);

            // Each    box    is centered    so we    move half    the    width
            arclength    += w/2;
            // Angle in    radians    is the arclength divided by    the    radius
            // Starting    on the left    side of    the    circle by    adding PI
            float    theta    =    PI + arclength / r;         

            pushMatrix();
            // Polar to    cartesian    coordinate conversion
            translate(r*cos(theta),    r*sin(theta));
            // Rotate    the    box
            rotate(theta+PI/2);    // rotation    is offset    by 90    degrees
            // Display the character
            fill(0);
            text(currentChar,0,0);
            popMatrix();
            // Move    halfway    again
            arclength    += w/2;
        }

        // Exit    the    program   
        println("Finished.");
        exit();
    }

Sort of.



I do get the selected font to display in the PDF now but it is still not embedded. I printed the output PDF to another PDF using NitroPDF and it embedded the font but it was the wrong font. So if I send it to say, a service provider, it may not print correctly. I tried different fonts but NitroPDF always embeds TrueType CourierNew, which I believe is the default font I was getting before. So problem still not entirely solved. I wonder how Acrobat is getting the font information if it is not embedded.
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Re : Using Noise in Video Input

December 31, 2012, 12:43 pm
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I'm surprised no one got to you in a year. I just came by this by chance. Nice code. Very interesting approach. If you haven't already, you should take a look at the optical flow sketch by Hidetoshi Simodaira it very neatly demonstrates how to use bit shifting to get diffs in rgb values to detect movement, flow etc. It's a trip. I spent a couple years mastering the technique. Though my thunder was all stolen by the Kinect hacking story. I do plan to release something based upon optical flow, some day. 


Enjoy, 


in the comments of the sketch I left a link to the version I "tweaked" to make it run under 2.0x. 


Sid
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Re : How to port old PGraphicsOpenGL code to Processing 2 alpha - Additive Blending

December 31, 2012, 2:40 pm
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also, is anyone else getting this weird image noise on the start of their sketch?  seems to be a visual leftover from the last time the sketch was exited.  didn't get it in 2.0b6, but i am getting it in 2.0b7...


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Re : Long delay in Processing and Arduino Serial

December 31, 2012, 5:58 pm
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Hi all,

I just encountered this Processing/Arduino bug recently.  My serial code, which was working properly with earlier versions of Processing/Arduino, now suffers from huge delays.  My Processing code doesn't wait for a reply from Arduino.  It only checks if the serial port is open during the draw() loop.  I've also tried simply writing to the serial port without checking as well.

If the USB FTDI adapter is plugged in (whether the Arduino is powered or not) the delay occurs.  When I pull the FTDI or disable the Processing serial code, it runs fine.

Hmmm.

Michael
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Re : No font in exported PDF

January 1, 2013, 5:17 am
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My understanding of PDF: basically, unless specifically told, it uses bases fonts that Acrobat always has, for portability reasons.
I used a baroque font not installed on my system: it was displayed on screen, but not when I viewed the PDF in a reader.
If I use a font present on my system (instead of in the data folder), it displayed it correctly in the sketch too, but the resulting PDF lacked it.

I think PDF can store the text as curves (if the program generating the PDF told it so), but that's good only for small texts.
I believe it can store the font name, and reuse it if present on the system, but it doesn't seem to do so with Processing generation.
And indeed, it is supposed to be able to embed the font, if its licenses allows it (some are not redistributable). But as I said, it might take some special care with iText, particularly in Java2D mode (the mode used by Processing).
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Re : JavaSound Minim Errors

January 1, 2013, 8:59 am
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I'm getting these errors even with the RecordAudioInput example from the minim library.  The sketch spits out these errors when I save the file.  Again, recording and saving both work fine, sound fine, but the errors persist.  This seems like a bug to me... I guess I could dig through the minim code to see what generates this error...
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