Loading...
Logo
Processing Forum
  • Screen name:
    sillyexample
sillyexample's Profile
16 Posts
21 Responses
0 Followers

Activity Trend

Last 30 days
Show:
Private Message
  • setup() and draw() not being called in eclipse
    Hi,

    I am looking to create an android application in eclipse using the processing library.
    I want to use the wywiwyg editor for creating a menu while using processing's draw() function to display graphics based on user input.
    my problem is that if I use ...

    public void onCreate(Bundle savedInstanceState) {

    .. to create the menu, draw() and setup seem to be ignored.

    Is it possible to achieve what I am trying?

     

  • Image pixels issue on android
    Hi,

    I am getting a Nullpointer exception from the following. Any idea why?
    As you can see I have an if statement to make sure that the image is not null and it happens on first entry to the loop...

    1.   int r=0,g=0,b=0;
    2.   if(img!=null && img.width>-1){
    3.    for(int px=0;px<img.width;px++){
    4.      for(int py=0;py<img.height;py++){
    5.            int loc = px + py*img.width;
    6.            r+=red(img.pixels[loc]);
    7.           g+=green(img.pixels[loc]);
    8.           b+=blue(img.pixels[loc]);
    9.       }
    10.   }
    11.   }
    The error message is as follows:

    1. FATAL EXCEPTION: Animation Thread
    2. java.lang.NullPointerException
    3. at processing.test.sketchname.sketchname.function_name(sketchname.java:328)
    4. at processing.test.sketchname.sketchname.setup(sketchname.java:85)
    5. at processing.core.PApplet.handleDraw(Unknown Source)
    6. at processing.core.PGraphicsAndroid2D.requestDraw(Unknown Source)
    7. at processing.core.PApplet.run(Unknown Source)
    8. at java.lang.Thread.run(Thread.java:1019)


    Thanks

  • Image filter functions...
    Anybody got some good image filtering functions they want to share?
    Like the ones in photoshop under "Filters" (i.e. blur, sharpen, charcoal etc).
    I'm not a big fan of the ones in the processing library.


    Thanks
  • OutOfMemory PImage/PGraphics problem
    First off, I jus wanna say thanks to everybody on these forums for their help with the issues I have posted up in the past few weeks.

    Secondly, I have another issue..

    ( sample code in first reply)

    I am currently working on a drawing application that uses a png image as its "ink".
    The image is loaded into a PImage variable called "pen1" at the begining of the program.
    When the user pressed down on the mouse the image is drawn to a JAVA2D PGRAPHICS  at mousex,mousey.
    The image itself is only 20*20 pixels.

    Also, if i replace:
    1. image(pen1,mouseX,mouseY,20,20);
    with:
    1. rect(mouseX,mouseY,20,20);
    ..it works fine..


    It works fine for about 50-100 draws and then it crashes with the following error:

    2. An OutOfMemoryError means that your code is either using up too much memory
    3. because of a bug (e.g. creating an array that's too large, or unintentionally
    4. loading thousands of images), or that your sketch may need more memory to run.
    5. If your sketch uses a lot of memory (for instance if it loads a lot of data files)
    6. you can increase the memory available to your sketch using the Preferences window.
    7. Exception in thread "Animation Thread" java.lang.OutOfMemoryError: Java heap space
  • Copying an image by value (including transparency)
    Is there any way to this in processing without looping through pixel by pixel?

    say i have an image that keeps changing and I want to save an array of "snapshots"
    using pimage,get causes me problems because it only returns rgb and imgs[0] = pimage causes problems because it only references the image..


    any ideas?
    Thanks
  • Creating a layer (PGraphic/PImage)
    Hi,
    I am trying to create transparent layers,
    I can do it by drawing each graphic individually but this takes too long.

    To over come this problem I am trying to add all the graphics to PImages as soon as they are created.
    This has led me to start using PGraphics to draw the graphics onto and then copy those graphics into a PImage.
    The problem I am having is that I cannot get a transparent background on the PGraphics object from which I am copying the graphics.

    Below is some code that should highlight the issue:


    4.  
    5.  PGraphics pg;
    6.  PGraphics frame;
    7.  PApplet papp=this;
    8.  
    9.  public void setup(){
    10.  
    11.  size(800,800);
    12.  pg = createGraphics(papp.width, papp.height, JAVA2D);
    13.  pg.background(255);
    14.  }
    15.  
    16.  public void draw(){
    17.  pg.beginDraw();
    18.  pg.endDraw();
    19.  }
    20.  
    21.  public void mousePressed(){
    22.  
    23.  rect(0,0,200,200);
    24.  pg.beginDraw();
    25.  pg.stroke(34);
    26.  pg.fill(57);
    27.  pg.rect(mouseX,mouseY,50,50);
    28.  pg.line(25,25,67,89);
    29.  pg.endDraw();
    30.  PImage img=new PImage(papp.width,papp.height);
    31.  img=pg.get(0,0,300,300);
    32.  papp.image(img,20,20,0300,300);
    33.  
    34.  }
    35.  






    As you can see from running the above, it is setting a blue background for some unknown (to me) reason
  • Form/Panel/Layer resizing algorithm for processing.... (UI development)
    Hi,

    I'm currently working on an application using processing. I have built a custom UI but it has just one major flaw.
    As there can be a lot of graphics on screen at any one time, it doesn't make much sense to continuously redraw the complete screen for every frame when the mouse is pressed on the resize button for a form panel.

    My next step was to take a snap shot of any graphic heavy sections of the screen on every mouseReleased event and then display these instead while resizing a panel. This causes further issues as it may take up to a second to process the screenshot and can cause lags in other areas of the application. 


    Anybody have any experience in doing something like this or can think of any elegant solutions?


    Thanks
  • Default filetype loading for compiled sketch?
    I want to be able to open my sketch automatically for a certain file-type (say ".ttt") in the same way that if you double click a ".doc" file you will (probably) open Word.

    Is there any way I can set my sketch to take in a filename as an argument when it loads?


    Thanks
  • A few questions on Processing...
    Hi,

    I just have a few questions on Processing and thought it would be best to to just throw them all in one post:

    1: Is it possible to reference methods as variables like is done in JavaScript 
    i.e if(button.type=="close"){ button.action() = hide_parent(); }

    2. Is there any way to read in pasted images (like is done in photoshop and similar programs?

    3. is it possible to save a screenshot as an image file?



    Thanks
  • Is there any way to allow an array to store multiple data types
    I'm aware that there are some work arounds to this but nothing that I can come up with can really work the way I would like it to.

    Lets say i want to store both of the below classes (A and B) in the same array, how would I do it?

    2. class ALL{
    3. String type = "Basic";
    4. my_id=current_id;
    5. ALL(){ array[my_id]=this; current_id++;}
    6. }
    7. class A extends ALL{
    8. String type = "A type";
    9. my_id=current_id;
    10. A(){ array[my_id]=this; current_id++;}
    11. }

    13. class B extends ALL{
    14. String type = "B type";
    15. my_id=current_id;
    16. A(){ array[my_id]=this; current_id++;}
    17. }
    The above code is pretty much how I am going about doing it at the moment but it is giving me all sorts of problems.

    Any ideas??

    Thanks