# Latest

**URL:** https://discourse.processing.org/latest.md?no_subcategories=false&page=604

[Latest](https://discourse.processing.org/latest.md) · [Categories](https://discourse.processing.org/categories.md) · [Tags](https://discourse.processing.org/tags.md)

**Page:** 605

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## [Ignore changes to matrix](https://discourse.processing.org/t/ignore-changes-to-matrix/1917)

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**Author:** [@ffd8](https://discourse.processing.org/u/ffd8)\
**Replies:** 4\
**Last updated:** [July 19, 2018, 6:55pm UTC](https://discourse.processing.org/t/ignore-changes-to-matrix/1917 "2018-07-19T18:55:18Z")

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Is there a clever way to ignore/reset any changes to the matrix that happen outside of a push/popMatrix? Say I draw some objects normally using push/popMatrix(), then I’m calculating various things and have some debug vi…

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## [Print the value of a function](https://discourse.processing.org/t/print-the-value-of-a-function/1902)

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**Author:** [@Javier](https://discourse.processing.org/u/Javier)\
**Replies:** 3\
**Last updated:** [July 19, 2018, 4:59pm UTC](https://discourse.processing.org/t/print-the-value-of-a-function/1902 "2018-07-19T16:59:25Z")

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Hi all¡¡ I have defined a very simple function that transfer fahrenheit to celsius and I want to introduce as a variable the Fharenheit and return Celsius. I would like to print the value of the Celsius but i cant undest…

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## [Getting a P5.js sketch to play sound on an iOS device](https://discourse.processing.org/t/getting-a-p5-js-sketch-to-play-sound-on-an-ios-device/1907)

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**Author:** [@angeltapes](https://discourse.processing.org/u/angeltapes)\
**Replies:** 1\
**Last updated:** [July 19, 2018, 3:43pm UTC](https://discourse.processing.org/t/getting-a-p5-js-sketch-to-play-sound-on-an-ios-device/1907 "2018-07-19T15:43:22Z")

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Hi all I’ve made some audio experiements with p5.js and the sound library - https://angeltapes.github.io/Dwalm/ I’d like to use these on my iOS device (iPhone 6s) but I can’t get any sounds to work, either in Safari or…

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## [Server-\>client reply](https://discourse.processing.org/t/server-client-reply/1877)

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**Author:** [@giulio](https://discourse.processing.org/u/giulio)\
**Replies:** 24\
**Last updated:** [July 19, 2018, 3:39pm UTC](https://discourse.processing.org/t/server-client-reply/1877 "2018-07-19T15:39:23Z")

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I’m using the Network library. My Processing sketch opens a server. From external programs, I start one or more clients, which can send “commands” to the server, to make it doing something. This works fine. My question …

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## [Colouring rectangles with distance function](https://discourse.processing.org/t/colouring-rectangles-with-distance-function/1897)

<div class="topic-metadata">

**Author:** [@Javier](https://discourse.processing.org/u/Javier)\
**Replies:** 4\
**Last updated:** [July 19, 2018, 12:57pm UTC](https://discourse.processing.org/t/colouring-rectangles-with-distance-function/1897 "2018-07-19T12:57:27Z")

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Hi all¡ I am trying to add colours to 4 rectangles on the screen. To dod that I am learning how to create my own functions so i will use the distance from some of this rectangle to the mouseX and mouseY coordinates to a…

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## [Dispose() implementation](https://discourse.processing.org/t/dispose-implementation/1899)

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**Author:** [@Manuel](https://discourse.processing.org/u/Manuel)\
**Replies:** 0\
**Last updated:** [July 19, 2018, 11:10am UTC](https://discourse.processing.org/t/dispose-implementation/1899 "2018-07-19T11:10:53Z")

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Hi, I’m currently using in my proyect a library that provides a dispose() method that I believe right now is never called, I instantiate objects of that library within the classes on my sketch, so I don’t know how exactl…

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## [Processing won't launch 3.3.7 Windows 10](https://discourse.processing.org/t/processing-wont-launch-3-3-7-windows-10/1893)

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**Author:** [@DevilishTruthStare](https://discourse.processing.org/u/DevilishTruthStare)\
**Replies:** 2\
**Last updated:** [July 19, 2018, 5:30am UTC](https://discourse.processing.org/t/processing-wont-launch-3-3-7-windows-10/1893 "2018-07-19T05:30:05Z")

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I just downloaded processing and the program doesn’t launch. I read through this page and it seems like I should be able to just download the file, extract it and run the .exe, However when I do so, I get the loading scr…

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## [Testing for function keys in Processing 3.3.7](https://discourse.processing.org/t/testing-for-function-keys-in-processing-3-3-7/1891)

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**Author:** [@MCCreeper8890](https://discourse.processing.org/u/MCCreeper8890)\
**Replies:** 4\
**Last updated:** [July 19, 2018, 3:47am UTC](https://discourse.processing.org/t/testing-for-function-keys-in-processing-3-3-7/1891 "2018-07-19T03:47:03Z")

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I am developing a “simple” game based around the QueasyCam library. So far, I have implemented terrain generation and a skydome. The things I will put in next are player movement, third-person capability, surface physics…

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## [New p5 (native Python) release!](https://discourse.processing.org/t/new-p5-native-python-release/1881)

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**Author:** [@abhikpal](https://discourse.processing.org/u/abhikpal)\
**Replies:** 4\
**Last updated:** [July 18, 2018, 2:18pm UTC](https://discourse.processing.org/t/new-p5-native-python-release/1881 "2018-07-18T14:18:11Z")

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Hello everyone, we’ve been working on p5 (native python) for this year’s Summer of Code as well, and we’re happy to announce the first developmental release. Take a look at the full release here. Feel free to test this…

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## [FAQ forum page idea](https://discourse.processing.org/t/faq-forum-page-idea/1562)

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**Author:** [@kfrajer](https://discourse.processing.org/u/kfrajer)\
**Replies:** 3\
**Last updated:** [July 13, 2018, 7:01pm UTC](https://discourse.processing.org/t/faq-forum-page-idea/1562 "2018-07-13T19:01:09Z")

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Would it be possible to create a FAQ for the forum? Not sure if I sticky post would do it, or maybe an actual static site in the Processing website. I think the FAQ could have two sections, one related to forum (formatti…

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## [Placement of variables](https://discourse.processing.org/t/placement-of-variables/1875)

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**Author:** [@mattwonderwall](https://discourse.processing.org/u/mattwonderwall)\
**Replies:** 3\
**Last updated:** [July 18, 2018, 2:04pm UTC](https://discourse.processing.org/t/placement-of-variables/1875 "2018-07-18T14:04:07Z")

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I was following a course book on processing which wanted me to recreate an image: it wanted me to center a circle in each quarter of a square. It then wanted me to replace all the hard-coded numbers with variables. When …

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## [Create and display 3 platforms?](https://discourse.processing.org/t/create-and-display-3-platforms/1849)

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**Author:** [@meowrino](https://discourse.processing.org/u/meowrino)\
**Replies:** 2\
**Last updated:** [July 18, 2018, 12:17pm UTC](https://discourse.processing.org/t/create-and-display-3-platforms/1849 "2018-07-18T12:17:04Z")

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hey there! new user here! I’ve been following the book Learning Processing for a few months, and have finally arrived at the algorithms part. I wanted to try and use more less everything I’ve learned in coding a small p…

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## [Problem with width/2 and height/2](https://discourse.processing.org/t/problem-with-width-2-and-height-2/1869)

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**Author:** [@the-junk](https://discourse.processing.org/u/the-junk)\
**Replies:** 7\
**Last updated:** [July 18, 2018, 10:29am UTC](https://discourse.processing.org/t/problem-with-width-2-and-height-2/1869 "2018-07-18T10:29:36Z")

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Good evening, So, I want my snakePosX to be equal to width/2 and snakePosY to be equal to height/2. There is a bug in my code making my snakePosX and snakePosY equal to 50. I just want my snake to start in the middle o…

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## [How to make this boxes animation](https://discourse.processing.org/t/how-to-make-this-boxes-animation/1782)

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**Author:** [@carlwh123](https://discourse.processing.org/u/carlwh123)\
**Replies:** 13\
**Last updated:** [July 18, 2018, 6:53am UTC](https://discourse.processing.org/t/how-to-make-this-boxes-animation/1782 "2018-07-18T06:53:23Z")

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Hi guys, This is my first post here and I’m a beginner so I’m happy for you to explain anything you feel is relevant or link me any good resources. I have watched all the Daniel Shiffman (love that guy!) videos. I’m th…

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## [Sigma effect for image](https://discourse.processing.org/t/sigma-effect-for-image/1712)

<div class="topic-metadata">

**Author:** [@matheplica](https://discourse.processing.org/u/matheplica)\
**Replies:** 13\
**Last updated:** [July 18, 2018, 6:50am UTC](https://discourse.processing.org/t/sigma-effect-for-image/1712 "2018-07-18T06:50:59Z")

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Hi, I found a nice effect for video in vlc : sigma Here is the original There is a way to do the same with PImage, something like a filter?

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## [Searching for coding help in Processing3](https://discourse.processing.org/t/searching-for-coding-help-in-processing3/1851)

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**Author:** [@Timo.Oth](https://discourse.processing.org/u/Timo.Oth)\
**Replies:** 11\
**Last updated:** [July 18, 2018, 6:25am UTC](https://discourse.processing.org/t/searching-for-coding-help-in-processing3/1851 "2018-07-18T06:25:52Z")

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Hey there, I’m a little student from germany. I want to do a sketch in Processing for a “Configurator”. But i struggle a lot with coding in Processing. I posted a picture with the explanation. If someone can help me …

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## [Problem with text command](https://discourse.processing.org/t/problem-with-text-command/1838)

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**Author:** [@CS900](https://discourse.processing.org/u/CS900)\
**Replies:** 4\
**Last updated:** [July 18, 2018, 5:49am UTC](https://discourse.processing.org/t/problem-with-text-command/1838 "2018-07-18T05:49:41Z")

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Hi, I am trying to run a simple hangman game, and when the game ends I wanted the system to exit. To do this I inserted a delay after the screen ‘notified’ the user they had won or lost, and then used the exit command. B…

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## [Please delete this post](https://discourse.processing.org/t/please-delete-this-post/1870)

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**Author:** [@jdp123](https://discourse.processing.org/u/jdp123)\
**Replies:** 0\
**Last updated:** [July 18, 2018, 1:39am UTC](https://discourse.processing.org/t/please-delete-this-post/1870 "2018-07-18T01:39:48Z")

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please delete this post

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## [Unused variables](https://discourse.processing.org/t/unused-variables/1855)

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**Author:** [@jeffmarc](https://discourse.processing.org/u/jeffmarc)\
**Replies:** 2\
**Last updated:** [July 18, 2018, 5:46am UTC](https://discourse.processing.org/t/unused-variables/1855 "2018-07-18T05:46:53Z")

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the pde does not tell me or give me a list of unused variables declared but not used anywhere can i get this somehow when i run the sketch. it tells me if there is a variable it can’t find but i wanna know if i have on…

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## [Why is my javascript showing white?](https://discourse.processing.org/t/why-is-my-javascript-showing-white/1865)

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**Author:** [@ctrembla](https://discourse.processing.org/u/ctrembla)\
**Replies:** 3\
**Last updated:** [July 17, 2018, 10:23pm UTC](https://discourse.processing.org/t/why-is-my-javascript-showing-white/1865 "2018-07-17T22:23:15Z")

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I decided to start learning javascript & made a flappy bird, but after adding the pipes my screen was white. I’m using notepad ++ javascript here the html \<!DOCTYPE html\> \<html\> \<head\> \<meta charset="UTF-8"\> \<…

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## [Is it possible to load 400 photos of total size 85MB on android mode?](https://discourse.processing.org/t/is-it-possible-to-load-400-photos-of-total-size-85mb-on-android-mode/1804)

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**Author:** [@Yorgos](https://discourse.processing.org/u/Yorgos)\
**Replies:** 11\
**Last updated:** [July 17, 2018, 7:07pm UTC](https://discourse.processing.org/t/is-it-possible-to-load-400-photos-of-total-size-85mb-on-android-mode/1804 "2018-07-17T19:07:14Z")

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Hi. Is it possible to load 400 photos of total size 85 MB on android mode? The maximum number of photos I have managed to load is 90 pictures of total size 20 MB. If I load more I get “FATAL EXCEPTION: Animation Threa…

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## [Feedback for Processing on Raspberry Pi](https://discourse.processing.org/t/feedback-for-processing-on-raspberry-pi/460)

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**Author:** [@msurguy](https://discourse.processing.org/u/msurguy)\
**Replies:** 11\
**Last updated:** [July 17, 2018, 4:45pm UTC](https://discourse.processing.org/t/feedback-for-processing-on-raspberry-pi/460 "2018-07-17T16:45:18Z")

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Hello! We are a team of graduate students at University of Washington. We will be developing a website and a set of tools for using Processing on Raspberry Pi as a part of Google Summer of Code partnership with the Proce…

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## [Size of canvas controlP5](https://discourse.processing.org/t/size-of-canvas-controlp5/1805)

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**Author:** [@jimbojohn](https://discourse.processing.org/u/jimbojohn)\
**Replies:** 2\
**Last updated:** [July 17, 2018, 3:45pm UTC](https://discourse.processing.org/t/size-of-canvas-controlp5/1805 "2018-07-17T15:45:55Z")

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Hi everyone, I have been trying to change the size of the canvas in the controlP5 canvas example. The method addcanvas seems to have a setPositions() but not a setSize(). I wonder if anyone knows how to change the size? …

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## [Problem with ControlP5, Scrollablelist and align method](https://discourse.processing.org/t/problem-with-controlp5-scrollablelist-and-align-method/1808)

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**Author:** [@jb4x](https://discourse.processing.org/u/jb4x)\
**Replies:** 1\
**Last updated:** [July 17, 2018, 2:46pm UTC](https://discourse.processing.org/t/problem-with-controlp5-scrollablelist-and-align-method/1808 "2018-07-17T14:46:27Z")

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Hi everyone, I have trouble aligning text in a scrollable list in the ControlP5 library. Here is an example : import controlP5.\*; import java.util.\*; ControlP5 cp5; void setup() { size(400, 400); cp5 = new Contr…

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## [Toy Neural Networks in Processing](https://discourse.processing.org/t/toy-neural-networks-in-processing/1529)

<div class="topic-metadata">

**Author:** [@vadsavin](https://discourse.processing.org/u/vadsavin)\
**Replies:** 7\
**Last updated:** [July 17, 2018, 2:32pm UTC](https://discourse.processing.org/t/toy-neural-networks-in-processing/1529 "2018-07-17T14:32:43Z")

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I saw every Coding Train’s video about NN with P5 and i’ve tried to export his code into Prcossessing. Actually, it seems to work correctly with only one output node, otherwise it makes itself crazy. I’ve rewrite this c…

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## [Normalize Audio and Rect Height](https://discourse.processing.org/t/normalize-audio-and-rect-height/1816)

<div class="topic-metadata">

**Author:** [@KeremTurkyilmaz](https://discourse.processing.org/u/KeremTurkyilmaz)\
**Replies:** 2\
**Last updated:** [July 17, 2018, 2:21pm UTC](https://discourse.processing.org/t/normalize-audio-and-rect-height/1816 "2018-07-17T14:21:01Z")

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Hi, I’m trying to build a program which generates a waveform in the middle of the screen. I want to map the height of my rectangle, the minimum height must be 0, and the maximum must not overpass 50 px. The problem is…

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## [Questions for basic drawing program](https://discourse.processing.org/t/questions-for-basic-drawing-program/1819)

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**Author:** [@EnigmaRM](https://discourse.processing.org/u/EnigmaRM)\
**Replies:** 4\
**Last updated:** [July 17, 2018, 12:10pm UTC](https://discourse.processing.org/t/questions-for-basic-drawing-program/1819 "2018-07-17T12:10:58Z")

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pretty new to programming, so be easy on me please! Haha…I’m not sure what I am doing wrong, but I have two questions of things that don’t really affect the function of the program, but are annoying me. #1 is that while…

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## [G4P tabulator in textarea](https://discourse.processing.org/t/g4p-tabulator-in-textarea/1845)

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**Author:** [@MxFxM](https://discourse.processing.org/u/MxFxM)\
**Replies:** 2\
**Last updated:** [July 17, 2018, 11:34am UTC](https://discourse.processing.org/t/g4p-tabulator-in-textarea/1845 "2018-07-17T11:34:52Z")

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Hi there, if I copy paste some data from excel into the texteditor (windows standard) I get fromatted text wih tabulator as space between data. If I copy paste it into a G4P textArea I get no tabulator-spaces whatsoeve…

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## [Circle edge on mouse coordinates and increased size the father it gets from canvas center](https://discourse.processing.org/t/circle-edge-on-mouse-coordinates-and-increased-size-the-father-it-gets-from-canvas-center/1847)

<div class="topic-metadata">

**Author:** [@mattwonderwall](https://discourse.processing.org/u/mattwonderwall)\
**Replies:** 1\
**Last updated:** [July 17, 2018, 11:09am UTC](https://discourse.processing.org/t/circle-edge-on-mouse-coordinates-and-increased-size-the-father-it-gets-from-canvas-center/1847 "2018-07-17T11:09:41Z")

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I’ve just started programming and wanted to get a perfect circle edge to jump to the mouse edge. So the center of the circle would be the center of the canvas, and the closer you get to it, the smaller the circle gets an…

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## [Unable to form communication between processing and arduino](https://discourse.processing.org/t/unable-to-form-communication-between-processing-and-arduino/1771)

<div class="topic-metadata">

**Author:** [@ayesha](https://discourse.processing.org/u/ayesha)\
**Replies:** 2\
**Last updated:** [July 17, 2018, 9:23am UTC](https://discourse.processing.org/t/unable-to-form-communication-between-processing-and-arduino/1771 "2018-07-17T09:23:16Z")

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I am trying to form serial communication between arduino and processing. I am trying the simple code of hello world but it is not working on processing. I am getting ArrayIndexOutOfBoundsException: 1. Please help, I need…

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