# Processing

**URL:** https://discourse.processing.org/c/processing/6.md?no_subcategories=false&page=114

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

**Page:** 115

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## [How can my Chromebook students download Processing](https://discourse.processing.org/t/how-can-my-chromebook-students-download-processing/32151)

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**Author:** [@lnoss](https://discourse.processing.org/u/lnoss)\
**Replies:** 1\
**Last updated:** [September 8, 2021, 7:59am UTC](https://discourse.processing.org/t/how-can-my-chromebook-students-download-processing/32151 "2021-09-08T07:59:46Z")

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My students are new to programming and I use Processing in my CSP course. How can they download Processing to their Chromebooks?

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## [How to get Movie sound value?](https://discourse.processing.org/t/how-to-get-movie-sound-value/32149)

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**Author:** [@lindx](https://discourse.processing.org/u/lindx)\
**Replies:** 0\
**Last updated:** [September 8, 2021, 2:22am UTC](https://discourse.processing.org/t/how-to-get-movie-sound-value/32149 "2021-09-08T02:22:53Z")

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I can Play a MP4 of movie file, the movie sound can play in speakers. I want get movie sound value for display, My question is how to get movie numerical value of sound for make a value meter.

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## [Confine the wind in the screen without changing speed or degree](https://discourse.processing.org/t/confine-the-wind-in-the-screen-without-changing-speed-or-degree/32124)

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**Author:** [@Arabesque0210](https://discourse.processing.org/u/Arabesque0210)\
**Replies:** 3\
**Last updated:** [September 7, 2021, 8:56pm UTC](https://discourse.processing.org/t/confine-the-wind-in-the-screen-without-changing-speed-or-degree/32124 "2021-09-07T20:56:28Z")

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Hi there, I am new to processing and trying to create a floating text following wind data for my art project. I want to make sure this string is always in the screen like bouncing ball, however maybe cuz I use the real…

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## [How to completely reset processing](https://discourse.processing.org/t/how-to-completely-reset-processing/32140)

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**Author:** [@EinsMalteHH](https://discourse.processing.org/u/EinsMalteHH)\
**Replies:** 1\
**Last updated:** [September 7, 2021, 8:38pm UTC](https://discourse.processing.org/t/how-to-completely-reset-processing/32140 "2021-09-07T20:38:24Z")

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I want to reset processing because yeah, why not. Where are ale the files I need to delete?

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## [Saving data in Processing](https://discourse.processing.org/t/saving-data-in-processing/32136)

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**Author:** [@nyeas001](https://discourse.processing.org/u/nyeas001)\
**Replies:** 6\
**Last updated:** [September 7, 2021, 7:24pm UTC](https://discourse.processing.org/t/saving-data-in-processing/32136 "2021-09-07T19:24:57Z")

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Hi, I am trying to save data in a table in processing. Data is pressure sensor data collected through serial monitor of Arduino. I am getting a error message which I could not resolve. Code import processing.serial.\*;…

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## [ControlP5, How to set the maximum number of characters in a Text Field?](https://discourse.processing.org/t/controlp5-how-to-set-the-maximum-number-of-characters-in-a-text-field/32062)

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**Author:** [@jhsa](https://discourse.processing.org/u/jhsa)\
**Replies:** 19\
**Last updated:** [September 7, 2021, 5:34pm UTC](https://discourse.processing.org/t/controlp5-how-to-set-the-maximum-number-of-characters-in-a-text-field/32062 "2021-09-07T17:34:56Z")

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I would like to allow a user to insert a maximum of 10 characters in the text field… Been looking and cannot find any option for that. Researched online, found nothing. Thank you for your help.

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## [Getting a SoundFile as a copy. (SoundFile.copy() nonexistant)](https://discourse.processing.org/t/getting-a-soundfile-as-a-copy-soundfile-copy-nonexistant/32064)

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**Author:** [@Mattyjak](https://discourse.processing.org/u/Mattyjak)\
**Replies:** 6\
**Last updated:** [September 7, 2021, 1:45pm UTC](https://discourse.processing.org/t/getting-a-soundfile-as-a-copy-soundfile-copy-nonexistant/32064 "2021-09-07T13:45:14Z")

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Hello everyone! It’s Matty here, back with another question in regards to Processing. I’m messing around with sound right now, and I wanted to know if there was an easy way to ‘clone’ or copy a soundfile object? I know…

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## [How can I create objects to make this work? (Spaceships)](https://discourse.processing.org/t/how-can-i-create-objects-to-make-this-work-spaceships/32017)

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**Author:** [@lucaswoah](https://discourse.processing.org/u/lucaswoah)\
**Replies:** 2\
**Last updated:** [September 6, 2021, 9:02pm UTC](https://discourse.processing.org/t/how-can-i-create-objects-to-make-this-work-spaceships/32017 "2021-09-06T21:02:33Z")

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So, I’m making this minigame where you have many spaceships on screen and their lights go out when you click them. I was able to make it work when you click the third spaceship (from the top to the bottom), but when I cl…

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## [Drawing circles in random sequence](https://discourse.processing.org/t/drawing-circles-in-random-sequence/32077)

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**Author:** [@jsco](https://discourse.processing.org/u/jsco)\
**Replies:** 14\
**Last updated:** [September 6, 2021, 7:53pm UTC](https://discourse.processing.org/t/drawing-circles-in-random-sequence/32077 "2021-09-06T19:53:13Z")

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Hi, so I am just a beginner, so this may be a silly question. But in searching, I haven’t quite found what I want. I have a bunch of ellipses being drawn. Now I know they are drawn in the sequence they are written from …

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## [Where did the (P)Shader tutorial go?](https://discourse.processing.org/t/where-did-the-p-shader-tutorial-go/32090)

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**Author:** [@rapatski](https://discourse.processing.org/u/rapatski)\
**Replies:** 3\
**Last updated:** [September 6, 2021, 7:22pm UTC](https://discourse.processing.org/t/where-did-the-p-shader-tutorial-go/32090 "2021-09-06T19:22:11Z")

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Hi there! I remember this super helpful tutorial on PShader and shader 101, which I believe was either done by Andres Colubri, or by one of the newer kids on the block, going over how to set up your vertex an pixel sha…

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## [Guibuilder -\> Event -\> NullPointerException](https://discourse.processing.org/t/guibuilder-event-nullpointerexception/32104)

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**Author:** [@Student001](https://discourse.processing.org/u/Student001)\
**Replies:** 1\
**Last updated:** [September 5, 2021, 4:05pm UTC](https://discourse.processing.org/t/guibuilder-event-nullpointerexception/32104 "2021-09-05T16:05:33Z")

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Hi! this code produces a NullPointerException: public void tf\_step\_delay\_change(GTextField source, GEvent event) { //\_CODE\_:tf\_step\_delay:234478: if(event == GEvent.ENTERED){ slider\_step\_delay.setValue(Integer.v…

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## [Making rects disappear on touch](https://discourse.processing.org/t/making-rects-disappear-on-touch/32094)

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**Author:** [@Kenga123456](https://discourse.processing.org/u/Kenga123456)\
**Replies:** 2\
**Last updated:** [September 5, 2021, 4:16pm UTC](https://discourse.processing.org/t/making-rects-disappear-on-touch/32094 "2021-09-05T16:16:17Z")

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float xOffset = 0.0; float yOffset = 0.0; int rectSize = 30; int ellipseX = 90; int ellipseY = 320; int ellipseSize = 30; int boxPosX = 250; int boxPosY = 130; int spacingX = 45; int spacingY = 45; boolean ellipse…

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## [How to force chrome to open a link?](https://discourse.processing.org/t/how-to-force-chrome-to-open-a-link/31617)

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**Author:** [@CodeMasterX](https://discourse.processing.org/u/CodeMasterX)\
**Replies:** 3\
**Last updated:** [September 5, 2021, 8:30pm UTC](https://discourse.processing.org/t/how-to-force-chrome-to-open-a-link/31617 "2021-09-05T20:30:35Z")

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Hi! I have been using a website that takes forever to load and has several other issues. I want to generate links and force them to open in browser. How can I do it (preferably in processing). I would prefer for it to be…

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## [Apps in Login Items on Mac do not launch](https://discourse.processing.org/t/apps-in-login-items-on-mac-do-not-launch/31995)

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**Author:** [@GeorgeRoland](https://discourse.processing.org/u/GeorgeRoland)\
**Replies:** 13\
**Last updated:** [September 5, 2021, 11:42pm UTC](https://discourse.processing.org/t/apps-in-login-items-on-mac-do-not-launch/31995 "2021-09-05T23:42:41Z")

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I am using a Macintosh When I place a Processing App in the Login Items to launch at startup, it does not launch. The App icon appears in the Dock and bounces a couple of times as though it is starting to launch, but t…

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## [Frozen Pixels in Shaders?](https://discourse.processing.org/t/frozen-pixels-in-shaders/32038)

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**Author:** [@bwerness](https://discourse.processing.org/u/bwerness)\
**Replies:** 10\
**Last updated:** [September 5, 2021, 7:55pm UTC](https://discourse.processing.org/t/frozen-pixels-in-shaders/32038 "2021-09-05T19:55:31Z")

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Hello, I’m a long time Processing user and I’m currently getting extremely strange behavior from a shader I’m developing. I’ve stripped it down to the core, and I’ve simply never seen anything similar. When using the …

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## [Chroma Library verification](https://discourse.processing.org/t/chroma-library-verification/32072)

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**Author:** [@paulstgeorge](https://discourse.processing.org/u/paulstgeorge)\
**Replies:** 2\
**Last updated:** [September 5, 2021, 6:06pm UTC](https://discourse.processing.org/t/chroma-library-verification/32072 "2021-09-05T18:06:37Z")

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If you go to \<https://github.com/neilpanchal/Chroma\> then scroll down to the section called Motivation, you will see an image. The text states, “The bottom row is generated in CIE-LCH color space by setting Luminosit…

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## [Text indicator not in the right place](https://discourse.processing.org/t/text-indicator-not-in-the-right-place/32073)

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**Author:** [@KaliBrain](https://discourse.processing.org/u/KaliBrain)\
**Replies:** 3\
**Last updated:** [September 5, 2021, 5:12pm UTC](https://discourse.processing.org/t/text-indicator-not-in-the-right-place/32073 "2021-09-05T17:12:57Z")

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This issue has nothing to do with code, it has to do with the text editor. I use Processing 4.0b1 64 bits on a windows 10 laptop… The program works fine except for the text indicator (the one that blinks and tells you …

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## [Best cheap setup for (audio reactive) live visuals](https://discourse.processing.org/t/best-cheap-setup-for-audio-reactive-live-visuals/31550)

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**Author:** [@Grau](https://discourse.processing.org/u/Grau)\
**Replies:** 2\
**Last updated:** [September 5, 2021, 4:25pm UTC](https://discourse.processing.org/t/best-cheap-setup-for-audio-reactive-live-visuals/31550 "2021-09-05T16:25:23Z")

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Hey, I want to delve into live visuals for my music projects. For that I would need a new computer, because I’d like to keep my audio and video systems separate. I’m new to processing and visuals. As far as I understan…

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## [Convert PImage to byte array](https://discourse.processing.org/t/convert-pimage-to-byte-array/20268)

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**Author:** [@Marce](https://discourse.processing.org/u/Marce)\
**Replies:** 17\
**Last updated:** [September 5, 2021, 10:23am UTC](https://discourse.processing.org/t/convert-pimage-to-byte-array/20268 "2021-09-05T10:23:19Z")

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Hi ! I’m looking for a way to convert a Pimage to a byte array. I feel like this should be a pretty common things to do, and I tried plenty of things found online but, not a single one seems to work. If anyone knows h…

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## [Runtime Library Installed, but not found? (Win10, Processing 4)](https://discourse.processing.org/t/runtime-library-installed-but-not-found-win10-processing-4/31937)

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**Author:** [@ScottW1](https://discourse.processing.org/u/ScottW1)\
**Replies:** 5\
**Last updated:** [September 5, 2021, 9:52am UTC](https://discourse.processing.org/t/runtime-library-installed-but-not-found-win10-processing-4/31937 "2021-09-05T09:52:43Z")

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I am running Processing 4.0b1 on Win10x64. When I “export application” and choose the “Embed Java” option, the .exe launches and runs fine. However… When I “export application” and do NOT choose “Embed Java”, clicking…

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## [Starting from straight line and curling into a spiral](https://discourse.processing.org/t/starting-from-straight-line-and-curling-into-a-spiral/32084)

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**Author:** [@endymion](https://discourse.processing.org/u/endymion)\
**Replies:** 3\
**Last updated:** [September 4, 2021, 11:35pm UTC](https://discourse.processing.org/t/starting-from-straight-line-and-curling-into-a-spiral/32084 "2021-09-04T23:35:23Z")

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Hi, I want to create a simple animation that starts with a line and the line slowly curls into a spiral. I thought initially that I might be able to do this by making multiple curveVertex segments and rotating the coordi…

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## [Rect not showing](https://discourse.processing.org/t/rect-not-showing/32092)

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**Author:** [@Kenga123456](https://discourse.processing.org/u/Kenga123456)\
**Replies:** 1\
**Last updated:** [September 4, 2021, 6:18pm UTC](https://discourse.processing.org/t/rect-not-showing/32092 "2021-09-04T18:18:25Z")

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int rectY = 400; int rectX = 100; void setup () { size (500, 350); } void draw() { background (0); fill(255, 100, 100); rect(rectX, rectY, 100, 100); } this is my code, I dont know what I did wrong. Probably…

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## [Unable to update pixels from text file containing pixel locations](https://discourse.processing.org/t/unable-to-update-pixels-from-text-file-containing-pixel-locations/2021)

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**Author:** [@socraticbot](https://discourse.processing.org/u/socraticbot)\
**Replies:** 8\
**Last updated:** [September 4, 2021, 6:01pm UTC](https://discourse.processing.org/t/unable-to-update-pixels-from-text-file-containing-pixel-locations/2021 "2021-09-04T18:01:15Z")

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Hi all, I wrote a program in Processing which writes the 1D coordinates of black pixels in an image to a text file. I wrote a second program which should read the text file and recreate the black pixels on a white imag…

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## [Overlay video on PNG (w/ transparent bg) =\> Sequence of PNGs](https://discourse.processing.org/t/overlay-video-on-png-w-transparent-bg-sequence-of-pngs/32054)

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**Author:** [@ishback](https://discourse.processing.org/u/ishback)\
**Replies:** 1\
**Last updated:** [September 4, 2021, 11:01am UTC](https://discourse.processing.org/t/overlay-video-on-png-w-transparent-bg-sequence-of-pngs/32054 "2021-09-04T11:01:12Z")

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Hello, I’m trying to overlay a video (played at a size let’s say 50x50pixels) on top of a PNG with transparent background. My goal is to get a GIF out of it, for which I’d probably need to save a PNG for each frame. I’…

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## [Graphing analog sensor data from Arduino in Processing](https://discourse.processing.org/t/graphing-analog-sensor-data-from-arduino-in-processing/32078)

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**Author:** [@nyeas001](https://discourse.processing.org/u/nyeas001)\
**Replies:** 2\
**Last updated:** [September 4, 2021, 9:08am UTC](https://discourse.processing.org/t/graphing-analog-sensor-data-from-arduino-in-processing/32078 "2021-09-04T09:08:35Z")

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Hi, I am totally new in processing. I was following some of the you tube materials to familiarize myself with processing.I wanted to plot a graph of analog sensor using arduino. But I am getting error and I could not f…

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## [Vignette effect only being applied vertically](https://discourse.processing.org/t/vignette-effect-only-being-applied-vertically/32071)

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**Author:** [@raspberrybrick](https://discourse.processing.org/u/raspberrybrick)\
**Replies:** 2\
**Last updated:** [September 4, 2021, 1:51am UTC](https://discourse.processing.org/t/vignette-effect-only-being-applied-vertically/32071 "2021-09-04T01:51:55Z")

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Hello, Currently I am trying to create a vignette effect, and have been somewhat successful. Most tutorials/examples I have found are either black and white, or use the point() function to draw each pixel. However neit…

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## [How to save an animated moving image in processing](https://discourse.processing.org/t/how-to-save-an-animated-moving-image-in-processing/32075)

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**Author:** [@Stella9](https://discourse.processing.org/u/Stella9)\
**Replies:** 1\
**Last updated:** [September 3, 2021, 6:39pm UTC](https://discourse.processing.org/t/how-to-save-an-animated-moving-image-in-processing/32075 "2021-09-03T18:39:36Z")

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Hello, I would to know how to save a animation as a gif files or png on processing. I created a an animation into two tab on processing : Excuse me for my mistake, English is not my mother language.

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## [B-splines implementation](https://discourse.processing.org/t/b-splines-implementation/31991)

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**Author:** [@molo32](https://discourse.processing.org/u/molo32)\
**Replies:** 2\
**Last updated:** [September 2, 2021, 10:11pm UTC](https://discourse.processing.org/t/b-splines-implementation/31991 "2021-09-02T22:11:42Z")

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I am trying to draw a b-spline, i don’t want to use third party libraries I want to implement it myself., the code below does not work correctly. control point px \[0\] p and \[0\] appears to be at 0.0. but it should be x …

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## [Gradient with lines](https://discourse.processing.org/t/gradient-with-lines/32035)

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**Author:** [@humano](https://discourse.processing.org/u/humano)\
**Replies:** 4\
**Last updated:** [September 2, 2021, 7:37pm UTC](https://discourse.processing.org/t/gradient-with-lines/32035 "2021-09-02T19:37:07Z")

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Hi there! I have found an interesting way to create gradients with lines in a tutorial. size (900, 900); background (255); colorMode(HSB,360,100,100); for (int i = 0; i \< 300; i++) { stroke(i,100,100); line(0, i, 1000,…

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## [Using Processing to create a visual numeric keyboard for Arduino](https://discourse.processing.org/t/using-processing-to-create-a-visual-numeric-keyboard-for-arduino/32060)

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**Author:** [@Norac](https://discourse.processing.org/u/Norac)\
**Replies:** 2\
**Last updated:** [September 2, 2021, 5:01pm UTC](https://discourse.processing.org/t/using-processing-to-create-a-visual-numeric-keyboard-for-arduino/32060 "2021-09-02T17:01:35Z")

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I create a code to use the Processing interface as a numeric Keyboard for my arduino Mega. It works just fine i keep becoming this warning. can somebody tell me what i did wrong? :face\_with\_raised\_eyebrow: import contro…

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