# Processing

**URL:** https://discourse.processing.org/c/processing/6.md?page=131

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

**Page:** 132

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## [Is there a way to stop the register method?](https://discourse.processing.org/t/is-there-a-way-to-stop-the-register-method/30107)

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**Author:** [@Flolo](https://discourse.processing.org/u/Flolo)\
**Replies:** 1\
**Last updated:** [May 15, 2021, 12:50pm UTC](https://discourse.processing.org/t/is-there-a-way-to-stop-the-register-method/30107 "2021-05-15T12:50:23Z")

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Hey it’s me again i wanted to ask how to remove the register method. Because it now calls for every object created in the background and I don’t want that. Here is a small example that I made. The function destroy () …

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## [Drawing a spectogram 2D (or 3D) from a recorded audio](https://discourse.processing.org/t/drawing-a-spectogram-2d-or-3d-from-a-recorded-audio/25708)

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**Author:** [@humus](https://discourse.processing.org/u/humus)\
**Replies:** 25\
**Last updated:** [May 11, 2021, 2:39pm UTC](https://discourse.processing.org/t/drawing-a-spectogram-2d-or-3d-from-a-recorded-audio/25708 "2021-05-11T14:39:22Z")

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please format code with \</\> button \* homework policy \* asking questions Hi Everybody, is there any code to do what in the object of the discussion? Thanks Best regards Roberto

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## [Making a keyPressed do a launch and launch sequence?](https://discourse.processing.org/t/making-a-keypressed-do-a-launch-and-launch-sequence/30077)

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**Author:** [@yagirl\_belle](https://discourse.processing.org/u/yagirl_belle)\
**Replies:** 2\
**Last updated:** [May 14, 2021, 2:48pm UTC](https://discourse.processing.org/t/making-a-keypressed-do-a-launch-and-launch-sequence/30077 "2021-05-14T14:48:03Z")

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Hey everyone, I’m trying to do a launch sequence by pressing the same key twice. 1st press = start launch, 2nd press = launch object I’m not certain how to do this and what I need to use. I’m using booleans to run the …

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## [Need coding ideas](https://discourse.processing.org/t/need-coding-ideas/30095)

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**Author:** [@CodeMasterX](https://discourse.processing.org/u/CodeMasterX)\
**Replies:** 7\
**Last updated:** [May 14, 2021, 2:13pm UTC](https://discourse.processing.org/t/need-coding-ideas/30095 "2021-05-14T14:13:30Z")

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(I don’t know what tag to set, so I just set Processing) Does anyone have any fun coding challenges to do? Perhaps a website or something like that. Preferably some simple games, since they are usually interesting with …

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## [Making an object stop, and move forward when key pressed (power bar)](https://discourse.processing.org/t/making-an-object-stop-and-move-forward-when-key-pressed-power-bar/29936)

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**Author:** [@Trish](https://discourse.processing.org/u/Trish)\
**Replies:** 3\
**Last updated:** [May 13, 2021, 8:26pm UTC](https://discourse.processing.org/t/making-an-object-stop-and-move-forward-when-key-pressed-power-bar/29936 "2021-05-13T20:26:13Z")

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Hello, I’m trying to code a ball that, when the program is executed, moves side to side. When a key is pressed (and held down), a power bar appears displaying how much power the ball is going to shoot with when the key i…

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## [How to draw a circle in 3D when i have an array of n points that lay on the circle](https://discourse.processing.org/t/how-to-draw-a-circle-in-3d-when-i-have-an-array-of-n-points-that-lay-on-the-circle/30083)

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**Author:** [@knoedel](https://discourse.processing.org/u/knoedel)\
**Replies:** 2\
**Last updated:** [May 13, 2021, 3:16pm UTC](https://discourse.processing.org/t/how-to-draw-a-circle-in-3d-when-i-have-an-array-of-n-points-that-lay-on-the-circle/30083 "2021-05-13T15:16:51Z")

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Hello everyone! I am working on a project where I want to visualize the Hopf Fibration using the stereographic projection from 4D onto 3D. The maths part is working fine, but I have problems plotting the circles in 3D …

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## [Change moving angle by changing the moving directions/speeds](https://discourse.processing.org/t/change-moving-angle-by-changing-the-moving-directions-speeds/30065)

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**Author:** [@helloscoopz](https://discourse.processing.org/u/helloscoopz)\
**Replies:** 12\
**Last updated:** [May 13, 2021, 3:12pm UTC](https://discourse.processing.org/t/change-moving-angle-by-changing-the-moving-directions-speeds/30065 "2021-05-13T15:12:00Z")

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void turn(float angle) { // need to change xSpeed and ySpeed so that object will move // with that changed angle } My problem is that I need to change the direction of the moving object counterclockwise with the a…

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## [Is there any feasible way to use a model created using teachable machine in processing?](https://discourse.processing.org/t/is-there-any-feasible-way-to-use-a-model-created-using-teachable-machine-in-processing/30085)

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**Author:** [@bontempos](https://discourse.processing.org/u/bontempos)\
**Replies:** 0\
**Last updated:** [May 13, 2021, 1:53pm UTC](https://discourse.processing.org/t/is-there-any-feasible-way-to-use-a-model-created-using-teachable-machine-in-processing/30085 "2021-05-13T13:53:59Z")

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I’m in between converting to P5 a huge amount of matrix calculations I made a while ago for processing… because, then, I can use the ml5 library with image classification. But that’s a bit silly if I can have a simple w…

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## [G4P ToggleButton (change state)](https://discourse.processing.org/t/g4p-togglebutton-change-state/30063)

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**Author:** [@Liu.Exit](https://discourse.processing.org/u/Liu.Exit)\
**Replies:** 3\
**Last updated:** [May 13, 2021, 9:34am UTC](https://discourse.processing.org/t/g4p-togglebutton-change-state/30063 "2021-05-13T09:34:16Z")

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Hello, is it possible to change the state of “G4P ToggleButton” other than with the mouse? (For example by receiving information from the serial port.) Thank you

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## [Implement friction and gravity in a simple Spring](https://discourse.processing.org/t/implement-friction-and-gravity-in-a-simple-spring/30070)

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**Author:** [@ikermorales](https://discourse.processing.org/u/ikermorales)\
**Replies:** 1\
**Last updated:** [May 12, 2021, 9:00pm UTC](https://discourse.processing.org/t/implement-friction-and-gravity-in-a-simple-spring/30070 "2021-05-12T21:00:45Z")

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Hello, Im trying to make a Spring in Proccesing, I need to add “friction” and “gravity” to my Spring to finish the project but I dont figure it out how. I have managed to get here, I have created a basic Spring, but I d…

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## [TicTacToe Game Support](https://discourse.processing.org/t/tictactoe-game-support/30050)

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**Author:** [@Syntax64](https://discourse.processing.org/u/Syntax64)\
**Replies:** 6\
**Last updated:** [May 12, 2021, 3:54pm UTC](https://discourse.processing.org/t/tictactoe-game-support/30050 "2021-05-12T15:54:22Z")

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What am I missing? Right Click works, but not Left Click. Most, if not all the code should be correct. Am i messing up a loop somewhere? I tried debugging but to no avail char\[\]\[\] mat; boolean xturn; void setup(){ siz…

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## [Calculating pmouseX and pmouseY (Kinect)](https://discourse.processing.org/t/calculating-pmousex-and-pmousey-kinect/30051)

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**Author:** [@l3ehfar](https://discourse.processing.org/u/l3ehfar)\
**Replies:** 5\
**Last updated:** [May 12, 2021, 9:39am UTC](https://discourse.processing.org/t/calculating-pmousex-and-pmousey-kinect/30051 "2021-05-12T09:39:35Z")

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Hey, I’ve got a visual which interacts with the mouseX, mouseY and pmouseX, pmouseY. I wanna change it into interacting with the Kinect body track, however my problem is that I have no idea about changing the pmouse valu…

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## [Data type for ArrayList get() function (class, OOP)](https://discourse.processing.org/t/data-type-for-arraylist-get-function-class-oop/30049)

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**Author:** [@MBMNGT](https://discourse.processing.org/u/MBMNGT)\
**Replies:** 5\
**Last updated:** [May 12, 2021, 9:31am UTC](https://discourse.processing.org/t/data-type-for-arraylist-get-function-class-oop/30049 "2021-05-12T09:31:31Z")

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Hi For Array List functions, I would like to know the type of data returned by the Particle part = particles.get(0) function ? after some try, ;;; it’s not float or int or string … so, what is ? Thank in advance Eric …

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## [Frame stepping with GStreamer StepEvent](https://discourse.processing.org/t/frame-stepping-with-gstreamer-stepevent/29993)

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**Author:** [@ermaciu](https://discourse.processing.org/u/ermaciu)\
**Replies:** 8\
**Last updated:** [May 11, 2021, 10:39pm UTC](https://discourse.processing.org/t/frame-stepping-with-gstreamer-stepevent/29993 "2021-05-11T22:39:48Z")

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Hey everyone. I’m trying to use Processing for analyzing movement manually in videos. Unfortunately the video library doesn’t appear to have frame-stepping functionality built in, and the suggested example of calculatin…

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## [Shiffman's Fourier Series](https://discourse.processing.org/t/shiffmans-fourier-series/29962)

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**Author:** [@HackinHarry](https://discourse.processing.org/u/HackinHarry)\
**Replies:** 2\
**Last updated:** [May 11, 2021, 10:28pm UTC](https://discourse.processing.org/t/shiffmans-fourier-series/29962 "2021-05-11T22:28:43Z")

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I’m going through the mess of sketches I have and found an interesting one I got from the coding train. I modified it by adding a slider to increase the number of circles it uses. When the number of circles gets big, t…

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## [How to make array ip address UDP message when receiving colour arrays from Processing on Arduino](https://discourse.processing.org/t/how-to-make-array-ip-address-udp-message-when-receiving-colour-arrays-from-processing-on-arduino/29843)

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**Author:** [@eunbiline98](https://discourse.processing.org/u/eunbiline98)\
**Replies:** 4\
**Last updated:** [May 11, 2021, 9:46pm UTC](https://discourse.processing.org/t/how-to-make-array-ip-address-udp-message-when-receiving-colour-arrays-from-processing-on-arduino/29843 "2021-05-11T21:46:15Z")

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I have successfully sent colour array to esp32,but i have a problem if run program processing sometimes like quitting program and notification “WARNING: no real random source present! Could not run the sketch (Target VM…

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## [Directional halo on 2D graphic](https://discourse.processing.org/t/directional-halo-on-2d-graphic/29832)

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**Author:** [@afkqs](https://discourse.processing.org/u/afkqs)\
**Replies:** 8\
**Last updated:** [May 11, 2021, 9:02pm UTC](https://discourse.processing.org/t/directional-halo-on-2d-graphic/29832 "2021-05-11T21:02:32Z")

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Hi there, This is a pretty open question but I wanted to ask the community for some insights. How would you proceed to create directional halo on a 2D graphic, whether a shape or an image? An example of the effect I’m…

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## [How to make flag?](https://discourse.processing.org/t/how-to-make-flag/30055)

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**Author:** [@savaxn](https://discourse.processing.org/u/savaxn)\
**Replies:** 1\
**Last updated:** [May 11, 2021, 7:46pm UTC](https://discourse.processing.org/t/how-to-make-flag/30055 "2021-05-11T19:46:03Z")

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please format code with \</\> button \* homework policy \* asking questions The flag should move once every few seconds to the right and then to the left

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## [When i run processing video library it tells me not installed properly](https://discourse.processing.org/t/when-i-run-processing-video-library-it-tells-me-not-installed-properly/30014)

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**Author:** [@zang](https://discourse.processing.org/u/zang)\
**Replies:** 3\
**Last updated:** [May 11, 2021, 3:30pm UTC](https://discourse.processing.org/t/when-i-run-processing-video-library-it-tells-me-not-installed-properly/30014 "2021-05-11T15:30:56Z")

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i download it from the contribution manager in processing. it still has error

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## [Coding Questions - Sound and Video](https://discourse.processing.org/t/coding-questions-sound-and-video/30041)

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**Author:** [@kaiitj](https://discourse.processing.org/u/kaiitj)\
**Replies:** 1\
**Last updated:** [May 11, 2021, 2:33pm UTC](https://discourse.processing.org/t/coding-questions-sound-and-video/30041 "2021-05-11T14:33:08Z")

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I’m still very new to coding but I’m currently working with a 3D model that is motorized and reacts to sound, and I’m trying to figure out the best way to translate that digitally. I’ve done a code that “reveals” an imag…

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## [Processing and Keith Peters' "Foundation Actionscript 3.0 Animation: Making Things Move!"](https://discourse.processing.org/t/processing-and-keith-peters-foundation-actionscript-3-0-animation-making-things-move/29787)

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**Author:** [@mario60](https://discourse.processing.org/u/mario60)\
**Replies:** 12\
**Last updated:** [May 8, 2021, 5:27pm UTC](https://discourse.processing.org/t/processing-and-keith-peters-foundation-actionscript-3-0-animation-making-things-move/29787 "2021-05-08T17:27:16Z")

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Hi I am reading the book by Keith Peters Foundation Actionscript 3.0 Animation: Making Things Move! (which is indirectly referenced at https://processing.org/examples/bouncy) It seems to me that all its codes could b…

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## [How to save login](https://discourse.processing.org/t/how-to-save-login/30033)

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**Author:** [@jessie\_lorentzen1](https://discourse.processing.org/u/jessie_lorentzen1)\
**Replies:** 1\
**Last updated:** [May 11, 2021, 8:10am UTC](https://discourse.processing.org/t/how-to-save-login/30033 "2021-05-11T08:10:57Z")

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Hi guys. I’m coding an app at the moment, but i’m having trouble makeing it save the sign up data in the program. Any tips or exampels to what i might do?

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## [Processing's eventual switch from Java as primary language, over to Python?](https://discourse.processing.org/t/processings-eventual-switch-from-java-as-primary-language-over-to-python/23688)

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**Author:** [@pablohotsauce](https://discourse.processing.org/u/pablohotsauce)\
**Replies:** 19\
**Last updated:** [May 11, 2021, 3:09am UTC](https://discourse.processing.org/t/processings-eventual-switch-from-java-as-primary-language-over-to-python/23688 "2021-05-11T03:09:00Z")

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I remember reading something recently by one of the Processing higher-ups, saying that eventually Processing would most likely leave Java behind and switch over to Python as its primary language. Presumably this would me…

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## [Questions about AI (theoretical)](https://discourse.processing.org/t/questions-about-ai-theoretical/28142)

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**Author:** [@CodeMasterX](https://discourse.processing.org/u/CodeMasterX)\
**Replies:** 13\
**Last updated:** [May 11, 2021, 1:46am UTC](https://discourse.processing.org/t/questions-about-ai-theoretical/28142 "2021-05-11T01:46:24Z")

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Just some questions about AI, which I don’t know where to ask. Will probably use it in the future. Is machine learning just a “framework” which you can put into a random situation and it would learn? what actual types …

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## [How to access photos if importing Processing into eclipse?](https://discourse.processing.org/t/how-to-access-photos-if-importing-processing-into-eclipse/29995)

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**Author:** [@Magic](https://discourse.processing.org/u/Magic)\
**Replies:** 3\
**Last updated:** [May 10, 2021, 11:59pm UTC](https://discourse.processing.org/t/how-to-access-photos-if-importing-processing-into-eclipse/29995 "2021-05-10T23:59:09Z")

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Hello, I am currently working on a photomosaic project. It’s the same one that The Coding Train did a video on. I just tried to port it into eclipse, and am adding some extra functions. How does one make it to where ecli…

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## [Random horizontal or vertical character movement](https://discourse.processing.org/t/random-horizontal-or-vertical-character-movement/30002)

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**Author:** [@oussama10](https://discourse.processing.org/u/oussama10)\
**Replies:** 5\
**Last updated:** [May 10, 2021, 11:17pm UTC](https://discourse.processing.org/t/random-horizontal-or-vertical-character-movement/30002 "2021-05-10T23:17:05Z")

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I am creating a bomberman game and I arrived to adding the enemies but I dont know how to do it. An enemy moves linearly, from top to bottom or from left to right, until it meets a barrier; he then reverses his directio…

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## [How to run 2 java sketches in a single window](https://discourse.processing.org/t/how-to-run-2-java-sketches-in-a-single-window/29908)

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**Author:** [@chaima](https://discourse.processing.org/u/chaima)\
**Replies:** 11\
**Last updated:** [May 10, 2021, 9:00am UTC](https://discourse.processing.org/t/how-to-run-2-java-sketches-in-a-single-window/29908 "2021-05-10T09:00:38Z")

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Hello, I need to run two independent sketches in a single window. Is there any way to divide the window into 2 frames and run each sketch in a frame?

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## [How do i make an object bounce off another](https://discourse.processing.org/t/how-do-i-make-an-object-bounce-off-another/29999)

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**Author:** [@cloofs](https://discourse.processing.org/u/cloofs)\
**Replies:** 1\
**Last updated:** [May 10, 2021, 4:19am UTC](https://discourse.processing.org/t/how-do-i-make-an-object-bounce-off-another/29999 "2021-05-10T04:19:43Z")

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I’m doing a code where i want a ball(pong) to bounce off a rectangle(bouncer). does anyone know the code for a bounce off?

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## [Bouncing line with for loops](https://discourse.processing.org/t/bouncing-line-with-for-loops/29972)

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**Author:** [@Bromo](https://discourse.processing.org/u/Bromo)\
**Replies:** 15\
**Last updated:** [May 10, 2021, 1:06am UTC](https://discourse.processing.org/t/bouncing-line-with-for-loops/29972 "2021-05-10T01:06:44Z")

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Hi, I’m currently trying to make a program that draws a line moving across the screen, if it reaches the edge ideally it’ll move in the opposite direction. When I run the program it seems to be stuck on the far left side…

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## [3.3.6 Manual set-up](https://discourse.processing.org/t/3-3-6-manual-set-up/29987)

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**Author:** [@delorean](https://discourse.processing.org/u/delorean)\
**Replies:** 2\
**Last updated:** [May 9, 2021, 10:36pm UTC](https://discourse.processing.org/t/3-3-6-manual-set-up/29987 "2021-05-09T22:36:32Z")

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Hello, Processing community, I hope you can help, I have an old version of Processing 3.3.6 which I am moving from one computer to another. I have a sketch which uses video and webcam, it opens but hangs, and I think i…

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