# Latest

**URL:** https://discourse.processing.org/latest.md?page=459

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

**Page:** 460

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## [Line thickness in P3D](https://discourse.processing.org/t/line-thickness-in-p3d/12995)

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**Author:** [@rapatski](https://discourse.processing.org/u/rapatski)\
**Replies:** 8\
**Last updated:** [August 3, 2019, 11:54pm UTC](https://discourse.processing.org/t/line-thickness-in-p3d/12995 "2019-08-03T23:54:26Z")

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Hello everyone! Been a little while, and I enjoy exploring what Processing 3 has brought us. Have a rather simple question though transitioning from the old OpenGL way of thinking to the new P3D rendering – one being li…

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## [Live counting small size particles in a video](https://discourse.processing.org/t/live-counting-small-size-particles-in-a-video/12953)

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**Author:** [@Sruthi\_Krish](https://discourse.processing.org/u/Sruthi_Krish)\
**Replies:** 3\
**Last updated:** [August 3, 2019, 3:50pm UTC](https://discourse.processing.org/t/live-counting-small-size-particles-in-a-video/12953 "2019-08-03T15:50:10Z")

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Hello Everyone ! I am trying to get the live count of particles in a particular video frame , which is of really small size upto 1mm. Kindly help me out with the blobscanner library and suggest me some methods to count…

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## [Auto adjusting list](https://discourse.processing.org/t/auto-adjusting-list/13091)

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**Author:** [@TrustyFox](https://discourse.processing.org/u/TrustyFox)\
**Replies:** 21\
**Last updated:** [August 3, 2019, 3:45pm UTC](https://discourse.processing.org/t/auto-adjusting-list/13091 "2019-08-03T15:45:57Z")

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I’m trying to make a game kill feed in processing. It would have rectangles with text coming in from the top, every new rectangle would push down all the rectangles under it to make space. How should I go about making …

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## ['is equal to': == vs ===](https://discourse.processing.org/t/is-equal-to-vs/13150)

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**Author:** [@SheCurvesMobius](https://discourse.processing.org/u/SheCurvesMobius)\
**Replies:** 2\
**Last updated:** [August 3, 2019, 11:34am UTC](https://discourse.processing.org/t/is-equal-to-vs/13150 "2019-08-03T11:34:34Z")

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Hi all, I come from Processing where ‘is equal to’ is represented by ‘==’. Lauren McCarthy’s book “Getting Started with Processing” uses this standard as well. However I’ve noted that here: https://p5js.org/examples/co…

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## [Start image in center then follow mouse?](https://discourse.processing.org/t/start-image-in-center-then-follow-mouse/12834)

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**Author:** [@epignosis567](https://discourse.processing.org/u/epignosis567)\
**Replies:** 15\
**Last updated:** [August 3, 2019, 11:21am UTC](https://discourse.processing.org/t/start-image-in-center-then-follow-mouse/12834 "2019-08-03T11:21:21Z")

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Hi. How could I edit this code so that when a person loads the page the image is in the center but then once they click/touch the image follows the mouse cursor/finger? Currently the image follows the cursor but that mea…

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## [How to light a vertex](https://discourse.processing.org/t/how-to-light-a-vertex/13148)

<div class="topic-metadata">

**Author:** [@lofi](https://discourse.processing.org/u/lofi)\
**Replies:** 2\
**Last updated:** [August 3, 2019, 9:54am UTC](https://discourse.processing.org/t/how-to-light-a-vertex/13148 "2019-08-03T09:54:53Z")

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I’m trying to make little “hills” and was hoping to light them up. I’m using sets of vertexes but cant get light to act on them. I can make light work on a sphere or a box, but not my shapes made with vertexes. I feel l…

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## [Wrapping preload(), setup() and draw() in an ES6 class](https://discourse.processing.org/t/wrapping-preload-setup-and-draw-in-an-es6-class/13071)

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**Author:** [@kenny83](https://discourse.processing.org/u/kenny83)\
**Replies:** 7\
**Last updated:** [August 3, 2019, 12:42am UTC](https://discourse.processing.org/t/wrapping-preload-setup-and-draw-in-an-es6-class/13071 "2019-08-03T00:42:18Z")

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Hi all, Apologies if this has been discussed before; I did a quick search across Google and this forum but didn’t find much. Please point me in the right direction if this is a duplicate question :slight\_smile: So what…

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## [Simple code for alternate stroke, does not work](https://discourse.processing.org/t/simple-code-for-alternate-stroke-does-not-work/13054)

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**Author:** [@Francisco](https://discourse.processing.org/u/Francisco)\
**Replies:** 9\
**Last updated:** [August 2, 2019, 10:36pm UTC](https://discourse.processing.org/t/simple-code-for-alternate-stroke-does-not-work/13054 "2019-08-02T22:36:15Z")

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Processing does not detect errors, but alternates the first time and then stays that way all the time. void setup(){ size(500,400); fill(50,230,50); } void draw(){ background(200); stroke(0); rect(150,100,200…

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## [Lets make a video game! - Project 16x16](https://discourse.processing.org/t/lets-make-a-video-game-project-16x16/6292)

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**Author:** [@Stephcraft](https://discourse.processing.org/u/Stephcraft)\
**Replies:** 4\
**Last updated:** [August 2, 2019, 4:45pm UTC](https://discourse.processing.org/t/lets-make-a-video-game-project-16x16/6292 "2019-08-02T16:45:49Z")

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Very small description Open source - Pixel art - 2D Platformer - video game - made using Processing ! Objective Project 16x16 is game that everyone can develop, the goal is to have a finished game with a story and cool …

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## [Disable Cache for sketch.js](https://discourse.processing.org/t/disable-cache-for-sketch-js/13138)

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**Author:** [@mikeA](https://discourse.processing.org/u/mikeA)\
**Replies:** 4\
**Last updated:** [August 2, 2019, 1:00pm UTC](https://discourse.processing.org/t/disable-cache-for-sketch-js/13138 "2019-08-02T13:00:52Z")

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Doing some development work, I am making incremental changes to the sketch.js file which is in the folder TEST on the web site testing.com - together with the other required files such as index.html, assets etc. The pro…

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## [Consulta evento de teclado](https://discourse.processing.org/t/consulta-evento-de-teclado/13118)

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**Author:** [@carmigh](https://discourse.processing.org/u/carmigh)\
**Replies:** 2\
**Last updated:** [August 2, 2019, 1:15pm UTC](https://discourse.processing.org/t/consulta-evento-de-teclado/13118 "2019-08-02T13:15:28Z")

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Hola!! Estoy haciendo un pequeño juego y resulta que al programar eventos de teclado (con keyPressed y key) tarda muchísimo en ejecutarse la orden, tanto que al principio pensaba que ya no funcionaba… ¿alguien tiene solu…

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## [Need name suggestion for press like event](https://discourse.processing.org/t/need-name-suggestion-for-press-like-event/13116)

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**Author:** [@clankill3r](https://discourse.processing.org/u/clankill3r)\
**Replies:** 4\
**Last updated:** [August 2, 2019, 11:08am UTC](https://discourse.processing.org/t/need-name-suggestion-for-press-like-event/13116 "2019-08-02T11:08:45Z")

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When having a button or toggle or check or whatever, the normal press behaviour is that if you press an element, that element keeps the focus and when moving the mouse no other press will start. To demonstrate it visual…

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## [Processing 3 is not working properly](https://discourse.processing.org/t/processing-3-is-not-working-properly/13001)

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**Author:** [@iaeliyen](https://discourse.processing.org/u/iaeliyen)\
**Replies:** 7\
**Last updated:** [August 2, 2019, 10:35am UTC](https://discourse.processing.org/t/processing-3-is-not-working-properly/13001 "2019-08-02T10:35:16Z")

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Recently, I uninstalled few programs(Including Java stuffs) and app on my laptop and after few days I opened processing 3.3.6, it just show this for a minute and then goes off and after a while(10 - 20 minutes) sketch…

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## [Image Processing program running just fine- added in variables and freezes](https://discourse.processing.org/t/image-processing-program-running-just-fine-added-in-variables-and-freezes/13132)

<div class="topic-metadata">

**Author:** [@eric](https://discourse.processing.org/u/eric)\
**Replies:** 3\
**Last updated:** [August 2, 2019, 9:52am UTC](https://discourse.processing.org/t/image-processing-program-running-just-fine-added-in-variables-and-freezes/13132 "2019-08-02T09:52:17Z")

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I was tidying up my first ever program (that worked), wanting to make it adjust to different circumstances like any good code is able to do, I recognized numbers that were being used more than once in the same context an…

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## [Processing face detection?](https://discourse.processing.org/t/processing-face-detection/10544)

<div class="topic-metadata">

**Author:** [@nothingnew](https://discourse.processing.org/u/nothingnew)\
**Replies:** 3\
**Last updated:** [August 2, 2019, 2:20am UTC](https://discourse.processing.org/t/processing-face-detection/10544 "2019-08-02T02:20:36Z")

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Hello! I am working on my school project and thinking of using face (mouth) detection in processing. I have searched few days, but I am not sure if processing can do mouth open and close detection. Is there any way to …

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## [Simple OpenNI Error opening database/parameters](https://discourse.processing.org/t/simple-openni-error-opening-database-parameters/12637)

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**Author:** [@QueenBee](https://discourse.processing.org/u/QueenBee)\
**Replies:** 3\
**Last updated:** [August 2, 2019, 12:31am UTC](https://discourse.processing.org/t/simple-openni-error-opening-database-parameters/12637 "2019-08-02T00:31:48Z")

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Hi! I’ve just come back to a project I was working on a month or two ago, and while it was working fine back then (and I haven’t messed with the folders it exists in), any sketch that involves Simple OpenNI comes up wit…

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## [Map lat lng to a portion of the world map](https://discourse.processing.org/t/map-lat-lng-to-a-portion-of-the-world-map/13124)

<div class="topic-metadata">

**Author:** [@l-arc-en-ciel](https://discourse.processing.org/u/l-arc-en-ciel)\
**Replies:** 2\
**Last updated:** [August 2, 2019, 12:29am UTC](https://discourse.processing.org/t/map-lat-lng-to-a-portion-of-the-world-map/13124 "2019-08-02T00:29:09Z")

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Hello, I want to project GPS coordinates on a screen of a specific size. This screen must not be representing the entire world map, but a small portion, something like 200 meters x 100 meters at a certain place . This …

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## [Filling a vertex shape](https://discourse.processing.org/t/filling-a-vertex-shape/13099)

<div class="topic-metadata">

**Author:** [@paulgoux](https://discourse.processing.org/u/paulgoux)\
**Replies:** 12\
**Last updated:** [August 1, 2019, 8:59pm UTC](https://discourse.processing.org/t/filling-a-vertex-shape/13099 "2019-08-01T20:59:50Z")

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Hi im attempting to create complex shapes using a ray casting and the vertex function to fill the space that the light touches as opposed to simply drawing the lines. At the moment the code works fine but requires me to …

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## [Machine Vision - Detecting circles (OpenCV)](https://discourse.processing.org/t/machine-vision-detecting-circles-opencv/3776)

<div class="topic-metadata">

**Author:** [@Palmhoej](https://discourse.processing.org/u/Palmhoej)\
**Replies:** 12\
**Last updated:** [August 1, 2019, 7:08pm UTC](https://discourse.processing.org/t/machine-vision-detecting-circles-opencv/3776 "2019-08-01T19:08:28Z")

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So i am trying to detect some test tubes with a webcam, so i can pick them up using a robot. I have successfully detected the straight lines and from there i can get the position and orientation of the line. For this tas…

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## [Reveal bg image with circle following mouse](https://discourse.processing.org/t/reveal-bg-image-with-circle-following-mouse/13102)

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**Author:** [@harkusch](https://discourse.processing.org/u/harkusch)\
**Replies:** 5\
**Last updated:** [August 1, 2019, 2:26pm UTC](https://discourse.processing.org/t/reveal-bg-image-with-circle-following-mouse/13102 "2019-08-01T14:26:57Z")

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i have two layers, both are flat pictures. i want to uncover the lower picture with the mouse pointer. an circle has to follow the mouse. \>\>\>\> that’s what I´ve got right now. PVector theBallPosition; PVector theBallVelo…

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## [Calling a String Array to name a new integer array](https://discourse.processing.org/t/calling-a-string-array-to-name-a-new-integer-array/13080)

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**Author:** [@mpn702](https://discourse.processing.org/u/mpn702)\
**Replies:** 4\
**Last updated:** [August 1, 2019, 2:25pm UTC](https://discourse.processing.org/t/calling-a-string-array-to-name-a-new-integer-array/13080 "2019-08-01T14:25:31Z")

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I’m trying to write a loop that will generate a collection of new integer arrays based on the elements in a string ArrayList, but unfortunately Processing is having trouble calling the ArrayList in the definition of each…

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## [Good reference for video in p5?](https://discourse.processing.org/t/good-reference-for-video-in-p5/13121)

<div class="topic-metadata">

**Author:** [@SheCurvesMobius](https://discourse.processing.org/u/SheCurvesMobius)\
**Replies:** 2\
**Last updated:** [August 1, 2019, 2:20pm UTC](https://discourse.processing.org/t/good-reference-for-video-in-p5/13121 "2019-08-01T14:20:58Z")

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Hi all, I’ve noticed that there is no reference for video on p5’s main reference page here: http://p5js.org/reference/ And yet if I google it, I find one reference here: https://p5js.org/reference/#/p5/createVideo I…

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## [JRubyArt-2.1.0+ a ruby implementation of processing](https://discourse.processing.org/t/jrubyart-2-1-0-a-ruby-implementation-of-processing/12343)

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**Author:** [@monkstone](https://discourse.processing.org/u/monkstone)\
**Replies:** 0\
**Last updated:** [June 27, 2019, 2:18pm UTC](https://discourse.processing.org/t/jrubyart-2-1-0-a-ruby-implementation-of-processing/12343 "2019-06-27T14:18:06Z")

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I have just released a pre-release version of JRubyArt-2.1.0. Developed and tested and on 64bit linux, requires testing on MacOS and Windows, does not require an installed version of vanilla processing. To install as a g…

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## [oscP5 not loading within 5 seconds](https://discourse.processing.org/t/oscp5-not-loading-within-5-seconds/12765)

<div class="topic-metadata">

**Author:** [@cwbiggs](https://discourse.processing.org/u/cwbiggs)\
**Replies:** 3\
**Last updated:** [July 19, 2019, 7:53pm UTC](https://discourse.processing.org/t/oscp5-not-loading-within-5-seconds/12765 "2019-07-19T19:53:08Z")

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The oscP5 loading process is taking longer than 5 seconds and therefore the sketch will not run. There is nothing else significant in setup() that would be causing the delay. It works on three computers, but not the comp…

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## [How to print double quotes](https://discourse.processing.org/t/how-to-print-double-quotes/13106)

<div class="topic-metadata">

**Author:** [@GuilhermeVolker](https://discourse.processing.org/u/GuilhermeVolker)\
**Replies:** 3\
**Last updated:** [August 1, 2019, 11:02am UTC](https://discourse.processing.org/t/how-to-print-double-quotes/13106 "2019-08-01T11:02:01Z")

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Hi! I have to print an html stuff which contains double quotes, how to do that in processing?? (I have searched in processing reference but there doesn’t say anything about that) I have to print this text: \<?xml vers…

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## [P5js website fullScreen on iPad](https://discourse.processing.org/t/p5js-website-fullscreen-on-ipad/13094)

<div class="topic-metadata">

**Author:** [@AndreasRef](https://discourse.processing.org/u/AndreasRef)\
**Replies:** 2\
**Last updated:** [August 1, 2019, 10:31am UTC](https://discourse.processing.org/t/p5js-website-fullscreen-on-ipad/13094 "2019-08-01T10:31:52Z")

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Hi I am gonna set up an installation at a library that runs a p5js website on an iPad. I would like to run the website in full screen so users cannot access the adresse bar. When running the fullScreen example from th…

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## [Image Processing for measuring](https://discourse.processing.org/t/image-processing-for-measuring/13058)

<div class="topic-metadata">

**Author:** [@eric](https://discourse.processing.org/u/eric)\
**Replies:** 6\
**Last updated:** [August 1, 2019, 10:26am UTC](https://discourse.processing.org/t/image-processing-for-measuring/13058 "2019-08-01T10:26:24Z")

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Hello, very new to the coding world, started last week learning, and have been searching around for a simple solution to my problem but can’t find anything specific. Here is my situation: My end goal is to have an app …

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## [How to use processing to send video to kinect](https://discourse.processing.org/t/how-to-use-processing-to-send-video-to-kinect/13084)

<div class="topic-metadata">

**Author:** [@sharon0](https://discourse.processing.org/u/sharon0)\
**Replies:** 2\
**Last updated:** [August 1, 2019, 6:31am UTC](https://discourse.processing.org/t/how-to-use-processing-to-send-video-to-kinect/13084 "2019-08-01T06:31:39Z")

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Hello, I’m a beginner in processing. I am trying to send an image or video to Kinect by using processing. So I could interact with a screen, when I walk close to the screen, the Kinect sensor notices me, and then the ima…

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## [Blob tracking and collision detection](https://discourse.processing.org/t/blob-tracking-and-collision-detection/12806)

<div class="topic-metadata">

**Author:** [@QueenBee](https://discourse.processing.org/u/QueenBee)\
**Replies:** 17\
**Last updated:** [August 1, 2019, 6:21am UTC](https://discourse.processing.org/t/blob-tracking-and-collision-detection/12806 "2019-08-01T06:21:50Z")

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Hey! I’m having trouble with a collision detection program at the moment. Essentially I’m using blob tracking with colours (from a depth camera image), and I want to know when a blob collides or overlaps another blob, …

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## [To have a proper way of tagging a topic as solved](https://discourse.processing.org/t/to-have-a-proper-way-of-tagging-a-topic-as-solved/1602)

<div class="topic-metadata">

**Author:** [@DogeMastr](https://discourse.processing.org/u/DogeMastr)\
**Replies:** 2\
**Last updated:** [August 1, 2019, 4:23am UTC](https://discourse.processing.org/t/to-have-a-proper-way-of-tagging-a-topic-as-solved/1602 "2019-08-01T04:23:29Z")

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sorta along the lines of closing an Issue on github and I already see a Solved tab on my profile page so its probably a built in discourse thing if there already is a way then im just blind :upside\_down\_face:

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