# Latest

**URL:** https://discourse.processing.org/latest.md?page=560

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

**Page:** 561

---

## [Airfoil has holes in it](https://discourse.processing.org/t/airfoil-has-holes-in-it/5420)

<div class="topic-metadata">

**Author:** [@HackinHarry](https://discourse.processing.org/u/HackinHarry)\
**Replies:** 10\
**Last updated:** [November 12, 2018, 9:39pm UTC](https://discourse.processing.org/t/airfoil-has-holes-in-it/5420 "2018-11-12T21:39:34Z")

</div>

I’m playing around with PixelFlow and the Wind Tunnel LIC example. I went to UUIC airfoil database and grabbed the coordinates for the Eppler 193 airfoil which is a good one for model airplanes. I wrote a little sketch…

---

## [Beginner app developer](https://discourse.processing.org/t/beginner-app-developer/5483)

<div class="topic-metadata">

**Author:** [@beginner](https://discourse.processing.org/u/beginner)\
**Replies:** 1\
**Last updated:** [November 12, 2018, 8:43pm UTC](https://discourse.processing.org/t/beginner-app-developer/5483 "2018-11-12T20:43:57Z")

</div>

I am a complete beginner in the android application development. I wanted to create an interactive application for little children with pictures and sounds. What is the best way to begin? Should i use processing for andr…

---

## [Inverting graphics and code](https://discourse.processing.org/t/inverting-graphics-and-code/5116)

<div class="topic-metadata">

**Author:** [@IdoPlumes](https://discourse.processing.org/u/IdoPlumes)\
**Replies:** 8\
**Last updated:** [November 12, 2018, 7:31pm UTC](https://discourse.processing.org/t/inverting-graphics-and-code/5116 "2018-11-12T19:31:47Z")

</div>

Hello, I am new to processing, but not so much coding as i have done a 2 years of audio process design and implementation at my current university, using c and c++ languages. However i am getting into the graphics worl…

---

## [Reversing the draw()/code?](https://discourse.processing.org/t/reversing-the-draw-code/5172)

<div class="topic-metadata">

**Author:** [@ReDeagle](https://discourse.processing.org/u/ReDeagle)\
**Replies:** 3\
**Last updated:** [November 12, 2018, 7:22pm UTC](https://discourse.processing.org/t/reversing-the-draw-code/5172 "2018-11-12T19:22:02Z")

</div>

Hey everyone, I have a project for school where parts of an object come flying in from different parts of a screen into the center to form a car. We aren’t allowed to use if statements either. I know how to code it so t…

---

## [Loading Video from URL?](https://discourse.processing.org/t/loading-video-from-url/5480)

<div class="topic-metadata">

**Author:** [@Arnoldovna](https://discourse.processing.org/u/Arnoldovna)\
**Replies:** 3\
**Last updated:** [November 12, 2018, 7:15pm UTC](https://discourse.processing.org/t/loading-video-from-url/5480 "2018-11-12T19:15:32Z")

</div>

hello. Im trying to create a Video with createVideo() from a youtube URL. In order to draw it on a canvas later on. Is this possible? I saw something like this “URL.createObjectURL”. Is this pointing in the right direc…

---

## [Drawing the path of Mover under the influence of Attractor](https://discourse.processing.org/t/drawing-the-path-of-mover-under-the-influence-of-attractor/5463)

<div class="topic-metadata">

**Author:** [@ahariri72](https://discourse.processing.org/u/ahariri72)\
**Replies:** 3\
**Last updated:** [November 12, 2018, 4:56pm UTC](https://discourse.processing.org/t/drawing-the-path-of-mover-under-the-influence-of-attractor/5463 "2018-11-12T16:56:40Z")

</div>

Hi all, I am trying to track the movement of a mover class that is moving based on the gravity of a couple of attractors. I need to show the trajectory of this movement using lines/points. Currently the ellipse movement…

---

## [My First Sketch: Watch live bitcoin transactions](https://discourse.processing.org/t/my-first-sketch-watch-live-bitcoin-transactions/5316)

<div class="topic-metadata">

**Author:** [@inersha](https://discourse.processing.org/u/inersha)\
**Replies:** 4\
**Last updated:** [November 12, 2018, 4:53pm UTC](https://discourse.processing.org/t/my-first-sketch-watch-live-bitcoin-transactions/5316 "2018-11-12T16:53:48Z")

</div>

Hello everyone, This is my first p5.js sketch. It shows all the latest bitcoin transactions as raindrops: bitcoinrain\[dot\]io If you click on it you can see the current size of the memory pool (where new bitcoin transa…

---

## [GameControlPlus Joystick polling issue](https://discourse.processing.org/t/gamecontrolplus-joystick-polling-issue/5386)

<div class="topic-metadata">

**Author:** [@metype](https://discourse.processing.org/u/metype)\
**Replies:** 2\
**Last updated:** [November 12, 2018, 4:44pm UTC](https://discourse.processing.org/t/gamecontrolplus-joystick-polling-issue/5386 "2018-11-12T16:44:00Z")

</div>

So this isn’t an issue for most, but I’m trying to add support for both a joystick and a keyboard, I want a way to test if there is a joystick without showing the box if there isn’t one that matches the config file.

---

## [Descargar referencia de processig](https://discourse.processing.org/t/descargar-referencia-de-processig/5454)

<div class="topic-metadata">

**Author:** [@hokuto](https://discourse.processing.org/u/hokuto)\
**Replies:** 4\
**Last updated:** [November 12, 2018, 1:33pm UTC](https://discourse.processing.org/t/descargar-referencia-de-processig/5454 "2018-11-12T13:33:27Z")

</div>

Hola. Hay alguna manera de descargar la referencia de processing. Tambien me gustaria saber si se puede poner en español la referencia de processig.

---

## [Width (0) and height (0) cannot be \<= 0](https://discourse.processing.org/t/width-0-and-height-0-cannot-be-0/5459)

<div class="topic-metadata">

**Author:** [@ProcessingSuzanne](https://discourse.processing.org/u/ProcessingSuzanne)\
**Replies:** 9\
**Last updated:** [November 12, 2018, 11:48am UTC](https://discourse.processing.org/t/width-0-and-height-0-cannot-be-0/5459 "2018-11-12T11:48:34Z")

</div>

I am working on a very simple BackgroundSubtraction code on processing. In the beginning everything was woking fine but now I get the “Width (0) and height (0) cannot be \<= 0” error every time I try to play the code. Her…

---

## [.net installation error?](https://discourse.processing.org/t/net-installation-error/2160)

<div class="topic-metadata">

**Author:** [@david4121](https://discourse.processing.org/u/david4121)\
**Replies:** 2\
**Last updated:** [November 12, 2018, 8:59am UTC](https://discourse.processing.org/t/net-installation-error/2160 "2018-11-12T08:59:40Z")

</div>

Can anybody help me to update .Net framework?

---

## [TouchOSC not controling slider on PC](https://discourse.processing.org/t/touchosc-not-controling-slider-on-pc/5158)

<div class="topic-metadata">

**Author:** [@Lourens](https://discourse.processing.org/u/Lourens)\
**Replies:** 2\
**Last updated:** [November 12, 2018, 8:24am UTC](https://discourse.processing.org/t/touchosc-not-controling-slider-on-pc/5158 "2018-11-12T08:24:19Z")

</div>

Hi this is my first post. I followed the following tutorial on Youtube on how to control sliders with TouchOSC from my iPhone to my PC. Getting the phone set up was easy, but the sliders on the phone does not control t…

---

## [Get degree direction from point to point](https://discourse.processing.org/t/get-degree-direction-from-point-to-point/5464)

<div class="topic-metadata">

**Author:** [@Darkar25](https://discourse.processing.org/u/Darkar25)\
**Replies:** 1\
**Last updated:** [November 12, 2018, 7:30am UTC](https://discourse.processing.org/t/get-degree-direction-from-point-to-point/5464 "2018-11-12T07:30:48Z")

</div>

How can i get the degree direction from x1 y1 to x2 y2?example… x1 = 0 y1 = 0 x2 = 100 y2 = 100 Its equals 45°… I tried to make it myself but it not 100% accurate method…its showing 10-15 more degrees than needed…

---

## [All sketches heavily stuttering every 5-10 seconds](https://discourse.processing.org/t/all-sketches-heavily-stuttering-every-5-10-seconds/5384)

<div class="topic-metadata">

**Author:** [@lokus](https://discourse.processing.org/u/lokus)\
**Replies:** 6\
**Last updated:** [November 11, 2018, 11:08pm UTC](https://discourse.processing.org/t/all-sketches-heavily-stuttering-every-5-10-seconds/5384 "2018-11-11T23:08:40Z")

</div>

I have no idea what’s causing this, it doesn’t have anything to do with the code. Even the demo sketches are affected in exactly the same way. I’ve tried a clean java install and increasing available memory to 1024MB in …

---

## [Problem with slitscan effect for pre-recorded video](https://discourse.processing.org/t/problem-with-slitscan-effect-for-pre-recorded-video/5456)

<div class="topic-metadata">

**Author:** [@KarlKlimpe](https://discourse.processing.org/u/KarlKlimpe)\
**Replies:** 4\
**Last updated:** [November 11, 2018, 11:04pm UTC](https://discourse.processing.org/t/problem-with-slitscan-effect-for-pre-recorded-video/5456 "2018-11-11T23:04:08Z")

</div>

Hello everyone I am trying do slitscan effects, but instead of sourcing the feed from a webcam i want to apply the effect on pre-recorded video. I run into some problems with the copy command. I can load the sketch, b…

---

## [Why is the pixels array "unidimensional" and not bidimensional?](https://discourse.processing.org/t/why-is-the-pixels-array-unidimensional-and-not-bidimensional/5445)

<div class="topic-metadata">

**Author:** [@Dino6](https://discourse.processing.org/u/Dino6)\
**Replies:** 7\
**Last updated:** [November 11, 2018, 7:03pm UTC](https://discourse.processing.org/t/why-is-the-pixels-array-unidimensional-and-not-bidimensional/5445 "2018-11-11T19:03:24Z")

</div>

I’m just curious, I’m trying to build my own kind of pixels array out of processing/p5 and I’m wondering if it should be a normal array or a bidimensional array. I can easily pull the xy coords from the unidimensional a…

---

## [Problem while creating a brick breaker game](https://discourse.processing.org/t/problem-while-creating-a-brick-breaker-game/5416)

<div class="topic-metadata">

**Author:** [@fritzpal](https://discourse.processing.org/u/fritzpal)\
**Replies:** 2\
**Last updated:** [November 11, 2018, 6:25pm UTC](https://discourse.processing.org/t/problem-while-creating-a-brick-breaker-game/5416 "2018-11-11T18:25:21Z")

</div>

Hi, Can somebody help me display the bricks correctly. I can´t get it to work. I think the problem is the array and how I determine the position of the bricks. Thank you! Here\`s the main Program: SpielerFlaeche play…

---

## [Problems adding Papaya Library](https://discourse.processing.org/t/problems-adding-papaya-library/5372)

<div class="topic-metadata">

**Author:** [@Mick](https://discourse.processing.org/u/Mick)\
**Replies:** 2\
**Last updated:** [November 11, 2018, 6:21pm UTC](https://discourse.processing.org/t/problems-adding-papaya-library/5372 "2018-11-11T18:21:41Z")

</div>

Hi fellow programmers, I want to use statistics in my code and therefore I’m trying to add the Papaya library to Processing. I added the library to the library folder of processing, but for some reason it doesn’t work. …

---

## [Where is that Topic?](https://discourse.processing.org/t/where-is-that-topic/5341)

<div class="topic-metadata">

**Author:** [@kll](https://discourse.processing.org/u/kll)\
**Replies:** 3\
**Last updated:** [November 11, 2018, 6:19pm UTC](https://discourse.processing.org/t/where-is-that-topic/5341 "2018-11-11T18:19:47Z")

</div>

i might be old and confused, but this morning i read and answered to a topic https://discourse.processing.org/t/how-to-sort-student-arrays/5334/ but now it is gone: Oops! That page doesn’t exist or is private. can …

---

## [Unicode Decode Error](https://discourse.processing.org/t/unicode-decode-error/5367)

<div class="topic-metadata">

**Author:** [@prof.leleu](https://discourse.processing.org/u/prof.leleu)\
**Replies:** 2\
**Last updated:** [November 11, 2018, 5:44pm UTC](https://discourse.processing.org/t/unicode-decode-error/5367 "2018-11-11T17:44:21Z")

</div>

Hi. On my personal computers, processing works like a charm. I use it in python mode. On my school’s computers everytime i load a script or even if i save a script, when I try to run it I get this : processing.app.Ske…

---

## [How can i get and set a cookie from a web browser with client.write and client.read?](https://discourse.processing.org/t/how-can-i-get-and-set-a-cookie-from-a-web-browser-with-client-write-and-client-read/5443)

<div class="topic-metadata">

**Author:** [@Quix](https://discourse.processing.org/u/Quix)\
**Replies:** 1\
**Last updated:** [November 11, 2018, 5:24pm UTC](https://discourse.processing.org/t/how-can-i-get-and-set-a-cookie-from-a-web-browser-with-client-write-and-client-read/5443 "2018-11-11T17:24:06Z")

</div>

Hi i want to know if i can get a cookie from client.write and client.readstring? here is my code import processing.net.\*; import processing.video.\*; import java.io.File; Server myServer; int nb = 0; byte\[\] logo; void…

---

## [Loading data / Constructor problem](https://discourse.processing.org/t/loading-data-constructor-problem/5179)

<div class="topic-metadata">

**Author:** [@RC75018](https://discourse.processing.org/u/RC75018)\
**Replies:** 3\
**Last updated:** [November 11, 2018, 5:09pm UTC](https://discourse.processing.org/t/loading-data-constructor-problem/5179 "2018-11-11T17:09:32Z")

</div>

Hi Everyone, I am learning processing with Daniel @shiffman Book (learning processing + Youtube video) and got stuck at exercise 18-7 (Data input from text files). I can’t find the solution online, that is why i am ask…

---

## [Graphica DateTimeStamp](https://discourse.processing.org/t/graphica-datetimestamp/5450)

<div class="topic-metadata">

**Author:** [@pacolux](https://discourse.processing.org/u/pacolux)\
**Replies:** 1\
**Last updated:** [November 11, 2018, 3:58pm UTC](https://discourse.processing.org/t/graphica-datetimestamp/5450 "2018-11-11T15:58:20Z")

</div>

Does anyone know if the Graphica library can have a datetimestamp as one of its axis? I see years being used in an example but cannot seem to find datetime used. Tia!

---

## [Draw a curve that touches 3 points](https://discourse.processing.org/t/draw-a-curve-that-touches-3-points/5104)

<div class="topic-metadata">

**Author:** [@molo32](https://discourse.processing.org/u/molo32)\
**Replies:** 10\
**Last updated:** [November 11, 2018, 3:36pm UTC](https://discourse.processing.org/t/draw-a-curve-that-touches-3-points/5104 "2018-11-11T15:36:57Z")

</div>

Draw a curve that touches 3 points (1 starting point, 2 medium, 3 final) coordinates: 1 (10,10) 2 (100,200) (200,10) I must implement the curve function () without using libraries and manipulating pixels with pixel \[\] …

---

## [Why is the function Fill not found? but the rest of the functions on the library yes?](https://discourse.processing.org/t/why-is-the-function-fill-not-found-but-the-rest-of-the-functions-on-the-library-yes/5447)

<div class="topic-metadata">

**Author:** [@gio](https://discourse.processing.org/u/gio)\
**Replies:** 1\
**Last updated:** [November 11, 2018, 2:57pm UTC](https://discourse.processing.org/t/why-is-the-function-fill-not-found-but-the-rest-of-the-functions-on-the-library-yes/5447 "2018-11-11T14:57:50Z")

</div>

Im workingon a P5.js sketch… Instead of creating objects with a constructor function, and then using the new keyword. I want to use a factory function. It seems to work fine, and renders correclty when using for examp…

---

## [Toxiclibs + GPU (openGL) processing 3](https://discourse.processing.org/t/toxiclibs-gpu-opengl-processing-3/5378)

<div class="topic-metadata">

**Author:** [@bryan](https://discourse.processing.org/u/bryan)\
**Replies:** 14\
**Last updated:** [November 11, 2018, 2:32pm UTC](https://discourse.processing.org/t/toxiclibs-gpu-opengl-processing-3/5378 "2018-11-11T14:32:07Z")

</div>

Hi! Does anyone know how to create surfaces with toxiclibs using low level OpenGL functions? i’ve seen documentation but only for processing 2 or below, but can’t figure out how to make it work. with big surfaces the fr…

---

## [My first two P3 Games(Java)](https://discourse.processing.org/t/my-first-two-p3-games-java/2920)

<div class="topic-metadata">

**Author:** [@Skys](https://discourse.processing.org/u/Skys)\
**Replies:** 5\
**Last updated:** [November 11, 2018, 2:04pm UTC](https://discourse.processing.org/t/my-first-two-p3-games-java/2920 "2018-11-11T14:04:08Z")

</div>

I read about Processing at “Heise.de MAKE”. now i love this strange kind of java processing. after my first experience with processing i tried to find some “more Professionell” compiler. but i do not find a language …

---

## [controlP5TextField+Keypressed event](https://discourse.processing.org/t/controlp5textfield-keypressed-event/5442)

<div class="topic-metadata">

**Author:** [@Gui](https://discourse.processing.org/u/Gui)\
**Replies:** 0\
**Last updated:** [November 11, 2018, 12:30pm UTC](https://discourse.processing.org/t/controlp5textfield-keypressed-event/5442 "2018-11-11T12:30:03Z")

</div>

Hey, so I’ve been having some problems with this: I want to have a box where I can write and the text appears while I write, so I used the TextField. The thing is, at the same time, when I press a key it’s supposed to ma…

---

## [Need help on a short animation](https://discourse.processing.org/t/need-help-on-a-short-animation/5438)

<div class="topic-metadata">

**Author:** [@Robin73](https://discourse.processing.org/u/Robin73)\
**Replies:** 2\
**Last updated:** [November 11, 2018, 12:24pm UTC](https://discourse.processing.org/t/need-help-on-a-short-animation/5438 "2018-11-11T12:24:44Z")

</div>

so i had in mind to make spawn 3000 pac man at the same time in random (x;y) and i want them to go on the right. But when i try only one spawn in random(x;y) and he is nice going on the right but i can’t make spawn 3000 …

---

## [Error in every ControlWindow function](https://discourse.processing.org/t/error-in-every-controlwindow-function/5398)

<div class="topic-metadata">

**Author:** [@sukh](https://discourse.processing.org/u/sukh)\
**Replies:** 3\
**Last updated:** [November 11, 2018, 11:20am UTC](https://discourse.processing.org/t/error-in-every-controlwindow-function/5398 "2018-11-11T11:20:32Z")

</div>

While running this line of code: controlWindow.hideCoordinates(); controlWindow.setTitle("Decoding Parameters"); It says: The function “hideCoordinates()” does not exist The function “setTitle(String)” does not exist

[Previous page](https://discourse.processing.org/latest.md?page=559)

[Next page](https://discourse.processing.org/latest.md?page=561)