# Processing

**URL:** https://discourse.processing.org/c/processing/6.md?page=346

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

**Page:** 347

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## [Can background of text editor be changed?](https://discourse.processing.org/t/can-background-of-text-editor-be-changed/5657)

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**Author:** [@wsnicol](https://discourse.processing.org/u/wsnicol)\
**Replies:** 1\
**Last updated:** [November 18, 2018, 4:09am UTC](https://discourse.processing.org/t/can-background-of-text-editor-be-changed/5657 "2018-11-18T04:09:50Z")

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Is it possible to change the white background in the text editor? To something easier on the eyes, if not actually a different color then maybe make the white not quite as glaring?:eyeglasses:

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## [Rotate function with 4 arguments](https://discourse.processing.org/t/rotate-function-with-4-arguments/5652)

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**Author:** [@moonspacedancer](https://discourse.processing.org/u/moonspacedancer)\
**Replies:** 2\
**Last updated:** [November 18, 2018, 1:54am UTC](https://discourse.processing.org/t/rotate-function-with-4-arguments/5652 "2018-11-18T01:54:07Z")

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In my studying today, I have come across a rotate function with 4 arguments more than once, except can’t find any documentation on it. anyone know anything about this?

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## [How to store last 20 mouse positions in an array?](https://discourse.processing.org/t/how-to-store-last-20-mouse-positions-in-an-array/5626)

<div class="topic-metadata">

**Author:** [@fmS3lect](https://discourse.processing.org/u/fmS3lect)\
**Replies:** 5\
**Last updated:** [November 17, 2018, 10:48pm UTC](https://discourse.processing.org/t/how-to-store-last-20-mouse-positions-in-an-array/5626 "2018-11-17T22:48:02Z")

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Hey all together, i am Sebastian, i am very new to programming and i think i need some help :smiley: i wrote this code snippet to store the last 20 mouse positions but it only stores the same 20times… i cannot figure …

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## [How to use Processing on 4k displays?](https://discourse.processing.org/t/how-to-use-processing-on-4k-displays/5550)

<div class="topic-metadata">

**Author:** [@codrutp](https://discourse.processing.org/u/codrutp)\
**Replies:** 10\
**Last updated:** [November 17, 2018, 10:08pm UTC](https://discourse.processing.org/t/how-to-use-processing-on-4k-displays/5550 "2018-11-17T22:08:07Z")

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I am using Processing in WSL/Ubuntu with X410 server. It works, but the text and the menus are tiny, tiny, I can barely read. How can I adjust the menu and the text?

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## [Using the "matrix" controler from the ControlP5 library](https://discourse.processing.org/t/using-the-matrix-controler-from-the-controlp5-library/5572)

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**Author:** [@solub](https://discourse.processing.org/u/solub)\
**Replies:** 2\
**Last updated:** [November 17, 2018, 3:38pm UTC](https://discourse.processing.org/t/using-the-matrix-controler-from-the-controlp5-library/5572 "2018-11-17T15:38:52Z")

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Hi, Does anyone know how to remove the “moving line” (don’t know how to call it) embeded in the matrix controller from the ControlP5 library ? By default the matrix is displayed as a (music) sequencer but I’d like to u…

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## [Processing will not start](https://discourse.processing.org/t/processing-will-not-start/5623)

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**Author:** [@dds](https://discourse.processing.org/u/dds)\
**Replies:** 0\
**Last updated:** [November 17, 2018, 12:54pm UTC](https://discourse.processing.org/t/processing-will-not-start/5623 "2018-11-17T12:54:32Z")

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Description When I double-click on processing.exe, the logo window of Processing shows up for a couple of seconds and then it disappears. My Environment Processing version: 3.4 Operating System and OS version: Windows …

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## [Rotate image implementation](https://discourse.processing.org/t/rotate-image-implementation/5615)

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**Author:** [@molo32](https://discourse.processing.org/u/molo32)\
**Replies:** 2\
**Last updated:** [November 17, 2018, 11:17am UTC](https://discourse.processing.org/t/rotate-image-implementation/5615 "2018-11-17T11:17:32Z")

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I’m implementing the matrix rotation from here My code works but the rotated image has holes, I guess it’s because of the rounding of the values of sin () and cos () How to fill the holes in the rotated image? …

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## [How to make a switch in a circuit?](https://discourse.processing.org/t/how-to-make-a-switch-in-a-circuit/5603)

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**Author:** [@saotome](https://discourse.processing.org/u/saotome)\
**Replies:** 5\
**Last updated:** [November 17, 2018, 11:07am UTC](https://discourse.processing.org/t/how-to-make-a-switch-in-a-circuit/5603 "2018-11-17T11:07:32Z")

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Hello. I have this "circuit! void setup() { size(600, 600); } void draw() { ellipse (300, 150, 40, 40); line (280, 150, 120, 150); line (120, 150, 120, 220); line (120, 220, 120, 290); //closed circuit line (1…

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## [Using FastNoise](https://discourse.processing.org/t/using-fastnoise/5587)

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**Author:** [@drc](https://discourse.processing.org/u/drc)\
**Replies:** 4\
**Last updated:** [November 17, 2018, 10:28am UTC](https://discourse.processing.org/t/using-fastnoise/5587 "2018-11-17T10:28:13Z")

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Hi, I’d like to use the FastNoise library. I drag&dropped the FastNoise.java to a new sketch, and with the following code: FastNoise myNoise; void setup() { myNoise.SetNoiseType(FastNoise.NoiseType.SimplexFractal); …

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## [Hosting A Processing.net server](https://discourse.processing.org/t/hosting-a-processing-net-server/5578)

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**Author:** [@Quillbert1](https://discourse.processing.org/u/Quillbert1)\
**Replies:** 4\
**Last updated:** [November 17, 2018, 9:38am UTC](https://discourse.processing.org/t/hosting-a-processing-net-server/5578 "2018-11-17T09:38:02Z")

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I have a program that uses processing.net to send and receive data. I was wondering if there is a website where i could host this server for free. For the sake of example, I will use Shiffman’s basic chat server. Server…

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## [G4P library - Is there a way to make big letters on numbers?](https://discourse.processing.org/t/g4p-library-is-there-a-way-to-make-big-letters-on-numbers/4350)

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**Author:** [@laptophead](https://discourse.processing.org/u/laptophead)\
**Replies:** 19\
**Last updated:** [November 16, 2018, 10:51pm UTC](https://discourse.processing.org/t/g4p-library-is-there-a-way-to-make-big-letters-on-numbers/4350 "2018-11-16T22:51:43Z")

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I am building a touch tablet interface for a robotic arm. It seems that the G4P library is the only one to respond to touch as a mouse click. That is nice, thank you author. However the buttons have very small writing …

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## [mousePressed always true](https://discourse.processing.org/t/mousepressed-always-true/5594)

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**Author:** [@FerrariLuigi](https://discourse.processing.org/u/FerrariLuigi)\
**Replies:** 2\
**Last updated:** [November 16, 2018, 9:37pm UTC](https://discourse.processing.org/t/mousepressed-always-true/5594 "2018-11-16T21:37:53Z")

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Dear all I developed a Processing sketch that handle mouse and its buttons. It works but, after a while, the mousePressed attribute becomes always true. Did you have any similar problem ? How did you fix it ? Thank …

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## [Problem with saving PImage with transparency](https://discourse.processing.org/t/problem-with-saving-pimage-with-transparency/5566)

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**Author:** [@Spu7Nix](https://discourse.processing.org/u/Spu7Nix)\
**Replies:** 4\
**Last updated:** [November 16, 2018, 6:09pm UTC](https://discourse.processing.org/t/problem-with-saving-pimage-with-transparency/5566 "2018-11-16T18:09:07Z")

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Hi, i have written this little program to cut a spritesheet for me, but it doesn’t work with transparency. Anybody know a fix? PImage sheet = loadImage("dirtTiles.png"); PImage\[\] tiles = new PImage\[25\]; int s = 16; bac…

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## [Send 3 variable to Arduino?](https://discourse.processing.org/t/send-3-variable-to-arduino/5467)

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**Author:** [@bking](https://discourse.processing.org/u/bking)\
**Replies:** 12\
**Last updated:** [November 16, 2018, 12:00pm UTC](https://discourse.processing.org/t/send-3-variable-to-arduino/5467 "2018-11-16T12:00:48Z")

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Hi, I’m trying to send 3 variable w1, w2 and phiV which are 3 parameter changing with the mouse tracking. I was trying to place those variable in 3 arrays and add it in a string but it didn’t work. I think there is on…

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## [About BezierSQL and MySQL 8.0](https://discourse.processing.org/t/about-beziersql-and-mysql-8-0/5534)

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**Author:** [@fabwoj](https://discourse.processing.org/u/fabwoj)\
**Replies:** 2\
**Last updated:** [November 16, 2018, 9:38am UTC](https://discourse.processing.org/t/about-beziersql-and-mysql-8-0/5534 "2018-11-16T09:38:03Z")

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Hi, It seems for me that the library BezierSQL doesn’t work anymore with MySQL 8.0. Did someone noticed that ? Something wrong around authentification. Thank you for your help. Fabrice

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## [Aim Game coding help](https://discourse.processing.org/t/aim-game-coding-help/5562)

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**Author:** [@SpeedKillerX](https://discourse.processing.org/u/SpeedKillerX)\
**Replies:** 1\
**Last updated:** [November 15, 2018, 7:15pm UTC](https://discourse.processing.org/t/aim-game-coding-help/5562 "2018-11-15T19:15:47Z")

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I need help with my code in processing, which is an easy code but since I am new to coding I will be needing some help with My code is sort of like an aim game where different boxes pop up and you will have to click (Sh…

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## [Can Mouse Coordinates Change with Translate and Rotate?](https://discourse.processing.org/t/can-mouse-coordinates-change-with-translate-and-rotate/5580)

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**Author:** [@Erit1566](https://discourse.processing.org/u/Erit1566)\
**Replies:** 1\
**Last updated:** [November 16, 2018, 6:14am UTC](https://discourse.processing.org/t/can-mouse-coordinates-change-with-translate-and-rotate/5580 "2018-11-16T06:14:56Z")

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Hi, I am trying to be able to change where the mouse cursor is so it would be easier to see if I am hovering over one of my objects without looking at every pixel by pixel. Thanks in advance, Eric

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## [Tracer Library - Cannot Composite Smooth Path](https://discourse.processing.org/t/tracer-library-cannot-composite-smooth-path/5515)

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**Author:** [@ychen53](https://discourse.processing.org/u/ychen53)\
**Replies:** 2\
**Last updated:** [November 16, 2018, 5:46am UTC](https://discourse.processing.org/t/tracer-library-cannot-composite-smooth-path/5515 "2018-11-16T05:46:32Z")

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Hi there, I am working on an art project and trying to create a path made of Bezier curves and then mapping text on it. The path is like this: bezier1a = new CubicBezier (1400, 179, 1150, 50 , 810, 140, 700, 190); …

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## [Use Processing on the Jetson TX1](https://discourse.processing.org/t/use-processing-on-the-jetson-tx1/5577)

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**Author:** [@Joe](https://discourse.processing.org/u/Joe)\
**Replies:** 0\
**Last updated:** [November 16, 2018, 2:05am UTC](https://discourse.processing.org/t/use-processing-on-the-jetson-tx1/5577 "2018-11-16T02:05:55Z")

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Hello, I am new here and I am working on a project at the moment. Is it possible for me to use a Jetson TX1 development board with processing software? The overall goal for me is to use Kinect V2 with a Jetson TX1 on Ub…

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## [Serial Processing](https://discourse.processing.org/t/serial-processing/5573)

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**Author:** [@vtrivedi](https://discourse.processing.org/u/vtrivedi)\
**Replies:** 0\
**Last updated:** [November 15, 2018, 9:22pm UTC](https://discourse.processing.org/t/serial-processing/5573 "2018-11-15T21:22:36Z")

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Hi Team, I am trying to read the data from the Serial port that is sent by the micro-pulser attached to the USART pin on the PC com port. The sequence of data to be received is based on the command sent to the micro pu…

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## [Amazing spiral! Help?](https://discourse.processing.org/t/amazing-spiral-help/5570)

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**Author:** [@Msandoval](https://discourse.processing.org/u/Msandoval)\
**Replies:** 1\
**Last updated:** [November 16, 2018, 1:01am UTC](https://discourse.processing.org/t/amazing-spiral-help/5570 "2018-11-16T01:01:48Z")

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float m = 0; void setup(){ fullScreen(P3D); } void draw(){ background(250); rotateX(frameCount \* 0.01); translate(400,500); for(float m = 0; m \< 5; m++){ pushMatrix(); for(float i = 0; i \< 80; i++){ translate(…

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## [Changing video speed smoothly](https://discourse.processing.org/t/changing-video-speed-smoothly/5568)

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**Author:** [@trpnnr](https://discourse.processing.org/u/trpnnr)\
**Replies:** 4\
**Last updated:** [November 15, 2018, 9:57pm UTC](https://discourse.processing.org/t/changing-video-speed-smoothly/5568 "2018-11-15T21:57:53Z")

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Hello, I am wondering if it may be possible to change the speed of a video file dynamically without the result having a choppy appearance - ie to speed up to or slow down smoothly to a specified rate.

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## [Random Numbers Generator](https://discourse.processing.org/t/random-numbers-generator/5563)

<div class="topic-metadata">

**Author:** [@SpeedKillerX](https://discourse.processing.org/u/SpeedKillerX)\
**Replies:** 3\
**Last updated:** [November 15, 2018, 8:31pm UTC](https://discourse.processing.org/t/random-numbers-generator/5563 "2018-11-15T20:31:02Z")

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I am making a random number generator using the code: void setup(){ size(600,600); textSize(40); } void draw(){ background(0); text(random(20),100,200); frameRate(1); } But I want the numbers to stop when I cli…

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## [Hello, I am trying to make the balls go up continuously when holding a key 1,2,3](https://discourse.processing.org/t/hello-i-am-trying-to-make-the-balls-go-up-continuously-when-holding-a-key-1-2-3/5557)

<div class="topic-metadata">

**Author:** [@alexism2022](https://discourse.processing.org/u/alexism2022)\
**Replies:** 1\
**Last updated:** [November 15, 2018, 6:56pm UTC](https://discourse.processing.org/t/hello-i-am-trying-to-make-the-balls-go-up-continuously-when-holding-a-key-1-2-3/5557 "2018-11-15T18:56:32Z")

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Hello, this is my code. I am currently trying to do what is said in this picture. I basically have 3 holes and want to make balls pop out of hole 1 when pressing 1, etc… So when you hold 1 on the keyboard, balls will…

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## [Getting current unix time](https://discourse.processing.org/t/getting-current-unix-time/5545)

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**Author:** [@JustACoder](https://discourse.processing.org/u/JustACoder)\
**Replies:** 2\
**Last updated:** [November 15, 2018, 9:50am UTC](https://discourse.processing.org/t/getting-current-unix-time/5545 "2018-11-15T09:50:23Z")

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Okay I know that you can use millis() to get the time since your program started but how can I get the exact unix time?

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## [How to access actual vertex coordinates for transformed PShape in a Group](https://discourse.processing.org/t/how-to-access-actual-vertex-coordinates-for-transformed-pshape-in-a-group/5520)

<div class="topic-metadata">

**Author:** [@ddownn](https://discourse.processing.org/u/ddownn)\
**Replies:** 4\
**Last updated:** [November 15, 2018, 9:11am UTC](https://discourse.processing.org/t/how-to-access-actual-vertex-coordinates-for-transformed-pshape-in-a-group/5520 "2018-11-15T09:11:30Z")

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I’ve got this PShape Group composed of four sided polygons which have been arranged in a circle and I’m trying to access their coordinates so I can check if the mouse is over each one individually. The problem is that ea…

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## [I'm getting a NullPointerException](https://discourse.processing.org/t/im-getting-a-nullpointerexception/5529)

<div class="topic-metadata">

**Author:** [@Str1XHyper](https://discourse.processing.org/u/Str1XHyper)\
**Replies:** 3\
**Last updated:** [November 15, 2018, 8:59am UTC](https://discourse.processing.org/t/im-getting-a-nullpointerexception/5529 "2018-11-15T08:59:41Z")

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Can someone help me fix this problem. when I run this code I get a NullPointerException at rockets\[i\].update(), and even if I comment that out I get the same error but on rockets\[i\].display() and I don’t know why I have …

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## [How to animate a multiple connected shape](https://discourse.processing.org/t/how-to-animate-a-multiple-connected-shape/5532)

<div class="topic-metadata">

**Author:** [@Ingo](https://discourse.processing.org/u/Ingo)\
**Replies:** 2\
**Last updated:** [November 15, 2018, 8:41am UTC](https://discourse.processing.org/t/how-to-animate-a-multiple-connected-shape/5532 "2018-11-15T08:41:09Z")

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Hi everyone, I have some questions, because I cannot figure out how to start my projects best. First of all, I would like to program a selfbalancing (binary) tree. Daniel Shiffman tried it too, but the solution was not…

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## [Question about mouse2DTransformations library](https://discourse.processing.org/t/question-about-mouse2dtransformations-library/5363)

<div class="topic-metadata">

**Author:** [@ddownn](https://discourse.processing.org/u/ddownn)\
**Replies:** 5\
**Last updated:** [November 15, 2018, 2:14am UTC](https://discourse.processing.org/t/question-about-mouse2dtransformations-library/5363 "2018-11-15T02:14:33Z")

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I was hoping to use this library, but I must be doing something wrong. Can someone let me know what I am not doing right? The idea is that clicking on the slider bar changes its color, but it only works when clicking on…

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## [lerpColor triggered by event](https://discourse.processing.org/t/lerpcolor-triggered-by-event/5541)

<div class="topic-metadata">

**Author:** [@eduzal](https://discourse.processing.org/u/eduzal)\
**Replies:** 3\
**Last updated:** [November 14, 2018, 10:49pm UTC](https://discourse.processing.org/t/lerpcolor-triggered-by-event/5541 "2018-11-14T22:49:59Z")

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hello i’m having some trouble to smoothly change a color from a triggered event, initially mousePressed, then i will move to a timer. I’m loading a .svg file, adding each child in a separate custom object stored in an …

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