# Processing

**URL:** https://discourse.processing.org/c/processing/6.md?no_subcategories=false&page=166

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

**Page:** 167

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## [How to change String order and position and keep char order of each String?!](https://discourse.processing.org/t/how-to-change-string-order-and-position-and-keep-char-order-of-each-string/23656)

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**Author:** [@lolonulu](https://discourse.processing.org/u/lolonulu)\
**Replies:** 21\
**Last updated:** [November 30, 2020, 6:59pm UTC](https://discourse.processing.org/t/how-to-change-string-order-and-position-and-keep-char-order-of-each-string/23656 "2020-11-30T18:59:29Z")

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Hello, I got some amazing help from the great @jeremydouglass for my sketch, but I am stuck now. Jeremy wrote me this below, but I don’t find the solution to write properly the function he suggested to me. Blockquote …

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## [mousePressed stays true after any JOptionPane.showMessageDialog](https://discourse.processing.org/t/mousepressed-stays-true-after-any-joptionpane-showmessagedialog/25828)

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**Author:** [@RSV](https://discourse.processing.org/u/RSV)\
**Replies:** 1\
**Last updated:** [November 30, 2020, 12:56pm UTC](https://discourse.processing.org/t/mousepressed-stays-true-after-any-joptionpane-showmessagedialog/25828 "2020-11-30T12:56:08Z")

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Hello, I am encountering a problem with one of my programs where I use the JOptionPane.showMessageDialog. After the message dialog the mousePressed stays true causing unwanted actions. code below. Even running the JOp…

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## [Processing 4 resize()](https://discourse.processing.org/t/processing-4-resize/25812)

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**Author:** [@matheplica](https://discourse.processing.org/u/matheplica)\
**Replies:** 3\
**Last updated:** [November 30, 2020, 11:16am UTC](https://discourse.processing.org/t/processing-4-resize/25812 "2020-11-30T11:16:02Z")

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Hi, I’m trying to use resize() in Processing 4: masque.resize(img.width, img.height); But I’ve got this error : RuntimeException: resize() not implemented for this PImage type It’s work fine with 3.5.4, there is a way…

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## [How to spawn a rectangle when mouse is clicked (however many times you want) and make it do the same functions as my code can](https://discourse.processing.org/t/how-to-spawn-a-rectangle-when-mouse-is-clicked-however-many-times-you-want-and-make-it-do-the-same-functions-as-my-code-can/25820)

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**Author:** [@0w3n928](https://discourse.processing.org/u/0w3n928)\
**Replies:** 1\
**Last updated:** [November 30, 2020, 8:35am UTC](https://discourse.processing.org/t/how-to-spawn-a-rectangle-when-mouse-is-clicked-however-many-times-you-want-and-make-it-do-the-same-functions-as-my-code-can/25820 "2020-11-30T08:35:07Z")

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Code: float rectx,recty,xspeed=7,yspeed=7; void setup() { fullScreen(); } void draw() { background(0); rect(rectx,recty,300,150); fill(0,255,0); if(mousePressed==true); rect(recty,rectx,300,150); if(sideCollis…

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## [Processing Confirmation Window](https://discourse.processing.org/t/processing-confirmation-window/25816)

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**Author:** [@Idris](https://discourse.processing.org/u/Idris)\
**Replies:** 1\
**Last updated:** [November 30, 2020, 5:46am UTC](https://discourse.processing.org/t/processing-confirmation-window/25816 "2020-11-30T05:46:13Z")

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Hey guys!. Can you all please help me of how to make a confirmation window before exiting the sketch with the options ‘Yes’ and ‘No’ in Processing 3.0 Java? Here is my simple code: boolean correct\[\] = {false,false}; vo…

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## [How to move an Object at x and y simultaneously?](https://discourse.processing.org/t/how-to-move-an-object-at-x-and-y-simultaneously/25801)

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**Author:** [@corken](https://discourse.processing.org/u/corken)\
**Replies:** 4\
**Last updated:** [November 30, 2020, 1:02am UTC](https://discourse.processing.org/t/how-to-move-an-object-at-x-and-y-simultaneously/25801 "2020-11-30T01:02:03Z")

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Hello I dont quite understand how to move an object on the x and on the y at the same time. It would be nice if someone could give me an example. Also here is the code im working on right now. If you want to correct i…

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## [A timer which activates by pressing a button](https://discourse.processing.org/t/a-timer-which-activates-by-pressing-a-button/25818)

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**Author:** [@thedarklord](https://discourse.processing.org/u/thedarklord)\
**Replies:** 1\
**Last updated:** [November 29, 2020, 11:20pm UTC](https://discourse.processing.org/t/a-timer-which-activates-by-pressing-a-button/25818 "2020-11-29T23:20:42Z")

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I’m trying to make a timer which starts by pressing a button. I’ve tried millis() but it starts counting as soon as I start the program.

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## [How to animate an Image?](https://discourse.processing.org/t/how-to-animate-an-image/25819)

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**Author:** [@corken](https://discourse.processing.org/u/corken)\
**Replies:** 1\
**Last updated:** [November 29, 2020, 10:56pm UTC](https://discourse.processing.org/t/how-to-animate-an-image/25819 "2020-11-29T22:56:03Z")

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Hello, my question is how to animate an moving object. In my code I can move Mario and added the animation. But it is at 60 fps by default so its really fast. When I cap the FPS the animation obviously is slower but als…

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## [How to sort words alphabetically from a String?](https://discourse.processing.org/t/how-to-sort-words-alphabetically-from-a-string/12767)

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**Author:** [@lolonulu](https://discourse.processing.org/u/lolonulu)\
**Replies:** 119\
**Last updated:** [November 29, 2020, 10:26pm UTC](https://discourse.processing.org/t/how-to-sort-words-alphabetically-from-a-string/12767 "2020-11-29T22:26:10Z")

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Hello, The code below compiles, but the way the words are displayed is really strange (last word on the left and then the other words on its right…) how come ?!! I want to sort the words in alphabetical order and chang…

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## [Calling arraylist object function on entire arraylist](https://discourse.processing.org/t/calling-arraylist-object-function-on-entire-arraylist/25813)

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**Author:** [@ScriptKiddie](https://discourse.processing.org/u/ScriptKiddie)\
**Replies:** 1\
**Last updated:** [November 29, 2020, 5:14pm UTC](https://discourse.processing.org/t/calling-arraylist-object-function-on-entire-arraylist/25813 "2020-11-29T17:14:49Z")

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Hi everyone, pseudocode below: class Class { void function() { instruction performed by object; } } ArrayList\<Class\> objectList = new ArrayList(100); for(int i = 0; i \< 100; i++) { objectList.get(i)…

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## [String to base64 and vice versa](https://discourse.processing.org/t/string-to-base64-and-vice-versa/25690)

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**Author:** [@papaboo](https://discourse.processing.org/u/papaboo)\
**Replies:** 4\
**Last updated:** [November 29, 2020, 5:14pm UTC](https://discourse.processing.org/t/string-to-base64-and-vice-versa/25690 "2020-11-29T17:14:45Z")

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Hi, I’ve searched through the forum but seen base64 applied only for images. Is it possible convert a string to base64 and decrypt base64 to plain text? In Javascript I think it’s done with “atob” “btoa”, what about in…

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## [This ball goes through the rectangle rather than hitting it or bouncing it](https://discourse.processing.org/t/this-ball-goes-through-the-rectangle-rather-than-hitting-it-or-bouncing-it/25783)

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**Author:** [@Waka](https://discourse.processing.org/u/Waka)\
**Replies:** 66\
**Last updated:** [November 29, 2020, 5:05pm UTC](https://discourse.processing.org/t/this-ball-goes-through-the-rectangle-rather-than-hitting-it-or-bouncing-it/25783 "2020-11-29T17:05:50Z")

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Hi, Can you please help to make the ball hit the rectangle rather than go through the rectangle float ballx,bally,xspeed=5,yspeed=8; void setup() { size(displayWidth,displayHeight); stroke(255); strokeWeight(100); } v…

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## [Save when app close, exit() ... stop()](https://discourse.processing.org/t/save-when-app-close-exit-stop/25754)

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**Author:** [@matheplica](https://discourse.processing.org/u/matheplica)\
**Replies:** 7\
**Last updated:** [November 29, 2020, 12:25pm UTC](https://discourse.processing.org/t/save-when-app-close-exit-stop/25754 "2020-11-29T12:25:32Z")

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Hi, I’m trying to save data when my app close either with mouse or ESC button. I try with exit() and stop() with any result. this is my code void stop(){ saveSlides(); exit(); } Thanks

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## [Generative Patterns Processing Poster](https://discourse.processing.org/t/generative-patterns-processing-poster/25721)

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**Author:** [@angela1811](https://discourse.processing.org/u/angela1811)\
**Replies:** 14\
**Last updated:** [November 29, 2020, 11:43am UTC](https://discourse.processing.org/t/generative-patterns-processing-poster/25721 "2020-11-29T11:43:28Z")

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Hello everyone, I am a newbie in Processing! I have to submit a project very soon for the final exam at university T^T But it’s so sad I’m stuck with my project. I have to create a programming poster but I’m don’t have…

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## [How do I change the size of the display window?](https://discourse.processing.org/t/how-do-i-change-the-size-of-the-display-window/25384)

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**Author:** [@Math\_Machine](https://discourse.processing.org/u/Math_Machine)\
**Replies:** 27\
**Last updated:** [November 29, 2020, 12:57am UTC](https://discourse.processing.org/t/how-do-i-change-the-size-of-the-display-window/25384 "2020-11-29T00:57:34Z")

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So, I was tampering around with the “setResizable” feature in Processing. I was pretty satisfied with the results, when combined with the “scale” function and the “PMatrix” class, I can basically resize the entire sketc…

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## [Random() seems to be very biased towards positive numbers. how to mitigate?](https://discourse.processing.org/t/random-seems-to-be-very-biased-towards-positive-numbers-how-to-mitigate/25749)

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**Author:** [@exe](https://discourse.processing.org/u/exe)\
**Replies:** 10\
**Last updated:** [November 29, 2020, 12:19am UTC](https://discourse.processing.org/t/random-seems-to-be-very-biased-towards-positive-numbers-how-to-mitigate/25749 "2020-11-29T00:19:09Z")

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My level of expertise is pretty low, I have some mild background in Java and QBasic way back when, and otherwise have learned most of the little I know via Daniel’s YT tuts (of which I’ve still many to go through). But …

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## [How to extract values from a PVector?](https://discourse.processing.org/t/how-to-extract-values-from-a-pvector/25778)

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**Author:** [@laptophead](https://discourse.processing.org/u/laptophead)\
**Replies:** 4\
**Last updated:** [November 28, 2020, 7:17pm UTC](https://discourse.processing.org/t/how-to-extract-values-from-a-pvector/25778 "2020-11-28T19:17:31Z")

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please format code with \</\> button \* homework policy \* asking questions I am using the leapmotion library and some values are coming in a PVector. They print out fine, but when I put them in a string to be sent to A…

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## [How to make a rectangle spawn when mouseclicked and will bounce](https://discourse.processing.org/t/how-to-make-a-rectangle-spawn-when-mouseclicked-and-will-bounce/25742)

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**Author:** [@0w3n928](https://discourse.processing.org/u/0w3n928)\
**Replies:** 2\
**Last updated:** [November 28, 2020, 6:51pm UTC](https://discourse.processing.org/t/how-to-make-a-rectangle-spawn-when-mouseclicked-and-will-bounce/25742 "2020-11-28T18:51:13Z")

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I’m trying to make another rectangle spawn when mouse is clicked once and it will collide to my first bouncing rectangle and I can add however many i want but my code doesn’t even need me to click and it doesn’t really w…

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## [Random elements different positions](https://discourse.processing.org/t/random-elements-different-positions/16984)

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**Author:** [@San](https://discourse.processing.org/u/San)\
**Replies:** 4\
**Last updated:** [November 28, 2020, 6:33pm UTC](https://discourse.processing.org/t/random-elements-different-positions/16984 "2020-11-28T18:33:17Z")

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Hi I want to draw squares on random positions on a grid, but I don’t want to have them on the same position. If I run the code sometimes there are two squares on the same position. I know that it has something to do wit…

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## [Food Drop from an Airplane](https://discourse.processing.org/t/food-drop-from-an-airplane/25782)

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**Author:** [@Elo](https://discourse.processing.org/u/Elo)\
**Replies:** 1\
**Last updated:** [November 28, 2020, 5:36pm UTC](https://discourse.processing.org/t/food-drop-from-an-airplane/25782 "2020-11-28T17:36:43Z")

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I don’t know what I’m doing wrong and I don’t understand processing that well; Can Someone help me fix the issues and bugs in my program \[details=“Summary”\] This text will be hidden //plane coordinates int planeX…

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## [I am going to do a roll dice game](https://discourse.processing.org/t/i-am-going-to-do-a-roll-dice-game/25780)

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**Author:** [@mengtong](https://discourse.processing.org/u/mengtong)\
**Replies:** 2\
**Last updated:** [November 28, 2020, 12:26pm UTC](https://discourse.processing.org/t/i-am-going-to-do-a-roll-dice-game/25780 "2020-11-28T12:26:52Z")

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Here is my code, now I can roll my dice. But I want the only dice or dices I choose to re-roll, others ignore. I didt finish reroll function. I dont know how to do it. Can someone give me some suggest? final int NUM\_SID…

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## [Index out of bounds](https://discourse.processing.org/t/index-out-of-bounds/25775)

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**Author:** [@ScriptKiddie](https://discourse.processing.org/u/ScriptKiddie)\
**Replies:** 4\
**Last updated:** [November 28, 2020, 9:27am UTC](https://discourse.processing.org/t/index-out-of-bounds/25775 "2020-11-28T09:27:30Z")

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Hi everyone, I’m hoping I’m missing something simple here. I want to display an object (which works) and when my player entity collides with this object the object should disappear. My collision code works but once the …

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## [Transparency in save() function](https://discourse.processing.org/t/transparency-in-save-function/25699)

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**Author:** [@yanze03](https://discourse.processing.org/u/yanze03)\
**Replies:** 14\
**Last updated:** [November 28, 2020, 9:22am UTC](https://discourse.processing.org/t/transparency-in-save-function/25699 "2020-11-28T09:22:35Z")

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So I made this code where you can draw and create an image. This works just fine but is it possible to get an image with a transparant background? Is there like a function to remove everything with RGB code white in a ce…

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## [Decimal into binary numbers](https://discourse.processing.org/t/decimal-into-binary-numbers/25758)

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**Author:** [@Ellie98](https://discourse.processing.org/u/Ellie98)\
**Replies:** 2\
**Last updated:** [November 28, 2020, 6:40am UTC](https://discourse.processing.org/t/decimal-into-binary-numbers/25758 "2020-11-28T06:40:54Z")

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Hey, i’m trying to convert the decimal numerbs into binary numbers but I get a lot of zeros in front of the binary numbers. How do I cut of the zeros? Thanks in advance! void setup() { //System.out.printf("Dez -\> Du…

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## [Trying to understand why a boolean is returning true](https://discourse.processing.org/t/trying-to-understand-why-a-boolean-is-returning-true/25779)

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**Author:** [@crimpqwe](https://discourse.processing.org/u/crimpqwe)\
**Replies:** 1\
**Last updated:** [November 28, 2020, 4:49am UTC](https://discourse.processing.org/t/trying-to-understand-why-a-boolean-is-returning-true/25779 "2020-11-28T04:49:12Z")

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import controlP5.\*; boolean button1 = false, button2 = false, button3 = false; ControlP5 cp5; float bg = random(255); void setup() { size(1200, 750); cp5 = new ControlP5(this); cp5.addButton("A") .setPosi…

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## [Sending data from python to processing](https://discourse.processing.org/t/sending-data-from-python-to-processing/25771)

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**Author:** [@arcadeperfect](https://discourse.processing.org/u/arcadeperfect)\
**Replies:** 7\
**Last updated:** [November 27, 2020, 8:41pm UTC](https://discourse.processing.org/t/sending-data-from-python-to-processing/25771 "2020-11-27T20:41:35Z")

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Hi I’m trying to transmit sensor data from a python script to a processing sketch via sockets. On the python side I have: import socket import random HOST = '' # Symbolic name meaning all availabl…

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## [Expecting EOF, found else](https://discourse.processing.org/t/expecting-eof-found-else/25759)

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**Author:** [@muffininwinter](https://discourse.processing.org/u/muffininwinter)\
**Replies:** 2\
**Last updated:** [November 27, 2020, 8:01pm UTC](https://discourse.processing.org/t/expecting-eof-found-else/25759 "2020-11-27T20:01:41Z")

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please format code with \</\> button \* homework policy \* asking questions boolean running = false; PImage imgbk; PImage imgm; PImage albert; PImage imgnote; String\[\] imageNames = { "albert0.jpg", "albert1.jpg" }; PI…

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## [Making a RGB leds strips control gui](https://discourse.processing.org/t/making-a-rgb-leds-strips-control-gui/25762)

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**Author:** [@extazy](https://discourse.processing.org/u/extazy)\
**Replies:** 1\
**Last updated:** [November 27, 2020, 6:30pm UTC](https://discourse.processing.org/t/making-a-rgb-leds-strips-control-gui/25762 "2020-11-27T18:30:51Z")

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Hi , I am actually on a project wich consists of creating a gui to control multiple rgb led strips and normal leds . So what i need for this project is at least two colors pickers ( or colors wheels ) and some buttons …

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## [How to capture an area of pixels ? - Pro3 - Fr/En](https://discourse.processing.org/t/how-to-capture-an-area-of-pixels-pro3-fr-en/25747)

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**Author:** [@Eli0kYd](https://discourse.processing.org/u/Eli0kYd)\
**Replies:** 4\
**Last updated:** [November 27, 2020, 3:33pm UTC](https://discourse.processing.org/t/how-to-capture-an-area-of-pixels-pro3-fr-en/25747 "2020-11-27T15:33:16Z")

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Hello ! I’m still new to processing and code in general. I might ask a lot so I take everything you could give to me ! I’m here to ask you what title already announces : How to capture an area of pixel and to transpose…

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## [Unexpected token: void](https://discourse.processing.org/t/unexpected-token-void/25757)

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**Author:** [@muffininwinter](https://discourse.processing.org/u/muffininwinter)\
**Replies:** 3\
**Last updated:** [November 27, 2020, 2:48pm UTC](https://discourse.processing.org/t/unexpected-token-void/25757 "2020-11-27T14:48:02Z")

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boolean running = false; PImage imgbk; PImage imgm; PImage albert; PImage imgnote; PImage\[\] img = new PImage\[2\]; int totalNum = 4; int dx, dy; int score; int startTime; int albertX, albertY, albertW, albertH; …

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