# Processing

**URL:** https://discourse.processing.org/c/processing/6.md?page=153

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

**Page:** 154

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## [Is it possible to move image pixels in Processing?](https://discourse.processing.org/t/is-it-possible-to-move-image-pixels-in-processing/27361)

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**Author:** [@probeginner](https://discourse.processing.org/u/probeginner)\
**Replies:** 2\
**Last updated:** [January 28, 2021, 5:09am UTC](https://discourse.processing.org/t/is-it-possible-to-move-image-pixels-in-processing/27361 "2021-01-28T05:09:27Z")

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Hello, I am new to Processing! I just started self-studying Processing to visualize my idea. My final goal is to create a video that shows an image reacts to the sound. In the video, the image pixels that are located o…

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## [How to detect global keystrokes?](https://discourse.processing.org/t/how-to-detect-global-keystrokes/27413)

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**Author:** [@dacoconutchemist](https://discourse.processing.org/u/dacoconutchemist)\
**Replies:** 2\
**Last updated:** [January 27, 2021, 8:34pm UTC](https://discourse.processing.org/t/how-to-detect-global-keystrokes/27413 "2021-01-27T20:34:18Z")

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Is there a way to detect keystrokes when the sketch window is not active? I would like to read each keyPressed event even if another application has focus and the sketch is in background.

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## [Creating 3D objects](https://discourse.processing.org/t/creating-3d-objects/27411)

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**Author:** [@proc8888](https://discourse.processing.org/u/proc8888)\
**Replies:** 1\
**Last updated:** [January 27, 2021, 4:53pm UTC](https://discourse.processing.org/t/creating-3d-objects/27411 "2021-01-27T16:53:08Z")

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I am currently coding some 3D shapes using P3D mode (with and without the use of void draw()). The aim is to create 3D file in format OBJ, which can be then used eg. for fabrication such as 3D printing. I have several …

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## [Game of life not working](https://discourse.processing.org/t/game-of-life-not-working/27012)

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**Author:** [@FrigittyFrog](https://discourse.processing.org/u/FrigittyFrog)\
**Replies:** 6\
**Last updated:** [January 27, 2021, 4:03pm UTC](https://discourse.processing.org/t/game-of-life-not-working/27012 "2021-01-27T16:03:25Z")

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Can anyone tell me why my code is not working? There isn’t a syntax error, but everytime I run the code, the screen immeadiatelly turns white. I’m trying to create the game of life \[https://en.wikipedia.org/wiki/Conway’s…

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## [Urgent Code help (Draw Program)](https://discourse.processing.org/t/urgent-code-help-draw-program/27280)

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**Author:** [@Prxt.3k](https://discourse.processing.org/u/Prxt.3k)\
**Replies:** 31\
**Last updated:** [January 27, 2021, 6:11am UTC](https://discourse.processing.org/t/urgent-code-help-draw-program/27280 "2021-01-27T06:11:36Z")

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I need to change the location of the buttons from the side to at the top and beside each other. Also, I have the class for the fill button and Spray Paint. I need help determining which code I need so I can make it that…

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## [How to create new map shapes for default PShapes Sphere box etc](https://discourse.processing.org/t/how-to-create-new-map-shapes-for-default-pshapes-sphere-box-etc/27386)

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**Author:** [@kp443](https://discourse.processing.org/u/kp443)\
**Replies:** 1\
**Last updated:** [January 27, 2021, 2:11pm UTC](https://discourse.processing.org/t/how-to-create-new-map-shapes-for-default-pshapes-sphere-box-etc/27386 "2021-01-27T14:11:18Z")

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Tryna create planar mapping xy for a sphere. How to change the default mapping? Some tutorial link?

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## [Issues with Delaunay triangulation (Bowyer-Watson)](https://discourse.processing.org/t/issues-with-delaunay-triangulation-bowyer-watson/27255)

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**Author:** [@Althos](https://discourse.processing.org/u/Althos)\
**Replies:** 3\
**Last updated:** [January 27, 2021, 1:56pm UTC](https://discourse.processing.org/t/issues-with-delaunay-triangulation-bowyer-watson/27255 "2021-01-27T13:56:17Z")

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Hi, as the name says, I’m currently trying to code a simple Delaunay triangulation, using the Bowyer-Watson algorithm, I found great tutorials to help me along the way and my code is nearly working fine, except for one i…

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## [Object &Pixel Collision detection](https://discourse.processing.org/t/object-pixel-collision-detection/27384)

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**Author:** [@cicekselen](https://discourse.processing.org/u/cicekselen)\
**Replies:** 2\
**Last updated:** [January 27, 2021, 1:43pm UTC](https://discourse.processing.org/t/object-pixel-collision-detection/27384 "2021-01-27T13:43:01Z")

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Hey, I am a real newbie in coding in processing and I need help for my hw. I am trying to develop an agent-based simulation in which, the agents move in a closed space with obstacles. For the obstacles I am trying to use…

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## [Size() ignored and window goes full screen](https://discourse.processing.org/t/size-ignored-and-window-goes-full-screen/13932)

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**Author:** [@thunderball](https://discourse.processing.org/u/thunderball)\
**Replies:** 9\
**Last updated:** [January 27, 2021, 9:07am UTC](https://discourse.processing.org/t/size-ignored-and-window-goes-full-screen/13932 "2021-01-27T09:07:10Z")

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Hi, I just installed P3 on my desktop, which has two monitors, when running a sketch, my own or an example, the sketch is displayed larger than full screen, I can’t even view the content. Processing 2 works fine. Why i…

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## [Exported application copyright](https://discourse.processing.org/t/exported-application-copyright/27391)

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**Author:** [@what42](https://discourse.processing.org/u/what42)\
**Replies:** 0\
**Last updated:** [January 26, 2021, 7:57pm UTC](https://discourse.processing.org/t/exported-application-copyright/27391 "2021-01-26T19:57:41Z")

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I was looking through some files in an exported application I made and I found a copyright file in application.windows16/java. It says I’m not allowed to distribute it, but the whole reason I’m making it is so I can give…

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## [How to split image into several ones (spirtes)](https://discourse.processing.org/t/how-to-split-image-into-several-ones-spirtes/27365)

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**Author:** [@CodeMasterX](https://discourse.processing.org/u/CodeMasterX)\
**Replies:** 1\
**Last updated:** [January 25, 2021, 6:03pm UTC](https://discourse.processing.org/t/how-to-split-image-into-several-ones-spirtes/27365 "2021-01-25T18:03:12Z")

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Hi! I am trying to make the basics for chess and I am interested how to turn an image into an array of sprites. CodePImage source = loadImage("chessPieces2.png"); println(source.width, source.height); size(12…

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## [Stroke Decrease isnt working](https://discourse.processing.org/t/stroke-decrease-isnt-working/27349)

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**Author:** [@Prxt.3k](https://discourse.processing.org/u/Prxt.3k)\
**Replies:** 6\
**Last updated:** [January 25, 2021, 4:51pm UTC](https://discourse.processing.org/t/stroke-decrease-isnt-working/27349 "2021-01-25T16:51:38Z")

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//Minim Library import ddf.minim.\*; import ddf.minim.analysis.\*; import ddf.minim.effects.\*; import ddf.minim.signals.\*; import ddf.minim.spi.\*; import ddf.minim.ugens.\*; //Global Variables \<--------------------------…

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## [How to parse this string?](https://discourse.processing.org/t/how-to-parse-this-string/27362)

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**Author:** [@SNICKRS](https://discourse.processing.org/u/SNICKRS)\
**Replies:** 3\
**Last updated:** [January 25, 2021, 2:53pm UTC](https://discourse.processing.org/t/how-to-parse-this-string/27362 "2021-01-25T14:53:36Z")

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I have this string: "0000A000" How would I be able to group the zeros to get a string like this: 4A3

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## [How would you import an external library into processing?](https://discourse.processing.org/t/how-would-you-import-an-external-library-into-processing/27337)

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**Author:** [@SNICKRS](https://discourse.processing.org/u/SNICKRS)\
**Replies:** 1\
**Last updated:** [January 25, 2021, 2:29pm UTC](https://discourse.processing.org/t/how-would-you-import-an-external-library-into-processing/27337 "2021-01-25T14:29:52Z")

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I have this game in which I want to use an AI engine for the opponent, but it requires I use an external file as making an AI for this game is VERY complicated. However, I found a great java library that has everything I…

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## [Effect not applying on a image in array](https://discourse.processing.org/t/effect-not-applying-on-a-image-in-array/27200)

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**Author:** [@anarts\_3](https://discourse.processing.org/u/anarts_3)\
**Replies:** 2\
**Last updated:** [January 25, 2021, 9:56am UTC](https://discourse.processing.org/t/effect-not-applying-on-a-image-in-array/27200 "2021-01-25T09:56:33Z")

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Hello everyone! I have this code that has a dot effect on the images and has code to change said image into the next one when the mouse is pressed. int numFrames = 18; // The number of frames in the animation int frame…

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## [How to fix the positions of lines (Math related)](https://discourse.processing.org/t/how-to-fix-the-positions-of-lines-math-related/27344)

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**Author:** [@CodeMasterX](https://discourse.processing.org/u/CodeMasterX)\
**Replies:** 1\
**Last updated:** [January 24, 2021, 9:45pm UTC](https://discourse.processing.org/t/how-to-fix-the-positions-of-lines-math-related/27344 "2021-01-24T21:45:35Z")

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(I am trying to do this with a n-sided shape) but it is not working. The program works by having a position of the corner and giving a dir and r. How do I get the correct position? The current program only works for…

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## [How to check if there is an image with the same file name?](https://discourse.processing.org/t/how-to-check-if-there-is-an-image-with-the-same-file-name/27336)

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**Author:** [@Lukerfull](https://discourse.processing.org/u/Lukerfull)\
**Replies:** 6\
**Last updated:** [January 24, 2021, 8:44pm UTC](https://discourse.processing.org/t/how-to-check-if-there-is-an-image-with-the-same-file-name/27336 "2021-01-24T20:44:12Z")

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I want to save images without overwriting them. This is my code: if (controlDown) { if (keyCode == 83) { PImage partialSave = get(0,0,1098,650); nimg++; partialSave.save("drawings/draw"+nimg+".…

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## [Open close windows](https://discourse.processing.org/t/open-close-windows/27312)

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**Author:** [@jafal](https://discourse.processing.org/u/jafal)\
**Replies:** 3\
**Last updated:** [January 24, 2021, 6:51pm UTC](https://discourse.processing.org/t/open-close-windows/27312 "2021-01-24T18:51:44Z")

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hi is there away to call one window from other window ? void setup() { String\[\] args = {"TwoFrameTest"}; SecondApplet sa = new SecondApplet(); PApplet.runSketch(args, sa); } void settings() { size(300, 100);…

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## [For structure not generating shapes](https://discourse.processing.org/t/for-structure-not-generating-shapes/27153)

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**Author:** [@Townhaus](https://discourse.processing.org/u/Townhaus)\
**Replies:** 3\
**Last updated:** [January 24, 2021, 9:32am UTC](https://discourse.processing.org/t/for-structure-not-generating-shapes/27153 "2021-01-24T09:32:28Z")

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/\* the first for structure generates rectangles but I’m not sure why the second for structure doesn’t generate rectangles \*/ size (500, 600); background (115, 10, 125); int x = 0; noStroke (); for (int i = 250; i \<=…

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## [Bonjour je suis debutant au.processing](https://discourse.processing.org/t/bonjour-je-suis-debutant-au-processing/27315)

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**Author:** [@Douhane](https://discourse.processing.org/u/Douhane)\
**Replies:** 3\
**Last updated:** [January 23, 2021, 9:41pm UTC](https://discourse.processing.org/t/bonjour-je-suis-debutant-au-processing/27315 "2021-01-23T21:41:53Z")

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bonjour je suis nouveau et debutant a processing alors g reussi a allumer 3 led de mon arduino… via processing c mon premier programe la je veux utilisé le bleutooth de mon pc sur processing pour les allumer via bleu…

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## [Find the second occurrence of an object in an array](https://discourse.processing.org/t/find-the-second-occurrence-of-an-object-in-an-array/27309)

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**Author:** [@SNICKRS](https://discourse.processing.org/u/SNICKRS)\
**Replies:** 2\
**Last updated:** [January 23, 2021, 8:05pm UTC](https://discourse.processing.org/t/find-the-second-occurrence-of-an-object-in-an-array/27309 "2021-01-23T20:05:43Z")

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Hello, I am doing a coding project but it requires me to get the second occurrence of an object in an array. int\[\]\[\] array = {1, 2, 3, 4}, {5, 6, 7, 8}, {1, 2, 3, 4}; How would you get the second occurrence of “1” in …

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## [Brushstroke for Drawing Program](https://discourse.processing.org/t/brushstroke-for-drawing-program/27300)

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**Author:** [@Prxt.3k](https://discourse.processing.org/u/Prxt.3k)\
**Replies:** 3\
**Last updated:** [January 23, 2021, 6:39pm UTC](https://discourse.processing.org/t/brushstroke-for-drawing-program/27300 "2021-01-23T18:39:04Z")

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Anyone know whats the code for a Crayon and Paintbrush-like stroke? Thanks,

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## [GPanel object position using G4P](https://discourse.processing.org/t/gpanel-object-position-using-g4p/27311)

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**Author:** [@R2processing](https://discourse.processing.org/u/R2processing)\
**Replies:** 2\
**Last updated:** [January 23, 2021, 5:49pm UTC](https://discourse.processing.org/t/gpanel-object-position-using-g4p/27311 "2021-01-23T17:49:36Z")

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Hello, I’m using the useful G4P library. using lblTest.setText(“XXX”); I’m able to change the text of a GLAbel object. I’d like to change the location of a GLabel object inside a Panel with G4P. I didn’t succeed on t…

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## [15 coins game - pls help im stuck](https://discourse.processing.org/t/15-coins-game-pls-help-im-stuck/27268)

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**Author:** [@Grave](https://discourse.processing.org/u/Grave)\
**Replies:** 2\
**Last updated:** [January 23, 2021, 6:56am UTC](https://discourse.processing.org/t/15-coins-game-pls-help-im-stuck/27268 "2021-01-23T06:56:47Z")

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How can I make the class Candy disappear when Eyeball touch it? String gameState; PImage sc; // SCARLET FOREST void setup() { size(810, 810); eyeballSetup(); for(int i=0;i\<candies.length;i++){ candies\[i\] = new Can…

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## [Undo and Redo Button](https://discourse.processing.org/t/undo-and-redo-button/27301)

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**Author:** [@Prxt.3k](https://discourse.processing.org/u/Prxt.3k)\
**Replies:** 4\
**Last updated:** [January 23, 2021, 5:59am UTC](https://discourse.processing.org/t/undo-and-redo-button/27301 "2021-01-23T05:59:57Z")

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// Press CTRL+Z to undo, CTRL+SHIFT+Z to redo // We need these to know if CTRL/SHIFT are pressed boolean controlDown = false; boolean shiftDown = false; Undo undo; void setup() { size(500, 500); background(255); …

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## [Adding a Start Screen to my drawing program](https://discourse.processing.org/t/adding-a-start-screen-to-my-drawing-program/27290)

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**Author:** [@Prxt.3k](https://discourse.processing.org/u/Prxt.3k)\
**Replies:** 5\
**Last updated:** [January 23, 2021, 5:18am UTC](https://discourse.processing.org/t/adding-a-start-screen-to-my-drawing-program/27290 "2021-01-23T05:18:14Z")

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Can someone let me know how it’s possible to add this to my code, for example, I want to add a start game button in this code and this screen should pop up every time I start a canvas and to enter the program I would nee…

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## [Length in milliseconds of .wav from Sampler class](https://discourse.processing.org/t/length-in-milliseconds-of-wav-from-sampler-class/27299)

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**Author:** [@dangerousclive](https://discourse.processing.org/u/dangerousclive)\
**Replies:** 0\
**Last updated:** [January 23, 2021, 12:31am UTC](https://discourse.processing.org/t/length-in-milliseconds-of-wav-from-sampler-class/27299 "2021-01-23T00:31:08Z")

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Hi, I’m having a bit of a problem trying to get the length of time in milliseconds of a .wav loaded into the Sampler class in Minim. I’m probably over looking something but can it be found by something as simple as .le…

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## [Different function to every ellipse](https://discourse.processing.org/t/different-function-to-every-ellipse/27289)

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**Author:** [@Karrajo](https://discourse.processing.org/u/Karrajo)\
**Replies:** 3\
**Last updated:** [January 22, 2021, 10:04pm UTC](https://discourse.processing.org/t/different-function-to-every-ellipse/27289 "2021-01-22T22:04:04Z")

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Hi, I’m doing this thing, trying to make every ellipse appear and disappear with the same function but in a different time, like if every ellipse is in a different moment of the sine function. I can write the function a…

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## [How to pull an image from a website](https://discourse.processing.org/t/how-to-pull-an-image-from-a-website/27285)

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**Author:** [@skypickle](https://discourse.processing.org/u/skypickle)\
**Replies:** 3\
**Last updated:** [January 22, 2021, 5:25pm UTC](https://discourse.processing.org/t/how-to-pull-an-image-from-a-website/27285 "2021-01-22T17:25:15Z")

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I want to use an image from a website as the basis for an interactive artwork. For example, this page “https://www.google.de/images/branding/googlelogo/2x/googlelogo\_color\_272x92dp.png” is a google logo. This script j…

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## [Where do these methods... live?](https://discourse.processing.org/t/where-do-these-methods-live/27286)

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**Author:** [@yoHill](https://discourse.processing.org/u/yoHill)\
**Replies:** 2\
**Last updated:** [January 22, 2021, 2:31pm UTC](https://discourse.processing.org/t/where-do-these-methods-live/27286 "2021-01-22T14:31:09Z")

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Hi, I have a question that may be really stupid but I just can’t quite wrap my head around what’s happening here. When using methods like void draw() or void mousePressed()… are these part of an interface somewhere? I …

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