# Latest

**URL:** https://discourse.processing.org/latest.md?page=180

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

**Page:** 181

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## [Trayecto que se da de un lugar a otro al clickear](https://discourse.processing.org/t/trayecto-que-se-da-de-un-lugar-a-otro-al-clickear/33278)

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**Author:** [@tati1202](https://discourse.processing.org/u/tati1202)\
**Replies:** 0\
**Last updated:** [November 3, 2021, 2:57am UTC](https://discourse.processing.org/t/trayecto-que-se-da-de-un-lugar-a-otro-al-clickear/33278 "2021-11-03T02:57:34Z")

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please format code with \</\> button \* homework policy \* asking questions https://github.com/BautiFelli/tecnomultimedia/tree/clPelota hola, no estamos pudiendo lograr que el trayecto de la pelota se de solo al clickea…

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## [How to Position Shape based on display size](https://discourse.processing.org/t/how-to-position-shape-based-on-display-size/33238)

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**Author:** [@avong](https://discourse.processing.org/u/avong)\
**Replies:** 5\
**Last updated:** [November 3, 2021, 11:12am UTC](https://discourse.processing.org/t/how-to-position-shape-based-on-display-size/33238 "2021-11-03T11:12:59Z")

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I wish to position buttons by calculating the x and y coordinates based on the display size. I did something like this: My laptop screen pixel is 1600x900. \< float x\_button1 =displayWidth-displayWidth/6; float y\_but…

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## [Creating perlin noise spheres/ blobs that reacts to mic on p5.js](https://discourse.processing.org/t/creating-perlin-noise-spheres-blobs-that-reacts-to-mic-on-p5-js/33243)

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**Author:** [@timtam198](https://discourse.processing.org/u/timtam198)\
**Replies:** 1\
**Last updated:** [November 3, 2021, 6:40am UTC](https://discourse.processing.org/t/creating-perlin-noise-spheres-blobs-that-reacts-to-mic-on-p5-js/33243 "2021-11-03T06:40:12Z")

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Hello, I am trying to create spheres that moves/distorts with mic inputs. I am trying to create a “blob” effect and found out that perlin noise creates an effect similar to what I envision. Does anyone knows how to apply…

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## [ERROR: The sketch path is not set](https://discourse.processing.org/t/error-the-sketch-path-is-not-set/33248)

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**Author:** [@lee](https://discourse.processing.org/u/lee)\
**Replies:** 1\
**Last updated:** [November 3, 2021, 12:45am UTC](https://discourse.processing.org/t/error-the-sketch-path-is-not-set/33248 "2021-11-03T00:45:16Z")

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This feels like an amateur question but I can’t seem to solve. I’m on Ubuntu 18.04 and have this issue with both Processing 3.5.4 as well as 4.0 When I try to run a sketch I get the following error: The sketch path is …

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## [\[Processing Android\] BLE GATT EXAMPLE](https://discourse.processing.org/t/processing-android-ble-gatt-example/33239)

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**Author:** [@GWAK](https://discourse.processing.org/u/GWAK)\
**Replies:** 3\
**Last updated:** [November 2, 2021, 11:45pm UTC](https://discourse.processing.org/t/processing-android-ble-gatt-example/33239 "2021-11-02T23:45:50Z")

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VIDEO(YOUTUBE) https://youtu.be/ilDFFb0BbH4 https://youtu.be/ilDFFb0BbH4 Processing SOURCE CODE BLE\_UART\_RAYTEMPBLUE.zip - Google Drive (You need to find the UUID carefully and write it down.) Arduino Code …

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## [Merging two sketches (pt.2)](https://discourse.processing.org/t/merging-two-sketches-pt-2/33259)

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**Author:** [@acb](https://discourse.processing.org/u/acb)\
**Replies:** 5\
**Last updated:** [November 2, 2021, 9:13pm UTC](https://discourse.processing.org/t/merging-two-sketches-pt-2/33259 "2021-11-02T21:13:35Z")

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As mentioned in my last post, I am trying to merge these codes but I keep getting the error; “java.lang.reflect.InvocationTargetException” . From my research I was not able to understand (I am new to coding), could anyon…

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## [How do I setUniform for an array of a custom struct?](https://discourse.processing.org/t/how-do-i-setuniform-for-an-array-of-a-custom-struct/33267)

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**Author:** [@modusponens](https://discourse.processing.org/u/modusponens)\
**Replies:** 2\
**Last updated:** [November 2, 2021, 7:51pm UTC](https://discourse.processing.org/t/how-do-i-setuniform-for-an-array-of-a-custom-struct/33267 "2021-11-02T19:51:54Z")

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I have a shader with this struct defined in it: struct LightInputData { vec3 worldPos; vec3 color; vec3 falloff; }; and it has this uniform variable: uniform LightInputData uPointLights\[8\]; How can I set this u…

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## [How to check if "marco" is typed in textbox?](https://discourse.processing.org/t/how-to-check-if-marco-is-typed-in-textbox/33255)

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**Author:** [@MoonAlien822](https://discourse.processing.org/u/MoonAlien822)\
**Replies:** 1\
**Last updated:** [November 2, 2021, 6:16pm UTC](https://discourse.processing.org/t/how-to-check-if-marco-is-typed-in-textbox/33255 "2021-11-02T18:16:08Z")

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how to check if marco is entered in the textbox and increase balance\[0\] by 75 when this happens for the first time static final int NUM = 2; final TextBox\[\] tboxes = new TextBox\[NUM\]; int idx; PImage shop; PImage …

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## [Change button name programmatically](https://discourse.processing.org/t/change-button-name-programmatically/33257)

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**Author:** [@Clark](https://discourse.processing.org/u/Clark)\
**Replies:** 2\
**Last updated:** [November 2, 2021, 5:04pm UTC](https://discourse.processing.org/t/change-button-name-programmatically/33257 "2021-11-02T17:04:08Z")

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Hi. Is it possible to change the name of a button programmatically? Something like: button = createButton("one"); button.position(0, 0); button.mousePressed(changeName); function changeName() { button.value = "two"…

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## [I want to create a pattern where i have 4 different squares in different colours that directly change color as a code. This is what i have, but i dont know how to change the color of the sqaures and then turn them back to normal in one time. Please help](https://discourse.processing.org/t/i-want-to-create-a-pattern-where-i-have-4-different-squares-in-different-colours-that-directly-change-color-as-a-code-this-is-what-i-have-but-i-dont-know-how-to-change-the-color-of-the-sqaures-and-then-turn-them-back-to-normal-in-one-time-please-help/33254)

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**Author:** [@LeRonald](https://discourse.processing.org/u/LeRonald)\
**Replies:** 1\
**Last updated:** [November 2, 2021, 12:25pm UTC](https://discourse.processing.org/t/i-want-to-create-a-pattern-where-i-have-4-different-squares-in-different-colours-that-directly-change-color-as-a-code-this-is-what-i-have-but-i-dont-know-how-to-change-the-color-of-the-sqaures-and-then-turn-them-back-to-normal-in-one-time-please-help/33254 "2021-11-02T12:25:27Z")

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please format code with \</\> button \* homework policy \* asking questions int lastTimeCheck; int timeIntervalFlag = 3000; // 3 seconds because we are working with millis void setup() { size(500,500); background(0); …

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## [Merging two sketches (for a school project)](https://discourse.processing.org/t/merging-two-sketches-for-a-school-project/33231)

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**Author:** [@acb](https://discourse.processing.org/u/acb)\
**Replies:** 3\
**Last updated:** [November 2, 2021, 12:44pm UTC](https://discourse.processing.org/t/merging-two-sketches-for-a-school-project/33231 "2021-11-02T12:44:23Z")

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I have been working on two codes that I would now like to have in the same frame, one over the other. I am asking for advice or just straight up the full solutions to merging these two codes. I have tried everything that…

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## [ControlP5 Radio button event](https://discourse.processing.org/t/controlp5-radio-button-event/33081)

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**Author:** [@MattC](https://discourse.processing.org/u/MattC)\
**Replies:** 2\
**Last updated:** [November 2, 2021, 11:27am UTC](https://discourse.processing.org/t/controlp5-radio-button-event/33081 "2021-11-02T11:27:55Z")

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Hi All, I tried to make an sketch with some ControlP5 elements (knobs and radio buttons). Idea is to based on the selected radio button, change specific value with knob. This I got working. the harder part is when i …

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## [How do I reverse the animation of a drawing in P5JS (more details in post)](https://discourse.processing.org/t/how-do-i-reverse-the-animation-of-a-drawing-in-p5js-more-details-in-post/33245)

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**Author:** [@mrloosid](https://discourse.processing.org/u/mrloosid)\
**Replies:** 1\
**Last updated:** [November 2, 2021, 9:24am UTC](https://discourse.processing.org/t/how-do-i-reverse-the-animation-of-a-drawing-in-p5js-more-details-in-post/33245 "2021-11-02T09:24:31Z")

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Source Code: p5.js Web Editor Basically I’m trying to do a pseudo generative poster that swaps between 3 artworks that I have predesigned. The idea is to make load one artpiece, wait a few seconds then reverse (essentia…

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## [How draw shapes in accordion?](https://discourse.processing.org/t/how-draw-shapes-in-accordion/33249)

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**Author:** [@yujunah](https://discourse.processing.org/u/yujunah)\
**Replies:** 0\
**Last updated:** [November 2, 2021, 7:05am UTC](https://discourse.processing.org/t/how-draw-shapes-in-accordion/33249 "2021-11-02T07:05:35Z")

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import controlP5.\*; ControlP5 cp5; Accordion accordion; color c = color(0, 160, 100); void setup() { size(400, 600); noStroke(); smooth(); gui(); } void gui() { cp5 = new ControlP5(this); // group number 1, c…

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## [Creating perlin noise spheres/ blobs that reacts to mic](https://discourse.processing.org/t/creating-perlin-noise-spheres-blobs-that-reacts-to-mic/33241)

<div class="topic-metadata">

**Author:** [@timtam198](https://discourse.processing.org/u/timtam198)\
**Replies:** 0\
**Last updated:** [November 2, 2021, 4:23am UTC](https://discourse.processing.org/t/creating-perlin-noise-spheres-blobs-that-reacts-to-mic/33241 "2021-11-02T04:23:38Z")

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Hello, I am trying to create spheres that reacts and distorts with mic inputs. I did some research and thought that perlin noise can create the effect I visualise. I wonder if anyone knows how to add perlin noise to my s…

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## [Text position on screen](https://discourse.processing.org/t/text-position-on-screen/33234)

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**Author:** [@hacketet](https://discourse.processing.org/u/hacketet)\
**Replies:** 4\
**Last updated:** [November 2, 2021, 1:54am UTC](https://discourse.processing.org/t/text-position-on-screen/33234 "2021-11-02T01:54:54Z")

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Here’s the code I had to use to get text placed in a 30 x 22 rectangle. From the documentation I expected th using the diagonal coordinates of the rectangle to properly place the text, but it was WAY off. I had to mult…

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## [Strategy for drawing tree contour](https://discourse.processing.org/t/strategy-for-drawing-tree-contour/33127)

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**Author:** [@ishback](https://discourse.processing.org/u/ishback)\
**Replies:** 7\
**Last updated:** [November 2, 2021, 12:53am UTC](https://discourse.processing.org/t/strategy-for-drawing-tree-contour/33127 "2021-11-02T00:53:59Z")

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Hello, I’m trying to draw the contour of a tree. This is how I’m doing it so far: Create the branches (center line, in green) Create segments for each branch. Each segment stores a length, an angle, and a thickness. C…

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## [How to have textbox only appear when boolean is true?](https://discourse.processing.org/t/how-to-have-textbox-only-appear-when-boolean-is-true/33235)

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**Author:** [@MoonAlien822](https://discourse.processing.org/u/MoonAlien822)\
**Replies:** 0\
**Last updated:** [November 1, 2021, 9:10pm UTC](https://discourse.processing.org/t/how-to-have-textbox-only-appear-when-boolean-is-true/33235 "2021-11-01T21:10:21Z")

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I want to make the textbox only appear when killb=true, how do i do this? static final int NUM = 2; final TextBox\[\] tboxes = new TextBox\[NUM\]; int idx; PImage shop; PImage settings; PImage teams; PImage kill; PImage…

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## [Scaling down & rotating a pattern causes rendering issues and flickering](https://discourse.processing.org/t/scaling-down-rotating-a-pattern-causes-rendering-issues-and-flickering/33227)

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**Author:** [@miracle2k](https://discourse.processing.org/u/miracle2k)\
**Replies:** 1\
**Last updated:** [November 1, 2021, 8:49pm UTC](https://discourse.processing.org/t/scaling-down-rotating-a-pattern-causes-rendering-issues-and-flickering/33227 "2021-11-01T20:49:58Z")

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Take this sketch as an example, which I created to reproduce the problem in isolation: https://editor.p5js.org/elsdoerfer/sketches/NrPcyu-mG It’s supposed to be a striped line pattern. I want it to be very fine, 1px li…

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## [Nf() number format decimal places to array using for loop](https://discourse.processing.org/t/nf-number-format-decimal-places-to-array-using-for-loop/33182)

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**Author:** [@louise00](https://discourse.processing.org/u/louise00)\
**Replies:** 4\
**Last updated:** [November 1, 2021, 6:36pm UTC](https://discourse.processing.org/t/nf-number-format-decimal-places-to-array-using-for-loop/33182 "2021-11-01T18:36:05Z")

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I’m migrating from p5js to processing and something from p5js that works really well its just getting stuck in processing. I’m trying to: • Define a PImage array • Load a set of images that are named 0.jpg ~ 11.jpg • …

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## [Why is it not displaying my typed keys?](https://discourse.processing.org/t/why-is-it-not-displaying-my-typed-keys/33230)

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**Author:** [@MoonAlien822](https://discourse.processing.org/u/MoonAlien822)\
**Replies:** 0\
**Last updated:** [November 1, 2021, 6:24pm UTC](https://discourse.processing.org/t/why-is-it-not-displaying-my-typed-keys/33230 "2021-11-01T18:24:39Z")

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i would like text to show up in the rectangle that appears when kill is true, but it’s not working. why? PImage shop; PImage settings; PImage teams; PImage kill; PImage phone; PImage coin; PImage bounty; boolean invert…

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## [Calling a PShape too many times](https://discourse.processing.org/t/calling-a-pshape-too-many-times/33209)

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**Author:** [@bcabc](https://discourse.processing.org/u/bcabc)\
**Replies:** 1\
**Last updated:** [November 1, 2021, 5:58pm UTC](https://discourse.processing.org/t/calling-a-pshape-too-many-times/33209 "2021-11-01T17:58:57Z")

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Hi there - I am calling PShape Shape1 within a for loop. for (Shape1 mod : mods) { mod.display(); I have set a value for an array of mods elsewhere in the code. mods = new Shape1\[count\*someother\]; My issue …

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## [Movement to where I touch on the screen](https://discourse.processing.org/t/movement-to-where-i-touch-on-the-screen/33193)

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**Author:** [@tati1202](https://discourse.processing.org/u/tati1202)\
**Replies:** 3\
**Last updated:** [November 1, 2021, 3:50pm UTC](https://discourse.processing.org/t/movement-to-where-i-touch-on-the-screen/33193 "2021-11-01T15:50:36Z")

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Hey, I’m working in this videogame where you have to shoot the ball pressing in x place in the net/goal. Does anyone knows how to incorporate this with easy coding? Thanks

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## [Array sorting of file paths](https://discourse.processing.org/t/array-sorting-of-file-paths/33096)

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**Author:** [@garrettlynch](https://discourse.processing.org/u/garrettlynch)\
**Replies:** 8\
**Last updated:** [November 1, 2021, 10:17am UTC](https://discourse.processing.org/t/array-sorting-of-file-paths/33096 "2021-11-01T10:17:33Z")

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I am creating an array from a directory of images using listFiles() and then sorting them like so. images = dir.listFiles(new FileFilter() { @Override public boolean accept(File pathname) { …

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## [How to create a good fractal zoom?](https://discourse.processing.org/t/how-to-create-a-good-fractal-zoom/33217)

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**Author:** [@CodeMasterX](https://discourse.processing.org/u/CodeMasterX)\
**Replies:** 0\
**Last updated:** [November 1, 2021, 9:29am UTC](https://discourse.processing.org/t/how-to-create-a-good-fractal-zoom/33217 "2021-11-01T09:29:30Z")

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Hi! I created a mandelbrot set explorer, with which, you can zoom into the fractal if you use the mouse wheel. But I can’t seem to get the mouse wheel zoom working correctly. What can I do to fix it? Right now, both zo…

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## [Color interpolation in HSB - how to go the "closest" direction?](https://discourse.processing.org/t/color-interpolation-in-hsb-how-to-go-the-closest-direction/33211)

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**Author:** [@dtreybig](https://discourse.processing.org/u/dtreybig)\
**Replies:** 2\
**Last updated:** [November 1, 2021, 7:13am UTC](https://discourse.processing.org/t/color-interpolation-in-hsb-how-to-go-the-closest-direction/33211 "2021-11-01T07:13:48Z")

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Hi! I am exploring doing some color gradients in something I am working on. I generally have the core structure working well, defining multiple colors and using lerpColor() to linearly interpolate between them. The chal…

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## [The pixels array is null using setTexture()](https://discourse.processing.org/t/the-pixels-array-is-null-using-settexture/23712)

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**Author:** [@garrettlynch](https://discourse.processing.org/u/garrettlynch)\
**Replies:** 8\
**Last updated:** [October 31, 2021, 10:46pm UTC](https://discourse.processing.org/t/the-pixels-array-is-null-using-settexture/23712 "2021-10-31T22:46:08Z")

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Running the simple sketch below on Android I keep getting “The pixels array is null.” error. The error does not happen when I use Java mode on my computer. From what I’ve read this error is usually caused by a missing lo…

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## [Cross-language random numbers](https://discourse.processing.org/t/cross-language-random-numbers/3474)

<div class="topic-metadata">

**Author:** [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)\
**Replies:** 21\
**Last updated:** [October 31, 2021, 9:23pm UTC](https://discourse.processing.org/t/cross-language-random-numbers/3474 "2021-10-31T21:23:35Z")

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I have developed a set of demo sketches that implement simple cross-language random numbers. The goal is to make it easy to adapt a sketch between Processing (Java), p5.js (JavaScript), or Processing.py (Python) such th…

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## [How to make more images appear over time?](https://discourse.processing.org/t/how-to-make-more-images-appear-over-time/33194)

<div class="topic-metadata">

**Author:** [@MoonAlien822](https://discourse.processing.org/u/MoonAlien822)\
**Replies:** 1\
**Last updated:** [October 31, 2021, 6:50pm UTC](https://discourse.processing.org/t/how-to-make-more-images-appear-over-time/33194 "2021-10-31T18:50:40Z")

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hey right now there is only one “trash” image but i’m trying to make it so the amount of “trash” images is equal to score+1 here’s my code: float trashX; float trashY; float boatX; float boatY; float ropelenght = 0; …

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## [Web Server. Load image?](https://discourse.processing.org/t/web-server-load-image/20356)

<div class="topic-metadata">

**Author:** [@Omnimusha](https://discourse.processing.org/u/Omnimusha)\
**Replies:** 2\
**Last updated:** [October 31, 2021, 9:40am UTC](https://discourse.processing.org/t/web-server-load-image/20356 "2021-10-31T09:40:35Z")

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Hi. how to upload an image from my pc? c.write("\<img src=1.jpg\>"); import processing.net.\*; String HTTP\_GET\_REQUEST = "GET /"; String HTTP\_HEADER = "HTTP/1.0 200 OK\\r\\nContent-Type: text/html\\r\\n\\r\\n"; Server s; Clie…

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