# Processing

**URL:** https://discourse.processing.org/c/processing/6.md?page=363

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

**Page:** 364

---

## [\[SOLVED\] How do you redraw over this pixel array?](https://discourse.processing.org/t/solved-how-do-you-redraw-over-this-pixel-array/3749)

<div class="topic-metadata">

**Author:** [@ProsExplorer](https://discourse.processing.org/u/ProsExplorer)\
**Replies:** 1\
**Last updated:** [September 26, 2018, 6:04am UTC](https://discourse.processing.org/t/solved-how-do-you-redraw-over-this-pixel-array/3749 "2018-09-26T06:04:24Z")

</div>

Hello all, I’m trying to redraw over this 2D pixel array of this program. // main setup settings int dimy = 800; // screen width 1681 int dimx = 850; //screen height 1019 int bailout = 2000; …

---

## [What's possible with ellipse()?](https://discourse.processing.org/t/whats-possible-with-ellipse/3462)

<div class="topic-metadata">

**Author:** [@HackinHarry](https://discourse.processing.org/u/HackinHarry)\
**Replies:** 17\
**Last updated:** [September 26, 2018, 5:37am UTC](https://discourse.processing.org/t/whats-possible-with-ellipse/3462 "2018-09-26T05:37:48Z")

</div>

I play around with celestial navigation and processing to visualize things, some involve lots of trig. What I’ve used so far is shapes3d to build spheres, as in celestial sphere or earth sphere, then plot points for sta…

---

## [Anyone have any Improvements?](https://discourse.processing.org/t/anyone-have-any-improvements/3812)

<div class="topic-metadata">

**Author:** [@Godemperor949](https://discourse.processing.org/u/Godemperor949)\
**Replies:** 12\
**Last updated:** [September 25, 2018, 10:42pm UTC](https://discourse.processing.org/t/anyone-have-any-improvements/3812 "2018-09-25T22:42:13Z")

</div>

//Jeopardy, by Isaiah Johnson. PFont digits;//font Cell\[\] grid; //makes each individual cells int cols; //how many colloms int rows; // how many rows int numA=0;// number of questions answered int p;// the cell that was …

---

## [\[SOLVED\] Importing other Processing classes](https://discourse.processing.org/t/solved-importing-other-processing-classes/3708)

<div class="topic-metadata">

**Author:** [@delsey](https://discourse.processing.org/u/delsey)\
**Replies:** 7\
**Last updated:** [September 25, 2018, 8:46pm UTC](https://discourse.processing.org/t/solved-importing-other-processing-classes/3708 "2018-09-25T20:46:40Z")

</div>

Hello, this question might seem very blatant but I could’t figure it out by googleing and searching the forums. I would like to sort the different classes in subfolders of the project (eg. gui, algorithm) and then impor…

---

## [How can I get center point of each a bunch of red points](https://discourse.processing.org/t/how-can-i-get-center-point-of-each-a-bunch-of-red-points/3823)

<div class="topic-metadata">

**Author:** [@leereset](https://discourse.processing.org/u/leereset)\
**Replies:** 5\
**Last updated:** [September 25, 2018, 8:28pm UTC](https://discourse.processing.org/t/how-can-i-get-center-point-of-each-a-bunch-of-red-points/3823 "2018-09-25T20:28:23Z")

</div>

Hi I’m using processing to make some good project. explanation of project: Detect hand based on depth and draw the circle on each hand. Progress: I can find center but there’s issue. If two bunch of pixels exist, i…

---

## [Frame rate logic in draw -- locating it in the source code](https://discourse.processing.org/t/frame-rate-logic-in-draw-locating-it-in-the-source-code/3840)

<div class="topic-metadata">

**Author:** [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)\
**Replies:** 1\
**Last updated:** [September 25, 2018, 7:02pm UTC](https://discourse.processing.org/t/frame-rate-logic-in-draw-locating-it-in-the-source-code/3840 "2018-09-25T19:02:39Z")

</div>

I am trying to track down the code that Processing uses to change the frameRate() into decisions about when to lag or speed up individual frame start times – including where the default frameRate() goal is stored, how it…

---

## [Stereo output w. Minim](https://discourse.processing.org/t/stereo-output-w-minim/3837)

<div class="topic-metadata">

**Author:** [@jeppius](https://discourse.processing.org/u/jeppius)\
**Replies:** 0\
**Last updated:** [September 25, 2018, 6:12pm UTC](https://discourse.processing.org/t/stereo-output-w-minim/3837 "2018-09-25T18:12:53Z")

</div>

Hi, what would be the general approach to send audio independently to either the Right or the Left channel of an AudioOutput object?

---

## [\[RESOLVED\] Unable to build for mac](https://discourse.processing.org/t/resolved-unable-to-build-for-mac/3756)

<div class="topic-metadata">

**Author:** [@Bunnygamers](https://discourse.processing.org/u/Bunnygamers)\
**Replies:** 4\
**Last updated:** [September 25, 2018, 5:55pm UTC](https://discourse.processing.org/t/resolved-unable-to-build-for-mac/3756 "2018-09-25T17:55:40Z")

</div>

I made a small thing using processing 3.3.7 on Windows 10 (32bit) but I can't seem to build for mac (checkbox for mac is grey), can someone help

---

## [Recursively delete directory](https://discourse.processing.org/t/recursively-delete-directory/3766)

<div class="topic-metadata">

**Author:** [@elaner](https://discourse.processing.org/u/elaner)\
**Replies:** 3\
**Last updated:** [September 25, 2018, 5:41pm UTC](https://discourse.processing.org/t/recursively-delete-directory/3766 "2018-09-25T17:41:33Z")

</div>

I need to delete a directory that has files in it. Anyone have code to do this? I have tried a number of Java routines I found online but without luck.

---

## [Feedback on my code](https://discourse.processing.org/t/feedback-on-my-code/3764)

<div class="topic-metadata">

**Author:** [@jonaspower](https://discourse.processing.org/u/jonaspower)\
**Replies:** 7\
**Last updated:** [September 25, 2018, 5:35pm UTC](https://discourse.processing.org/t/feedback-on-my-code/3764 "2018-09-25T17:35:16Z")

</div>

Hi im new to processing and i have made this program (Its a timer/alarm) here is the code (probably doesnt work because of the sound thing but to make it work remember to have the sound and put a file next to the code c…

---

## [\[SOLVED\] \[Cp5\] Do something as textfield loses focus](https://discourse.processing.org/t/solved-cp5-do-something-as-textfield-loses-focus/3757)

<div class="topic-metadata">

**Author:** [@delsey](https://discourse.processing.org/u/delsey)\
**Replies:** 3\
**Last updated:** [September 25, 2018, 5:11pm UTC](https://discourse.processing.org/t/solved-cp5-do-something-as-textfield-loses-focus/3757 "2018-09-25T17:11:22Z")

</div>

I would like to check the value of cp5 textfields as soon as they lose focus. The only thing I found regarding this, it that textfields have an .isFocus() method, but I cant think of a smart way to utilize this. You wou…

---

## [Rotate Camera around it's own axis](https://discourse.processing.org/t/rotate-camera-around-its-own-axis/3774)

<div class="topic-metadata">

**Author:** [@Keheck](https://discourse.processing.org/u/Keheck)\
**Replies:** 1\
**Last updated:** [September 25, 2018, 4:56pm UTC](https://discourse.processing.org/t/rotate-camera-around-its-own-axis/3774 "2018-09-25T16:56:53Z")

</div>

I’d like to know if there is a way to rotate a 3D camera atound it’s own axis. I want to create a 3D game like Minecraft and for that I of course need to make the camera be rotatable I tried following code (unnecessary c…

---

## [Generative code](https://discourse.processing.org/t/generative-code/3725)

<div class="topic-metadata">

**Author:** [@mturel](https://discourse.processing.org/u/mturel)\
**Replies:** 4\
**Last updated:** [September 25, 2018, 5:44am UTC](https://discourse.processing.org/t/generative-code/3725 "2018-09-25T05:44:04Z")

</div>

Hi, I’m a beginner at coding and I’m wondering if anyone could help me with some code I’m writing. I have a bunch of seed vector files that I would like the code to randomly overlay zoom in, rotate to create new pieces …

---

## [Integrating Processing to Sublime](https://discourse.processing.org/t/integrating-processing-to-sublime/2225)

<div class="topic-metadata">

**Author:** [@Quillbert1](https://discourse.processing.org/u/Quillbert1)\
**Replies:** 16\
**Last updated:** [August 9, 2018, 1:25am UTC](https://discourse.processing.org/t/integrating-processing-to-sublime/2225 "2018-08-09T01:25:37Z")

</div>

I was trying to use processing-java to open a processing sketch. I am running windows 10 and processing 3.3.7. I right clicked and used the open with menu to select the processing-java. Am I using processing-java correct…

---

## [The Somewhat Possible Game by Kristoffer Pauly](https://discourse.processing.org/t/the-somewhat-possible-game-by-kristoffer-pauly/3739)

<div class="topic-metadata">

**Author:** [@tefa](https://discourse.processing.org/u/tefa)\
**Replies:** 3\
**Last updated:** [September 25, 2018, 2:42am UTC](https://discourse.processing.org/t/the-somewhat-possible-game-by-kristoffer-pauly/3739 "2018-09-25T02:42:08Z")

</div>

Hello Dear Processors, I found an awesome game I want to learn from https://www.dropbox.com/s/6yvuv1i84u41j0m/The\_Somewhat\_Possible\_Game.zip?dl=0 but it is throwing an ArrayIndexOutOfBoundsException: 3 error and highligh…

---

## [Null pointer when accessing variable from another class](https://discourse.processing.org/t/null-pointer-when-accessing-variable-from-another-class/3702)

<div class="topic-metadata">

**Author:** [@ddownn](https://discourse.processing.org/u/ddownn)\
**Replies:** 3\
**Last updated:** [September 20, 2018, 7:45pm UTC](https://discourse.processing.org/t/null-pointer-when-accessing-variable-from-another-class/3702 "2018-09-20T19:45:10Z")

</div>

Okay, I’m having another learning experience here. I don’t know what’s going wrong with this. I’m experimenting with how classes work together, and how to pass data between them. When I run this code, I get a NullPointe…

---

## [Repeat lines until an event happens](https://discourse.processing.org/t/repeat-lines-until-an-event-happens/3753)

<div class="topic-metadata">

**Author:** [@Schred](https://discourse.processing.org/u/Schred)\
**Replies:** 4\
**Last updated:** [September 24, 2018, 3:07pm UTC](https://discourse.processing.org/t/repeat-lines-until-an-event-happens/3753 "2018-09-24T15:07:58Z")

</div>

Hello, I’m new here, and I’m simply searching for a way to repeat a line of code unlimited times (in one draw passing) until the wanted event happens. Is there any way to do so?

---

## [How to use the Processing XML class in other Java Editors?](https://discourse.processing.org/t/how-to-use-the-processing-xml-class-in-other-java-editors/3700)

<div class="topic-metadata">

**Author:** [@Paul94](https://discourse.processing.org/u/Paul94)\
**Replies:** 3\
**Last updated:** [September 24, 2018, 1:28pm UTC](https://discourse.processing.org/t/how-to-use-the-processing-xml-class-in-other-java-editors/3700 "2018-09-24T13:28:48Z")

</div>

Hello, I want to use the XML class in BlueJ but it doesn’t work. I have tried several others like PFont for example which does work. As I found out the class XML is part of the core library.

---

## [\[SOLVED\] Problems with PVectors](https://discourse.processing.org/t/solved-problems-with-pvectors/3715)

<div class="topic-metadata">

**Author:** [@OrigamiBoy](https://discourse.processing.org/u/OrigamiBoy)\
**Replies:** 2\
**Last updated:** [September 24, 2018, 1:23pm UTC](https://discourse.processing.org/t/solved-problems-with-pvectors/3715 "2018-09-24T13:23:01Z")

</div>

Hey all, I am having some problems with changing the values with PVectors. Here is my code: Rocket rocket = new Rocket(); void keyPressed() { switch(key) { case 'w': rocket.up(); case 's': rocket.dow…

---

## [Start/Stop button | can't figure this out](https://discourse.processing.org/t/start-stop-button-cant-figure-this-out/3784)

<div class="topic-metadata">

**Author:** [@SolDrakibane](https://discourse.processing.org/u/SolDrakibane)\
**Replies:** 2\
**Last updated:** [September 24, 2018, 11:10am UTC](https://discourse.processing.org/t/start-stop-button-cant-figure-this-out/3784 "2018-09-24T11:10:34Z")

</div>

So, the code below creates a bullseye that moves from the middle to the right and starts at the left again and loops. When i click the Start button the bullseye moves, the text switches to Stop. When i click the button a…

---

## [Playing videos frame by frame](https://discourse.processing.org/t/playing-videos-frame-by-frame/2900)

<div class="topic-metadata">

**Author:** [@grumo](https://discourse.processing.org/u/grumo)\
**Replies:** 4\
**Last updated:** [September 24, 2018, 2:25am UTC](https://discourse.processing.org/t/playing-videos-frame-by-frame/2900 "2018-09-24T02:25:45Z")

</div>

I found a few posts in older forums but I can’t find a definitive answer. I have multiple videos in a collage. I want to save the frame of the whole composition to render it in a sequence of PNGs. The thing is: I can’t…

---

## [Transform text to colored pixels?](https://discourse.processing.org/t/transform-text-to-colored-pixels/3633)

<div class="topic-metadata">

**Author:** [@MAKESHADY](https://discourse.processing.org/u/MAKESHADY)\
**Replies:** 3\
**Last updated:** [September 24, 2018, 2:03am UTC](https://discourse.processing.org/t/transform-text-to-colored-pixels/3633 "2018-09-24T02:03:20Z")

</div>

I would like to create and image composed by a text. I would like to say on processing " a = blue pixel, b = red pixel … ". Transform 100 letters on 10x10 image ( or larger ). THX !

---

## [Drag and Drop Rectangle](https://discourse.processing.org/t/drag-and-drop-rectangle/3762)

<div class="topic-metadata">

**Author:** [@butterycowegg](https://discourse.processing.org/u/butterycowegg)\
**Replies:** 3\
**Last updated:** [September 23, 2018, 6:01pm UTC](https://discourse.processing.org/t/drag-and-drop-rectangle/3762 "2018-09-23T18:01:48Z")

</div>

I am new to Processing and am trying to write a program that allows you to drag and drop a rectangle. Whenever I click on the rectangle, the mouse locations becomes the new top left corner of the rectangle. How can I mak…

---

## [From 0 to 100 script](https://discourse.processing.org/t/from-0-to-100-script/3667)

<div class="topic-metadata">

**Author:** [@netillo](https://discourse.processing.org/u/netillo)\
**Replies:** 4\
**Last updated:** [September 23, 2018, 4:43am UTC](https://discourse.processing.org/t/from-0-to-100-script/3667 "2018-09-23T04:43:22Z")

</div>

Hello everyone, I’m trying to write a script that goes from which goes from 0 to 100 in 10 minutes with the look of a digital clock. I hope someone can help. Thank you! Cordially, Netillo

---

## [\[SOLVED\] Unexpected token:processing error in code drawn from an author's code](https://discourse.processing.org/t/solved-unexpected-token-processing-error-in-code-drawn-from-an-authors-code/3653)

<div class="topic-metadata">

**Author:** [@bobhurd](https://discourse.processing.org/u/bobhurd)\
**Replies:** 17\
**Last updated:** [September 23, 2018, 12:52am UTC](https://discourse.processing.org/t/solved-unexpected-token-processing-error-in-code-drawn-from-an-authors-code/3653 "2018-09-23T00:52:25Z")

</div>

The following code yields the error “unexpected token: processing”. What am I missing? It’s a straight copy of an author’s code (from “Arduino Projects Book”) that apparently did not get this error… Did I not install …

---

## [Focus on item from ArrayList in zty.pe like game](https://discourse.processing.org/t/focus-on-item-from-arraylist-in-zty-pe-like-game/3522)

<div class="topic-metadata">

**Author:** [@Pyrros](https://discourse.processing.org/u/Pyrros)\
**Replies:** 14\
**Last updated:** [September 22, 2018, 10:52pm UTC](https://discourse.processing.org/t/focus-on-item-from-arraylist-in-zty-pe-like-game/3522 "2018-09-22T22:52:21Z")

</div>

I am in the process of making a zty.pe game, and I have defined classes for own ship, enemies (those meant to be shot with words) as well as a projectile which own ship fires. The Enemy-class item has a string assigned w…

---

## [How to use a variable name that's stored inside the variable? Reflection?](https://discourse.processing.org/t/how-to-use-a-variable-name-thats-stored-inside-the-variable-reflection/3730)

<div class="topic-metadata">

**Author:** [@Luka](https://discourse.processing.org/u/Luka)\
**Replies:** 7\
**Last updated:** [September 22, 2018, 5:12pm UTC](https://discourse.processing.org/t/how-to-use-a-variable-name-thats-stored-inside-the-variable-reflection/3730 "2018-09-22T17:12:26Z")

</div>

I’m trying to control a sketch through OSC from another application (SuperCollider). I want to be able to pass control data (integers) to various variables in the sketch by naming them in the OSC message. For example I …

---

## [Nested loops, ending "early"](https://discourse.processing.org/t/nested-loops-ending-early/3726)

<div class="topic-metadata">

**Author:** [@ddownn](https://discourse.processing.org/u/ddownn)\
**Replies:** 3\
**Last updated:** [September 22, 2018, 4:49pm UTC](https://discourse.processing.org/t/nested-loops-ending-early/3726 "2018-09-22T16:49:00Z")

</div>

Now I have this question about nested loops. With the buildTiles() method, I would like to have the option to create fewer Tile objects than grid cells, but still number them in the “id” field, and assign the grid cell …

---

## [Quiz game - need help](https://discourse.processing.org/t/quiz-game-need-help/3166)

<div class="topic-metadata">

**Author:** [@Pedro](https://discourse.processing.org/u/Pedro)\
**Replies:** 30\
**Last updated:** [September 22, 2018, 12:42pm UTC](https://discourse.processing.org/t/quiz-game-need-help/3166 "2018-09-22T12:42:24Z")

</div>

I’m doing a Quiz game, so I want to put the questions in a different order automatically. I would have to number each question and use random (), but I do not know how it is numbered. I have not done anything yet.

---

## [Accessing functions from Java Generics](https://discourse.processing.org/t/accessing-functions-from-java-generics/3391)

<div class="topic-metadata">

**Author:** [@Sarah](https://discourse.processing.org/u/Sarah)\
**Replies:** 18\
**Last updated:** [September 10, 2018, 11:58am UTC](https://discourse.processing.org/t/accessing-functions-from-java-generics/3391 "2018-09-10T11:58:30Z")

</div>

Hi! Recently I’ve been making some classes to carry out functions, but when making them, I’ve only been able to use 1 class for one object. For example, class Sorter { Point\[\] points; Sorter(Point\[\] points\_) { …

[Previous page](https://discourse.processing.org/c/processing/6.md?page=362)

[Next page](https://discourse.processing.org/c/processing/6.md?page=364)