# Latest

**URL:** https://discourse.processing.org/latest.md?no_subcategories=false&page=538

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

**Page:** 539

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## [Make a program with percentage](https://discourse.processing.org/t/make-a-program-with-percentage/6677)

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**Author:** [@justin38](https://discourse.processing.org/u/justin38)\
**Replies:** 17\
**Last updated:** [January 6, 2019, 7:09pm UTC](https://discourse.processing.org/t/make-a-program-with-percentage/6677 "2019-01-06T19:09:46Z")

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Hello, I would like to create a code where we can move shield shapes on a warrior and know the percentage of the warrior covered, I unfortunately do not know how to do it, help me please

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## ["Mirroring" PShape objects (translation / rotation issue)](https://discourse.processing.org/t/mirroring-pshape-objects-translation-rotation-issue/7099)

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**Author:** [@solub](https://discourse.processing.org/u/solub)\
**Replies:** 6\
**Last updated:** [January 6, 2019, 5:55pm UTC](https://discourse.processing.org/t/mirroring-pshape-objects-translation-rotation-issue/7099 "2019-01-06T17:55:17Z")

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Hi, I’m trying to “mirror” a PShape object like in the picture below: The tricky part is not to invert the shape but to rotate it (and maybe translating it ?) so as it sticks to the preceding shape. I’ve been trying …

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## [Adding integer to an array (Java)](https://discourse.processing.org/t/adding-integer-to-an-array-java/7247)

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**Author:** [@J0R1AN](https://discourse.processing.org/u/J0R1AN)\
**Replies:** 4\
**Last updated:** [January 6, 2019, 5:54pm UTC](https://discourse.processing.org/t/adding-integer-to-an-array-java/7247 "2019-01-06T17:54:16Z")

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Hello everyone, I was experimenting a bit with arrays and integers but I found myself having trouble with adding numbers to an array. I want to create an array, add a number to the array (so the length increases) and pr…

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## [Program which changes the color of a circle based on which key is pressed](https://discourse.processing.org/t/program-which-changes-the-color-of-a-circle-based-on-which-key-is-pressed/7233)

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**Author:** [@Umar2003](https://discourse.processing.org/u/Umar2003)\
**Replies:** 5\
**Last updated:** [January 6, 2019, 10:47am UTC](https://discourse.processing.org/t/program-which-changes-the-color-of-a-circle-based-on-which-key-is-pressed/7233 "2019-01-06T10:47:21Z")

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I’m trying to write a Write a program which changes the color of a circle based on which key is pressed. Here are the colors and their corresponding keys: Nothing Pressed - Black Y - Yellow G - Green R - Red B - Bl…

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## [Question: Processing on Archlinux | Using Emacs as external editor](https://discourse.processing.org/t/question-processing-on-archlinux-using-emacs-as-external-editor/6809)

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**Author:** [@nyquil](https://discourse.processing.org/u/nyquil)\
**Replies:** 3\
**Last updated:** [January 6, 2019, 7:01am UTC](https://discourse.processing.org/t/question-processing-on-archlinux-using-emacs-as-external-editor/6809 "2019-01-06T07:01:58Z")

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Hello, I just got interested in Processing lately and thinking of trying it out. Does anyone run archlinux by any chance? There is this processing package (Processing 3.4-2) in arch’s official repo, but after the insta…

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## [3D Mode(WEBGL) Changes the colors of mysketch](https://discourse.processing.org/t/3d-mode-webgl-changes-the-colors-of-mysketch/6199)

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**Author:** [@gio](https://discourse.processing.org/u/gio)\
**Replies:** 5\
**Last updated:** [January 6, 2019, 6:08am UTC](https://discourse.processing.org/t/3d-mode-webgl-changes-the-colors-of-mysketch/6199 "2019-01-06T06:08:08Z")

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Hi, I just changed a 2d sketch to be 3D with the WEBGL option. I wanted to shift perpective, and that works perfectly, but somehow the colors are now different. Im guessing now its using some kind of 3d lamp, but i wan…

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## [How to deduct 1 health point if a moving triangle collides with a moving point?](https://discourse.processing.org/t/how-to-deduct-1-health-point-if-a-moving-triangle-collides-with-a-moving-point/7240)

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**Author:** [@francium401](https://discourse.processing.org/u/francium401)\
**Replies:** 4\
**Last updated:** [January 6, 2019, 2:36am UTC](https://discourse.processing.org/t/how-to-deduct-1-health-point-if-a-moving-triangle-collides-with-a-moving-point/7240 "2019-01-06T02:36:57Z")

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I want to figure out how to deduct 1 health point if a moving triangle collides with any moving point, and make that one particular point that has the triangle collided with disappear (if that’s possible). Just to note t…

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## [Functions Problem; Rows of squares](https://discourse.processing.org/t/functions-problem-rows-of-squares/7231)

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**Author:** [@Umer1](https://discourse.processing.org/u/Umer1)\
**Replies:** 5\
**Last updated:** [January 6, 2019, 12:52am UTC](https://discourse.processing.org/t/functions-problem-rows-of-squares/7231 "2019-01-06T00:52:07Z")

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Hi does anyone know how to do rows of squares using functions? This is what I have so far: void setup() { size(500,500); background(255); } void draw() { background(255); stroke(5); int x = 10; int …

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## [Rope physics prototype 3D](https://discourse.processing.org/t/rope-physics-prototype-3d/7021)

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**Author:** [@BennyHacker](https://discourse.processing.org/u/BennyHacker)\
**Replies:** 5\
**Last updated:** [January 1, 2019, 2:25pm UTC](https://discourse.processing.org/t/rope-physics-prototype-3d/7021 "2019-01-01T14:25:18Z")

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Here is an example where a 3D rope can be controlled with the mouse. Press ‘w’ to toggle wind, ‘g’ to toggle gravity, space to pause and mouse wheel to increase/decrease wind strength. Boxes can be spawned by pressing ‘1…

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## [Program which draws an \`I\` if no keys are pressed, and an \`E\`or an \`F\`if those keys are pressed](https://discourse.processing.org/t/program-which-draws-an-i-if-no-keys-are-pressed-and-an-e-or-an-f-if-those-keys-are-pressed/7207)

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**Author:** [@Umar2003](https://discourse.processing.org/u/Umar2003)\
**Replies:** 9\
**Last updated:** [January 5, 2019, 9:49pm UTC](https://discourse.processing.org/t/program-which-draws-an-i-if-no-keys-are-pressed-and-an-e-or-an-f-if-those-keys-are-pressed/7207 "2019-01-05T21:49:04Z")

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I’m trying to write a program which draws an I if no keys are pressed, and an Eor an Fif those keys are pressed. Use straight lines to draw these letters. The window size is (120,120).

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## [Problem with this triangle that keeps randomly changing size](https://discourse.processing.org/t/problem-with-this-triangle-that-keeps-randomly-changing-size/7232)

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**Author:** [@francium401](https://discourse.processing.org/u/francium401)\
**Replies:** 1\
**Last updated:** [January 5, 2019, 9:48pm UTC](https://discourse.processing.org/t/problem-with-this-triangle-that-keeps-randomly-changing-size/7232 "2019-01-05T21:48:39Z")

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I’m only guessing that it has something to do with the fact that the moving circles are changing size, that it somehow makes the triangle do so as well. How would I go about keeping the triangle at a fixed size? (917, y…

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## [Perspective bug in eclipse?](https://discourse.processing.org/t/perspective-bug-in-eclipse/7220)

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**Author:** [@vjjv](https://discourse.processing.org/u/vjjv)\
**Replies:** 3\
**Last updated:** [January 5, 2019, 9:26pm UTC](https://discourse.processing.org/t/perspective-bug-in-eclipse/7220 "2019-01-05T21:26:34Z")

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hello! im trying to do this en eclipse, using perspective to set the nearClip (is there any other way to set the near and far clip without the perspective() function?) in eclipse the function dont work fine, please take …

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## [Screen with two buttons not showing the buttons](https://discourse.processing.org/t/screen-with-two-buttons-not-showing-the-buttons/7230)

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**Author:** [@Banansplitt](https://discourse.processing.org/u/Banansplitt)\
**Replies:** 1\
**Last updated:** [January 5, 2019, 7:46pm UTC](https://discourse.processing.org/t/screen-with-two-buttons-not-showing-the-buttons/7230 "2019-01-05T19:46:18Z")

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I tried making a programme that shows a screen with two buttons but all it shows is a blank screen. This is my code: int rect1X, rect1Y; //Position Button 1 (Option 1) int rect2X, rect2Y; //Position Button 2 (Option 2) …

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## [Processing code to p5.js](https://discourse.processing.org/t/processing-code-to-p5-js/7173)

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**Author:** [@Lillbre](https://discourse.processing.org/u/Lillbre)\
**Replies:** 5\
**Last updated:** [January 5, 2019, 6:14pm UTC](https://discourse.processing.org/t/processing-code-to-p5-js/7173 "2019-01-05T18:14:21Z")

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I wonder how to translate this PImage magnified, normal; to p5.js. My guess is let magnified= new p5.Image(); let normal= new p5.Image(); but that didn’t make it work. I am trying to do make a magnifying glass like…

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## [Catching Balls Game Collision Problem](https://discourse.processing.org/t/catching-balls-game-collision-problem/7221)

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**Author:** [@yamiyugi](https://discourse.processing.org/u/yamiyugi)\
**Replies:** 1\
**Last updated:** [January 5, 2019, 6:06pm UTC](https://discourse.processing.org/t/catching-balls-game-collision-problem/7221 "2019-01-05T18:06:16Z")

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Hello, I’m trying to make a game with a stick figure with a basket that you can move with the right and left arrow key to catch balls falling from the top. So far I have the figure that moves and one ball falling and I …

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## [Processing android problem](https://discourse.processing.org/t/processing-android-problem/7183)

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**Author:** [@SSnake](https://discourse.processing.org/u/SSnake)\
**Replies:** 3\
**Last updated:** [January 5, 2019, 5:59pm UTC](https://discourse.processing.org/t/processing-android-problem/7183 "2019-01-05T17:59:22Z")

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I have written some code on the computer for my phone and I was able to upload it to my phone. My question now is: Is it possible to edit a program that you made on a computer with a phone when you have the app?

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## [Add "Kinect Camera" to processing.video\* Library](https://discourse.processing.org/t/add-kinect-camera-to-processing-video-library/7223)

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**Author:** [@Hassan](https://discourse.processing.org/u/Hassan)\
**Replies:** 0\
**Last updated:** [January 5, 2019, 4:54pm UTC](https://discourse.processing.org/t/add-kinect-camera-to-processing-video-library/7223 "2019-01-05T16:54:00Z")

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Hi, I recently watched a video named “11.1: Capture and Live Video - Processing Tutorial” by Mr. Daniel Shiffman on YouTube. My Problem is How to Add Kinect Camera in Processing for that Video. Mr. Daniel Shiffman says…

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## [Creating a drawing environment in 3D](https://discourse.processing.org/t/creating-a-drawing-environment-in-3d/6952)

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**Author:** [@helplouis](https://discourse.processing.org/u/helplouis)\
**Replies:** 12\
**Last updated:** [January 5, 2019, 3:57pm UTC](https://discourse.processing.org/t/creating-a-drawing-environment-in-3d/6952 "2019-01-05T15:57:13Z")

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Hi! School project and I’m sort of a processing amateur but I get confused with a lot of stuff so I want to create a canvas in 3D that I can draw on, like literally draw continous lines and have other things around tha…

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## [Processing on Debian: library initialization failed](https://discourse.processing.org/t/processing-on-debian-library-initialization-failed/7217)

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**Author:** [@nex](https://discourse.processing.org/u/nex)\
**Replies:** 5\
**Last updated:** [January 5, 2019, 3:48pm UTC](https://discourse.processing.org/t/processing-on-debian-library-initialization-failed/7217 "2019-01-05T15:48:29Z")

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I am having an issue running Processing 3.4 on Debian GNU/Linux sid. Processing would immediately terminate and show the error “library initialization failed - unable to allocate file descriptor table - out of memory”. …

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## [\[Pong Game\] More relistic ball ricochet?](https://discourse.processing.org/t/pong-game-more-relistic-ball-ricochet/7215)

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**Author:** [@Sky](https://discourse.processing.org/u/Sky)\
**Replies:** 1\
**Last updated:** [January 5, 2019, 2:20pm UTC](https://discourse.processing.org/t/pong-game-more-relistic-ball-ricochet/7215 "2019-01-05T14:20:16Z")

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I am going to program a 2pl pong game, and I was wondering if there was a way to make ball ricochet a bit more realistic, because now I use a random num that I add to my Y. (The players will be on the left and right of …

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## [\[CLOSED\] Flashlight permission: appears on APDE, missing on desktop processing](https://discourse.processing.org/t/closed-flashlight-permission-appears-on-apde-missing-on-desktop-processing/7132)

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**Author:** [@JoseMY](https://discourse.processing.org/u/JoseMY)\
**Replies:** 1\
**Last updated:** [January 5, 2019, 12:42pm UTC](https://discourse.processing.org/t/closed-flashlight-permission-appears-on-apde-missing-on-desktop-processing/7132 "2019-01-05T12:42:50Z")

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Hi! android.permission.FLASHLIGHT is missing on the permission list of the desktop version of processing, but it appears in the permission list of APDE. Is it a deprecated permission? Yours, José.

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## [Pixel Processing: Grabbing the Canvas, and Where's the Alpha?](https://discourse.processing.org/t/pixel-processing-grabbing-the-canvas-and-wheres-the-alpha/7162)

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**Author:** [@Aleksi](https://discourse.processing.org/u/Aleksi)\
**Replies:** 14\
**Last updated:** [January 5, 2019, 12:03pm UTC](https://discourse.processing.org/t/pixel-processing-grabbing-the-canvas-and-wheres-the-alpha/7162 "2019-01-05T12:03:19Z")

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Hello again. I’d like to be able to grab a small area from the canvas and process the pixels in such a way that I can alter the color of intersecting lines. Here’s an example of what I’m trying to accomplish. void setu…

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## [Serialization and deserialization](https://discourse.processing.org/t/serialization-and-deserialization/6906)

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**Author:** [@MoonMoon](https://discourse.processing.org/u/MoonMoon)\
**Replies:** 22\
**Last updated:** [January 5, 2019, 11:57am UTC](https://discourse.processing.org/t/serialization-and-deserialization/6906 "2019-01-05T11:57:52Z")

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Hi! I’m new to processing, so please be patient and gentle :wink: I’ve installed the latest version (3.4) and I’m running Windows 10(x64) I’m quite advanced in programming Arduino Microcontroller and usually I use a co…

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## [Basic calculator code error: "it looks like you are mixing active and static modes"](https://discourse.processing.org/t/basic-calculator-code-error-it-looks-like-you-are-mixing-active-and-static-modes/7194)

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**Author:** [@bossofeng](https://discourse.processing.org/u/bossofeng)\
**Replies:** 13\
**Last updated:** [January 5, 2019, 7:15am UTC](https://discourse.processing.org/t/basic-calculator-code-error-it-looks-like-you-are-mixing-active-and-static-modes/7194 "2019-01-05T07:15:32Z")

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I have a error it looks like you are mixing active and static modes can you help me My code: String input = ""; float input1 = 0; float input2 = 0; float result = 0; int operator = 0; boolean drawResult = false; vo…

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## [Unable to figure out how to make these objects go in the opposite direction](https://discourse.processing.org/t/unable-to-figure-out-how-to-make-these-objects-go-in-the-opposite-direction/7155)

<div class="topic-metadata">

**Author:** [@francium401](https://discourse.processing.org/u/francium401)\
**Replies:** 3\
**Last updated:** [January 5, 2019, 6:44am UTC](https://discourse.processing.org/t/unable-to-figure-out-how-to-make-these-objects-go-in-the-opposite-direction/7155 "2019-01-05T06:44:04Z")

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I want to make these circles go in the opposite direction (right to left, instead of left to right), but I can’t seem to figure out how. I managed to get them moving right to left by changing the speed value to a negati…

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## [Lost My File on My Processing](https://discourse.processing.org/t/lost-my-file-on-my-processing/7182)

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**Author:** [@Xaynerd](https://discourse.processing.org/u/Xaynerd)\
**Replies:** 1\
**Last updated:** [January 5, 2019, 1:00am UTC](https://discourse.processing.org/t/lost-my-file-on-my-processing/7182 "2019-01-05T01:00:05Z")

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I lost all of the things I had programmed on to one of my files after an update that I never installed. I was wondering of any good way of recovering the file.

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## [Basic calculator for android](https://discourse.processing.org/t/basic-calculator-for-android/7172)

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**Author:** [@bossofeng](https://discourse.processing.org/u/bossofeng)\
**Replies:** 5\
**Last updated:** [January 4, 2019, 10:53pm UTC](https://discourse.processing.org/t/basic-calculator-for-android/7172 "2019-01-04T22:53:03Z")

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I have a basic problem i write a basic calculator it works but i pressed then equal symbol if i press a new number first answer stay there and new answer write up last answer my english not very well so i will upload a p…

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## [\[SOLVED\] Undefined Error](https://discourse.processing.org/t/solved-undefined-error/7176)

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**Author:** [@Quillbert1](https://discourse.processing.org/u/Quillbert1)\
**Replies:** 4\
**Last updated:** [January 4, 2019, 7:09pm UTC](https://discourse.processing.org/t/solved-undefined-error/7176 "2019-01-04T19:09:39Z")

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I am having an issue with some code. Whenever I run it, i get an error saying Population is undefined in setup. The code is at the github link below.

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## [Need help regarding UV mapping of Octahedron](https://discourse.processing.org/t/need-help-regarding-uv-mapping-of-octahedron/7114)

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**Author:** [@Sudev](https://discourse.processing.org/u/Sudev)\
**Replies:** 4\
**Last updated:** [January 4, 2019, 4:53pm UTC](https://discourse.processing.org/t/need-help-regarding-uv-mapping-of-octahedron/7114 "2019-01-04T16:53:41Z")

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I need some help with UV mapping an octahedron. Here’s my code : let w = 0; let h = 0; let th = 400; beginShape(); vertex(w - side, h - side, 0, 0, 1); vertex(w + side, h - side, 0, 0, 0); vertex(w, …

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## [Processing wont start](https://discourse.processing.org/t/processing-wont-start/2193)

<div class="topic-metadata">

**Author:** [@matess7](https://discourse.processing.org/u/matess7)\
**Replies:** 7\
**Last updated:** [January 4, 2019, 2:38pm UTC](https://discourse.processing.org/t/processing-wont-start/2193 "2019-01-04T14:38:59Z")

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Hey, i wanted to play around with processing but i cant seem to get it working. These are some things i found out: when i launch processing for the first time it starts up but if i try to run some code it crashes if i …

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