# OPENRNDR **URL:** https://openrndr.discourse.group/c/openrndr/5.md?page=5 [Latest](https://openrndr.discourse.group/latest.md) · [Categories](https://openrndr.discourse.group/categories.md) **Page:** 6 --- ## [Synthesis Library for OPENRNDR](https://openrndr.discourse.group/t/synthesis-library-for-openrndr/293)
**Author:** [@woodwindblues](https://openrndr.discourse.group/u/woodwindblues)\ **Replies:** 3\ **Last updated:** [April 20, 2022, 3:39pm UTC](https://openrndr.discourse.group/t/synthesis-library-for-openrndr/293 "2022-04-20T15:39:47Z")
Hello, can anyone recommend a audio synthesis library for OpenRNDR? I am programming audio-installations with visuals where a lot of data is exchanged between audio and video. --- ## [Efficient playback of video](https://openrndr.discourse.group/t/efficient-playback-of-video/364)
**Author:** [@capital-G](https://openrndr.discourse.group/u/capital-G)\ **Replies:** 6\ **Last updated:** [April 19, 2022, 6:30am UTC](https://openrndr.discourse.group/t/efficient-playback-of-video/364 "2022-04-19T06:30:44Z")
Hi, I currently try to understand how one can efficiently play multiple videos at the same time and also how to seek in them and modulate the playback speed. A naive approach was import org.openrndr.application import… --- ## [Struggling to run openrndr-template on Ubuntu via ssh](https://openrndr.discourse.group/t/struggling-to-run-openrndr-template-on-ubuntu-via-ssh/358)
**Author:** [@sourmike](https://openrndr.discourse.group/u/sourmike)\ **Replies:** 10\ **Last updated:** [April 8, 2022, 7:20am UTC](https://openrndr.discourse.group/t/struggling-to-run-openrndr-template-on-ubuntu-via-ssh/358 "2022-04-08T07:20:57Z")
I’m trying to clone an openrndr-template project onto an ubuntu (20.04) machine. I’m trying to run the program directly without having to open the Intellij IDEA. I’m able to run some gradle commands but when I attempt to… --- ## [Is there a way to batch draw these rectangles?](https://openrndr.discourse.group/t/is-there-a-way-to-batch-draw-these-rectangles/356)
**Author:** [@sourmike](https://openrndr.discourse.group/u/sourmike)\ **Replies:** 4\ **Last updated:** [April 2, 2022, 5:44pm UTC](https://openrndr.discourse.group/t/is-there-a-way-to-batch-draw-these-rectangles/356 "2022-04-02T17:44:58Z")
Hello again, Since my last post I have found a way of making a rotating crystal thing that I like as you can see here: My problem now is that it is a relatively more demanding program to run with all the rectangles b… --- ## [Why is this simple (I think?) program flickering?](https://openrndr.discourse.group/t/why-is-this-simple-i-think-program-flickering/352)
**Author:** [@sourmike](https://openrndr.discourse.group/u/sourmike)\ **Replies:** 4\ **Last updated:** [March 17, 2022, 9:41am UTC](https://openrndr.discourse.group/t/why-is-this-simple-i-think-program-flickering/352 "2022-03-17T09:41:28Z")
Hey everyone, first-time poster here :nerd\_face: I just started working with OPENRNDR. I have this rotating plumbob/gem program I’m working on, and since I added in some triangles via the contour tool, they always flic… --- ## [Can you make pictures ("headless" apps) on Windows with OPENRNDR?](https://openrndr.discourse.group/t/can-you-make-pictures-headless-apps-on-windows-with-openrndr/315)
**Author:** [@asf8p9yasdloiughrlkb](https://openrndr.discourse.group/u/asf8p9yasdloiughrlkb)\ **Replies:** 3\ **Last updated:** [March 14, 2022, 7:11am UTC](https://openrndr.discourse.group/t/can-you-make-pictures-headless-apps-on-windows-with-openrndr/315 "2022-03-14T07:11:12Z")
Hi, I want to move away from p5.js and Paper.js because they are too slow, and just discovered OpenRNDR. It seems like it is fast, like Processing, with powerful geometric maths available, like Paper.js. But I don’t car… --- ## [Help with starting out with OPENRNDR](https://openrndr.discourse.group/t/help-with-starting-out-with-openrndr/347)
**Author:** [@Nigel](https://openrndr.discourse.group/u/Nigel)\ **Replies:** 3\ **Last updated:** [March 7, 2022, 10:04am UTC](https://openrndr.discourse.group/t/help-with-starting-out-with-openrndr/347 "2022-03-07T10:04:35Z")
Hello fellow artists! Are there any guides, tutorials I should start with in order to learn visual programming with OPENRNDR? I’ve read the docs and played around for a week with my own programs but I feel like there’s … --- ## [OPENRNDR / Shaders crashing due to computer memory filling up](https://openrndr.discourse.group/t/openrndr-shaders-crashing-due-to-computer-memory-filling-up/342)
**Author:** [@ehr](https://openrndr.discourse.group/u/ehr)\ **Replies:** 3\ **Last updated:** [February 21, 2022, 10:12am UTC](https://openrndr.discourse.group/t/openrndr-shaders-crashing-due-to-computer-memory-filling-up/342 "2022-02-21T10:12:22Z")
i know this is the second time now i’m making a post with a similar title but the solution isn’t the same i promise So, I’ve made a small program that takes the camera input, saves the current and the previous frame in … --- ## [Does openrndr use opengl under the hood?](https://openrndr.discourse.group/t/does-openrndr-use-opengl-under-the-hood/338)
**Author:** [@JochemP](https://openrndr.discourse.group/u/JochemP)\ **Replies:** 1\ **Last updated:** [February 11, 2022, 10:02pm UTC](https://openrndr.discourse.group/t/does-openrndr-use-opengl-under-the-hood/338 "2022-02-11T22:02:03Z")
I just started learning about graphics programming so i was wondering. Does openrndr use opengl under the hood? --- ## [OPENRNDR filling up computer memory and crashing | Making a variable-width line](https://openrndr.discourse.group/t/openrndr-filling-up-computer-memory-and-crashing-making-a-variable-width-line/327)
**Author:** [@ehr](https://openrndr.discourse.group/u/ehr)\ **Replies:** 7\ **Last updated:** [February 6, 2022, 7:02pm UTC](https://openrndr.discourse.group/t/openrndr-filling-up-computer-memory-and-crashing-making-a-variable-width-line/327 "2022-02-06T19:02:51Z")
I am trying to draw a variable width line by using an array of circles that I add circles with different radi to. Every frame (inside the extend block) the sketch processes 50 new circles and adds them to a MutableList … --- ## [Drawing per-vertex colored meshes and variable thickness lines](https://openrndr.discourse.group/t/drawing-per-vertex-colored-meshes-and-variable-thickness-lines/266)
**Author:** [@abe](https://openrndr.discourse.group/u/abe)\ **Replies:** 2\ **Last updated:** [January 29, 2022, 8:15pm UTC](https://openrndr.discourse.group/t/drawing-per-vertex-colored-meshes-and-variable-thickness-lines/266 "2022-01-29T20:15:27Z")
I just wrote a simple program drawing 300 triangles with unique colors in each vertex, the shader doing color interpolation. I like gradients :slight\_smile: importsimport aBeLibs.geometry.randomPoint import org.openrndr… --- ## [Trouble with trying to align text](https://openrndr.discourse.group/t/trouble-with-trying-to-align-text/320)
**Author:** [@JochemP](https://openrndr.discourse.group/u/JochemP)\ **Replies:** 2\ **Last updated:** [January 13, 2022, 6:43pm UTC](https://openrndr.discourse.group/t/trouble-with-trying-to-align-text/320 "2022-01-13T18:43:56Z")
Im new to openrndr. Im trying to align text to center. I found this openrndr-demos-span-2018/Text.kt at master · openrndr/openrndr-demos-span-2018 · GitHub but i dont know how to get this into a project. i tried creating… --- ## [Changing font-size on the go](https://openrndr.discourse.group/t/changing-font-size-on-the-go/318)
**Author:** [@fazwi](https://openrndr.discourse.group/u/fazwi)\ **Replies:** 3\ **Last updated:** [January 11, 2022, 9:08am UTC](https://openrndr.discourse.group/t/changing-font-size-on-the-go/318 "2022-01-11T09:08:18Z")
Hello, I’m having a small issue. I’m trying to do a quick countdown with number showing on the screen and increasing size before disappearing. The issue I have is that, since FontImageMap.size is a val I can’t find a w… --- ## [OPENRNDR online meetup 2021](https://openrndr.discourse.group/t/openrndr-online-meetup-2021/310)
**Author:** [@abe](https://openrndr.discourse.group/u/abe)\ **Replies:** 1\ **Last updated:** [December 18, 2021, 6:22pm UTC](https://openrndr.discourse.group/t/openrndr-online-meetup-2021/310 "2021-12-18T18:22:36Z")
Dear friends, Today Sunday December 19th at 19:00 CET we will have an online call to talk about our favorite creative coding framework! :slight\_smile: Anyone curious about OPENRNDR is welcome. There’s no specific ag… --- ## [Can't get ORML to work](https://openrndr.discourse.group/t/cant-get-orml-to-work/306)
**Author:** [@vanity\_ibex](https://openrndr.discourse.group/u/vanity_ibex)\ **Replies:** 7\ **Last updated:** [December 14, 2021, 9:45am UTC](https://openrndr.discourse.group/t/cant-get-orml-to-work/306 "2021-12-14T09:45:33Z")
Hi, First of sorry if this is some basic problem that should be fairly trivial. Im new to OPENRDR and Kotlin and have reached a point where google wont help me anymore. I’ve cloned the openrndr-template and gone throu… --- ## [Spout for OPENRNDR](https://openrndr.discourse.group/t/spout-for-openrndr/303)
**Author:** [@60pfennig](https://openrndr.discourse.group/u/60pfennig)\ **Replies:** 4\ **Last updated:** [November 29, 2021, 11:09am UTC](https://openrndr.discourse.group/t/spout-for-openrndr/303 "2021-11-29T11:09:07Z")
Hi I took the Spout JNI and the library from Spout for Processing and made it work with OPENRNDR. Spout is a tool that lets you easily transmit images/video to other applications. I tested it just a few times and there… --- ## [Arduino / Firmata](https://openrndr.discourse.group/t/arduino-firmata/289)
**Author:** [@torb](https://openrndr.discourse.group/u/torb)\ **Replies:** 2\ **Last updated:** [October 27, 2021, 6:06pm UTC](https://openrndr.discourse.group/t/arduino-firmata/289 "2021-10-27T18:06:21Z")
I was curious about how you control Arduino (running Firmata) from OPENRNDR. I searched and all I found was that itwas supported and references to OPENRNDR being successfully used with Arduino. I didn’t find any concrete… --- ## [OPENRNDR & Processing - Word frequencies](https://openrndr.discourse.group/t/openrndr-processing-word-frequencies/286)
**Author:** [@abe](https://openrndr.discourse.group/u/abe)\ **Replies:** 0\ **Last updated:** [October 20, 2021, 6:39pm UTC](https://openrndr.discourse.group/t/openrndr-processing-word-frequencies/286 "2021-10-20T18:39:09Z")
Word frequencies and using collections Hi! :slight\_smile: I found one of the examples of Processing which analyzes two books (Dracula and Frankenstein), gets the word frequencies, then draws the words moving at different… --- ## [Compositor lowers the resolution of the output](https://openrndr.discourse.group/t/compositor-lowers-the-resolution-of-the-output/259)
**Author:** [@marcoshier](https://openrndr.discourse.group/u/marcoshier)\ **Replies:** 2\ **Last updated:** [October 6, 2021, 2:53pm UTC](https://openrndr.discourse.group/t/compositor-lowers-the-resolution-of-the-output/259 "2021-10-06T14:53:29Z")
Hi! I am kind of new with openRNDR and I am experimenting with the compositor in olive. In the following code I have a bunch of lines being animated and then perturbed. When not in the compositor (nocomposite.kt), the… --- ## [October 2021 OPENRNDR news](https://openrndr.discourse.group/t/october-2021-openrndr-news/280)
**Author:** [@abe](https://openrndr.discourse.group/u/abe)\ **Replies:** 0\ **Last updated:** [October 6, 2021, 10:55am UTC](https://openrndr.discourse.group/t/october-2021-openrndr-news/280 "2021-10-06T10:55:03Z")
Hi! Even if this forum is not always super busy it doesn’t mean things aren’t moving in the OPENRNDR world :slight\_smile: Most of the activity happens in Slack and GitHub so I thought it might be good to leave a more pub… --- ## [OPENRNDR Particles](https://openrndr.discourse.group/t/openrndr-particles/278)
**Author:** [@timesareweird](https://openrndr.discourse.group/u/timesareweird)\ **Replies:** 3\ **Last updated:** [October 4, 2021, 6:34pm UTC](https://openrndr.discourse.group/t/openrndr-particles/278 "2021-10-04T18:34:40Z")
Looking for some help on this OPENRNDR sketch. Ported over a basic Particle System from Processing, but the speed is much slower. Maybe it is that I am new to Kotlin, but is this structured in the right way. I know about… --- ## [Error while building](https://openrndr.discourse.group/t/error-while-building/256)
**Author:** [@nourako](https://openrndr.discourse.group/u/nourako)\ **Replies:** 4\ **Last updated:** [June 6, 2021, 1:41pm UTC](https://openrndr.discourse.group/t/error-while-building/256 "2021-06-06T13:41:35Z")
I am using the latest IntelliJ and jdk-16.0.1 but i get the following error LF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”. SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http… --- ## [Extension to Ctrl+C what you see, then paste (online?)](https://openrndr.discourse.group/t/extension-to-ctrl-c-what-you-see-then-paste-online/251)
**Author:** [@abe](https://openrndr.discourse.group/u/abe)\ **Replies:** 2\ **Last updated:** [June 4, 2021, 8:58pm UTC](https://openrndr.discourse.group/t/extension-to-ctrl-c-what-you-see-then-paste-online/251 "2021-06-04T20:58:23Z")
Hi, I thought it might be cool to be able to hit a keyboard shortcut to copy whatever your program is drawing and then paste it online somewhere. The usual approach is tedious: save a screenshot, go to the website where … --- ## [How to write index buffer?](https://openrndr.discourse.group/t/how-to-write-index-buffer/249)
**Author:** [@TSAO](https://openrndr.discourse.group/u/TSAO)\ **Replies:** 8\ **Last updated:** [May 29, 2021, 1:45pm UTC](https://openrndr.discourse.group/t/how-to-write-index-buffer/249 "2021-05-29T13:45:21Z")
Hello! I’ve been playing with VertexBuffer a lot recently and notice that the guide does not include how to use it with index buffers. Looking at the API, it shows that the Drawer method for drawing vertexBuffers has an… --- ## [Div on right of screen with orx-panel](https://openrndr.discourse.group/t/div-on-right-of-screen-with-orx-panel/247)
**Author:** [@Ouroboros](https://openrndr.discourse.group/u/Ouroboros)\ **Replies:** 2\ **Last updated:** [May 19, 2021, 8:41am UTC](https://openrndr.discourse.group/t/div-on-right-of-screen-with-orx-panel/247 "2021-05-19T08:41:49Z")
After much fiddling with an olive-program and a dive stylesheet, I cannot find any way to have a div occupy the right side of the screen, taking up a fixed percentage width. Sorry if this is a pretty basic question. I h… --- ## [Tutorial on using Phidgets for sensors/actuators++](https://openrndr.discourse.group/t/tutorial-on-using-phidgets-for-sensors-actuators/245)
**Author:** [@torb](https://openrndr.discourse.group/u/torb)\ **Replies:** 2\ **Last updated:** [May 13, 2021, 8:54pm UTC](https://openrndr.discourse.group/t/tutorial-on-using-phidgets-for-sensors-actuators/245 "2021-05-13T20:54:40Z")
GitHub link to code for those who just want to see that. When making interactive installations getting hardware input from things like potentiometers, various sensors (like light or temperature) or outputting to somethi… --- ## [OPENRNDR and JavaFX/TornadoFX](https://openrndr.discourse.group/t/openrndr-and-javafx-tornadofx/237)
**Author:** [@telioc](https://openrndr.discourse.group/u/telioc)\ **Replies:** 4\ **Last updated:** [May 7, 2021, 4:59pm UTC](https://openrndr.discourse.group/t/openrndr-and-javafx-tornadofx/237 "2021-05-07T16:59:29Z")
I’ve just started using OPENRNDR and I’m enjoying it, but I have a large body of kotlin code with a UI written in TornadoFX (a kotlin JavaFX wrapper). Does anyone know if it’s possible to launch an OPENRNDR app window f… --- ## [In a Reddit near you](https://openrndr.discourse.group/t/in-a-reddit-near-you/235)
**Author:** [@abe](https://openrndr.discourse.group/u/abe)\ **Replies:** 2\ **Last updated:** [April 25, 2021, 5:17pm UTC](https://openrndr.discourse.group/t/in-a-reddit-near-you/235 "2021-04-25T17:17:57Z")
I just discovered there’s a Reddit channel: https://www.reddit.com/r/OPENRNDR/ It’s not very busy yet although there’s a new video uploaded yesterday: --- ## [OPENRNDR and sound (Minim, Beads and TarsosDSP libraries)](https://openrndr.discourse.group/t/openrndr-and-sound-minim-beads-and-tarsosdsp-libraries/35)
**Author:** [@kazik](https://openrndr.discourse.group/u/kazik)\ **Replies:** 6\ **Last updated:** [April 24, 2021, 1:17pm UTC](https://openrndr.discourse.group/t/openrndr-and-sound-minim-beads-and-tarsosdsp-libraries/35 "2021-04-24T13:17:22Z")
It won’t be a question, at least not asked by me. My friend asked me during the OPENRNDR workshop how to use sound with OPENRNDR. and then she immediately googled it. There was no answer over the Internet. So I will writ… --- ## [Accessing the Backbuffer](https://openrndr.discourse.group/t/accessing-the-backbuffer/234)
**Author:** [@templodespejos](https://openrndr.discourse.group/u/templodespejos)\ **Replies:** 2\ **Last updated:** [April 24, 2021, 8:55am UTC](https://openrndr.discourse.group/t/accessing-the-backbuffer/234 "2021-04-24T08:55:13Z")
TL;DR: Is something similar to Processing’s load/updatePixels functionality without a structure that requires declaring the default display as PImage/PGraphics available in OPENRNDR? I wonder this in part because of the… [Previous page](https://openrndr.discourse.group/c/openrndr/5.md?page=4) [Next page](https://openrndr.discourse.group/c/openrndr/5.md?page=6)