OpenRNDR

OpenRNDR

A Kotlin based framework for Creative Coding

Forum

References

https://api.openrndr.org/ https://github.com/openrndr/orx

Custom Frame Rates

https://openrndr.discourse.group/t/running-a-program-at-a-specific-frame-rate/144

Live programming

https://openrndr.discourse.group/t/improved-live-coding-with-orx-olive/106 Example: https://www.youtube.com/watch?v=qdgnRct0_nw&t=12428s https://guide.openrndr.org/#/10_OPENRNDR_Extras/C03_Live_coding

Extensions

ScreenRecorder / Video

https://openrndr.discourse.group/t/exporting-animated-gifs/134/2

GIFProfile: GIFs (low quality) ProresProfile: mov (high quality) MP4Profile: mp4 (medium quality)

import org.openrndr.application
import org.openrndr.color.ColorRGBa
import org.openrndr.extra.videoprofiles.GIFProfile
import org.openrndr.extra.videoprofiles.ProresProfile
import org.openrndr.ffmpeg.ScreenRecorder

fun main() = application {
    program {
        extend(ScreenRecorder()) {
            profile = GIFProfile()
        }
        extend {
            drawer.clear(ColorRGBa.GREEN)
        }
    }
}

Screenshot

Use the space bar to take a screenshot

import org.openrndr.extensions.Screenshots

...
extend(Screenshots())

NoClear

Don’t clear after every frame (allows for more of a canvas like approach)

To use need to add:

"orx-no-clear",

to the val orxFeatures variable in the build.gradle.kts file

import org.openrndr.extensions.NoClear

...
extend(NoClear())

Command Line Arguments

Use kotlinx.cli to allow for width/height, seed inputs, etc. Build up a standard set for easy re-use

Passing with gradle

./gradlew sketch -Ptitle=R01_CirclesAndTriangles --args="-w 500 -e 500 -s 0"

Shapes

Rectangle

Can build from the center using Rectangle.fromCenter(Vector2, radius)

Tags: #tools

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