Convert p5.js to Processing

codingking03 · June 14, 2018, 2:58am

Is there any easy way to convert p5.js code to processing (java)?

GoToLoop · June 14, 2018, 4:45am

codingking03 · June 14, 2018, 4:49am

Ok it looks like I need to know some of both languages to work efficiently between the two

GoToLoop · June 14, 2018, 4:54am

JavaScript is Java on the web. It means both languages got a lot in common!
Even though you wanna go back to “offline” Java, it shouldn’t be that difficult at all:

https://Github.com/processing/p5.js/wiki/Processing-transition

Just take a look at my Reddit post and compare how the same sketches are written in Java & JS syntaxes.

codingking03 · June 14, 2018, 7:27am

I have found that this is true! But I have - as it is very easy to - gotten used to the whole var/auto data type

theslyprofessor · July 18, 2020, 8:43pm

JavaScript and Java are actually completely different languages. The name JavaScript was chosen to ride the coattails of Java’s success.

istinn · September 14, 2022, 2:10pm

Do you know any additional guide/tutorials other than the Processing-transition wiki page? It seems there are several tools at GitHub to experiment automated conversion on java-processing to p5.js code but not the opposite.
Do you know by chance any sketch examples exposing both language code, in order to study/compare the differences?

GoToLoop · September 14, 2022, 3:18pm

Haven’t you taken a look at my Reddit link from my 1st reply for this topic btW?

Anyways, I’ve got quite some more Java + p5js sketches for you to compare both syntax flavors:

gist.github.com

https://gist.github.com/GoSubRoutine/da4939559d8b786df13f5694ea2edd30

.block

height: 600
scrolling: no
border: yes
license: cc-by-4.0

calc.mjs

const ERRORS = [
  "Polygon's newSize parameter can't be less than 2!",
  "Parameter dots[] must contain at least 2 { x, y } objects!",
  "Parameter epsilon can't be a negative value!"
];

export default function reducePolygon(dots, newSize, debug=true) {
  if (newSize < 2)  throw RangeError(ERRORS[0]);

  let reduced, ep = 0;

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data.mjs

export default function mapXYTableToXYArray(t, asVectors=false) {
  return t.getArray().map(asVectors && xyArrToVecMap || xyArrToXYObjMap);
}

function xyArrToVecMap([ x, y ]) {
  return p5.instance && createVector(+x, +y) || new p5.Vector(+x, +y);
}

function xyArrToXYObjMap([ x, y ]) {
  return { x: +x, y: +y };

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There are more than three files. show original

istinn · September 14, 2022, 3:38pm

wow… it seems I have missed this obvious post… But It is nice to see those examples as headlines here. Very Hard to miss them now… thanks!

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