If we don’t use scaling, it works well but there… it doesn’t work at all… and I really don’t find why. If you know it… thank you VERY much in advance !!! The sketch is here ! Otherwise, Openprocessing indicates an error that I don’t have at all on my computer when I run this sketch! N.B. same …

Hi! I think I can see two problems in runOutMatrix: I think you aren’t accumulating the parent’s position, only its scale. The child’s total position should be createVector(parentX + parentScale * childX, parentY + parentScale + childY), as the parent’s scale also applies to the position relative …

Also one thing that might be of interest is the DOMMatrixReadOnly JavaScript class: DOMMatrixReadOnly It lets you keep track of a transform with multiple nested translations and scales and will also let you extend your code to include rotations too if you need. It would let you do something like th…

THANK you beaucoup… (a lot) :upside_down_face: It looks super interesting !!! Yes indeed, taking care of the rotation is my next goal :hatching_chick: ! I will watch this very closely as soon as possible (I can’t wait!)… I have to take care of something else by Saturday evening - Sunday! …

Hello @EricRogerGarcia , I did some more digging: Converting webgl 3d coordinates to 2d screen coordinates (p5.js) - Processing 2.x and 3.x Forum Add screenX, screenY and screenZ · Issue #1553 · processing/p5.js · GitHub That is just scratching the surface! There may be something in there that ca…

Related: [image] Relative and global coordinates Processing see also screenX screenY equivalent in p5.js - #5 by bohnacker

There, it works! (I didn’t have much time….) (In Processing because I prefer Java for thinking!) I will take care of the rotation issue now. N.B. I absolutely need to solve this because the upcoming collision management will have to be done outside of the transformations applied to the objects f…

et voilà !!! [transforms-java] Thing things; void setup() { size(1000, 600); things=new Thing(width/2, height/2, 40, 40, 0.6, 2) .setRotationVelocity(0.01); for (int i=0; i<10; i++) { Thing newThing=new Thing(random(width)-width/2, random(height)-height/2, 40, 40, random(0, 2), r…

Relatives and global positioning

Processing Coding Questions

glv September 9, 2025, 3:46pm 6

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Relatives and global positioning

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