Confused about how coordinates work in scripts

It seems if a script changes the artboard, the origin doesn't move, but if you manually resize the artboard, the origin moves with it... is that correct?

Salut!
Une méthode à l'ancienne pour ne pas se préoccuper de la position de l'origine.

Il suffit de faire un choix au départ du script? (se référer au bas ou au haut du plan de travail)

Mais depuis il y a d'autre méthode mais celle ci peut aider à comprendre...

// elleere Wed, 24 June 2020 08:11:52 GMT
// Traitement dans le plans de travail actif
// orignine fictive en haut à gauche avec rulerOrigin
var docRef = app.activeDocument;
var Origin = docRef.rulerOrigin;
var hauteur = docRef.height;
var origX = -Origin[0];
var origY = -Origin[1]+hauteur;

var top = origY-50, left = origX+50, width = 60, height = 40;
docRef.pathItems.rectangle(top, left, width, height);
// orignine fictive en bas à gauche avec rulerOrigin
    origX = -Origin[0];
    origY = -Origin[1];

    var  height = 40, top = origY+50+height, left = origX+50, width = 60;
docRef.pathItems.rectangle(top, left, width, height);

de elleere

Salut!
Une méthode à l'ancienne pour ne pas se préoccuper de la position de l'origine globale.

Il suffit de faire un choix au départ du script? (se référer au bas ou au haut du plan de travail)

Mais depuis il y a d'autres méthodes mais celle ci peut aider à comprendre...

// elleere Wed, 24 June 2020 08:11:52 GMT
// Traitement dans le plan de travail actif
// orignine fictive en haut à gauche avec rulerOrigin
var docRef = app.activeDocument;
var Origin = docRef.rulerOrigin;
var hauteur = docRef.height;
var origX = -Origin[0];
var origY = -Origin[1]+hauteur;

var top = origY-50, left = origX+50, width = 60, height = 40;
docRef.pathItems.rectangle(top, left, width, height);
// orignine fictive en bas à gauche avec rulerOrigin
    var origX = -Origin[0];
    var origY = -Origin[1];
var  height = 40, top = origY+50+height, left = origX+50, width = 60;
docRef.pathItems.rectangle(top, left, width, height);

de elleere

it is [left, top, right, bottom]

Okay does the artboard rect work the same as making a rectangle?  It's y, x, width, height?

as if things weren't confusing enough, here's the kicker. If your script creates the document the origin is bottom/left. If your script references an already open document, the origin is top/left.

that might seem absolutely crazy, but it kinds of make sense. Adobe changed the origin from bottom/left to top/left in CS5. So in order to not break existing scripts, origin had to remain as it was (as in CS4) when the script creates documents, but accessing existing documents had to align with the new and shining Cartesian system (CS5).

The coordinates in Illustrator are a bit confusing (confused?). In artboard coordinates, the 0,0 point is top left of artboard.

Try this:

var top = 10, left = 20, width = 30, height = 40;
app.activeDocument.pathItems.rectangle(-top, left, width, height);

Notice the minus sign before 'top'? This is because the illustrator Y axis starts at 0 at the top of artboard, and goes down. So -10 means 10 down from the top of the artboard.

FYI, I mentioned artboard coordinates earlier. This means that values are relative to the active artboard. So when drawing with a script, the artboard matters. If that's a problem for your script, look into document coordinates.

Regards,

Mark