Automatically place guides

[Paranoic]

Hello,

I need to place one simple vertical guide between the highest points of my image but automatically? Is there any trick for that? The size of the image will be always different but it will always have two highest points.

[Tom Winkelmann]

Script idea...

- make a selection of your object

- convert selection to a path

- compare y-values of the anchor points to find top most anchor point (lowest value).

- place vertical guide to x-value of top most anchor point

[Paranoic]

I get it but I have no idea how to make a script. (no experience with java)

[r-bin · Accepted solution]

Not the most accurate way. Often it does not produce what is expected.

More accurate script.
Creates a vertical guide along the top peak.
For operability, it is necessary that the figure is one, surrounded by transparency and has only one highest upper protrusion.

var old_units = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;

var x0 = app.activeDocument.activeLayer.bounds[0].value;
var x1 = app.activeDocument.activeLayer.bounds[2].value;
var y0 = app.activeDocument.activeLayer.bounds[1].value;

var d = new ActionDescriptor();
var r = new ActionReference();
r.putProperty(stringIDToTypeID("channel"), stringIDToTypeID("selection"));
d.putReference(stringIDToTypeID("null"), r);
var r1 = new ActionReference();
r1.putEnumerated(stringIDToTypeID("channel"), stringIDToTypeID("channel"), stringIDToTypeID("transparencyEnum"));
d.putReference(stringIDToTypeID("to"), r1);
executeAction(stringIDToTypeID("set"), d, DialogModes.NO);

app.activeDocument.selection.select([[x0,y0], [x1,y0], [x1,y0+1], [x0,y0+1]], SelectionType.INTERSECT);

app.activeDocument.guides.add(Direction.VERTICAL, (app.activeDocument.selection.bounds[0]+app.activeDocument.selection.bounds[2])/2, SelectionType.INTERSECT);

app.activeDocument.selection.deselect();

app.preferences.rulerUnits = old_units;

[Paranoic]

Oh my. Thats great, it is actually working.  Just one thing, I found out that if there are multiple highest points in the same row, the guide will show itself right in the middle of the first and last one.

Would it be possible to edit that script so it would "subtract one half of the path created by the highest points so the guide moves itself to the first highest point?" - attached pic below, I need to get the guide where the black arrow points.

 

[r-bin]

Pay attention to the third line from the end. This is where the middle of the selection is set (on purpose). Think and change the code yourself.

[Paranoic]

Third line from the end? You mean the word "intersect"? Sorry I just dont know java coding or what kind of words should I replace.

[r-bin]

Well.

Try replace

(app.activeDocument.selection.bounds[0]+app.activeDocument.selection.bounds[2])/2

with

app.activeDocument.selection.bounds[0]

Helped?

P.S.

The accuracy of the guide is still questionable.
Depends on shape and edge blur.

[Paranoic]

You are my hero. Thanks.

[c.pfaffenbichler]

Paranoic, I think it is about time that you familiarise yourself with Photoshop Scripting some more. 

[Paranoic]

I know but I dont have time for such learning. I would rather pay a professional who would made me some individual scripts because there is much more I need 😕

[r-bin]

More accurate script. Use when there is blurred edges.

var old_units = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;

var d = new ActionDescriptor();
var r = new ActionReference();
r.putProperty(stringIDToTypeID("channel"), stringIDToTypeID("selection"));
d.putReference(stringIDToTypeID("null"), r);
var r1 = new ActionReference();
r1.putEnumerated(stringIDToTypeID("channel"), stringIDToTypeID("channel"), stringIDToTypeID("transparencyEnum"));
d.putReference(stringIDToTypeID("to"), r1);
executeAction(stringIDToTypeID("set"), d, DialogModes.NO);

app.activeDocument.quickMaskMode = true;

var d = new ActionDescriptor();
d.putInteger(stringIDToTypeID("level"), 128);
executeAction(stringIDToTypeID("thresholdClassEvent"), d, DialogModes.NO);

app.activeDocument.quickMaskMode = false;

var x0 = app.activeDocument.selection.bounds[0].value;
var x1 = app.activeDocument.selection.bounds[2].value;
var y0 = app.activeDocument.selection.bounds[1].value;

app.activeDocument.selection.select([[x0,y0], [x1,y0], [x1,y0+1], [x0,y0+1]], SelectionType.INTERSECT);

app.activeDocument.guides.add(Direction.VERTICAL, app.activeDocument.selection.bounds[0], SelectionType.INTERSECT);

app.activeDocument.selection.deselect();

app.preferences.rulerUnits = old_units;