Resizing an Image by selection size

[Revnart]

Hello I just wanted to ask if this is possible to do:

I have an image opened and create selection (for example marquee)
Now run the script which:
Record that selection is 14cm wide (lets assume that all images I use are 72PPI)
ask user to input value, for example 173cm
then it calculates 173/14 = 12,35
and change image size by 1235% (which comes from previous calculation)

What can be done, what can't? what are limitations in such example?

Thank you for your help

[Kukurykus]

Code: Select all

$.level = 0, preferences.rulerUnits = Units.CM

try {

	(bnd = (aD = activeDocument).selection.bounds)[2] - bnd[0], v = prompt('Enter the value:', '');

	(/^\d*$/).test(v) ? (f  = v / 14, aD.resizeImage(aD.width * f, aD.height * f)) : alert('That wasn\'t number!')

}

catch (errSel) {alert('Make selection to preceed...')}

[Revnart]

It works great, fast and exactly as I described thank you

Code: Select all

f  = v / 14

What should I put instead of "14" which is static value, to divide not by 14 but by current selection width?

EDIT:
Ok I made it

Code: Select all

$.level = 0, preferences.rulerUnits = Units.CM

try {

   as = (bnd = (aD = activeDocument).selection.bounds)[2] - bnd[0];

   v = prompt('Docelowa szerokość:', '');

   (/^\d*$/).test(v) ? (f  = v / as, aD.resizeImage(aD.width * f, aD.height * f)) : alert('Podawaj tylko liczby.')

}

catch (errSel) {alert('Najpierw zaznacz element')}

this will now work with value from selection width Once again thank you for your help

[Kukurykus]

Yes I was too fast writing that code, so I forgot to change 14 to proper selection in document. But I did another mistake! I didn't add '.value' part at end of selection width. Use corrected code once again to get proper result this time:

Code: Select all

$.level = 0, preferences.rulerUnits = Units.CM

try {

	if ((/^\d*$/).test(v = prompt('Enter the value:', ''))) {

		f = v / ((bnd = (aD = activeDocument).selection.bounds)[2] - bnd[0]).value

		aD.resizeImage(aD.width * f, aD.height * f)

	}

	else alert('That wasn\'t number!') 

}

catch (errSel) {alert('Make selection to preceed...')}

[Revnart]

Thank you Works great