Converting documents from pixels to mm and scaling objecting using a relative scale

[randomvectorstudio]

I have been using pixels in the document settings so far but have recently got a laser printer and want to take some svg files created with |Affinity to the laser burning software (LightBurn). In this case I would like to have my measurements in mm. The trouble is I was using a base shape with 100 by 100 pixels and deriving various tiling shapes based on that square. But when I convert the doc to use mm as unit, that 100 px translates to 8.5 m. Ideally I would like to have a round number like 10mm. Is there any way I can scale all of my tiles so that they will all scale to a 10x10 mm box?

Thanks!

[thomaso]

15 minutes ago, randomvectorstudio said:

when I convert the doc to use mm as unit, that 100 px translates to 8.5 m.

What document resolution (DPI) do you use? [If it would be only 1 dpi then 100 px result in 2.45 m. I don't see a way to achieve your 8.5 m.]

If you mean 8.5 mm instead then scaling by 10 / 8.5 ≈ 1.17647 would result in the wanted 10 mm. However, note that, regardless of the current document DPI, a px to mm conversion is hardly as smooth as, for example, mm and m, and therefore you may need a scaling value with multiple decimal places and/or rounding and not achieve perfect 10.000 mm. – Alternatively you could set an absolute value (10 mm) instead of scaling with a multiplication (8.5 x ...).

But honestly I might misunderstand your goal, especially the drawing and its red arrows appears unclear to me.

[randomvectorstudio]

5 minutes ago, thomaso said:

What document resolution (DPI) do you use? [If it would be only 1 dpi then 100 px result in 2.45 m. I don't see a way to achieve your 8.5 m.]

If you mean 8.5 mm instead then scaling by 10 / 8.5 ≈ 1.17647 would result in the wanted 10 mm. However, note that, regardless of the current document DPI, a px to mm conversion is hardly as smooth as, for example, mm and m, and therefore you may need a scaling value with multiple decimal places and/or rounding and not achieve perfect 10.000 mm. – Alternatively you could set an absolute value (10 mm) instead of scaling with a multiplication (8.5 x ...).

But honestly I might misunderstand your goal, especially the drawing and its red arrows appears unclear to me.

I meant mm 🙂 Sorry should have explained the red lines a bit better. In my original document those red lines would have been 100 px. So basically when I convert the document to use mm (300 dpi) that measurement becomes around 8.5 mm. So if i have to ask the question in a different way, is it possible to scale all those 8 pointed star shapes and tile shapes derived from those to keep those red lines in the new document to be about 100 mm? Thanks again for ur reply!

[thomaso]

3 minutes ago, randomvectorstudio said:

is it possible to scale all those 8 pointed star shapes and tile shapes derived from those to keep those red lines in the new document to be about 100 mm?

I am still unsure what you want to achieve with the red lines + arrows. If the red lines are a custom Grid then 'simply' change its definition in the Grid Manger as wanted. If they are Guides I doubt their is a simple way and you might need to delete + recreate them.

Regarding the objects: if you want each of them to be 100 mm you could use the new V2 feature to set a certain absolute size (10 mm) for several selected objects via the "Make Same" option in the Alignment dialog. I guess you start the process with a key object that got set to 10 mm already.

 

[Brian_J]

It sounds like you want to resize multiple object relative to the base object; the base object's dimensions are currently 8.5 x 8.5 mm and after resizing you want the base object to be 10 x 10 mm. If my understanding is correct, you could put each set of objects into a Group or Layer, toggle visibility off for all layers accept for the base object, and resize the Group/Layer.

The video below demonstrates it.

 

[firstdefence]

Couldn't use the Transform Objects Separately option on the context menu.

[randomvectorstudio]

20 hours ago, Brian_J said:

It sound like you want to resize multiple object relative to the base object; the base object's dimensions are currently 8.5 x 8.5 mm and after resizing you want the base object to be 10 x 10 mm. If my understanding is correct, you could put each set of objects into a Group or Layer, toggle visibility off for all layers accept for the base object, and resize the Group/Layer.

The video below demonstrates it.

 

 

Yes! That was exactly what I was looking for! Thank you so much for taking your time to explain this with a video. Much appreciated!

[randomvectorstudio]

14 hours ago, firstdefence said:

Couldn't use the Transform Objects Separately option on the context menu.

Ha That method works too! Thank you!

[randomvectorstudio]

Tried both the methods. Results in case anyone finds it useful

1. Method with hiding all except base object and resizing the group/layer works plus all my alignments keeps intact too.

2. Second method, using Transform Objects Separately works too but objects could also get misaligned.

Thanks for the help!

Cheers