Small line between rectangles

[Lukas.]

Hi everyone,

while working on some simple design with rectangles I noticed this small line in between the rectangles. Why are the rectangles not rendered as one big rectangle?

Further details:

- Stroke is set to "None"

- The rectangles are pixel perfect aligned on top of each other

- The fact that they are visually but not technically separated also appears when exporting to a SVG and making a PNG out of it

 

Greetings,

Lukas

[v_kyr]

Hi, see the related:

• Remove thin line when snaping

 

[Lukas.]

I am using integer values for the positions but when I export to SVG and then import the SVG into a normal document (so it will be rendered) there is still said gap between them.

rectangles.svg

rectangles.afdesign

[Dan C]

Hi Lukas,

Welcome to the forums

25 minutes ago, Lukas. said:

and then import the SVG into a normal document (so it will be rendered) there is still said gap between them.

Are you referring to placing the file in another Affinity Designer document? I've opened both your .afdesign and svg file and at 100% zoom level there's no white line shown so I'm a little unsure what you mean by this!

[Lukas.]

Hi Dan,

thanks for helping out!

I opened Affinity Photo, created a new document and then dragged the SVG inside. That will result in the PNG from my last post.

[Dan C]

No problem at all, I've tried following this workflow using your provided file and at 100% zoom level in Affinity Photo I can see a very faint white line, however I exported the file as a JPEG and the line is not visible. I believe this is a rendering choice with embedded documents, but this shouldn't show on export  

[Lukas.]

Those are my results (attachments). I mean it's not a big problem, I can always make it overlap on purpose to ensure correct representation in the final rendering but I'm still wondering about this anyway.
I looked into the encoding of the SVG:

    <g transform="matrix(0.98824,0,0,1.24687,-326.325,-512.304)">
        <rect x="330.208" y="410.872" width="303.57" height="80.201"/>
    </g>
    <g transform="matrix(0.98824,0,0,1.24687,-326.325,-412.304)">
        <rect x="330.208" y="410.872" width="303.57" height="80.201"/>
    </g>

So I'm guessing the Matrix-Transform is not accurate enough on the floating points given in the <rect>. Could that be it?

rectangles.afphoto

[MEB]

The placed/embedded SVG is scaled (up) on your document so it's not aligned with the pixel grid anymore (thus the background bleeding through the common edge of the rectangles). If you resize/place it with the original document dimensions (which were 300x200 or multiples of that value) and with integer X,Y coordinates it should display/render without that gap at 100% view and when exporting. For some weird reason when we edit the embedded document sometimes it still displays the line at 100% zoom. It's probably due to the reason you pointed above on SVG export.

[walt.farrell]

Not sure it's significant, but I opened the .svg file in Firefox, and at 170% or higher zoom there's a white line between the two rectangles.

[v_kyr]

21 minutes ago, walt.farrell said:

Not sure it's significant, but I opened the .svg file in Firefox, and at 170% or higher zoom there's a white line between the two rectangles.

No need to zoom in, just inspect and run the SVG code in some online tool ...

• https://www.w3schools.com/code/tryit.asp?filename=FXQLKR2BFI8D

[v_kyr]

1 hour ago, Lukas. said:

So I'm guessing the Matrix-Transform is not accurate enough on the floating points given in the <rect>. Could that be it?

Yes, if you add/remove (in this case -413.304) just one pixel value for the second rect in it's transform matrix it should look Ok, aka alter the sixth value of the  transformation matrix there ...

<g transform="matrix(0.98824,0,0,1.24687,-326.325,-413.304)">
        <rect x="330.208" y="410.872" width="303.57" height="80.201"/>
</g>

 

[Lukas.]

Thanks for everyone's contribution.

So what's the solution now? I guess I'm not gonna manually manipulate the svg-file after I made an export from Affinity Designer? Is there maybe an option for something like "raw export" or do I just make them overlap now as a hacky workaround?