scaling re-sizing textures

Tagged: sizing scaling textures

This topic has 27 replies, 5 voices, and was last updated 3 years, 8 months ago by Yuri Kovelenov.

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2020-07-03 at 8:55 pm #29632

swatchyb
Customer

Hi,
I have a configurator working well using and changing/swapping gltf’s and textures from the parent doc as needed. Problem is on the texture side, they are seamless tiles that vary greatly in size and aspect ratio if keeping to a single repeat for a minimal file size (but they are the same dpi). What is the best way to control the scaling so that, for example,the smaller textures aren’t stretched out, and the larger compressed and/ or distored.
The solution likely starts with the material puzzle for the dimensions, and a calculation can be done on the server side, but not sure how to get it back to verge and scale in a manner like you might with the vector mapping node in blender.
Thoughts? and thanks in advance.

(ps could of course already have the scaling values ready (from the server) on selection of a given texture, but still not sure how to affect it in verge).

2020-07-06 at 6:21 am #29694

Mikhail Luzyanin
Staff

You can add a mapping node with a value node this way and change value with Set Value puzzle.

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Co-founder and lead graphics specialist at Soft8Soft.

2020-07-09 at 3:43 am #29859

swatchyb
Customer

for some reason I didn’t see the graph you attached … now I get it and will try it. thanks!

2020-07-09 at 3:51 am #29860

swatchyb
Customer

Can I add a related question?
In Blender with evee, things are quite sharp, but once in verge, the textures blur a lot over distance. not using shadows, and really simple lighting and settings. any thoughts as to how to get less blurry halo?
attached are two snips, one from a blender evee window, and the other from verge in the browser.
thanks again :)

2020-07-09 at 6:09 am #29864

Mikhail Luzyanin
Staff

You need to turn on Anisotropic Filtering in the image settings. You can find the solution in this video.

Co-founder and lead graphics specialist at Soft8Soft.

2020-07-13 at 5:01 am #29998

swatchyb
Customer

Thanks for the tip and video link Mikhail – worked great. think i’ve got the scaling with the value thing figured out too, though not fully implemented.
but thanks in advance. :)

2020-07-13 at 6:20 am #30000

Mikhail Luzyanin
Staff

Co-founder and lead graphics specialist at Soft8Soft.

2020-07-13 at 1:18 pm #30031

swatchyb
Customer

Hi again,
Just noticed that once I have added the nodes you suggested, the exported gltf does not render in ios/ipad. I have shadows disabled, so it’s not that. Any clues as to what needs to be disabled??
Many thanks.

2020-07-13 at 2:27 pm #30033

Mikhail Luzyanin
Staff

can you share some screenshots of the app, better with a console or better just upload your app somewhere and sahre the link.

Co-founder and lead graphics specialist at Soft8Soft.

2020-07-13 at 3:24 pm #30049

swatchyb
Customer

Thanks for the quick reply.
Is there an email address I can share screen shots of app w/console?
thanks again.

2020-07-13 at 4:14 pm #30056

Mikhail Luzyanin
Staff

swatchyb wrote:

Is there an email address I can share screen shots of app w/console?

You can post it here.

Co-founder and lead graphics specialist at Soft8Soft.

2020-07-14 at 3:58 am #30084

swatchyb
Customer

Hi Mikhail,
B2B app won’t work without login, and would take some explaining to get to the verge part. So here is a screneshot of the console, but don’t think there is much to learn there from a windows screen vs ios. In ios, the primary background scene loads, but none of the assets/ other gltf’s. I had this problem once before on the ipad, and it mysteriously went away, but now back :-/

2020-07-14 at 4:10 am #30085

swatchyb
Customer

Also, on the texture scaling question, I have this puzzle that works if I put a constant for the set value to part, or send value from database, but I wanted to derive the width from the external jpg and calculate the scaling factor based on the difference to the original/stock texture as attached. Is this possible, or what am I doing wrong to get the mat1 width and make the calc vs the 512 original.

As well, even with a constant, it works on mat1, but not on 2 or3 etc. The xy “value” can’t be made unique in blender, or verge doesn’t see if I change the title of the value, so do you have a suggestion.

Thanks very much for your kind attention.

2020-07-14 at 6:46 am #30088

Mikhail Luzyanin
Staff

swatchyb wrote:

the primary background scene loads, but none of the assets/ other gltf’s. I had this problem once before on the ipad, and it mysteriously went away, but now back

Unfortunally there’s no image attached, may be you can upload your application to verge3d network and share a link here.

swatchyb wrote:

Also, on the texture scaling question, I have this puzzle that works if I put a constant for the set value to part, or send value from database, but I wanted to derive the width from the external jpg and calculate the scaling factor based on the difference to the original/stock texture as attached. Is this possible, or what am I doing wrong to get the mat1 width and make the calc vs the 512 original.

There’s no way to do this using puzzles I think you need to use JavaScript for thet, but better to post this question separately in Programming forum to get help.

swatchyb wrote:

As well, even with a constant, it works on mat1, but not on 2 or3 etc. The xy “value” can’t be made unique in blender, or verge doesn’t see if I change the title of the value, so do you have a suggestion.

As I undestand right you just need to make all materials unique to set independent x and y scale for them.

Co-founder and lead graphics specialist at Soft8Soft.

2020-07-16 at 3:34 am #30169

swatchyb
Customer

Hi Mikhail,
Regarding the gltf’s not rendering in ios, after hours of hunting, found that one obscure object that repeated in all of my files did not have a normal mapping node, and that alone kept anything in that gltf from rendering in v3d. So problem solved
Thanks.
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