vips_similarity syntax error?

[wyatt121]

Hi John,

I'm trying to rotate my design a few degrees before overlaying on my base t-shirt. I can't seem to get the syntax correct for vips_similarity. Are any of these 3 lines correct?

$overlay = Vips\Image::newFromFile($design_image);

$overlay = Vips\Image::vips_similarity($overlay, $overlay, 15);  
$overlay = $overlay->vips_similarity($overlay, 15);   
$overlay = $overlay->vips_similarity(15);   

I keep getting this error:

PHP Fatal error: Uncaught Jcupitt\Vips\Exception: VipsOperation: class "vips_similarity" not found
in /var/www/html/build/vendor/jcupitt/vips/src/Image.php:664

Any help is much appreciated.

Regards,

Wyatt

[jcupitt]

Hello, angle and scale are optional arguments, so you have to name them. For example:

# no scale, only rotate
$overlay = $overlay->vips_similarity($overlay, ["angle" => 15]);

[wyatt121]

Hi John, I tried your line, and I'm still receiving this error. Am I missing the vips_similarity class? Wyatt PHP Fatal error: Uncaught Jcupitt\Vips\Exception: VipsOperation: class "vips_similarity" not found in /var/www/html/build/vendor/jcupitt/vips/src/Image.php:664 Stack trace: #0 /var/www/html/build/vendor/jcupitt/vips/src/Image.php(685): Jcupitt\Vips\Image::errorVips() #1 /var/www/html/build/vendor/jcupitt/vips/src/Image.php(1052): Jcupitt\Vips\Image::errorIsArray(-1) #2 /var/www/html/build/vendor/jcupitt/vips/src/Image.php(1130): Jcupitt\Vips\Image::callBase('vips_similarity', Object(Jcupitt\Vips\Image), Array) #3 /var/www/html/build/testing.php(34): Jcupitt\Vips\Image->__call('vips_similarity', Array) #4 {main} thrown in /var/www/html/build/vendor/jcupitt/vips/src/Image.php on line 664

…

On Mon, Jul 23, 2018 at 1:17 AM, John Cupitt ***@***.***> wrote: Hello, angle and scale are optional arguments, so you have to name them. For example: # no scale, only rotate$overlay = $overlay->vips_similarity($overlay, ["angle" => 15]); — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <https://github.com/jcupitt/libvips/issues/1041#issuecomment-406977455>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AQW5i2GD3KU4GI_2K-3qlV-bsUu7NaDcks5uJYaEgaJpZM4Vah-7> .

[jcupitt]

Sorry, copy/paste error. Try:

# no scale, only rotate
$overlay = $overlay->similarity(["angle" => 15]);

[wyatt121]

Hi John,

This worked great! I'm now able to finely tune the angular rotation of the design placed on each apparel piece so they look 100% natural and perfect.

As for now, I just overlay graphics on flat apparel in 1 plane, but will your library allow me "transform" a graphic before I overlay it on an apparel piece so it looks natural when placed on a person/ model turning sideways?

Placeit.net has built an entire mockup service around this functionality...
See here: https://placeit.net/c/mockups/?f_types=image&f_devices=T-Shirt&f_tags=Selfie&is_list=true

Rock on John! I hope I can help you as much in the future, as you have helped me.

Regards,

Wyatt

[jcupitt]

I like the mockup generator.

Yes, libvips can do that, it has a warp function. You need to model the share you want to fit though, and that takes some maths and a bit of effort.