Sprite Swap / Resolver and Sprite default pivots issue

Hello there !

I'm importing a character made in photoshop and saved as a *.psb file.
Some parts of the character will be animated thanks to bones based animation and some part of the character will be animated with frame by frame animation technique (like eye blink for example).
So it is kind of an hybrid animation

I red all the documentation about sprite swapping experimental feature and it sounds just perfect for my use case so I set some categories to my sprites that I want to be able to swap (eye-left, eye-right, and so on).

The main issue issue is that when I swap the sprites they do not stay in place like in the original *.psb file because they all have a default centered pivot.

I think there is no point at all by setting all the pivot manually because I needs a very precise calculation of the pivot point of every sprite depending on how Unity slices them and their position in the original *.psb file.

Is there a way to tell Unity to set pivot to each sprites that belong to a "category" so that the sprite stays in place when you swap them. If not the feature of sprite swap is useless for sprites that have not the same exact size and it is very sad (My opened eye is bigger than the closed eye layer, see what I mean?)

Thanks for your help and your amazing work

 

Hello @Ted_Wikman,

About the "creating your own import post processor to update the pivot when importing a Sprite/Texture." honestly I don't know where to start. This issue is related to only one asset of my whole project so I don't know if writing code for just one single animation is a great idea, but it can be a good challenge so why not

I think we can have several different approach.

1/ The sprite slicing auto adjust the pivot of each sprites that are on a same folder in the *.psb file
OR
2/ The sprite slicing auto ajust the pivot of each sprites that share a common category

On every of the two previous scenarios all the sprite have to have a position that overlap in the original psb file.

I don't know if adjusting the pivot is a good idea...

Maybe it can be the responsibility of the Sprite Resolver component to keep an offset whatever the pivot is so that all the sprites appears at the exact same position than in the psb file ?

 

@Ted_Wikman I can send you a minimalist Unity project with a single *.psb file and a scene in it to show you what are the issues I'm facing as a developer.

The demo project is already ready tell me if you are interested by experimenting my use case



Have a nice day!

 

Hi @Ted_Wikman,

I just DM you with a link to my sample project
Feel free to share the result here with the Unity community.

Have a nice day

 

Thanks @xiangtingsu! Happy to help if it can improve Unity!
Tell me if you need anything else.

 

I'm also having trouble with this issue.

 

@Ted_Wikman

Well it doesn't lol. I'm either doing something wrong or it's a bug (relatively new to unity although I have background in web dev, and dabbled in game dev over the years). The beards are in pretty much the same spot in both PSB's. Unity was changing the pivot point for some reason. I think it's working correctly now although not sure what I did to resolve.

 

In case somebody stumbles across this and also uses 2D Animator:

Enabling "Auto Rebind" on the SpriteSkin makes adjusting the pivot point obsolete and positions the sprite correctly (tried with 2D Animator 6.0.5).