Skewing/ Shearing From Inside Shader?

Hey everyone,

I have a fairly typical, rectangular HP bar that has its top-right vertex pulled out to the right (see image). I'm having it deplete by using a custom "Mask By Offset" shader that I applied to a new uGUI Image object. Ideally, I would like to skew the sprite, so that as it depletes the slope on the right becomes less and less pronounced, until perfectly vertical. Since we can't access a sprite's mesh, I was wondering if I could perhaps achieve the same effect through a shader. Essentially what (I think) needs to happen (for this specific use-case) is that the bottom-right vertex of the generated mesh plane needs to shift to the right my some amount. Is there an easy way of doing this? Or perhaps there's a better solution altogether?

Thanks in advance,
Patrick

 

A new month, a new round! Anyone? =)

 

@Senshi , any luck?

 

@Ben BearFish I'm afraid not, though I haven't revisited the issue in quite a while either.