Reply to post of user Juani
Hi, could not you do it by duplicating all the key frames and scaling them to (-1) before making the bake?

Yes, I think I can do it, but baked vetex animation weighs a lot and I need animation in both directions. My app is already big and I'm trying to save every kB.

Unfortunately none of yours advices apply to me. I do not use Shape Key's. I'm using Curve Modifier with curves that are animated via hooks on handles - that's why I'm baking vertex animation

Hi,
Is it possible to play baked vertex animation in reverse. I know that you can reverse NLA strips, but baked animation is not showing up in the NLA editor (even with "Allow NLA" option). Is it possible in the editor/code somehow?

Hi,
I'm trying to make book opening animation. It looks… good enough in Blender, but inside browser pages are intersecting each other during movement. I've tried "Optimize keyframes" (on/off), "Use Native Baker" (on/off).
Nothing seems to work. Problem looks a little bit like there is not enough precision with bones rotation? I don't know. Maybe one of you guys can figure it out.

Here's blend file: link
Here's html: link
Blue box starts animation

As you can see there's a lot of bones - book has to be fairly smooth. Maybe there's another way to this?

Congratulations to first and second place winners! Good job guys!
This was first time I've used Blend4Web and my programming skills are very close to nonexistent, so I had to limit interactivity.
But this is definitely not the last time I'm doing something with B4W.
Also I've updated Mercedes a bit - background color, overall saturation, specular on tyres and added camera limits (I really don't know how I've missed this).

Hi,
Here's my entry to the contest. I went dirty and forgotten path.

link

Project .blend file link

First test version inside Blend4Web:
link