Please go through the varies search results, here, for similar inquires.
Also your sample is quite complex and uses the following third party scripts (see source code of that page)
- Paralxify: Galaxy Demo | parallaxify jQuery plugin
- Greensock: GreenSock | TweenMax
- scrollr: Prinzhorn/skrollr · GitHub
I know that the example is complex...and maybe i explained myself bad (sorry for my english though) the thing i want to achieve is the movement from label to label with one scroll, instead of continuous scroll i want to move a certain number of pixels so i scroll labels and for every scroll i make the "stage" have to change and some animations have to start when i'm on that particular stage (and backwards). I hope this explanation is better.
Please go through the search results (first link I posted) - a variety of use cases already have been brought to the table and answered.
Have you found a solution for your problem. I would like to do exactly the same thing. I can trigger animations with the click, dbclick, mouse hover, but not with the scroll. Mouse down an mouse up also not working. Also, I can scroll through animation frame by frame (or more frames depends on mouse settings, how sensitive scroll is).
Any help would be great