Looping flag with cloth dynamics

- [Instructor] Welcome to Motion Graphics Weekly…where you up your mo graph knowledge…one week at a time.…I'm EJ Hassenfratz.…Let's get our learn on.…In this week's video I'm going to introduce you…to motion tracks and how you can use them…to blend between object states…to loop cloth or dynamic simulations.…So, I have this flag element that's basically just a plane,…let me just rename this flag,…and we have our cloth dynamics…on this piece of geometry,…and with the cloth dynamics working…and some points pinned…you can see these forces are distorting…and treating this plane as if it were a flag…blowing in the wind.…

To get this to loop…you can see that as this goes to the end of the animation…it's just going to snap back to the original point…at the start of the animation here,…so it just pops right back…to this flat state.…So, to get this to loop nicely…what we need to do is give the cloth simulation…a little bit of pre-roll…and what we can do is actually store…the state of the deformation.…So, I'll just let this play and run to about frame 50,…