"Ghost" animation problem

Vliir

Hello everyone
My problem concerns the animations after having editing a key frame.
I explain : i work on a static animation for a video game character. His breathing is in two stages and has an inspiration and an expiration. When he does that, his legs raise and then fall. To animate this part, i take the entire body up and then i stretch his leg with the pose tool down for keeping his feet on the ground. But instead of just stretch the legs, Spines raise up the legs before the ground's key frame and makes the same after when i start the animation. So my character shakes his two legs when he would must just keep his feet on the ground.
It appears the software misunderstands the new key frame and keep in memory the last position key frame.
I don't understand if i can "lock" the position of his legs on the ground instead of trying stabilised them myself.
Is it a bug or did i misused the tool ?
oh and at the same time, the ghosting tool continues to display even if i deselects.

Sorry for my English, i use google trad for corrections.

Nate

I think you are saying that the feet don't stay perfectly still when you move the body? Can you post a GIF (eg using imgur or attach to your post) showing the problem? It can be a little tricky to keep the feet in place. Sometimes you can adjust the curves on your keys. It may be easier with IK pinning, which is a new feature that is planned.

Ghosting displaying for all bones unless you have checked the select bone button in the ghosting dialog, then it displays for only the selected bones. If you have no bones selected then it still displays all bones.

Vliir

So, this is the monster :
http://i.picasion.com/resize77/ebfb21831dccc191f06281769ebe614a.gif

If you concentrate on the down of the gif you can see the shake on the legs.
Sorry for the framing, i'm not familiar of the animation's tricks 🙁

Nate

When you rotate the upper and lower leg to compensate for the body moving upward, you end up with the rotation of the legs causing the feet to be perfectly on the ground both when the body is down and when the body is up. However, between these extremes the rotation of the legs may not result in the feet being on the ground. This happens because the leg rotation is moving in an arc and the body translation is moving in a straight line. To fix this you can 1) add more keys, or 2) adjust the curves.

Adjusting the curves is best. Click on the keys for the legs when the body is down, open the graph. Drag the timeline until you see the feet are furthest from the ground. In the graph, change the curve to bezier and adjust the curve until the feet are on the ground. Try different timeline positions and adjust the curve as needed. What you are doing is changing the speed of rotation for the legs so the feet stay (about) in the same place as the body moves.

You can also do the same technique on the body translation instead of the leg rotation. In that case you are adjusting the speed the body translates to keep the feet in place as the legs rotate.