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Subject: Getting what I see?

WarKirby opened this issue on Jul 07, 2008 · 6 posts
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WarKirby ( ) posted Mon, 07 July 2008 at 9:48 PM · edited Sat, 10 August 2024 at 6:13 AM

I've been wondering for a while why the feet in my animations are sliding on the ground, when they're perfectly planted within poser.

Until someone nicely pointed out that IK gives false results. When I export as bvh, I get what I see if IK is turned off, not with it on. This is annoying because I can't think of any other way to make the feet stay perfectly in place when they're not supposed to move.
Does anyone have any suggestions on how I can make my animation actually look like what it appears to be with IK enabled on the legs?

markschum ( ) posted Mon, 07 July 2008 at 11:33 PM

I use multiple keyframes with break spline to stop spline interpolation of the foot position once its on the ground .

Acadia ( ) posted Tue, 08 July 2008 at 2:32 AM

What I do  first  after posting the figure is to identify which leg is the weight bearing one.

Then I go back to frame 1 and look at the figure from the side while moving the slider to the right, paying attention to the weight bearing leg.

Depending on which direction the foot slid, I go back to the frame where I set the pose and then use the Z Trans dial to either move her a bit forward or a bit backwards to compensate for the sliding.  If the figure slid backward, I move the Z Trans dial to the right to move the figure a bit forward. If the figure slid forward, I move the Z Trans dial to the left to move the figure a bit backwards.

I then go back to frame 1 and move the slider to the right to see who I've done and if I need to adjust the Z Trans dial further. Once I am happy with the front/back movement, I do the same for the side movement.

This time I look at the figure's feet from the front and doing the same thing as I did above, I adjust the movement using the X Trans dial.

Before I render I make sure I go back to the keyframe window and delete the frames from the main camera just in case I've messed it up along the way.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi


WarKirby ( ) posted Tue, 08 July 2008 at 3:08 PM

Someojne told me using translate on body parts is a very bad idea.....

Can yuo expain more about breaking splines? I know how to do that, but I'm not sure which parts it should be done to

lesbentley ( ) posted Thu, 10 July 2008 at 3:13 AM · edited Thu, 10 July 2008 at 3:14 AM

Try this. Compose your animation with IK on, give the feet a keyframe in all frames. Run the animation once (not sure if this is necessary), then turn IK off. If you now run the animation, I think you will find that the position of the feet has been remembered, even though IK is now off.

WarKirby ( ) posted Fri, 11 July 2008 at 9:12 AM

That's an awesome idea, les. Thank you.

Something like that will kind of inhibit farther editing though, so I guess I'll have to do that just before exporting.

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