Tralfaz Posted November 8, 2006 Share Posted November 8, 2006 I have started rigging my AT-AT and have the front legs boned. The IK chain seems to work and I have added constraints so that the legs will bend in only one direction. After all, the legs are pretty much hinged joints. I am trying to figure out how to keep the feet constrained to the ground, so that they don't go below ground level unless specifically moved there. I have been trying to disect the Rabbit model and have found a number of bones that were hidden and partially undertand what is going on with the bones and the constraints. Is there any documentation or tutorials on how to best accomplish this task and why it is being done the way it is? I would like to be able to understand what is going on instead of just copying or misinterpretting what is being done. Hope this makes sense, I am in need of sleep right now... Thanks... Al Quote Link to comment Share on other sites More sharing options...
Hash Fellow robcat2075 Posted November 8, 2006 Hash Fellow Share Posted November 8, 2006 I am trying to figure out how to keep the feet constrained to the ground, so that they don't go below ground level unless specifically moved there. When are they going below the ground i f you haven't animated them to go there? Quote Link to comment Share on other sites More sharing options...
Tralfaz Posted November 8, 2006 Author Share Posted November 8, 2006 Hi Rob: When working with the rabbit before and creating a walk cycle, you could move the body of the rabbit and the feet would stay fixed to the ground. If you moved the body downwards, the legs would bend and the feet would not go below ground level. Currently, if I move the body of the AT-AT, the feet move with it. If I move the body downwards, the feet move below ground level. If I move the body upwards, the feet lift off the ground level. In the rabbit model, it looks like there are some extra balance and rigid bones connecting and constraining the feet along with some nulls (?) that the extra bones and feet are constrained to aim at. I believe these extras are what keep the feet on the ground, but do not fully understand it yet. Thanks... Al Quote Link to comment Share on other sites More sharing options...
KenH Posted November 8, 2006 Share Posted November 8, 2006 An "automated ground colliding" AT-AT. I know what you mean. I'd have to refer you to a rigger though. Quote Link to comment Share on other sites More sharing options...
3DArtZ Posted November 8, 2006 Share Posted November 8, 2006 Make sure your feet targets are not children of the "Hip" or "torso" bone of the at-at. That way, movement for the feet target is independant of movement of the rest of the body. Mike Fitz www.3dartz.com Quote Link to comment Share on other sites More sharing options...
trajcedrv Posted November 9, 2006 Share Posted November 9, 2006 This seems to be letter "R" in rigging - type problem: it is vey well explained in The Art Of A:M, so check it out! Quote Link to comment Share on other sites More sharing options...
Tralfaz Posted November 9, 2006 Author Share Posted November 9, 2006 Played around a bit last night with this, unfortunately without much success. Will keep pluggin away though. I found some tutorials in the A:M Resources that I will check out when I get home tonight. This seems to be letter "R" in rigging - type problem: it is vey well explained in The Art Of A:M, so check it out! Do you mean the little manual that comes with the software that has the exercises in it? If so, the only thing I found was the exercise of putting the rig into Thom. It explains what to do to complete the exercise, but not what everything is for or how the constraints and relationships are actually set up. Thanks... Al Quote Link to comment Share on other sites More sharing options...
trajcedrv Posted November 9, 2006 Share Posted November 9, 2006 Sorry if I misled you... I was SURE that constraints are explained in the TAOA:M this link certanly will help: http://www.eggington.net/Hash/2001RigDocs/arms_legs.html while you are there, look around: lots of info! I just realized that you may get confused about the screenshots: they oviously are from the older version of A:M, but everything is basically the same, so make an effort to work through the tutorial Quote Link to comment Share on other sites More sharing options...
Tralfaz Posted November 9, 2006 Author Share Posted November 9, 2006 No problem trajcedrv. There were some exercises using constraints in the book, like the Door's Stuck, which I did a while back. I will look at the tutorial you posted later tonight. Sometimes it takes a while for me to absorb information. I think killed too many brain cells when I was younger... Al Quote Link to comment Share on other sites More sharing options...
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