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    Intel Core i7-8650U / NVIDIA GTX 1060
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  1. Just like that, except a little more exaggerated. Meaning, when the ends are stretched, it gets noticeably thin in the middle, and the opposite when pressed together. I am making a synovial joint for a medical animation and they behave very similarly. The joint is part of a much larger rig. I need to put the 'wrapping' (the synovial joint/chinese finger trap situation) around the two ends of the joints. So no interweaving sections or diamond whatsits. This video is dim but does it pretty well And a picture of your basic synovial joint, with two ends of a bone and the pink 'wrapping'/capsule that i want to behave like the trap. Maybe another way to put it, is i'm looking for a way to make an object squash and stretch based on the movements of two parent objects.
  2. I'd like to set up a chinese finger trap rig where if I pull the two opposing goals, the middle trap gets stretched and thin in the middle and its ends follow either goal. And, if the goals are pressed together, the trap bulges and squashes. I know I can use squash and stretch on the trap to get the general effect, but what I really want is for it to happen based on how i animate the goals. I'm posting in newbies because i'm not even sure what this may fall under (maybe we could do this with modifiers? maybe it's better off in xpresso? or maybe some kind of dynamics...) -And I'm a lurker/novice poster so if you tell me this belongs elsewhere i'll go ahead and repost there. Any thoughts on where to start with this one? I'm inexperienced in xpresso but have suspicions it may lead there.
  3. This is great, and worked perfectly when i applied it to the spine model. thanks so much for the guidance! Luckily or unluckily I never rigged in maya so i'm not pining for some past usability... but with a few more handles it looks like i'll have the mobility I need for future projects. excited to hook this up with xpresso and hopefully post some WIPs once we purchase the program! (currently on demo)
  4. hmm i need to play around with this idea more. I constrained each joint to a single up vector (null) and it tilted them around a bit. So instead, I created nulls from each joint mesh, parented each under their respective nulls and constrained those nulls to an up vector. (I can already tell I probably over-complicated this). I then made those nulls, with the up vector constraint, my joints for the ik Spline. It seemed to be behaving differently so I had my hopes up, but once everything was hooked up I got the same strange reorientation of each object. What do you mean by blend the joint orientations? Thanks--greatly appreciated
  5. Thanks! the goal is to get something that can show the mobility of the spine and can be used over and over again for general production. I definitely think xpresso will ultimately be the way to go, if I plan to hand this off to someone else I'd like them to be able to use it intuitively. Sliders will help with that--I did think I needed to get the general rig working before i moved into xpresso? But I assumed it was similar to the Wiring Parameters feature in 3Dsmax, so I hadn't moved on to that step yet
  6. Digitvisions-- Thanks! I hadn't tried changing the settings of the spline yet--unfortunately it looks like bezier is our best option. The others alter the original position even more The joint axis are centered (I went through and aligned-axis-to-center each); I'm wondering if their initial rotation (resting position of the spine) has anything to do with it. Since everything is naturally not lined up in a straight column, maybe when they are linked to the spline they try and adjust to match the spline axis orientation...Because in my tests (with just some block and sphere primitives aligned in a straight column) I don't get this problem. I'm wondering if there was a way for me to also align the axis rotation with to match the spline orientation, aside from me lining up the spline as close as possible manually
  7. Hi everyone, I'm a new convert to C4D (Maya for 1 year, 3ds max for 2 years) and I love it. I'm currently working on a rig for a spine model (link below) so I can animate pathology such as scoliosis and kyphosis. The rig needs to be be manipulative enough that I can control the spine without warping any of my meshes, so I've opted to make the actual mesh into my joints and bones. Vertebrae=Bones Discs=Joints So far i've tried a basic ik rig with a single goal, and an ikspline. I think the ik spline is the route I want to take, because it seems to allow the most manipulative power, but some odd warping takes place when I apply it to the rig. My vertebrae get all rotated in odd ways once I link the spline and the end joint to the ikspline tag. I think it has to do with the alignment of each disc (joint) along the spline, but i'm not quite sure how to fix that. Work In progress. I'm using the amazing skeleton model from Badking: http://www.badking.com.au/site/shop/human/skeleton-model-setby-benjamin-wilson/ Images of my current issue are below, if anyone has any suggestions or if I've sparked inspiration Medillus
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