Hello Dr. Sassi,
I agree, I feel like the random filling would be the best route.
I'm assuming on the first scene, you just created a long spline, tweaked some parameters, and let gravity pull it down into the sphere? I think that's probably the route I'd go for this animation. I guess now I'm just wondering if there's a way to get the same effect, without needing gravity as the force to pull the spline. Again, thanks for helping me troubleshoot this! This is very helpful.
Seun
This might also help: Here's the product page for the coil: https://www.stryker.com/us/en/neurovascular/products/target-tetra.html
You can see that the model isn't very complex, just the shape. And there's a sample video of it being used in real life at the bottom of the page. Clinically, it won't actually take on the tetra shape when it's deployed, it's close, but it ends up looking kind of random. But for the sake of animation, I'll need it to look like the tetra shape.
Hopefully that helps illustrate it needing to feel less like a snake moving along a path and more like it's a rigid wire being fed through a tube into a tight space.
Hello Dr. Sassi,
Thank you for responding and putting together this example project. I think what you have is a possible way of executing this, but I think the unique thing about the animation is that it's supposed to feel like the coil is being fed through a tube from the proximal end so it it bunches up in the sphere. So the distal tip of the coil does not continuously moving along the entire spline path. Does that makes sense? Ha
Here's a very old video that demonstrates the same motion: https://youtu.be/qcVdsLEqYqI?si=PBZ7_Y1yUU1VHVWJ&t=35
I've attached a example project with a dummy shape of coil.
I have CAD for the coil in it's final Tetra shape, but since it's a pretty simple model, my plan was to remodel it so it's uncoiled and completely straight to it's 6cm length, and then spline wrap it to the final spline animation/sim. I just need to figure out how to animate the spline like the reference videos.
Seun
Example video below:
https://drive.google.com/file/d/1M7FgWmEj6YZz4qG52Jq4UX3iEPKtI5h9/view?usp=sharing
I have a project where I need to animate a coil object like this so that when it deploys it conforms to a predetermined shape. It doesn't seem like C4D's spline wrap animation can achieve this kind of a result because of how it moves the source object through the spline. I need some kind of a technique that dynamically deploys the "spline object" but adheres to a fixed shape. I'm assuming it needs to be dynamic, but open to other solutions.
Thanks,
Seun
Thanks for the file Dr. Sassi. I appreciate you taking the time to look at this with me and troubleshooting it!
I'll look through this file and hopefully come out with a solution.
Thank you again!
Seun
Hello Dr. Sassi,
Thank you for taking the time to put this together. Yeah, it's different from my original execution, but I think I may be able to pull some ideas from your setup. Below is a link to a reference video that I got of the mechanical area of the product. Should explain why I had it the way I did haha (but clearly not working correctly)
https://drive.google.com/file/d/1Mj1f3qSwxuXsZVuPtpzKe25ixAD3dhmR/view?usp=sharing
Thanks!
Hey Dr. Sassi,
That looks correct. I originally reduced the file so I could upload here initially, but here's a more complete version:
https://drive.google.com/file/d/1YV2BRo7oIo4FL8XGiKM05cq41KprGsqy/view?usp=sharing
Thank you again!
Hello Dr. Sassi,
Thank you for putting this together! I took a look at the file and I think I understand what you have going on there, but I don't think it's the rigging solution I'm need for this. Sorry for not doing this in the initial post, but I've attached a project file below. I tried uploading it but the c4d file is too large and the forum wont let me upload .zip files.
https://drive.google.com/file/d/1rphyFI7bImhN-DetdjdNeqEiyvBnA6G_/view?usp=sharing
Thanks,
Seun
Hello,
I'm not sure how best to describe this type of rig, but I'm having trouble rigging a multi joint rig like this:
I've tried using a IK rig but I can seem to find a solve to keep those middle joints connected when I move the rig.
The best resource I've found for this is this video: Manfred Frank Hinge in Blender, but I'm not sure how to translate it over to C4D.
Would really appreciate the help! This problem has been a frustration for day!
Thanks!
Seun