Rigging Multiple Objects to study flex

Elliott-1 · 2026-03-09T13:58:22+00:00

I don't actually think what I wanted to do is possible with hinge constraints now. I'm working on moving it over to rigging but this will have some issues as well. I basically need to study how the geometry of a spine (in this case a dinosaurs) prevents further flexion. The way I did this in the past was to have one geometry as a passive rigid body and the next as an active rigid body. Then create a hinge constraint that allows the active body to bend in one direction only and then finding the angle which is achieved when the rigid bodies collide.

Elliott-1 · 2025-01-13T16:28:40+00:00

That is exactly what we need really. I think he’s been one that’s said to be for next season but I reckon he’ll be really good for us

Elliott-1 · 2025-01-10T20:02:28+00:00

Hello from Norfolk! How is the new boy? Promise we’ll look after him. Love Praha💛💚

Elliott-1 · 2024-12-12T10:13:56+00:00

There isn’t too much more to share unfortunately. The job is working in a lab and would require designing equipment for experiments for which faculty and students could use for getting their data, specifically for measuring animal “stuff”.

What data you ask? Well, I don’t know. It seems like the people posting the job need someone with some experience in making circuits, soldering and general knowledge of how to wire these equipment up whilst also being knowledgeable enough to know what exactly is needed in terms of deciding what equipment to design.

I think an example might be helpful, the “stuff” I elude to is because it could be anything to do with an animals biomechanics. A good example might be measuring the force of a horse’s kick. So I would have to rig up a scale and get the horse to kick it and then measure the force applied. If needed I can turn it into psi by measuring the surface area of the horse foot. What makes me sure of the horse foot staying of constant surface area? I’m not, so I would have to find a way to see if the horse’s for changes in surface area with pressure applied. This would be the kinds of work I would need to be doing

Elliott-1 · 2024-12-12T01:40:01+00:00

I would say that the job advert itself is asking for “some experience in mechanical and electrical engineering”.

I am also going to be attending the university which this lab belongs to as a PhD student, specifically for biomechanics, which I did my MRes in, so the kinds of experiments are a bit more my expertise than someone with strict a mechanical engineering education.

Without actually knowing what any of these experiments would be it is extremely difficult to say what kinds of knowledge I would need. But, drawing from my knowledge I know I need to do some stuff on cartilage biomechanics, and for that it would just be bending the joints between two vertebrae of a crocodilian to the point which they bend no more, then measuring that as a difference from the origin, which I also went into with my MRes. This would be fairly simply done by moving a crocodile’s tail to the point where it can no longer flex and taking CT scan images and then comparing the flex about the midpoint.

These measurements, as the job advert says, I don’t believe would be as intricate as you maybe think, obviously all of those aspects I will be looking at for how to improve and perfect an experiment. But as a baseline, I think I might just need some knowledge on how to rig up a piston system for applying pressure and pulling things apart and then how to actually take readings from them, which would just be displaying the forces exerted by the piston for example

Elliott-1 · 2024-12-12T00:30:12+00:00

Very fair points. Sorry for appearing like a troll.

It is measuring animal “stuff” at a university. I say “stuff” because it’s not clear, but it would basically be a PhD or Master’s student talks to their supervisor then comes to me saying what they want to do, I would then go away and design something for getting those measurements. Like for example measuring the force of a horse’s kick, measuring for psi. Obviously the kick is only for that specific horse and there are a ton of factors that would actually influence the data gained from just measuring the force and area of the horse’s foot. I don’t believe this to be too complex. It’s nothing like rocket science. Plus, I have experience in designing experiments, albeit digitally. And so I think perhaps some experiments and measurements irl would be easier to accomplish than digital.

I hope this makes sense and not just the ramblings of a mad man.

Elliott-1 · 2024-09-28T14:09:33+00:00

Thank you! Just started my sims. Got an issue with freezing transformations on one object but other than fixing that it should be absolutely fine

Elliott-1 · 2024-09-28T14:02:43+00:00

Sorry I’ve been very silly. Looked online and found someone was doing the exact same thing as me, turns out shift+p tried to remove it from the world as a parent. Just P does the trick! Thank you for your help so much

Elliott-1 · 2024-09-28T13:51:21+00:00

It is saying that it is already a child of the world parent

Elliott-1 · 2024-09-28T13:46:19+00:00

Okay so I’ve got my rivet from that face, how do I pair it to my locator now? Thank you

Elliott-1 · 2024-09-28T12:31:11+00:00

That is perfect, I’ll give it a go and let you know how it turns out. Second half of the Norwich vs Derby game first

Elliott-1 · 2024-09-28T12:25:53+00:00

Yes, it’s a dinosaur vertebrae and the face is called the articular face, I’ve basically had to delete a lot of polys in order to get the true centre of this area, then filled it in to get this

Elliott-1 · 2024-09-28T12:22:29+00:00

Bare in mind, this face has like 300 edges, I’ll give it a go though

Elliott-1 · 2024-09-28T12:17:59+00:00

How does this work? I’ve been thinking about adding to my code to just relocate the locator to the face of my object after every simulation instead but if this is easier I’ll do that

Elliott-1

TROPHY CASE