Thank you!!

Thank you so much!

Have you any experience doing cool things like you do, but rendered in THREEJS?

Can someone simulate a gearbox or a pulley system?

Awesome, very very awesome. Thank you so much.

I'm trying to implement this in Unity but soon realized this is beyond me...

fascinating

What I found is that when using only one iteration the velocity error is too big that results in instability. I need at least 2 iterations to get stable results. Also too many substeps leads to vibrations, not exactly sure why but I guess it’s because the velocity gets bigger when the delta time is really small. When solving collision or distance constraint, the position change is irrelevant to delta t, so if you have a small delta the velocity is much bigger.

Great video! I'm wondering if you will do a video about the SDF method?

Send me more simulations.

Hello, do you have example of rectangle (2d car) collision example, I need it for me racing game. Ps. Great channel, I mad pinball conversion using your video, u can check: Pinball Dreams Online - JavaScript © Paweł Drabowicz

That was so great. Thanks

Very well done, many thanks!

I feel like this video won't age well

Hi ! I don't really understand why at 1:45 you say a large stiffness implies stability problems ? I don't know if the link is obvious, but for me it isn't so if anyone has an explanation I'm open to it ! Thanks for all the work and resources you put out :D

concerning surface nets... why do all you graphics guys use first order interpolation then gradient descent to make up for the lack of using second order interpolation? :) cubic is just a few mults and adds. i'm your fiend, you should refiend me on dicsord, imagine banning me becaus ei got tortured by the u.s. government.

does XPBD not have a factor of lambda*alpha to the numerator of the calculation of lambda?

Видеопоток, можно считать на декодере mp4.

Genius!

I wish I could follow even a little of this. It looks very cool.

I think the "unbreakable" thing can't be understated since Matthias is using a broken non conformal tetrahedral mesh and yet the simulation is still behaving quite nicely

Very impressive make me build an interest in programming

Please consider helping Blender community to implement XPBD physics, you are the one that can do it, that would be great!

素人が一からこのシミュレーションを作ろうとすることはできますかね？

wow, backwards name guy just banned me from your discord because i mentioned th eoj simpson mkultra child rape coverup in off topic. i guess, not so off topic huh.

Very Very impressive. Just wondering if you could add other 2D shapes as obstacles.... may be multiple 2D shapes.... !

Is there a name for the method that is being used in Gauss-Seidel loop? I am new to this and I have seen examples of solvers solve for pressure in the iterative loops, then update velocity after. Here we directly update velocity.

THANKYOU! SO many talks about fluid simulations (and fluid/water in general) mistakingly claim (orimply) that water *is* incompressable. this is the first time i've seen someone correctly assert its "functionally incompressable" XD

Hi Matthias, I found your video from 8 years ago talking about air mesh for collision handling. Is that still applicable here? I am looking for a method to solve self intersecting cloth due to character animation (eg. arm pit and cubital area) which comes up a lot in production

Verlet integration handles constrains by adjusting previous position, which in some way, seem similar to PBD method. Could you compare the similarities and the differences between PBD vs Verlet. Thanks

You are amazing.

Unfortunate that you use X for position and P also for position. This is very confusing for me because P usually is used for momentum in physics, which is vector velocity times mass for a particle.

Hi! Have you also looked into eulerian simulation of advection? I used the same approach as you, however I find that semi-Lagrangian advection has a problem of energy loss. The problem arises when velocity vector is so great, that it "skips" a few cells and can end up inside a wall. In such cases, advected velocity becomes 0. I haven't been able to find a better method though.

Shalom evening Mr. TMP Outstanding videos you have. Thank you for sharing and teaching. Night

So-called "incompressible" fluids aren't truly incompressible, as they manage to compress themselves under their own weight, more the deeper the fluid pool.

how do I implement self collisions with this?

I made the same algorithm using c#. It works but I can see a global dumping of the energy even with a single pendulum. What could be the reason? Thanks!

What you do is outstanding... Thank you 🙂

This scares me... who will own and control this technology?

Very excellent tutorial!

With the current constraints and the current mesh, it is possible to bring the object to a state where all constraints are working against each other, stopping the object from recovering to its rest form. You can grab the slider and move it quickly between the allowed min and allowed max and eventually you will see what I mean. Same if you are alternating between squash/run rapidly. Do you have suggestions to prevent this from happening?

Love all of your videos, they are simply awesome, thank you so much for taking the time :) I was just wondering if there is a very minor 'bug' in your code or not (its probably totally unnoticible in the result). Should you not be using an unmodified height when reading the neighbours to compute the velocities? There may be some slight errors introduced due to reading the positional damped height in directions which cell heights have been updated this frame (line 247-252).

I just found a gem!

LOVE THE VIDEOS!!!!!!! GREAT JOB!!!!! Could you do: Moving Least Squares Material Point Method ????

LOVE THE VIDEOS!!!!!!! GREAT JOB!!!!! Could you do: Moving Least Squares Material Point Method ????

Hello Matthias, Would you have tet meshes of the dragon or the bunny that are topologically correct please? No offense but your blender plug in is a bit broken. There are holes within the meshes, and no manifold edges and vertices :/ Online I only find meshs with tens of thousands of tetrahedra

Thank you so much for the great contents and I have been rewatching the videos many times! ❤ Definitely looking forward to the upcoming tutorials for viscous liquids and other fluid simulation methods.

If viscosity can be implemented, will fluids with a very high viscosity retain their shape when moving around?

In code you subtract the actual distance *from* the rest distance (L0 - L), but in the mathematical equation you show subtracting the rest distance *from* the actual distance (L - L0). This is quite confusing.

Confused about gradient calculations C1 and C2. C1 is shown visually as facing the opposite direction of C2, and yet its calculation is the same. Shouldn't it be X1 - X2 to go from X2 to X1?