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Got SDF collision mesh generation (via marching cubes) working with Jolt Physics! The collision mesh is regenerated when the SDF scene changes. Individual SDF primitives can be made "dynamic", which adds them as physics objects. 1/

Mike Turitzin

7,385 subscribers

10,942 просмотров • 1 год назад •via X (Twitter)

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Комментарии: 11

Фото профиля Mike Turitzin

Mike Turitzin1 год назад

You can see the collision mesh later in the video. It's much lower res than the resolution used for rendering (and rendering is done via ray-marching a 3D texture rather than triangle meshing). 2/

Фото профиля Mike Turitzin

Mike Turitzin1 год назад

The video covers it up pretty well, but I'm actually just generating a single collision mesh "chunk" right now - so the obvious next step is to chunkify the whole world and add/remove chunks as the camera moves around. It's cool to see things more interactive! /end

Фото профиля Elise Oyin

Elise Oyin1 год назад

All in Christ Jesus for all ages, every efs each using sap on eaic decree with their living spirits, souls, faiths, wills, efs plead the Blood of Jesus Christ of Nazareth pbz to destroy all stopping the true form of Elise Oyinkromeineifa's pregnancy from being in Yahweh's name

Фото профиля Makan Ansari

Makan Ansari1 год назад

This is so impressive! Editing SDF with Physics in real time!

Фото профиля Yeltan

Yeltan1 год назад

that's so cool, but how do you have sdf objects use this collision mesh while maintaining good performance? if i were to wanna make something with sdf physics, are there resources you'd recommend?

Фото профиля Mike Turitzin

Mike Turitzin1 год назад

The main cost is regenerating the collision mesh when the (static) SDF scene changes. I think I can get that fast enough, though, as the collision mesh resolution doesn't need to be very high. I'm using Jolt physics and feeding it triangle meshes:

Фото профиля Breakaway

Breakaway1 год назад

Nice mesh construction. I'm curious though, isn't it more performant and less hassle to use the SDF as the collision object directly?

Фото профиля Mike Turitzin

Mike Turitzin1 год назад

Maybe, but I'm not aware of straightforward ways to do this for arbitrary SDFs. A big complicating factor is that smooth blends (as well as subtractions) make the distance field a bound rather than exact, which means it becomes a lot harder to compute overlaps.

Фото профиля Leo Benaducci

Leo Benaducci1 год назад

Did you try Surface Nets? I believe they are faster to generate but also have lower quality

Фото профиля alxo

alxo1 год назад

what is the compute cost? nice job!

Фото профиля Scott Richmond

Scott Richmond1 год назад

Very cool stuff mate! I wish this kind of work was more readily available to developers to create more interactive worlds. Is this something you're planning to release in some form or another?

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📣 #NVIDIAKaolin v0.15.0 is out! With the latest release of our #Pytorch Library, extract a high quality #3D mesh for your SDF using Flexicube. Have a look at the updated official repository using Kaolin's implementation: ➡️ 🧵1/2 #NVIDIAResearch

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Did you know that in Blender you can easily make pillows with the 'Cloth' modifier? ✨ 1. Select the object that's gonna be beneath your pillow 2. Press 'Collision' on the physics tab 3. Add a cube and add some loops to it with Ctrl+R 4. Press 'Cloth' on the physics tab 5. Enable 'Pressure' and set the custom target volume to 1. You can tweak this value depending on how big your pillow is 6. Decrease the collision distance in 'Object Collisions' 7. Press space to play the animation 8. Press Ctrl+3 to add a subdiv modifier with 3 levels to make it look smoother! You can choose a frame that you like and apply the 'Cloth' modifier to make it into a static mesh by going to the Modifiers tab, hovering over the 'Cloth' Modifier and pressing Ctrl+A! For better results add more loops to your original mesh! ✨ #b3d

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The National Context

116,501 просмотров • 9 месяцев назад

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