TouchDesigner particleGPU 2022 Update - Tutorial 

Thanks for the kind words :) My goal is always to try and keep everyone moving through the knowledge. It's not fun if only pros can do it!

Our pleasure, thanks for watching and supporting :)

Our pleasure! Thanks for watching :)

Glad to hear it! ✨ Thanks for watching :)

Glad to hear it! Thanks for watching :)

Our pleasure! Thanks for watching :)

Glad you appreciate it 😂 what's better than learning and having fun? Thanks for watching :)

If you're on the latest build, there's a few new updates, a new video will be uploaded today showing those, but otherwise the functionality used here will work on your version as well!

Thanks! The best route to go for something like that would probably be found in GLSL compute shaders. For this to function, you need to be able to calculate every particle's relationship to every other particle. The compute shader would allow you to work with the kinds of data and textures required much more easily. That said, you can use the Nvidia Flex series of operators in TouchDesigner to achieve that same kind of effect without the need for all of that advanced knowledge/setup. If you're not familiar with it, Flex is a particle-based physics simulator, so it'd be perfect for that kind of thing. The only potential issue is that you need a PC and an Nvidia graphics card to be able to use it. If you're interested in going that route, here's a couple of videos we did on Nvidia Flex: Nvidia Flex Basics in TouchDesigner: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-keVyiCBHWhI.html Nvidia Flex Emitter and Collision Basics in TouchDesigner: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-F3HgBBCaqyg.html Hope that helps!

If you double click on the particlesGPU node to head inside of it, you'll see that there is actually a rendering setup located within it (which is providing the result you see at the output) -- not sure what your intent is, but you might be able to make the modifications you need there. Hope that helps!

A couple of things to try here: - First, make sure that you've set the CHOP to TOP's Data Format parameter to RGB. If it's set to the default of R you'll only be utilizing the data from the X axis - Second, the scale of the 3D model you're working with might be bigger than the bounds of particlesGPU. Try adding a Transform SOP before the Null SOP and see if setting the Post Translate X, Y, and Z parameters to Origin, and the Post Scale parameter to Unity makes a difference (these are all located on the Post parameter page). You can also use the settings on the Transform page to try manually adjusting the position/scale. particlesGPU will use the actual points that make up the model to spawn particles, so it should follow the contours of the shape. Hope that helps!

Our pleasure! So just to clarify, are you looking for the position of the particles to be static rather than moving? You can reduce the amount of movement by adjusting the forces applied to them on the Forces page, but note that they’ll still be subject to the same lifespan/regeneration settings as usual.

@@TheInteractiveImmersiveHQ Hello! Thanks for taking your time answering! :) With static i mean not drop in and out so much, I think i solved that with Life+Variance. Basically what I want to achieve is the behavior in this video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-M8X_FFB-ikQ.html 'Drag' in the new particlesGpu doesn't seem to do the same as in the old version from what i can tell? And velocity seem to only move the particles in one way? In the video i reference to the particles seem to move based on the TOP ParticleSource input.

This is true, however you can still use SOP geometry to emit particles by converting it to CHOP channels and then a TOP texture. ParticlesGPU 2.0 also has built in particle source options that cover a lot of the basic geometric shapes, which can be helpful for situations where complex geometry isn't required.

Yes, definitely! In the latest version, there’s an option to set the colors of each particle using a TOP texture, which you can connect to the second input (labelled particleSourceColor). If you were to plug in the texture that you’re using for the particleSource, you could use that same texture to apply colors to the particles. Hope that helps!

Oh nice! I will try this out, thanks!

It worked! amazing effect :)

Great question! The blue box shows the bounds of the particle system, and can be turned off via the Display Bounds parameter.

@@TheInteractiveImmersiveHQ thx 🙌🙌🙌