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Everything posted by moneitor

  1. Pop Attract with set of points ?

    maybe with a draw or something would be easier to understand what you need.
  2. Hi all, I am trying to create a setup where a set of rbds are following a specific animation, so far is working, jittering is something I can look into later, but for now the big problem is creating the constraints, if I bring the boxes the usual way with the rbd packed object the constraints will work, but bringing them with the popsource they don't work. Would love to get some help here. Thanks. constraintProblemsTest.hiplc
  3. Constraints mixing pops and bullet

    Hi Matt, thanks very much, I haven't seen your answer, sorry, it was months ago haha, at the end I used a different approach, something that wikipedia calls harmonic damped oscillation, or something like that, basically is F = -KX -CV, I used that formula to drive the position of the rbds to the goal position. Also used a modified version of that formula to make an orientation follow, the result of that research are this two videos. Thanks very much for your answer by the way.
  4. Loop Particles for Geo Instances

    This one should also work if you increase the substeps. LoopParticlesTEST.hip
  5. Loop Particles for Geo Instances

    if you do it with the hittotal attribute alone, its gonna work only during the first collision though. Check if maybe this helps LoopParticlesTEST.hip
  6. Loop Particles for Geo Instances

    Do you need to use pops, or can it be done in a procedural approach that doesn't involve simulation?
  7. How to change attribute path

    you could do this in a Python sop maybe, although I am not very good with python oldPath = /shop/blablabla lastPart = oldPath.split("/") newPath = "/mat/" + lastPart[-1]
  8. Any chance to have a sample file to give it a try?
  9. Controlled FLIP tornado (whirlpool)

    This one have a vop that allow you to change the shape of the whirlpool using a ramp armFX_experinemtal2.hipnc
  10. Controlled FLIP tornado (whirlpool)

    what about a more procedural approach like this, I am not saying that it couldn't be done using particles, but this seems like the kind of things I would approach splitting the effect in different parts, one would be the waterfall, and the other one would be the wrilpool, and then at the end I would mix everything with secondary particles, spray and stuff like that. armFX_experinemtal2.hipnc
  11. Calculating / matching orientation

    I just tried another approach building the transformation matrix itself, the transform contains the transformation values of the set of points B pc_match_001.hip
  12. This is probably more like that. pointsOnPrimitiveGroups.hip
  13. No I misunderstood the question, I am gonna prepare something else. Sorry about that.
  14. Is it something like this?, I am doing it inside a for each, maybe is not what you are looking for, but have a look. pointsOnPrimitiveGroups.hip
  15. point color on a changing mesh

    You could paint colors in the geometry that you get from dops before the vdb process, and then attribute transfer the colors from that mesh into your vdb mesh.
  16. Crawling insects coustom solver issue

    Hi, check if this help. Although I would think to add some noise to the motion too, I moved everything related to the motion to the same solver test_v01.hiplc
  17. Ship Kelvin Wake

    Hi Sergey, pretty cool job, did you use any paper to get the formulas or did you figure it out? in case you use any paper, would you mind to share them to check them out? Thanks very much.
  18. velocity fields for grains

    you should be able to create your vectors in sops, and then in the pop network you can bring those vectors inside a popvop, and play with that, maybe this helps grainsV.hip
  19. Man, I am very sorry but I have to say that those bipeds... have absolutely no idea about how to dance salsa properly.
  20. whitewater setup on deformed wave

    I did again something quick in my part of the setup, nothing fancy but is to give you an idea, I didnt did this in your part of the setup because I dont think with your current setup would be posible to create nice motion on the particles, unless you sculpt some forces, because basically you dont have a nice initial velocity for your points. regarding the floating particles, I am using an intersect, for sure a VDB would be faster, but in the office I have limited access to H16 so I had to do something very rough and quickly to give you an idea. It got lots of errors, but maybe serve as an starting point. WaveDeformerTestQuickMask_edit2.hip
  21. whitewater setup on deformed wave

    you could use a vdb and them move the points using the gradient of the vdb, or you could use your mesh and then use a ray vop to keep the points in the surface, but with a static mesh I won't expect the points to have a very cool motion though.
  22. whitewater setup on deformed wave

    I setup an example of how you probably could create a mask, is something I did very quickly so of course is not something you can actually use, but maybe it help you thinking about a way to create your setup, after the emittion, most of your job will be in pops, finding a way of making the particles "float" on the surface of your geo, is not that hard though. Maybe on the weekend with time I can prepare something. WaveDeformerTestQuickMask.hip
  23. whitewater setup on deformed wave

    Ill check the file tonight when I get back from work. The scattered points are just the emitters of your particles, not the particles themselves. I just opened the file very quickly but I don't see any animation on the waves, is that gonna be a still? or you were thinking on build your fluid simulation from there? because right now I see you are creating the mask, but there is no velocity in the points which of course wont give you any nice initial motion on your points.
  24. whitewater setup on deformed wave

    something that comes to my mind is that you could create a mask in you mesh based on the velocity of the points and the curvature, then scatter some points in that masked area and use pops to create your white water, I did a white water setup that way here at my job for non hero shots and is working pretty nicely. If on top of your animated wave you are using an Ocean spectrum then is much more easy, because the ocean spectrum will give you a bunch of useful attributes, like cusp, velocity, etc... Then inside VOPs in a pop network you can use those attributes to drive the motion of your particles, which I think is basically what the white water solver does, but instead of using the attributes from your ocean spectrum, is using the attributes from your flip simulation. Let me know if this make sense.
  25. [SOLVED]Scatter By Inverse Volume Density?

    You could fit range the density in a volume vop, but anyway in I think the low density in the wings is just because the wings are a thinner geometry so they look less dense, you could create another scatter based on color, painting only the wings, and then merge them together. Not the most procedural approach but would work.