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Found 6 results

  1. Hello; In a flip-fluid simulation, I would like to transfer color from a sphere to fluid, so I used "Solver SOP", but it just transfers the first frame of simulation to the output..! How can I fix this? Thanks for helping. Color_Transfer.hip
  2. What I'm looking for is an object to follow an elliptical curve, accelerating near the perigee and decelerating near the apogee. Theoretically I could wrestle with magnet forces and do a sim for this, but I feel that (1) that'd be unnecessarily complicated, and (2) that this is going to be a collider for another sim, and that might muck it up. I've tried follow path and using primuv, but I have not been able to find a way to accelerate and decelerate them as they follow the curve. I've tried something, attached, that is MOSTLY working. I get velocities from the tangent normals of the orbit curve, and a velocity multiplier based on the min and max x positions along the curve, so at the perigee the velocity multiplier is 1 (or whatever), and at the apogee it's 0.1. Using a solver SOP, each frame I transfer the curvevel attribute to the ball orbiting object at its current location, and then use @P += @curvevel. This actually works for the most part, except the orbiting object keeps going further and further out, creating a spiral orbit. Furthermore, even though I have a wrangle setting its initial position to be at point 0 of the path curve, starts farther away.(Also, I will need to figure out a way to orient it so it's always looking forward, but that will be easy enough, methinks.) I assume I'm missing something obvious within the solver SOP. This might be easy and dumb, so thanks for any help. (Also, if there's just a way better way to do this, I'm open to suggestions!) orbit_setup.hiplc
  3. Vellum Sim With Changing Point Count

    Hey guys, I've tried many different ways, but I can't seem to find any stable way to run a vellum softbody simulation with a object (in my case a meshed vdb advection growth) with a changing point count. I've tried brute force with a solver SOP to run over it every frame, but with no luck. Would love to see you guys tackle this. Cheers! -Isaac
  4. Controlling solver sop

    Hey guys, I am following this Ben Watts tutorial, where he has a system to grow points on a surface. Its a great system , I am still trying to get my head around the sop solver but what I would really like to do is to be able to slow it down. I have tried animating the search radius of the point but that gives me limited control. I tried using a time shift but that just kills the whole grow effect. Any tips would be much appreciated. Cheers. video
  5. hi, i succesfully accumulate Cd attribute via animated sphere on a grid. it basicly transfers and keeps color from sphere to grid. but if i animate grid via mountain sop or transform node , solver sop stops working. it allways shows first frame of animated geometry. is there any solution for animated object? scene file is H14 but same thing happens in h13. thnks. solverSOP.hipnc
  6. I wanted to create an effect where an attribute could be transferred and then spread throughout the object - I found the scene on this page which worked great: http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=28148&view=next&sid=1030caf41e7f90f948b8db61b7222608 However I need to do the same sort of thing inside DOPs - I want to have some highly viscous fluid and melt it with another object then have the heat (or lower viscosity) spread from the point of contact. I've tried using a solver sop inside of a sop solver (connected to the particle motion of the flip solver) however this doesn't seem to work as the solver is using the previous frame so the simulation can never progress (I think thats whats going on). So I basically need to transfer my custom attribute before the pre-flip-solve. Is there a way to do this? I've attached a scene file with my current progress Thanks, Mike wax_melting_v02.hip
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