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Heraklit

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About Heraklit

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    Christo

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  1. Cofe with foam/bubbles on top

    Hey, I have to to some fluid stuff for a cofe. It needs to have some cream/foam/bubbles on top. It shall run in from the top of the glas and generate that stuff on top. Pretty tough deadline. Any ideas on how to approach this in an efficiant way? Maybe using the surface field and change the chading on top depending on the distance? Any tipps are appreciated
  2. Partial collision detection

    hey, little problem here. I have a piece of cloth made out of grains. Its colliding with an object. Here I use a collision detection in combination with a collision behaviour. The collision detection shall only detect a few polygons of the whole object to stop the motion there. Referencint the polys in dops. Its giving me a correct collision guide but during the sim it keeps ignoring it. Insteat it freezes the grains along the whole 'main collision object'. So that are the areas to collide with, just a few squares.
  3. Look inside the exampple files for "spinning flip collision" or so. Its causing an emission in dependency of the velocity
  4. Grains morph target geometry

    Hey, how would you go about transporming the target geo in something different without having the grain solver go crazy? So not just a transform, shuld be a different kind of geo. Also with intact constraints.
  5. Activation expression

    Nope, unfortunately still not working if(($FF<225, 1, 0)) if($FF)<225, 1, 0 if $FF<225, 1, 0 if$FF<225, 1, 0 None of them, its only returning 0
  6. Hey, I got a really stupid question but I can't get it to work ATM. I want to put an expression in e.g. a fluid source node in dops. Something like "if($FF)<225, 1, 0)". So when smaller than frame 225 take 1, else 0 (or another expression like a sin curve). What am I missing here?
  7. Ugly artefacts

    omg, I had to adjust the raytracing bias on the rop
  8. Ugly artefacts

    Hey, got a pretty annoying problem. A certain area of my ocean always gets some artefacts. The dark area isn't responding to AA blur, geometry input etc. Rght behind that its okay again. ANY idea whats the problem here?
  9. OBJ Import Material Links

    OK, got it
  10. OBJ Import Material Links

    Anyway, I can do it like this. But another problem: I can't merge all resulting material node together for rendering. This is causing shading errors. I can display one material at a time and render the whole thing with proper material assignment on one set of primitives. As soon as I try to merge two material nodes together…shading issues. I need to blast the primitives depending on their group. So how can I blast them based on this selection expression? @shop_materialpath=="/shop/Cruiseship_cleanup_v003_rpr:Glas_Grey_DisplaySG"
  11. OBJ Import Material Links

    ATM I have to use the "@shop_materialpath==..." eypression which is handier than selecting every object but I still have to write out lots of material names and then create them manually. No idea of python
  12. OBJ Import Material Links

    I didn't ask for an OBJ but the fbx seems to be corrupted. Well, I'll see.
  13. OBJ Import Material Links

    That doesn't sound very comfotable when you have to deal with hundrets of materials
  14. Hi, I guess thats a pretty easy question but I couldn't figure it out yet. So I have an obj import that consists out of a big amount of pieces. Importing it to other apps brings in the materials too. So I just can work on those materials insteat of reselecting everything. Importing that obj to Houdini doesn't show any materials. Why is that?
  15. UV loop

    Hey, I need a bump map to repeat on each primitive of an object. Not I can use an uv flatten in a for each loop and apply a map onto each prim. That works with simpler scenes. But on my scene the loop has to make 600.000 passes + it tends to crash. Does anyone know a way to increase the speed of this process or a better, faster way? Cheers!
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