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tagosaku

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About tagosaku

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    tagosaku sky
  1. hi, I have a question about pyroshader in houdini16. There are fire shading and smoke shading parameters separately. That's why I was thinking we could control alpha of fire and smoke separately, too. However, when I change general > smoke > Density Scale value, it influences to fire alpha, too. Then if I set the density scale to zero, actually fire alpha also becomes zero although fire's RGB shows red-yellow color. Thus questions are: 1 - what's the reason/concept we don't have a separate "fire density(alpha) scale" parameter? (Of course, we can separate fire and smoke by AOV with smoke_mask and fire_mask.) 2 - Let's say I need to create a custom shader for it. What kinds of two volume fields should I use for fire and smoke's alphas? Also, inside of pyroshader, there is a pyroshadercore node, which is an essential node but cannot be unlocked.
  2. it sounds boolean node is really designed to use once. Thanks for your tip. I will check it out!
  3. Yes, I installed SP1, but it happened. The solution was to reinstall windows from reformat again. The second round worked out. Thanks, guy!
  4. Hi, I have substep setting questions when an object(emitter and collider) moves very fast. I am expecting to change 3 points: 1 dopnetwork > simulation tab > substeps 2 pyroSolver > advanced > min/max substeps I am not sure which one I need to change the above?? 3 emitter (collider) should be produced substep volume(denisty/SDF). From the volume/VDB, can we produce inbetween volume/SDF objects with timeBlend and/or attributeInterpolate? Or actually houdini will automatically handle all the substep sources?? I guess if meshes which are before converting to volume are able to create substep, FluidSOurce and VDBfromPoly nodes could create substep volume. But what if mesh is cached, what's happen? Ultimately, I believe ex-colleague showed me that he made a pyro tiny smoke, and created 4x slower motion post-smoke by somehow interpolating. Thus, if anyone knows substep settings and post-slowmotion voxel anim, I really appreciate it!
  5. hi, when I try to use a boolean node twice, second boolean result is always broken because I guess a connectivity issue. Houdini cannot understand the connectivity from first boolean result. I know some people says to cut together with many cutters, but I have a certain situation to cut separately. For instance first boolean produces 500 pieces, and keep 300 pieces and use second booleans for other 200 pieces, and so on. Some artist do after-1st-boolean > loop start > delete all pieces(groups) except one favorite piece > do-2nd-boolean > loopEnd > merge together. Or, I do translate and separate each other of pieces in order to make spaces between each pieces, then apply 2nd boolean, and it works I wonder if anyone knows smarter methods, instead of translating or looping booleanTwice.hipnc
  6. Because I needed to reformat Windows7, I also reinstalled Houdini, and got strange UI. The node info is broken. Does anyone have ideas how to fix? OS, hardware, videocard, and houdini version should be also same as before. I tried houdini 16.0.600,630, 504, but all same strange result.
  7. Because I needed to reformat Windows7, I also reinstalled Houdini, and got strange UI. The node info is broken. Does anyone have thought how to fix? OS, hardware, videocard, and houdini version should be also same as before. I tried houdini 16.0.600,630, 504, but all same result.
  8. umm, the result is not right..
  9. I solved it by F1's help, thanks activation> (strcmp(prims("../../IN_coll", 0, "name"), "density") == 0) || (strcmp(prims("../../IN_coll", 0, "name"), "surface") == 0)
  10. that's great. I will test it out, thanks!
  11. Oh, I am sorry too that I just knew there are TWO expressions, "prim" and "prims" !! I completely misunderstood them. Thank you, f1, so much for providing a sample file. I am checking it out right now!
  12. Hi, I am looking for auto-activation for source volume node in DOP based on an input object(VDB, houdiniSDF). This is because sim is broken, if the sourceVolume set to collision and there is no SDF primitive(@name=density or surface). So far, I tried 2 methods, but not working. A - use expression in activation, but something not right. B - use enableSolver, but probably it needs to place inside of the sourceVolume. If anyone has better ideas, please let me know, thanks sourceVolumeActivation.hipnc
  13. Where can I find the node "Target Deformation" in Dopnetwork ?
  14. actually code should be : (strcmp(prim("/path/to/operator", 0, "name", 0), "density") == 0) || (strcmp(prim("/path/to/operator", 0, "name", 0), "surface") == 0) However, this method won't work because prim does not return density name but will return actual density value. I need to figure out different way.
  15. thanks, then I just remember the simple syntax!