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lazza79

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Everything posted by lazza79

  1. Hi guys, i have an urgent task and I’m running out of time. i have an animation of 2 characters walking over leaves, I tried using bullet but they are unstable, probably because they are intersecting... (I didn’t use constraints, I just activate the packed rbd when the feet are nearby) do you have an idea? have anyone of you made an FX like this and can give me an advice? thank you very much lazza79
  2. Hi magicians, Just a curiosity: when you open a file, do you know if it's possible to have the files listed as "24h" instead of AM/PM ? I couldn't find it in the preferences (in H15) and my system is already set to 24h time format. Thank you! Lazza79
  3. Hi Guys, I am trying to solve a small problem but I can't figure it out precisely. I want to use a Solver SOP in order to have a color decay effect. Let's say I decide that the color decays 15% each frame, so I put @Cd.x *= 0.85: in my wrangle The problem happens if I increase the number of substeps to 2 or 4, in that case, obviously, the decay rate of 15% will be each interaction and not each frame. Could you please help me with this? In the attached image, I use a random to decide how much to decrease the color of the point, based on @dist attribute... Cheers! Andrea
  4. Solver SOP and substeps

    Yes, that is what I experienced. I will try now to find the complement of the decay (1-0.85 = 0.15) and multiply that for the @TimeInc. But I am not sure this will work...
  5. Solver SOP and substeps

    Thank you! I think I did something wrong because I tried that but I couldn't see the effect. I'll have a go again! Cheers! Andrea
  6. Hi Guys, I am trying to achieve this effect: a rigid body (like a bullet) hitting a round target hanging from a tree. Somehow, I managed to have the rope holding the target with a cloth + rbd. Now I fractured the target but I cannot use the glue constraint because I get a warning (attached). I had something wrong with the names, so now the constraints are working, but I still don't get the warning. The merge is already set on "mutual"... Can someone please enlight me ;-) ? Maybe there is also a better way to achieve this effect... How do you guys will achieve this effect? Thank you guys! Cheers, Lazza79
  7. Constraints with RBD and Cloth

    I found out that I had some other problems in this scene and remade it using rbd only with cone constraints to simulate the rope. Cheers! Lazza79
  8. Helix Along Curve

    Hi Guys, these are excellent examples, but if I try to do the spiral for a curve with direction 0,1,0 the spiral is not happening... I am sure it has something to do with the trigonometry of the thing but I don't know how to solve it... Any idea? Cheers! Andrea spiralize_vertical.hipnc
  9. Help needed from clueless student

    Hi, I am not an expert (still learning myself) but I think your setup is a bit wrong. I fixed it using a copy sop, to copy the spheres on the points and an assemble sop to create the packed geometries. I just added the ground plane and not the other grids you had. In order to control the bounciness of the balls, try to play with the "bounce" parameter in the Physical tab of the ground plane and the rbd packed object. Cheers! Lazza79 Ball Pit Ball Simulation_packed.hipnc
  10. Help with vex

    Hi Guys, I would like to ask your help for some code. i have some primitives (constraints) disposed like an umbrella (one on top and many on the bottom, disposed round-is (like an umbrella). Imagine now a sphere going along the scene, when the sphere touches any of the extreme points, il would like to transfer a parameter from the sphere to ALL the connected points. I think I figured out how to do it but I don't know the code: I would like to know how to, having one of the 2 points of the segment, to know what is the number of the opposite point. Thank you! Cheers! Lazza
  11. Help with vex

    Great! Thank you! I'll check it ASAP! Cheers! Lazza79
  12. Help with vex

    Yes, that is similar. Almost what I want. The difference is that I would like also the 2 stars that are touched bu the polygon, fully become red. I see in your video that when they are touched just one or 2 legs become red. I would like that if one leg becomes red, all the other legs connected do. Thank you very much!!! Cheers! Lazza79
  13. Help with vex

    hmmm, no. I have several "umbrellas" sometime near to each other. I'm afraid that using neighbor function may get a point form another umbrella... Thank you! Lazza79
  14. Hi Guys, I am getting an annoying warning on H16 if I have an "explodedview" node in my scene. Nothing strange or causing me problems but it's really annoying. May this be because I imported an OTL done with H15.5 that had an explodedview node inside? Can anybody help? Thank you, Cheers! Lazza79
  15. Bug was solved on daily 548: The Connectivity SOP now has a parameter to choose whether to create a local variable or not.
  16. I just submitted the bug to SideFX. Other friends saw this. Thank you very much for your help!
  17. That's strange. I uninstalled H16, reinstalled and loaded the non-commercial version and I still have that problem. I moved all the folders inside $HOME (houdini 14-15-15.5-16) to a subfolder and I still have that. I just open an empty scene, put down a sphere (polygon mesh) scatter points, voronoi, exploded view. Save, open again, ERROR. This is sooo strange. EDIT: I just tried to install H16 on a different clean PC. The problem is 100% reproducible. I am now trying to install a daily build to see if the problem is there as well.
  18. So you say that if I remove all my hda from Houdini, the error will likely go away? Sorry, I am still learning...
  19. Hi Guys, I have a simulation with roughly 50K RBDs and 27K constraints. All the rbds are packed (using mid button H16 says that they occupy 40mb instanced) but still, when I perform the sim, it takes up all my ram 63.8Gb. Is there a way I can debug this? How do I know what is taking memory? Thank you! Lazza
  20. The strange thing is that if I open a new scene without using any HDA I still get that error. How can I "reset" this? Thank you very much for your help! Lazza79
  21. actually, this result is just after 30/40 frames. Most of the rbds are still inactive... You mean outside the dop? I mean, where the dops "points" for the RBD packed geos?
  22. Ops, I just realized that I can enable "memory stats" in the Performance editor.... Now I know where is the mem consumption, the problem is I don't know why...
  23. Thank you Atom, Performance monitor, afaik, actually only returns the times of the single processes... am I wrong? My MB can be upgraded to 128 but it's too expensive... Thanks! Lazza79
  24. Hi, I noticed that when I export a camera from maya with Alembic, Houdini sets the camera at 1280x720. I noticed this because I exported 1080p and 4K footage and the camera is always the same. Is there a reason for this? Where do I change this in maya? Cheers! Andrea
  25. Hi Guys, I am preparing a new scene in Houdini and I need to track the video first. I made both reference images and video feed (4K) with my iphone 7 Plus. Does anybody know what's the sensor size and focal length of both video and photo cam? (the wide one). I am finding different values on internet and I wonder if anyone has done this before and if anyone knows where to find such information. Thank you! Cheers! Lazza79 P.S.: I already tracked the video but the data came out from the tracking software do not match the data I found on internet 8.03mm focus and 0.95x0.53mm for the video camera. The focal length of the lens (according to the EXIF of the pictures) should be 3.99mm, not 8.03...
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