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Found 9 results

  1. Hi everyone, Currently i'm running into an issue where my constraints aren't breaking. I spend a while on figuring out why it doesn't work and I still don't have a clue what i'm doing wrong. My setup at the moment is that I have one curve with 3 constraints 1 hard constraint to keep the wire in place. 1 spring constraint that is pulling the wire down (This is a placeholder for collisions later on. It's just there to apply a force for testing). 1 spring constraint without a strength to measure the angle between the tip and a point somewhere on the curve The thing is, when i put them all in one constraint network and break them based on the angle, nothing happens and i couldn't figure out why. But when i put the spring constraint that is pulling the curve, into another network the breaking works! Is there anybody who can explain why this is happening? Why wouldn't it break with all the constraints in 1 network? Is it because i pinned one of the points of that constraint to a wold position instead of a point on the simulation geometry? That's the only thing i can think if that is different than the other constraints. Thanks! break_constraint.hipnc
  2. vellum hair break [SOLVED]

    Hi, exploring vellum i'm trying to break an hair geo by enabling the "break threshold" option in the "vellum constraint" SOP. I must be missing something on the constraint workflow of vellum because it has no effect at all on the sim :'( I'd be curious to know if any of you managed it ! Thanks vellum_hair_break.hipnc
  3. targeted smoke and debris

    Hi all i have been trying to make a wall fracture as per a punch and then have smoke and debris come off of it, but at the moment smoke comes off of everything all at once , this is the first year i have touched houdini and didn't start till later in the year so i am still a complete beginner , ive compiled the scene so far from a mish mash of tutorials and how i understand it to work, i have attached my hip file and also the abc of the punch rotomated to a sphere. any help will be appreciated Wall_Fracture41.hipnc PunchRotomation.abc
  4. Hallo, I have following problem: If I shatter an Object in Houdini, the smaller pieces get an inaccurate guide geometry for the collisions. The Geometry Representation Type is: Convex Hull. Does anyone know a way to make this representation accurate? Would really appreciate it, as the smaller pieces are only spinning around now... Thanks, Zac ShatterGuideGeometryTestproj.hipnc
  5. hi! I'm facing some kind of issue: I would like to fracture a geo, then create clusters from the voronoi pieces, then be able to break those cluster based on the strenght of their glue attribute. So far I only get this kind of result: A glue strenght of -1 should give me infinite strength right? so why are my pieces breaking appart inside the same cluster ? What am I missing ?? here's a simple hip if you'd like to correct me. Cheers ! voronoi_clusters.hipnc
  6. Impact Glue interaction

    I am struggling to architect what I have in mind and it may be quite simple but... somehow I just don't get how to connect the dots. Attached is a file with a fractured sphere (thin shell) and a small obstacle inside moving fast, I want to break/weaken the glue constraint based on the impact data (may be after a certain force of impact. At the moment the sphere gets moved around by the obstacle, instead the sphere should break on contact with the bullet, but not against the floor. Thanks in advance. PS. All the elements inside the attached scene are using the shelf tools, specially confusing is the ImpactAnalysis. impact_glue_interaction.hip
  7. Hi. I'm working on a tool that allows to selection-paint fracture pieces. It works great on simple things, like spheres, planes or tori, but ... when it gets to a more complex, organic shape, like a human face, and the model has holes, things start getting hairy. The weak link is the Break SOP. Right now it seems to me it's almost unusable on anything complex. The only thing I can think of to fix it right now, is to convert the model to a flat set of patches based on UV's, do the cutting and then wrap it back to its original shape, or replace the Break SOP with something else. Any advice? Best Regards Filip
  8. string/rope breaking tearing

    Hi, I am working on a group project from school which requires me to break a string/rope in a realistic fashion. I have generated the string using a tool I wrote which gives me control on the construction of the string (a.k.a number of threads wrapped around each other). What are the recommendations to create this effect. 1) Do I go the cloth tearing route( I can't seem to find that tool in my version of Houdini) 2) Go the fracturing route 3) Any other recommendations? If you can guide me in the right direction so that I am not shooting in the dark, then it would be much appreciated. Thanks a bunch. Regards, Soumitra Goswami P.S. - My university currently has Houdini 12.5.376 as its latest version.
  9. I posted here (http://forums.odforce.net/topic/20626-flipping-animation/) yesterday but haven't yet received any replies so I will ask a more basic question that should help me solve the problem in my other post. If I have a grid of black points and I colour some of them red, how can I find the nearest red point for the other (black) points. I'm fairly sure it would be: - pcopen - pciterate - if red is > 0.1 But then how would I break out of the pciterate and use that found point, e.g. to get the distance between the found red point and the current black point? Cheers, Mike
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