Juzwa Posted July 8, 2016 Share Posted July 8, 2016 Hi, So I've been trying to do some bullet destruction. And on my fractured pieces geometry I get some pretty unpredictable behaviour. I noticed I dont get that on not fractured geometry. THIS IS THE VID So I tried changing the objects bullet shape: convex, concave, box, spheres... and so on. I played with collision padding to make the shapes differ, but nothing even better. And at the end I even tried to change my object thickness. Because I also though that maybe its too thin. But still nothing. So Im getting those weird flying objects and not sure how to fix it. The only idea I have is to leave it like that and sim. And when it comes to object instancing I just remove the weird behaving points. However whenever I add more elements the behaviour getts weirder and weirder. Is there any better way to fix those flying shapes? Quote Link to comment Share on other sites More sharing options...
f1480187 Posted July 8, 2016 Share Posted July 8, 2016 Looks like constraints problem: scrambled or bad parameters. Low substeps also may introduce errors. Quote Link to comment Share on other sites More sharing options...
Juzwa Posted July 8, 2016 Author Share Posted July 8, 2016 Yeah I thought about constraints as well. But I set for glue only. And those weird pieces have broken constraints. Unless the broken constraint can still controll the piece. By logic it should not, but I would not be surprised by now Quote Link to comment Share on other sites More sharing options...
DennisSchmidt Posted July 8, 2016 Share Posted July 8, 2016 Weird. But I kinda like the motion Are you using any forces? Looks like some kind of wind/turbulence. Any chances uploading the file? Would be interesting to see what's causing this awesome effect. Quote Link to comment Share on other sites More sharing options...
Juzwa Posted July 8, 2016 Author Share Posted July 8, 2016 I just managed to fix the issue. So I deleted all my old objects and created them again. Every each object separately (RBD Packed Object), no copying. Before my objects were copied (and then changed changed SOP paths, etc). Thats it. And it works. No weird stuff. No funny business Quote Link to comment Share on other sites More sharing options...
DennisSchmidt Posted July 8, 2016 Share Posted July 8, 2016 Nice. So I guess that the names were mixed up and therefore the constraints would try to hold the wrong pieces together...maybe Quote Link to comment Share on other sites More sharing options...
Juzwa Posted July 9, 2016 Author Share Posted July 9, 2016 Well names were not mixed up. I mean copied objects and created objects, as they are now, were the same. So there should be no issues . But I guess there was some link from copied objects to the bullet, and that coused the issue. Im not that familiar in DOPs yet. Maybe I should have tried investigating that was wrong in geometry spredsheet. Quote Link to comment Share on other sites More sharing options...
Farmfield Posted July 9, 2016 Share Posted July 9, 2016 Unpredictable bullet behaviour is something that dates back to the JFK assassination. [badum tish] Sorry, I could not resist. Quote Link to comment Share on other sites More sharing options...
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