stephenl Posted May 14, 2012 Share Posted May 14, 2012 When I use clustered pre-fractured geo in Bullet, the pieces explode apart. In RBD it works fine (but to slow for me) and in Bullet with non-clustered geo it works fine. I turned up the resolution of the collision geo but it didn't help. Obviously it is because of the convex geo that the sim is erratic, but I would really rather use it than concave voronoi pieces. I played with the padding, but putting it high enough to stop explosions makes the pieces roll on the ground and such like they are round. lol, that will not work. I was thinking of somehow importing concave pieces and glueing them together in groups but that is much more work and has more limitations than importing clustered pieces. Thanks. Quote Link to comment Share on other sites More sharing options...
Marc Posted May 14, 2012 Share Posted May 14, 2012 You mean concave pieces are the cause right? Bullet handles convex shapes very well... concave, not so much. M Quote Link to comment Share on other sites More sharing options...
goldleaf Posted May 14, 2012 Share Posted May 14, 2012 Yeah, concave pieces aren't as stable - but by default they aren't enabled. In the Bullet Collision Data tab, uncheck 'Polygons as Convex Hulls'. Sometimes it works great, other times not so great. Quote Link to comment Share on other sites More sharing options...
stephenl Posted May 14, 2012 Author Share Posted May 14, 2012 Yep, that's what I meant Unchecking 'Polygons as Convex Hulls' seems to delay the explosion, instead of all pieces flying at frame 1, 1 piece starts a chain reaction. Guess I'll just use convex voronoi pieces for now. Quote Link to comment Share on other sites More sharing options...
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