AdrianLazar Posted January 25, 2011 Share Posted January 25, 2011 (edited) Hello Everyone, Since this is my first post here please let me introduce myself. My name is Adrian Lazar, I'm a 3d artist (generalist) using Softimage - some of my work can be viewed here: http://vimeo.com/channels/adrianlazar3d A couple of months ago I started learning Houdini - tutorials from sidefx.com, Peter Quint's videos on Vimeo and also just browsing OdForce and the community from the official website. It was a slow start and I wanted to quit many times but somehow each time I went back to Houdini... is quite addictive I'm interested to learn as much as I can in all areas of Houdini but at the end I'll focus on shaders and lighting and hopefully modelling. I say hopefully because at least for me modelling is the hardest part to learn in a new package especially since I find the modelling work-flow from softimage almost perfect Of course it's a vey subjective opinion. Anyway... today I was playing with dynamics and I tried to break a column using the voronoi fracture, similar to the tutorial from go procedural. The difference is that my column should be stuck to the ground (like a subway pillar) but when the simulation runs it doesn't act that way. Maybe I can paint the points that I don't want to fracture at all? Like I can paint the bottom of the pillar so it doesn't move or fracture. I think that a picture will describe better what I mean, Thanks, Adrian Edited January 25, 2011 by AdrianLazar Quote Link to comment Share on other sites More sharing options...
Netvudu Posted January 25, 2011 Share Posted January 25, 2011 Hi Adrian, and welcome. From the top of my mind, you got two quick ways to do this: - add a Pin Constrain to the pieces at the base so that they don´t move. That will give you the motion you are after. I have tried this myself and it works perfectly. It´s a bit uncomfortable if there are many pieces, but you usually get this done in about 5 minutes. - Rename the base pieces to something else, so that they don´t get put into the group mask of the RBD Glue Object. Haven´t tried this myself, but it should work...(at least, it does in my mind) Hope this helps. Quote Link to comment Share on other sites More sharing options...
mightcouldb1 Posted January 27, 2011 Share Posted January 27, 2011 (edited) If you want to constrain multiple piece to the floor... the way the voronoi fracture sop works is pretty convenient. Each seed point number will be mapped to the piece group number. All you have to do is know which points need to be constrained... maybe you can apply an attribute called "on" if $TY < 0.1 or something like that. Once you have that group number, you can use a combination of rbd pin constraint and apply relationship. Since the apply relationship node allows you to use a stamp expression in objects connected to its second(green) input, you can use an expression in the constraint activation like... point("/obj/fracturedobject/OUT_ON_ATTR", stamp("../applyrel1", "AFFECTORID", 0), "on", 0) I recommend taking the time to look through this forum if you want to learn about the wonders of the apply relationship node. http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&p=89741&highlight=&sid=372eef439baf8fc29a3d91e201d77187 Edited January 27, 2011 by mightcouldb1 Quote Link to comment Share on other sites More sharing options...
lkw019 Posted February 19, 2011 Share Posted February 19, 2011 (edited) Box through the wall, the wall will not tilt. This effect is how to do it? Please help me. Thanks. rbd_bad.hip Edited February 19, 2011 by lkw019 Quote Link to comment Share on other sites More sharing options...
lkw019 Posted February 19, 2011 Share Posted February 19, 2011 我不想让墙体倾斜,并且球体还要穿过墙体.怎么做? google translate I do not want to tilt the wall, and the ball must pass through the wall. how? Quote Link to comment Share on other sites More sharing options...
lkw019 Posted March 6, 2011 Share Posted March 6, 2011 plz help me . Quote Link to comment Share on other sites More sharing options...
lkw019 Posted March 6, 2011 Share Posted March 6, 2011 An object fixed in the air, smashed by many balls. 1. the object has been stationary. 2. not advance fragmentation. helpme_2.hip Quote Link to comment Share on other sites More sharing options...
derm Posted June 6, 2011 Share Posted June 6, 2011 An object fixed in the air, smashed by many balls. 1. the object has been stationary. 2. not advance fragmentation. This is EXACTLY what I've been looking for. Thanks so much! Quote Link to comment Share on other sites More sharing options...
duanxiaozhi Posted October 2, 2011 Share Posted October 2, 2011 it's weird to see chinese here. Quote Link to comment Share on other sites More sharing options...
yesyes Posted February 27, 2013 Share Posted February 27, 2013 Box through the wall, the wall will not tilt. This effect is how to do it? Please help me. Thanks. increase number of "sub Steps" of dop network Quote Link to comment Share on other sites More sharing options...
lukeiamyourfather Posted February 27, 2013 Share Posted February 27, 2013 I cover this in a lesson on Digital Tutors along with some other fun stuff related to the dynamic fracturing. Shameless self plug. http://www.digitaltutors.com/11/training.php?pid=68 Quote Link to comment Share on other sites More sharing options...
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