Lukich Posted October 31, 2002 Share Posted October 31, 2002 Hi, folks! I have a quick question - can you use POP attributes, such as velocity to drive the geometry transformations when I copy the POPs to geometry? thanks a lot, Luka Quote Link to comment Share on other sites More sharing options...
danteA Posted October 31, 2002 Share Posted October 31, 2002 Why not? When you use a Pop SOP, it copies all the attributes over into SOP land and from there you can just reference them using the dollar ($) sign notation. Quote Link to comment Share on other sites More sharing options...
Lukich Posted November 1, 2002 Author Share Posted November 1, 2002 OK, there's what I'm doing and it doesn't work for some reason: POPs - source grid with a velocity -0.4 >>> group POP (2 random groups)>>>Velocity POP to change a velocity of one of the groups to 0.4. In the SOPs I have boxes being copied onto the particles. I have Copy Template Point Attributes toggled on in the copy SOP. The expression that I use is if($VY>0, 1, 3) I plugged it into the scale box on both the Primitive and the POP side and into the Copy SOP. It doesn't give me an error, but doesn't seem to do anything either. Where is my mistake? Thanks a lot, Luka Quote Link to comment Share on other sites More sharing options...
red4kat Posted November 1, 2002 Share Posted November 1, 2002 Privet Lukich, How's life treating you? Ok what is it are you trying to do? Whenver you're using group SOP or POP you have to specify it's name in the next OP parameter in order for it to work. But I haven't seen your file so I don't know if you did that. You know sometimes things don't work simply because you forgot to add one small thing. But there are many ways you use to achieve the same results in Houdini. Katherine. Quote Link to comment Share on other sites More sharing options...
AndrewVK Posted November 2, 2002 Share Posted November 2, 2002 For example..... Max Velocity swith ForExample.zip Quote Link to comment Share on other sites More sharing options...
AndrewVK Posted November 2, 2002 Share Posted November 2, 2002 Velocity > 0 swith.... Example1.zip Quote Link to comment Share on other sites More sharing options...
Lukich Posted November 4, 2002 Author Share Posted November 4, 2002 Thanks, Andrew! You have saved me from another sleepless night of trying to figure this probem out Quote Link to comment Share on other sites More sharing options...
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