Waasha Posted September 19, 2014 Share Posted September 19, 2014 Hey all, just a really quick and simple one. I want to delete based on Cd parameter, that I created with vopsop (I don't want to add a color SOP to have a local variable CD, because it would be slower and I'm working with lots of particles), and I'm unable to do so, because the expression @Cd.x>0.5 doesn't work in the blast SOP.. Can anyone explain me why? Thanks! Quote Link to comment Share on other sites More sharing options...
pezetko Posted September 19, 2014 Share Posted September 19, 2014 Set Group Type to Points explicitly on that Blast SOP. 2 Quote Link to comment Share on other sites More sharing options...
Skybar Posted September 19, 2014 Share Posted September 19, 2014 You can add variables with vex as well. In a VOPSOP the Add Attribute VOP is probably the easiest. Quote Link to comment Share on other sites More sharing options...
Waasha Posted September 19, 2014 Author Share Posted September 19, 2014 Thank you, Peter, I really thought that since there are ONLY points, houdini will undersand I want to work on points, since it's Guess from group P.s.: Mario says - Don't look on Houdini forums during your vacantion Quote Link to comment Share on other sites More sharing options...
Waasha Posted September 19, 2014 Author Share Posted September 19, 2014 Thanks Skybar, I know about that option, but I really couldn't understand, why that expression didn't work.. And the problem wasn't in the expression, but - as pezetko correctly sugested - in the Group Type selector of the blast node.. Quote Link to comment Share on other sites More sharing options...
luka_schulz Posted June 12, 2019 Share Posted June 12, 2019 On 9/19/2014 at 5:32 AM, pezetko said: Set Group Type to Points explicitly on that Blast SOP. Old question, but do you mind me asking why one must explicitly set it to Points? Quote Link to comment Share on other sites More sharing options...
Poetsofthefall Posted June 16, 2019 Share Posted June 16, 2019 On 9/19/2014 at 2:51 PM, Waasha said: Hey all, just a really quick and simple one. I want to delete based on Cd parameter, that I created with vopsop (I don't want to add a color SOP to have a local variable CD, because it would be slower and I'm working with lots of particles), and I'm unable to do so, because the expression @Cd.x>0.5 doesn't work in the blast SOP.. Can anyone explain me why? Thanks! I've uploaded a file regarding this. Blast can delete the Primitive Attributes and the groups but not Point Attributes. Even if you promote it to Point it does'nt. Even Detail Attributes can be removed. When I say can be removed I mean based of these categories and conditions. Hope this explains... blast_node.hip Quote Link to comment Share on other sites More sharing options...
dejavu2020 Posted April 6, 2021 Share Posted April 6, 2021 I encounter a similar problem. The @Cd.r > 0 condition only blast first primitive. The reason is very silly: I put spaces in the expression. Removing space (writing as @Cd.r>0, no spaces in between) fixes it. 1 Quote Link to comment Share on other sites More sharing options...
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