tagosaku Posted June 24, 2017 Share Posted June 24, 2017 Hi, I am looking for auto-activation for source volume node in DOP based on an input object(VDB, houdiniSDF). This is because sim is broken, if the sourceVolume set to collision and there is no SDF primitive(@name=density or surface). So far, I tried 2 methods, but not working. A - use expression in activation, but something not right. B - use enableSolver, but probably it needs to place inside of the sourceVolume. If anyone has better ideas, please let me know, thanks sourceVolumeActivation.hipnc Quote Link to comment Share on other sites More sharing options...
tagosaku Posted June 24, 2017 Author Share Posted June 24, 2017 I solved it by F1's help, thanks activation> (strcmp(prims("../../IN_coll", 0, "name"), "density") == 0) || (strcmp(prims("../../IN_coll", 0, "name"), "surface") == 0) Quote Link to comment Share on other sites More sharing options...
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