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Search the Community: Showing results for tags 'source volume'.
Found 3 results
Hello everyone! I am very new to Houdini an need some help. I am trying to rebuild ""FLUID SOURCE" node with container settings "collision" to use it later in DOP with "Smoke Solver" and importing collision with "Source Volume". Just now have made with VDB surface field called it "collision" and create one more VDB from attribute "v" called it "collisionvel". I see difference between FLUID SOURCE and VDB collision is in first one create 3 scalar velocity fields and the second create one vector velocity field. Setup with VDB now have a problem my density ( made with "Source Volume") : theres no adding to density from SOP , but it works like copy. I will appreciate for any help! Thanks! P.S. Also i am interesting to rebuild it all without smoke solver, so feel free to comment all around this problem!
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
Hi, I am looking for expression to automatically activate source volume node in DOP by input object(VDB, houdiniSDF). This is because sim is broken, if the sourceVolume set to collision but there is no SDF primitive. my idea is that the inside of the node, sourcevolume > SOP solver(source_density)>objectMerge(fetch_density). After this node, I add primitiveWrangle: if(@name == "density" || @name == "surface") f@activeSwitch =1; then I made float parameter(activation), and paste expression. prim(".", "activeSwitch", 0) After that, I plan to paste the parameter value to sourcevolume>activation. Then it should automatically set activation ON/OFF. The wrangleVEX is working but prim's expression is not working. How can I fix it??