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About hi_dini

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  • Name
    Jayden Kim
  • Location
    Seoul, South Korea
  1. Hi I'm making vellum simulation which is advected by volume. and I wanted to change the color of vellum sim into velocity color. But, as you see, in any voxel of boundary box of smoke has few of density and velocity so they have changed even where I don't want to change the color. I just thought if i could cut of all of black voxel in smoke boundary box It wouldn't happen. or, If I can use density data of smoke sim, I can multiply it into my vellum pointwrangle node so If It has low density value, color has not changed. How can I fix this ?? Sorry for my poor English and hope you help me :)) Thank you
  2. Hi I'm just following this tutorial, and when I follow the tutorial exactly, volume collision work well but If I tweak it little bit , It doens't work.. I simulated volume data like this. and I made this sphere to use as collision and did the same thing in the tutorial (make static object by using shelf tool) and Dopnet just shows this little bit of smoke and it doens't work well like before I just followed tutorial. What's the problem? there is enough empty space in sphere and volume. so I just guessed 'maybe bounding box of volume shouldn't have any penetration with sphere'. but hmm well.. It wasn't .. What can I do to fix this problem ? help me~~!
  3. [SOLVED] Control Pin point in Vellum ?

    Oh god, this is perfect !! I had never thought about controlling the mass attrib Thank you for reply, Solve this.
  4. [SOLVED] Control Pin point in Vellum ?

    Thanks for reply and I tried your suggestion. but It doesn't work... When I check geometry solver of vellum solver, group:pin changed successfully but, simulation doesn't change. I think this node in Vellumcloth SOP node affect to pinsrc value and It caused this problem. but It isn't updated anymore TT
  5. Hi guys, I'm trying to make something with Vellum system but now suffering some problems. What I wanna make is, Pin point group is disabled after 30 frames. I tried to use switch SOP node and to control 'group_pin_src' node in Vellum cloth Sop node. It didn't work and I think I should try it in Vellum solver node. but I don't have any idea with this node. Give me some helps please ! Here's my hip file vellum_Pin.hip
  6. When I use shelf tools like about destruction or pyro, Houdini makes rest node and rest field. and I don't know where can I use it. I think rest node for destruction and rest field in pyro are completely different but I don't know how can I use it. I'm the beginner of Houdini and so .. help me ! Sorry for my English btw TT
  7. question about "Quaternion rotation"

    during made those things, I just tought "Should I have to make quaternion to matrix ?, then why are they saying 'quaternion is more efficient on caculating' ?? at last they has to convert it to matrix. Am I worong .. ?? The key point that I want to know is, 'How can I rotate object by using quaternion ?' I use box object as this node's input and it worked as good. but I want to rotate it by using quaternion .. I don't know I wrote right ,,, sorry for my English again haha
  8. question about "Quaternion rotation"

    I just tweaked a little bit and made tihs by using quaternion. but, is this efficient than upper one ?? Give me advice so I can make this properly please !
  9. "https://www.youtube.com/watch?v=t9yoUkFzInA" This is tutorial link and I made this node with that. and I heard about quaternion that it has only 4 vectors so We can use it more efficient way to rotate object. But this tutorial's node convert quaternion to matrix at last. so If I want to use this node properly and I expected, using quaternion. Which part that I should change ?? Sorry for my poor English and Help me wizards !
  10. Thank you guys, I just made little sphere and tried to change all of parameters as you guys let me know When I finished , I'll upload at here Thank you very much !!
  11. I'm trying to make some flame thrower fx but have some problems with control such fields like temperature, heat and etc .. for fx what I make, I wanted to make some fire from dragon's mouth. It's own scale is big so, I imagined that the fire would be more smaller than this pic I captured. If I make the fire more smaller, Which parameter should I have to control ? I thought, Shape tap in pyro solver would be used for controling shape of smoke. and I changed some parameters on Combustion tab, but I couldn't change shape of fire itself. Help me and sorry for my English
  12. Hi I've got some geometry and want to use it as collision geomtery. when I change this geomtry to volume using by vdbfrompolygons node, It looks like second pic. I think It's because of unfilled geomtry, but problem is All geomtries I've got are unfilled like this one. My purpose was make geometry to volume and use it as volume sample at staticobject node in dopnet. How can I fix it ? or If you know other efficient ways to make unfilled geometry as collision geometry, let me know please. Thanks for read, My English is poor sorry
  13. Yes ! This is what I wanted Thank you very much for your help !! Is this different with pump function in shelf tool ? In 'Flip source' node, I can find Pump operator and I tried to use it. but Anyway ! Here is the different way to make it Thank you !
  14. I'm trying to make custom velocity field in fluid dopnet. but I couldn't find any tutorial with this.. there are only version before H17 and some are about Pyro. when the fluid particles passes that box on right of the view, velocity pushes particles to its own velocity direction. Can you tweak my hip file for it ? I'm having problems with how can I make box to vel field, and set volume source node up in dopnet to use it as volume velocity. If you help me, It will be really big pleasure to me custom_velField.hip
  15. There is any problem with licensing, but when I render this shot. It just looks like this. Lights doesn't affect to scene now. Is there any additional option about this problem ?? Help me !