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About ela1995

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  • Name
    Doanh Luong-Ho
  • Location
    San Francisco
  1. axiom with MOP_spread problem

    Im working on a pyro simulation using axiom solver. I have an animated tiger in scene, I then use MOP_Spread to animate the @mops_falloff from head to tail, then I multiply @mops_falloff with @density to have the density source animated. As you can see the density is smoothly transform from 0 to 1, but when I run the simulation with sub step by 2, there's some point the density spawn even though the density source has not yet reach to the point. Is there anyway to fix this matter? Thks in advance. pyro spread.hip 03_Anim_Xich_Ho_intro.fbx density_source.mp4 axiom_solver_problem.mp4
  2. We can group point in bounding box with group nodes. But how do I do it with vex? select pt in bbox vex.hip
  3. I have colored gradient for each extruded primitive using For Each Loop. How do I do the same thing with vex? I'm not familiar with prim array. Can anyone help me? Thanks in advance. how to foreach prim with vex.hip
  4. how do I rotate the box in scene random between -45 and 45 degree? I mean it's either -45 or 45, no any random degree in between. certain rotate degree.hip
  5. scaling rbd object stop at certain frame

    where should I clamp the value? In SOP Solver where I use Primitive SOP to make it bigger ovettime?
  6. Hi, I have rbd object emit from DOP particle, and I scale each rbd over time by @age. But I want them to stop scale at a certain amount because I feel like they are big enough. How do I make them stop at the red marker size? Thanks in advance, Candy_FireWork.hip
  7. different rotating speed overtime

    thank you. I didn't know abt that tool
  8. firework explode rbd multisolver

    I rebuild the firework system base on firework workflow in Houdini 18 so I can have better control in several parameter. But how do I turn those sphere into rbd object and have them collide each other in a box. I watched the multisolver online from this guy ( ) but I can't figure out how to combine them. Can anyone help me please. Thanks in advance, firework box 2.hip
  9. Hi, I have a simple pop Network simulating the particles. As I copy the box to particles, I want them to rotate overtime. But when I manipulate the rotate in Transform SOP, they move in the same pattern. How do I make each box rotate at different axis on their own, and with different speed? Thanks in advance. different rotation.hip
  10. I learn how to find the center point on internet, but seem like it doesn't apply in this situation. How do I find the exact center point for these primitive? center point for custom primitive.hip random primitive.obj
  11. How do I make the geo not overlapping each other no matter how I scale it up? overlap.hip
  12. I have 3 different geometry I want to copy onto grid's point, I use Copy Stamp with this function: fit01(rand($PT),0,1). I also write the expression on switch VOP like this: stamp('../copy1', random,0). Now I can control the variety as well as the randomness by adding values into expression above. But later I need to put all the controls into a controller so the third person can control it easily. Is there a way to make those expression has a slider control so that I don't have to go back to the node to change the number. I would like to make it have a slider like writing chf('offset'). how to make slider ctrl for expression.hip
  13. wires

    thank you so much
  14. I have grid planes attached randomly on 'grid1'. I scattered points on the smaller grid planes but it's not the result I want. As you can see in the image, the scattered points is not distributed on every grid plane. For each grid plane I have, I want to scattered same amount of point (at least 1 point), and the point will be randomly place. How do I fix it? scattered point on grid plane.hip
  15. I create new points on a geometry with vex primitive: addpoint(0, @P); how do I group all the points I just created? I don't want to go through long version of group combine.