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Houdini

Insert Some Houdini here houdini session sync.

Introduction

General

  • use fuse node to "remesh" trace node
  • mops set sequence
  • outline on the 3d for 2d lines in gnomon making of mitchels
  • Use enumerate instead of an attribute wrangle. with obj id ptnum
  • houdini shift M cache manager
  • Object merge wild card /obj/plaster/plaster_*/chunk
  • exhelp in the texport. exhelp rand
  • if you connect two mantra node. it will render the first node and then the other.
  • Color pick: middle click on the color box and drag
  • Crash path: C:/Users/BT/AppData/Local/Temp/houdini_temp/
  • houdini is Z+ facing direction
  • Combining Solvers into Multi Solvers
  • lab lots subdivision
  • labs edge damage
  • labs calculation occlusion
  • attribute interpolate
  • object spline solver houdini does not modify stretching.
  • poly split K
  • attribute adjust vector. computes the length of the velocity from the trails sop
  • move to last operation
  • restart selecting
  • clear teamplate.
  • Deformation Wrangle
  • houdini export separate objects. hierarchy on path in the rop node.
  • QWERT on Nodes
  • attribute adjust float node. its like create attribute plus default masking
  • opunhide SOP
  • range @mops_falloff="0.2-0.3" @mask=0-0.1
  • New dashboard with Ctrl+D for documentation look up
  • intersect VEX is like an alternative to the RAY SOP.
  • create group through attributes? use the partition node and in the rule set something like the path @path
  • shift + I. import image reference in Houdini network view
  • space + G (center geo) w to toggle wireframe
  • Again, these would affect Houdini startup time too. If you run "husk -V9 foo.usd" - from a shell you might get a better idea of how husk is spending its time.
  • boolean union instead of vdb workflow. nice din!
  • getting the snow effect through the group node with by normals option.
  • there is also a lab calculate slope node.
  • volume trail as oppossed to just trail for static advection
  • SOP Physics Painter combo with convex decomposition. for convex hull
  • boxcutter
  • mapbox node
  • automatic trim
  • scifi panel generator
  • game jam starter kit

Videos Ref​

  • Houdini 19 Launch Reveal
    • That Nice VFX about portal fx on smoke.
    • Points Particles
    • USD Frustrum Culling
    • Points Instancers.
  • Simulating Fabric Hoses In Vellum (Or_ How To Rip Off Your C4D Friends)
  • Houdini Tutorial Easy Magical Orb Effect for Beginners !
    • that green thingy
  • Flower Garden _ Carl Krause _ Paris HIVE 2023
    • Flower KineFX Animation
  • Sprite Grid - Houdini Tutorial.mp4
    • text based inspired from ash torpe
  • NY HUG - Art Directing Simulations with Houdini
    • Determining the vector direction of the explosion of the debris.
  • Motion Blur Deformation with Vex - Houdini 16.5 Tutorial
    • NPR animation vex deformation.mp4
  • Astract Wave Pattern (Houdini Tutorial) _ j&n
    • That mountain then boolean with multiple grid.
    • It's like quantize but in modelling
  • The World of KNGF Films - Nick Rutten & Alex van der Aa _ 24 Hours of Chaos 2021
    • That houdini scatter points to a mesh then apply alpha brushes to make some painterly look WTF!
  • https://www.reddit.com/r/Houdini/comments/j9goep/compute_velocity_by_animated_float_attribute/
  • Houdini - Megascan Atlas Trace - Tutorial 01 for those alphas.
  • Christmas lights vex animation in Houdini.mp4
    • Nice animation. interval. Modulo. Probably.
  • VFX. Cable with Birds hanging.
    • Houdini procedural Cracks -- Quick Tricks.mkv using RBD Fracture Nice.
  • For VDB Disintegration Again.
    • Houdini Quick Tip_ Volume Adjust Fog SOP.mp4
  • Houdini _ Adhesive FLIP Simulations _ Masterclass.mp4
    • Sticking Flip Fluid like that in the fountain
  • For environment:
    • Creating a Procedural Rocks Setup in Side Fx - Houdini - 01
  • Houdini Tutorial - Custom Ray Tracer in VEX
    • beyond my paygrade:
  • Houdini effects - Point Blending
    • using attribute adjust for blending
  • Houdini _ Create Twisted Cables using Sweep Nodes.mp4
  • Houdini 30s Quick Tip #2 - Vex Intersect Function
  • Houdini Topographical Map Boolean Slicing Tutorial
  • Houdini_ Easiest Mylar Balloon Setup Ever
  • Knitting in 3d_ Building a UV Deformer
  • Houdini Tutorial 1 - Phoenix Disintegration
  • VOP Quarternion WranglignHoudini Tutorial: Rotating Objects While Aligning to Surface
  • Houdini _ Generating Paths Growing on the Surface of a Mesh
    • Using Shortest Path Diay. Nice.
  • https://80.lv/articles/refraction-effect-created-in-houdini/
    • doing that as a transition for dramatic effectd.
  • USD Survival Guide - A Practical Onboarding Guide for Pipeline TDs _ Luca Schell
    • lucascheller.github.io/VFX-USDSurvivalGuide
  • Houdini Tutorial_ Mix Fluids From Image (Reverse it so you can have an image at the end )
  • Houdini Tutorial 04 | Swirly trails
  • Houdini Tutorial_ Melting Things using FLIP. Entagma
  • https://truebones.gumroad.com/l/thCws (Truebones)

General Math​

  • Velocity is not speed. 40 mph is speed. 40 mph south is velocity
  • speed is the magnitude (of length) of velocity = ||v|| = square root (x2 + y2 +z2)
  • acceleration is change of velocity over the change of time.

Masking​

  • Mask from Geo vs Distance by Geometry vs Attribute Transfer vs Attribute copy. attribute copy can be done through ID
  • labs dirt skirt to help on the blending of two different meshes for rendering.
  • mask by feature.
  • mask from geometry

Instances​

  • Cloner
  • s@instance (within Houdini) or s@instancefile (outside Houdini. External File)

USD​

  • Primitives and attributes are the two primary namespaces and objects in USD
  • Primitives are the primary container object in USD

Import/Export​

  • Alembic export. need to be in vertex attribute rather than point attribute.
  • import alembic. unpack (with transfer attributes). then convert to polygons

Shortcuts​

  • Ctrl+Shift+Alt. Creates a reference node
  • Shift + F1. to remove the viewport guide
  • Alt + Shift + C. Gives you a copy of the window
  • Space + G. Center the selected geometry
  • Space + Z to set thumble pivot to the geometry under cursor.
  • Shift + G or Shift + S. Grow and shrink a selection.
  • Shift + P. Select Pattern. If Valid Pattern appears on the upper left side. Hit shift + left or right or up or down arrow.
  • Alt + E. Enlarges the vex expression parameter tab
  • N. Wheel menu to switch on different context.
  • Hold + A + LMB for the partial loop selection
  • Hold + A + MMB for the full loop selection
  • Shift + C to make in circle but need to be in edit node. haha
  • Ctrl + I invert selection.
  • Insert move the pivot with handles