Hello

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