Globe

This HDA contains a VOP network that creates alpha channels based on the color of a texture map.

Return Highest Point Position with VEX

Return the highest position of a point in a set of points. This is accomplished using point clouds in VEX.

Circuit Board

Model of a circuit board and a heat sink in SOPs.

Message Passing

Using a displacement shader to control a surface shader's parameters.

Noise Monitor

A quick look at noise.

Lagged Lights

This file demonstrates how to extract impact data from DOPs and create lighting effects using CHOPs.

Python and CHOP Waveforms

How to generate waveforms with Python or CHOPs in Houdini.

L-system City

A procedural urban environment designed with l-system floor plans and procedural boolean operations.

Generate Instance

This HDA allows a user to use instancing with objects, shaders, lights and shadows.

All Instancing

A brief overview of rendering attributes and a hip file using all types of instancing: Object, Shader, Light and Shadow instancing.

L-system Buildings

Create buildings with windows using Houdini's Lsystem SOP.

Rippled Surface

Create rippled mountain effect in VOPs.

Environment Blur Mirror

Create a blurred mirror using the reflectlight() function.

Impact Chop Lights

The Dop Chop Lights node can look at any DOP network, and create lights based on impacts.

Shadow Instancing

Using the vm_shadow attribute in light instancing to get instanced shadows.

Using HDRI in Houdini

The tutorial is beginner level and teaches how to setup HDRI in Houdini.

Water point algorithm

Waves of water using a point SOP expression.

Glow light

A glowing light effect that works on grids.

Alpha Spheres

Using VOPs to create alpha spheres!

VOP Alpha Sprites

Sprites with alpha in Houdini.

TV screens

Multiple televisions copy stamped with different images on each screen.

Train

A subway train car modeled in Houdini.

Tornado

A tornado made of particles in Houdini built by Steve Toyama.

Boolean operations with Sursect

Cut through objects with the Surfsect SOP.

Starfield

VOPs stars.

Staircase

Procedural staircase built in Houdini.

Sanjunoto

Model of Sanjunoto.

Revolve

Revolving curves to create geometry.

Arrows attached to particles

Arrows attached to particles shooting across a field.

Organic Displace

Displacement using the VEX Choppy Water SHOP.

Music Notes

Particles with music notes attached... flowing music!

Volumetrics

Basic volumetrics using a meta cloud shader.

DNA to filmstrip

A strand of DNA converts into a filmstrip.

Palm Tree

A palm tree in Houdini using SOPs.

Fuzzy Vision

Glowing eyes with fuzzy displacements in VEX.

Spiral Staircase

A spiral staircase modeled in SOPs.

Random Normal Rotations

A great way to randomize normals without copy stamping geometry.

Bone Rig

A basic digital asset of a bone rig.

Trippy water tunnel

A watery tunnel created with VOPS.

Velocity Attribute Blur

Use the velocity attribute to give motion blur to a static object.

Dragonfly

A dragonfly animated with sinusoidal waves.

Some Notes on DOPs

Some Notes taken at a DOPs lecture given by Craig Zerouni, as well as various DOPs hip files.

Scratched Shader

A scratched displacement shader in VOPs.

Displacement Shader

A displacement shader to create the surface of a planet.

HDA Class

The outline for the Houdini Digital Asset Course taught by Dan Lynch.

Outline

HDA class outline.

Agenda

HDA class agenda.

Plan

HDA class plan.

Alternative Energy

An alternative energy artwork envisaged by Eric Valdivia, rendered by Dan Lynch.

Arpeggio

Generation of arpeggio for .chan output.

Rails SOP

A basic use of the Rails SOP.

Restaurant

A basic model of a restaurant.

Bones

Introduction to Bones using a very basic rig.

Copy Stamping

This project introduces copy stamping different pieces of geometry onto particles.

Siding

This uses a point SOP expression to generate siding from a grid.

Cross Product

This demonstrates using the cross product in an expression in prepping normals for copy stamping.

Synth

Library of CHOPs used to create synthetic sound and music.

Helix

Use trigonometry to create a helix!

Unit Circle

The radians of the unit circle...a trigonometry must.

figure 8 Klien bottle

The Klein bottle is a closed nonorientable surface that has no inside or outside.

Iso Surface: Heart

A heart-shaped surface given by the sextic equation

Iso Surfaces: Barth Decic

Algebraic surfaces which can be represented implicitly by a polynomials of a degree of 10 in x, y, and z.

Water in a Cave

Water in a cave with fake caustics using COPs and VOPs.

Telephone

A telephone piece modeled in SOPs.

Rain Ripples

Dynamic ripples based on particles passing through a grid.

Pop Events

Using a popevent inside of POPs.

Split

Cool splitting particles in POPs.

Piano

A model of a piano keyboard in SOPs. You can use the chopcf() expression to play the keys.

TVs and speakers

Model of a huge entertainment system of tv monitors and speakers in SOPs.

Mixing Board

Model of a mixing board in SOPs.

Kitchen

Model of a kitchen in SOPs.

Lattice and Spring SOP

The lattice and spring SOPs in action!

Laptop

A model of a laptop in SOPs.

Instancing Light Letters

Instancing lights in the shape of letters.

Ice Break

Breaking geometry by connecting primitives to particles.

Cartoon Head

A model of a "human" head in SOPs.

Guitar

A model a a Les Paul guitar in SOPs.

Particles Fire

Creating fire with particles.

Drums

Model of a drum set in SOPs.

Deforming Images

When compositing with COPs, you can deform an image based on another images values using the Deform COP.

Curtain

Creating a curtain with the Spring SOP.

Clock

A model of a clock in SOPs.

Bulge

The Bulge SOP.

Creating custom scripts

Creating scripts, and calling them as commands in Houdini...

Argument count

Get the number of arguments passed into a script.

If statement with expression

Evaluate a for loop based on a expression.

Evaluate expression

Using expressions in hscript.

if statements

A basic if statement in Hscript.

While and Read for user input

Get correct user input using a while loop and the read hscript command.

Loading with exread

Reads an expression that is stored inside of a digital asset.

Setting environment variables

Setting environment variables inside an expression function.

Binary Fire

Using copy stamping to attach 1's and 0's to a particle system.

Dopfield

A custom dopfield expression for extracting data from a dynamics simulation in DOPs.

Foreach and Opfind

Powerful searching with foreach and opfind.

While Loops

A basic while loop in Hscript.

Foreach and Opname

Renaming a series of nodes with a foreach loop and opname.

For Loop

A basic for loop in Hscript.

Foreach Loop

A basic foreach loop in Hscript.

Ramp Noise

This project uses Noise CHOP and a ramp to generate noise, then applys it to a geometry's points.

Particles on a path

This file demonstrates how to get particles to fly along a path.

noise

An attempt to re-create the noise() expression.

Balls in Half Pipe

Using non-volume based collision detection to allow RBD Objects to roam around a skateboard ramp.

Particle Attributes

Accessing particle attributes in VOPs.

Musical Scales

Using CHOPs to generate a MIDI file.

Convert Audio to MIDI

Running audio through a Pitch CHOP will return the frequency and the volume. You can use this data to then generate MIDI or other computer generated sounds and music.

Oscillator

Copy stamping with oscillations using the math behind pitch.

smooth

Anatomy of a smooth function.

Delayed Read Archives

Setting up Delayed Read archives from Houdini for RenderMan.

What are Houdini Digital Assets?

A brief overview of a Houdini Digital Asset.

On Event Scripts

Special variable for OnEvent scripts with a digital asset.

Dynamic Pull-Down Menus

Dynamic dropdown menu listing mantra nodes with a menu script.

HDA - OS Integration

Adding contents to HDAs and saving contents to disk from HDAs.

Running Scripts

Calling a script that is stored in a digital asset.

Disabling Parameters

Disabling parameters of digital asset.

Creating Parameters

Ways to create or promote parameters in an HDA.

Shading Quality

Visualizes the effects of anti-aliasing in regards to Shading Quality.

Noise Light

A VEX noise light.

OPmenu

Create a custom item in the menu when you right-click on a node.

Round based on s and t

The mathematical power of the power used on a VEX displacement shader.

3D Text

This HDA creates 3D extruded text with rounded edges.

Mantra Manager

This digital asset allows users to control all mantra nodes in a file from one single interface.

Light Instance Normal Lookat

Light instancing with a normals lookat. This allows user to control the direction of the instanced lights with a handle.

Repeat

A repetitive, tiled, displaced, surface.

Reflect Light

Using the reflectlight() function in VEX.

Modulus

A VEX surface shader using the modulus function.

Point Cloud Christmas

Use VEX to create a point cloud geometry opertator.

Wave CHOP

Simple use of the wave CHOP.

Layered Shader

A way to make a layered Shader in VOPs.

Attractor POP

Using an Attractor POP.

Jump Menu

Setting up the magical wonders of the jump menu in Houdini's file browser.

Custom Config

How to set up a custom config folder.

Custom Bin

How to set up a custom script path when using Houdini.

OTL On Load

This is the file that loads Digital Assets when you first run Houdini.

Shader Instancing

Using the vm_surface attribute with object instancing to instance shaders!

Instance Hscript

A cool script written in Hscript that will setup instanced lights and objects.

Object Instancing

Using the instance attribute to instance multiple objects.

Shadow Pass

Shadow pass generated in Hscript.

Scripting Render Tricks

Creating directories and using sed for render-time text-edits.

Reflection Pass

Hscript used to generate a reflection pass.

Matte

Hscript used to get objects to render as a matte, creating a render pass.

Generate Script

Generating render scripts.

Global Illumination

Global illumination using ambient occlusion.

Depth Of Field

Rendering with depth of field.

Light Instancing

Using the vm_light attribute and instancing lights!

icomposite

Compositing images... command line style.

Sub-surface scattering

Basic SSS (Sub-surface scattering)

Breaking Geometry

This demonstrates using the connectivity and partition SOPs in association with the cookie SOP to break geometry in prep for RBD.

Configure VEX

How to configure your workflow with custom VEX.

Fake Rim Light

Fake rim-lighting with a surface shader in VEX.

Noise

A noise surface shader in VEX.

Light Model Switch

Create a light model switch parameter on a surface shader in VEX.

xyzdist

xyzdist() finds the distance between the nearest point on a primitive and the point specified.

centering with centroid

Centering based on the centroid of an object.

Extracting a vector

Extracting a vector in a custom expression function.

fit frame range

Fit a frame range with a custom expression function.

mlookat

Helps return values needed for transformations to occur.

origin

ORIGIN() returns the value needed to translate an objects value to another.

primgrouplist

Return a list of a group names containing primitives in a given SOP.

run

The run expression is used to execute Hscript.

vangle

vangle() finds the angle between two vectors.

vtorigin

Extract position information using the vtorigin expression.

Hscript VOP network

A way to make a vop network in Hscript.

string switching

Switching the values in strings to be the opposite of the other.

shop finder

Hscript that generates render passes.

rename operators

A quick way to rename operators.

Checking arguments

Checking arguments in Hscript.

Basic Projection Map

A light projection map in VEX.

Writing files

Write out a file out to disk using Hscript.

UNIX tools

Houdini to UNIX commands.

Bracing with variables

Basic bracing techniques for setting variables in Hscript.

Faking an array

Faking an array in Hscript.

system

Embed an operating system command in Hscript.

source

Execute a script from a given source in Hscript.

otcontentadd

Add files to a digital asset using Hscript.

opscript

Reference a script in Hscript.

oppwf

Print the current working node in hierarchy.

opparm

Change parameters with Hscript.

oppane

Open a new parameter editor with Hscript.

opinput

Find the name of node that is in the input of another.

opfind

Find nodes within your Houdini session with opfind.

opchange

Search and replace parameter text in Hscript.

opbop

Modify bundles in Hscript.

continue

This will continue to the next loop if the statement is true.

chls

chls lists parameters within node.

chadd chkey

Add channels and keyframes in Hscript.

Siding

This uses a point SOP expression to generate siding from a grid.

Modulus Major Scale

Use the power of modulus to convert any notes into a perfect Major Scale.

Beats

Generate triggers at perfect intervals for placement of music notes.

Python to Houdini

This class will open a port in Houdini an emulate a terminal with the ability to send and receive commands.

Chop Normals

Demonstrates how to blend normals with CHOPs.

Caustics

Using photon maps to generate caustic lighting effects.

Color Map

Set geometry color attributes with vex code based on an image.

Color Displace

Displace geometry points based on an image with VEX.

Displacement Map

Using an image to displace geometry.

Dominos

Creating dynamic dominos in DOPs.

Spin

Basic spinning particles using the cross product.

Plastic Lighting Model

Using VEX to create a basic plastic lighting model.

Texture Map and UVs

Applying a texture map and uv coordinates.

City Builder HDA

This procedural modeling Operator Type Library allows you to build fly-through animations fast while building a city based on a curve.

Denting with POPs

Denting with particles inside of DOPs.

Alpha Para-Perp

Some VEX utilizing the para and perp parameters within a surface shader.

Pscale Cd and Alpha

Create interpolation between values in particle attributes.

Displace with Noise

Brownian Noise vs. Turbulence

Colormap Blur

An attempt to blur a displacement.

Basic Light

A basic VEX light shader.

Basic Texture Map

A basic texture map in VEX.