🦁 womblewiki : a barebones houdini reference 🤓
nodes chop cop2 dop lop obj out shelf sop top vop
simulation FEM RBD crowds dynamics fluids grains hair other particles pyro vellum
coding bash groups hscript python vex
filter: all arrange audio character combine constraints create device event export import perform shape solve timing utility view
Acoustic Design audio filters and sound materials for the spatial audiosystem.
Agent Imports an animation clip from an agent primitive.
Area Calculates the area under a channel’s graph, which is the same as calculating the integral of a channel, or integrating the channel.
Attribute Adds, removes or updates attributes of the input chop.
Audio In Receives audio input from the analog audio ports or the digitalport.
Band EQ A 14-band equalizer which filters audio input channels in the same way that a conventional band equalizer uses a bank of sliders to filter fixed-frequency bands of sound.
Beat Manually tap the beat of a piece of music, and automaticallygenerate a repeating ramp or pulse that continues tokeep time with the music after the taps stop.
Blend Combines two or more chops in input 2, 3 and so on, by using a set ofblending channels in input 1.
BlendPose Performs multi-dimensional, example-based interpolation of channels.
Channel Creates channels from the value of its parameters.
Channel VOP Contains a VOP network that can manipulate channel data.
Channel Wrangle Runs a VEX snippet to modify channel data.
Channel nodes Channel nodes create, filter, and manipulate channel data.
Composite Layers (blends) the channels of one CHOP on the channels of another CHOP.
Constant Create up to forty new channels.
Constraint Blend Combines two or more chops by using a list of weights specified as parameters.
Constraint Get Local Space Returns an Object Local Transform.
Constraint Get Parent Space Returns an Object Parent Transform.
Constraint Get World Space Returns an Object World Transform.
Constraint Lookat Constrains rotation so it always points toward a target position.
Constraint Object Compares two objects and returns information on their relative positions and orientations.
Constraint Object Offset Compares two objects and returns information on their relative positions and orientations.
Constraint Object Pretransform Returns an Object Pretransform.
Constraint Offset Applies an transformation offset after evaluating a constraint.
Constraint Parent Reparent an object.
Constraint Path Position an object on a path and orient it to the path’s direction.
Constraint Points Position and Orient an object using point positions from a geometry.
Constraint Sequence Combines multiple chops by blending the inputs in sequence.
Constraint Simple Blend Combines two chops by using a single weight specified as a parameter.
Constraint Surface Position and Orient an object using the surface of a geometry.
Constraint Transform Takes translate, rotate, and/or scale channels and transforms them.
Copy Produces multiple copies of the second input along the timeline of the first input.
Count Counts the number of times a channel crosses a trigger or releasethreshold.
Cycle Creates cycles.
Delay Delays the input, and can be run in normal or time-sliced mode.
Delete Removes channels coming from its input.
Device Transform Turns data from device inputs into transform data
Dynamic Warp Time-warps the first input’s clip (the Source Clip)using the second input’s clip (the Reference Clip) as a reference.
Dynamics Extracts any information from a DOP simulation that is accessiblethrough the dopfield expression function.
Envelope Outputs the maximum amplitude in the vicinity of each sample of the input.
Euler Rotation Filter Fixes discontinuity of rotation data after cracking matrices
Export A convenient tool for exporting channels.
Export Constraints Export Constraints Network on any object
Export Transforms Export Transforms to Constraints Network of many objects
Expression Modify input channels by using expressions.
Extend Only sets the "extend conditions" of a chop, which determines whatvalues you get when sampling the CHOP before or after itsinterval.
Extract Bone Transforms Extracts the current world or local space bone transforms from a geometry object.
Extract Locomotion Extracts locomotion from an animation clip.
Extract Pose-Drivers Creates channels from the specified derived transforms, node parameters and CHOP channels for pose-space deformation.
FBX Reads in channel data from an FBX file.
Fan Used for controlling other CHOPs.
Feedback Get the state of a chop as it was one frame or time slice ago.
Fetch Channels Imports channels from other CHOPs.
Fetch Parameters Imports channels from other OPs.
File Reads in channel and audio files for use by chops.
Filter Smooths or sharpens the input channels.
Foot Plant Computes when position channels are stationary.
Foreach Divides the input channels into groups, cooking the contained network for each group.
Function Provides more complicated math functions than found in the Math CHOP such as trigonometic functions, logarithmic functions, and exponential functions.
Gamepad Turns input values for the gamepad or joystick device into channel outputs.
Geometry Uses a geometry object to choose a sop from which the channels will be created.
Handle The "engine" which drives Inverse Kinematic solutions using theHandle object.
Hold Sample and hold the value of the first input.
IKSolver Solves inverse kinematics rotations for bone chains.
Identity Returns an identity transform.
Image Converts rows and/or columns of pixels in an image to CHOPchannels.
Interpolate Treats its multiple-inputs as keyframes and interpolates between them.
InverseKin Generates channels for bone objects based on a bone chain and an endaffector.
Invert Returns an invert transform of the input.
Jiggle Creates a jiggling effect in the translate channels passed in.
Keyboard Turns key presses into channel output.
Lag Adds lag and overshoot to channels.
Layer Mix weighted layers of keyframed animation from multiple Channel CHOPs to a base Channel CHOP.
Limit Provides a variety of functions to limit and quantize the input channels.
Logic Converts channels of all its input chops into binary channels and combines them using a variety of logic operations.
Lookup Uses a channel in the first input to index into a lookup table in the second input, and output values from the lookup table.
MIDI In The MIDI In CHOP reads Note events, Controller events, Program Changeevents, and Timing events from both midi devices and files.
MIDI Out The MIDI Out CHOP sends MIDI events to any available MIDIdevices.
Math Perform a variety of arithmetic operations on and between channels.
Merge Takes multiple inputs and merges them into the output.
Mouse Outputs X and Y screen values for the mouse device.
Mouse 3D Turns input values for the Connexion space mouse into channel outputs.
Multiply Post multiplies all the input transformations.
Network Similar to the Pipe In/Out CHOPs in Network mode.
Noise Makes an irregular wave that never repeats, with values approximately in the range -1 to +1.
Null Used as a place-holder and does not have a function of its own.
Object Compares two objects and returns information on their relativepositions and orientations.
ObjectChain Creates channels representing the transforms for a chain of objects.
Oscillator Generates sounds in two ways.
Output Marks the output of a sub-network.
Parametric EQ Filters an audio clip, and then applies other audio effects.
Particle Produces translate and rotate channels to move Objects according tothe positions of particles in a POP Network.
Pass Filter Filters audio input using one of four different filter types.
Phoneme Translates english text into a series of phonetic values.
Pipe In Pipes data from custom devices into a CHOP, without needing the Houdini Developers' Kit or knowledge of Houdini internals.
Pipe Out Transmit data out of Houdini to other processes.
Pitch Attempts to extract the fundamental pitch of a musical tone from the input audio.
Pose Store a transform pose for later use by evaluating the input.
Pose Difference Computes the difference between two poses.
Pretransform Takes translate, rotate, and/or scale channels and transforms themusing the pretransform of the given object.
Pulse Generates pulses at regular intervals of one channel.
Rename Renames channels.
Reorder Reorders the first input CHOP’s channels by numeric or alphabeticpatterns.
Resample Resamples an input’s channels to a new rate and/or start/endinterval.
Sequence Takes all its inputs and appends one chop after another.
Shift This time-shifts a CHOP, changing the start and end of the CHOP’s interval.
Shuffle Reorganizes a list of channels.
Slope Calculates the slope (or derivative) of the input channels.
Spatial Audio The rendering engine for producing 3D audio.
Spectrum Calculates the frequency spectrum of the input channels, or a portionof the channels.
Spline Edit the channel data by using direct manipulation of cubic or Bezierhandles in the graph of the CHOP.
Spring Creates vibrations influenced by the input channels, as if a mass was attached to a spring.
Stash Caches the input motion in the node on command, and then uses it as the node’s output.
Stash Pose Stashes the bone transforms and pose-drivers for use by the Pose-Space Deform SOP and Pose-Space Edit SOP nodes.
Stretch Preserves the shape of channels and the sampling rate, but resamples the channels into a new interval.
Subnetwork Allows for the simplification of complex networks by collapsingseveral CHOPs into one.
Switch Control the flow of channels through a CHOPnet.
Time Range This converts an input node in Current Frame mode to a Time Range mode by re-cooking it multiple times.
Time Shift This time-shifts a CHOP, re-cooking the node using different time.
Transform Takes translate, rotate, and/or scale channels and transforms them.
Transform VOP CVEX Contains a VOP network that can manipulate transform data.
TransformChain Combines a chain of translate, rotate, and/or scale channels.
Trigger Adds an audio-style attack/decay/sustain/release (ADSR) envelope to all trigger points in the input channels.
Trim Shortens or lengthens the input’s channels.
VEX Waveform This function is a sub-set of the waveform CHOP.
Vector Performs vector operations on a set or sets of channels.
Voice Split The Voice Split CHOP takes an audio track and separates "words" outinto different channels.
Voice Sync The Voice Sync CHOP detects phonemes in an audio channel given someaudio phoneme samples and pro…
Warp Time-warps the channels of the first input (the Pre-Warp Channels)using one warping channel in the second input.
Wave Creates a waveform that is repeated.
?