HScript Commands

Reference chart for Houdini scripting commands

Overview

HScript is Houdini's native scripting language. It provides commands for managing nodes, parameters, and scene components through a command-line interface or scripts.
Official Houdini HScript Documentation

HScript Commands Chart

Command▲	Syntax	Example	Description	Category
cd	cd [dir]	cd /obj	Change current directory	Navigation
ch	ch path	ch ../tx	Get channel value	Channels
chch	chch path value	chch tx 5	Set channel value	Channels
chdel	chdel path	chdel tx	Delete channel	Channels
chkey	chkey [-t time] path value	chkey -t 1 tx 5	Set keyframe	Channels
chkeys	chkeys path	chkeys tx	List keyframes	Channels
echo	echo [-n] text	echo $FOO	Print text	Variables
framecopy	framecopy src dst	framecopy 1 2	Copy animation frame	Playback
framedel	framedel frame	framedel 10	Delete animation frame	Playback
glob	glob pattern	glob *.hip	List files matching pattern	Navigation
grpcf	grpcf path	grpcf /obj/geo1	Set group context	Groups
grpcp	grpcp src dst	grpcp group1 group2	Copy group	Groups
grpdel	grpdel group	grpdel group1	Delete group	Groups
help	help [command]	help opadd	Show help	System
history	history	history	Show command history	System
ls	ls [-l] [path]	ls /obj/*	List contents of specified directory	Navigation
objcopy	objcopy src dst	objcopy cam1 cam2	Copy object	Objects
objdel	objdel object	objdel cam1	Delete object	Objects
opadd	opadd [-n] type [name]	opadd box box1	Create new operator	Operators
opcd	opcd [path]	opcd ../	Change operator directory	Operators
opcf	opcf [path]	opcf /obj/geo1	Change current operator context	Operators
opcp	opcp source dest	opcp ../box1 box2	Copy operator	Operators
opdel	opdel [-c] path	opdel box1	Delete operator	Operators
opls	opls [-l] [path]	opls /obj/*	List operator nodes	Operators
opmv	opmv source dest	opmv box1 box2	Move/rename operator	Operators
play	play [start [end]]	play 1 24	Play animation	Playback
pwd	pwd	pwd	Print current working directory	Navigation
quit	quit [-f]	quit	Exit Houdini	System
render	render [options] path	render /out/mantra1	Render node	Rendering
set	set var [value]	set FOO 42	Set variable	Variables
unset	unset var	unset FOO	Unset variable	Variables
viewwrite	viewwrite [options] file	viewwrite image.jpg	Save viewport to image	Viewport