Intro to Houdini

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Houdini, a procedure oriented 2D,3D graphic application, with built-in package for a lot of simulation operation.

Concept inside Houdini

it is all about asset, anything is a asset, (tool, shelf, node, parameter)

OTL		Operator Type Libraries
	hda	houdini digital asset, file format for asset library which contain lots of assets (Channel Editor, Motion View)
IDO		Internally Defined Operator, built node asset type in houdini
	Chop	(#vop) channel operation, basically a attribute driving network of nodes
	ChopNet
	Cop2
	CopNet
	Dop
	Driver
	Object
	Particle
	Pop
	Shop
	Sop
	Vop
	VopNet
VEX builder operatpr

env file for environment setting

HOUDINI_PATH = "$HOUDINI_PATH;X:/myPath/houdini/HFS/16;&"
HOUDINI_OTLSCAN_PATH = "$HOUDINI_OTLSCAN_PATH;X:/myPath/houdini/HDA_Libs/otls;&"
HOUDINI_TOOLBAR_PATH="$HOUDINI_TOOLBAR_PATH;X:/myPath/houdini/ToolBar/16;&"

start houdini with init script (optionally in full path)
```
houdinifx.exe X:\myPath\123.py
```
houdini start will run 123.py, new session will run 456.py, it will always run pythonrc.py in its search path.
houdini python path environment variable “HOUDINI_PATH”

Houdini project env variables

$HFS/houdini, $HH	houdini environment
$HSITE	store shared houdini resource
$JOB	current work job directory
$HIP	readonly houdini internal scene variable, last saved path

list all configuration of houdini in Shell:
```
hconfig -ap
```

Rohan Dalvi on Vimeo: http://vimeo.com/rohandalvi
Go Procedure on Vimeo: http://vimeo.com/goprocedural/channels
PQ Houdini Tutorial on Vimeo: http://vimeo.com/channels/54102
Flexible Muscle-Based Locomotion: http://vimeo.com/channels/proceduralism/79098420

PySide/PyQt Custom GUI sample:
- http://www.sidefx.com/ja/docs/houdini14.0/hom/cookbook/qt/
HOM: Houdini Object Model API reference for data access in Houdini
- http://www.sidefx.com/ja/docs/houdini14.0/hom/cookbook/

Houdini is same node concept as Nuke when access objects in application, based on a root node “hou” to access object under it,
in Maya.cmds, you are calling Maya to return the data of the object by object string name instead of the object itself
- while OpenMaya api and PyMel in Maya is more like same node concept

Intro to Houdini

Setting and Configuration

Tutorial

Houdini GUI Tool Develop

Concept of Node under root hou