Houdini : SOP | Twist Keep Rotation

SOP | VEX Basic  [.hip file - 04_TwistKeepRot_01.hip ] in preoaration.
Use Copy Sop and Expression.

Houdini : SOP | VEX Basic 01

SOP | VEX Basic  [.hip file - 03_VEX_Basic01_.hip]
Use VEX in AttribWrangle SOP to make attribute and local attribute.

Houdini : ROP | NOT CROP EXR

H15になってデフォルトでEXRのクロップがされてしまうので、その解除のメモ。

NUKE | Match Grade

Houdini | Available attribute in Houdini Engine for Maya

P->position, v->velocity, force->acceleration, life->lifespanPP, Cd->rgbPP, Alpha->opacityPP, pscale->radiusPP. 

Houdini : SOP | Attribute to Rocal Variable

様々なアトリビュートをローカル変数に変換することでSOP内で使用することを可能にする。

Houdini : Memory Leak of DOP

Using a Variable of "HOUDINI_DOP_MAXCACHE" is a method of memory leak.
[ command : hconfig -a ]

SOP to construct motion graphics

I tried to construct this motion graphics using sop only.
Sopの構築だけでなんとなく作ってみました。

Particle Using Normal Force By Volume

"Volume From Attribute SOP : N(normal)" and "Advect By Volumes POP (Up date Velocity)"
Nomal was maked by VOPSOP.

Particle Arrange Using VOPSOP : Volume Sample From File, Volume Gradient From File

VOPSOP : Using "Volume Sample From File", "Volume Gradient From File"

Expression : complement $TX and $TX1

How to complement each scatter points.

Houdini Alembic Export with Unpack Sop.

Using Unpack SOP.
Unpack Sopを使うことでフラグメント単位で別のオブジェクトになってしまうAlembicの特性を制御。
Max,MayaにAlembicを読み込む際にかなり役立つ。

Houdini Alembic - Use Partition Attribute

The making some partition with primitive level.

ROP Alembic Output
Partition Mode : Use Attribute Value
Partition Attribute : Name - この設定にすることでpieceという単位でパーティション分けされる。

Houdini : How to Alembic file with Velocity to 3ds

How to Almebic file with common velocity to 3ds or Maya.

Houdini : Overview of Dynamic Fracturing 01 (Digital Tutors)

I challenged learning Dynamic Fracturing on Digital Tutors.
Voronoi Fracture Points, Voronoi Fracture