PadZero in string Parameters Houdini

create string parameters keyframe
then edit expression

Python:
hou.node("..").name() + '_%03d' % hou.intFrame()

hou.node("..").name() : parent name 

*/ works for Integers  Floats and Strings*/ 
 '_%03d' % hou.intFrame() : pad3 decimals places  using Frame as base number    

****another method only for strings*****:

n = '4'
print n.zfill(3)
>>> '004'

HScript:

opname("..")+"_" + padzero(3,"$F") 

opname(".."): parent name 
padzero(3,"$F")  :pad3 decimals places  using Frame as base number

RealFLow 2 vray VectorBlur

Use wildcards!  and convert to vrmesh
using ply2vrmesh app

./ply2vrmesh.exe "/Users/chrysl666/Desktop/TNT/VRAY_proxyMesh/meshExp11_01_*.bin" 


Then load one vrmesh file from the sequence  and change its path:
/Users/chrysl666/Desktop/TNT/VRAY_proxyMesh/meshExp11_01_0001.vrmesh

to something like this:
/Users/chrysl666/Desktop/TNT/VRAY_proxyMesh/meshExp11_01_%04d.vrmesh
ready to render using velocity path !

RealFLow 2013 CommandLIne

command line example for meshing in Osx:


"/Applications/RealFlow 2013/RealFlow.app/Contents/MacOS/RealFlow64"  -mesh -range 44 44 "/Users/chrysl666/Desktop/TNT/RF_explosion/RF_explosion.flw"

Smoke FBX to XSI

scale from smoke  : 0.1
bake all animations channels  -  translate , rotate , scale ,  all camera attr ...  

Maya crash Temp Folder

maya saves temp files inside /var/folder
Osx Bash shell command :


open /var/folders/

Multiple objects in copy SOP houdini

From houdini 12.5 help about copySop:


create a switch node and a copy sop

in copy sop turn on Stamp inputs
and create a Variable1 = switch  -----> value1 = fit01(rand($PT),0,(opninputs("../switch1")))


in switch node insert expression connecting the stamp variable :
stamp("./copy1","switch",0)

Move Points along normal HOUDINI

From :  http://forums.odforce.net/index.php?/topic/15659-move-geometry-along-a-point-normal/

peak SOP is your friend.  It transforms the point along the point N, or you can use a point SOP and do a $TX + ($NX * 0.1),  $TY + ($NY * 0.1),  $TZ + ($NZ * 0.1) in the position paramter.  The 0.1 value is the amount you want to move it along the normal.  That expression is doing what the peak SOP does.