No More Retake

3DCG屋さん向けTips&Referenceサイト

menu

Houdini Recipe:Wrangle Memo 01

VEX sentence of Wrangle.

Global Varialbles that frequently used

//SOP
@Cd      //Point Color
@P       //Point Position
@v       //Point Velocity
@ptnum   //Processing Point Number
@pscale  //Particle Scale
@numpt   //Total Point Number
@N       //Normal

//Time
@Frame;  //Frame
@Time;   //Time

 

Attribute read and write

//By Type
f@Float = 1.0; //float
i@ID = @ptnum;  //int
v@Vec = {0,1,2};//vector
u@UV = {4,5};   //vector2
s@Text = "name";//string

//Individual access (Position)
@P.x = @P.x + rand(@ptnum);
@P.y = anoise(@P.y);
@P.z = fit01(@P.z,0,5);

//Individual access (Color)
@Cd = {1,0,0};
@Cd.g = @Cd.g+1;

 

Add Point

vector pos = {0,0,0};
addpoint(geoself(), pos); 

 

Add Primitive(Line)

int prim = addprim(geoself(), "polyline");
addvertex(geoself(), prim, 0);
addvertex(geoself(), prim, 1);

 

Add Primitive(Face)

int nPoly = 3;

if(@ptnum%3 == 0){
    int prim = addprim(0, "poly");
    for(int i=0; i<nPoly; i++){
        addvertex(0, prim, @ptnum+i);
    }
}

(Create the Face everty ptnum order three poins from the input point)


 

Remove Point

if (@ptnum%5==0){
    removepoint(geoself(),@ptnum);
}

(remove the point that ptnum is  multiple of 5 )


 

Remove Primitive

if (@primnum%2==1){
    removeprim(geoself(), @primnum, 1);
}


 

Create Group

if(@ptnum &amp;amp;amp;amp;lt; chi('threshold')){
    i@group_mygroup=1;
}
if(@ptnum == 10){
    i@group_mygroup=0;
}

Set and see the group in the form of [@group_*].
Any of  group name to *.
this group is int type.
Check if they belong to a group・・・ [@group_*==1].
Add to group・・・[i@group_*=1] Remove from the group・・・[i@group_*=0]

 

Create Group (other method)

string gpName = &amp;amp;amp;amp;quot;testGroup&amp;amp;amp;amp;quot;;

for(int i=0; i&amp;amp;amp;amp;lt;@numpt; i++){
  if(@P&amp;amp;amp;amp;gt;0){
        setpointgroup(geoself(), gpName, @ptnum, 1 ,&amp;amp;amp;amp;quot;set&amp;amp;amp;amp;quot;);
    }
}

When making groups of primitive “setprimgroup”.


 

 

Create Parameters from the description
HoudiniWrangleSample

 

 

Samplefile
WrangleSample_01
.hiplc

 

Version:Houdini 14
Wrangle method of description must be careful because there is a case to be changed depending on the version.

 

Related post

There are no comment yet.

このサイトについて

3DCG Tipsサイト。Houdiniの記事が多めです。

RSS

follow us in feedly

アンケート

ほしい?(複数可)

View Results

Loading ... Loading ...

Language Switcher

Archives

  • 2017 (17)
  • 2016 (36)
  • 2015 (64)
  • 2014 (54)
  • 2013 (60)
  • 2012 (54)

スポンサードリンク