Houdini - VEX notes

• Houdini process vertex the similar way as shader

vector ppos = @P;
@P means current point.
@ means either global variable or attribute.

• use index to get the input of a node , from left to right 0, 1 , 2

It is the opinput in the function
example :

• write to the attribute

f@distance = distance; // the attribute is a float
v@flow = displacement; // the attribute is a vector

• add attribute

V@flow = set(0,0,1);
this will add a vector attribute to the current vertex.