Houdini Group Syntax
Confused about Group Syntax? Wondering how to AND operation in Group Syntax?
Say, I am using a Blast node to delete some points in SOP context, and want to:
delete the points which "name" attrs are "inside", I can use this syntax:
delete the points which "height" attrs are greater than 10, I can use this syntax:
It is simple if the condition is only one, but how about combining the two above?
like, delete the points which "name" attrs are "inside" AND "height" attrs are greater than 10? Use this syntax:
Does it look confusing? Let me explain.
The ^ is to remove some points from the results of preceding pattern (the preceding pattern is @name=inside), and what are the points it will remove from the preceding pattern?
The points are those matching this !@height>10 pattern, which "height" attrs are less or equal to 10. So once these points are removed. We will get
The final points matching both @name=inside AND @height>10.
So ^! combination means "remove those that are not ... ".
Does it sound good now?