copy point attribute problem

[scuy]

I want to copy point one attribute to another attribute.

But it seems not correct.

 

I have point attribute @N , @tangnetv.

 

 

In vex , i tried @N=@tanget.

I hope @N and @tanget be same direction.

But it seems something wrong direction. 

 

I've attached houdini file.

What happen is this ?

 

tes.hiplc

[ikoon]

Hi HIroki,
you have to cast v@tangent like this:
 

@N = v@tangentv;

 

Without v@, Houdini considers only first float of @tangent and casts it into other components.
For example tangent  {-0.520081 , 2.20691e-08 , 0.854117} becomes N {-0.520081, -0.520081, -0.520081}

You may check the Geometry Spreadsheet. 

By the way @N or @v or other common attributes work without v@, just because they are so common that SideFX saved our time so we don't have to type it  

 

EDIT: You may read more about the "Non-float attributes with known types" here in the docs:
https://www.sidefx.com/docs/houdini/vex/snippets.html

 

Edited July 2, 2021 by ikoon

[scuy]

Dear ikoon

Thank you detail expression.

It be clear .

Thanks again!!