In Bend SOP, how could I control bend value using external attribute?

[Masoud]

Hi guys;

I would like to control bend value of "Bend SOP", using an attribute, So I add a point attribute (called bend), but it doesn't works.

[vicvvsh]

Hi,

as i know this node don't read attributes like that. But you can use point expression in the Bend parameter

point(opinputpath(".", 0), 0, "bend", 0)

this expression read point attribute "bend" from 0 point and return it value.

[Masoud]

21 hours ago, vicvvsh said:

Hi,

as i know this node don't read attributes like that. But you can use point expression in the Bend parameter

point(opinputpath(".", 0), 0, "bend", 0)

this expression read point attribute "bend" from 0 point and return it value.

But this will get just attribute value of point zero...

[vicvvsh]

1 hour ago, Masoud said:

But this will get just attribute value of point zero...

Is the value of bend attribute different at each point? Provide .hip file if you can. It is not clear right now what you want.

[Masoud]

Please take a look at my scene :

bend.hip

[vicvvsh]

2 hours ago, Masoud said:

Please take a look at my scene :

bend.hip

You can't change bend parameter of bend sop like in your scene but you can with expression.

 

bend_01.hip

[Masoud]

15 hours ago, vicvvsh said:

You can't change bend parameter of bend sop like in your scene but you can with expression.

 

bend_01.hip

(First of all, thank you for the hip file)

SO you mean in some Houdini SOPs, we can't use "per points" values to vary the results on each point, right? if so, can I use "foreach point" loops?

 

Edited July 13, 2019 by Masoud

[vicvvsh]

21 hours ago, Masoud said:

 if so, can I use "foreach point" loops?

For what? What are you trying to achieve and what is your end goal?

[Aizatulin]

Hi Masoud,

have you read my answer on sidefx forum?

You can edit the bend wrangle inside the bend node. Just muliply/add your attributes to the related variables. The attributes can be set for each points (check my example).

bendZ.hipnc

[Masoud]

float theta = @bend * ch('rotation');

Hi Aizatulin, thank you

[Masoud]

On 7/14/2019 at 9:54 AM, vicvvsh said:

For what? What are you trying to achieve and what is your end goal?

I want to bend each point based on it's "bend"  attribute value.