creating noise in glue strength

[roberttt]

Hi,

I just want to create different strength values in glue constraint but i could not understand that how i can set this cd up for my glue strength. 

here is my reference

https://letshoudini.wordpress.com/2016/09/18/037-earthquake-building-collapse-rd-01/

and my hip file.

 

cd_constraint.hipnc

[3dome]

f@strength = @Cd.x; 

[char]

I was doing a similar thing not that long ago. I promoted the Cd attribute from point to primitive and used a PRIMITIVE Wrangle to set up my constraint attributes (which I'm guessing you missed as I can see the @strength in your POINT attributes).

As mentioned above when Cd is on primitives just add a Prim Wrangle and do the following f@strength = @Cd.x.

In my example I just used a paint node, used red and green color, painted areas where I wanted the glue to be strong and areas where I wanted it to break easier then did an IF statement in a wrangle just checking for the color on the primitive and if it was green = strength 1000, if red = strength 10.  

 

Edited August 10, 2018 by char
formatting

[roberttt]

thanks guys.

[roberttt]

9 hours ago, char said:

I was doing a similar thing not that long ago. I promoted the Cd attribute from point to primitive and used a PRIMITIVE Wrangle to set up my constraint attributes (which I'm guessing you missed as I can see the @strength in your POINT attributes).

As mentioned above when Cd is on primitives just add a Prim Wrangle and do the following f@strength = @Cd.x.

In my example I just used a paint node, used red and green color, painted areas where I wanted the glue to be strong and areas where I wanted it to break easier then did an IF statement in a wrangle just checking for the color on the primitive and if it was green = strength 1000, if red = strength 10.  

 

Thanks Char, by the way how can i write that expression you mentioned above like your your example because i am new in houdini little bit.

[char]

The way I used it was in a Primitive Wrangle.

if(@Cd.r > 0.1){

    s@constraint_name = "Glue";
    @strength = 1000;
}
else
    s@constraint_name = "Hard";

Obviously this was using Red and Green color to set it up initially.

There might be several ways to achieve it, but for what I was testing, it worked. 

[roberttt]

On 2018-08-13 at 3:08 AM, char said:

The way I used it was in a Primitive Wrangle.

if(@Cd.r > 0.1){

    s@constraint_name = "Glue";
    @strength = 1000;
}
else
    s@constraint_name = "Hard";

Obviously this was using Red and Green color to set it up initially.

There might be several ways to achieve it, but for what I was testing, it worked. 

thanks Char