Bend by color attribute?

[Werner]

Hi,

I'm trying to get the bend SOP in H15 to only be affected on points with red in the color channel(paint SOP), but I'm failing badly.

Any attribute I create is ignored by the bend SOP.

 

Is there any voodoo I should know about to get this to work?

 

[kungFu]

Hi Werner,

 

Set the color on your geo to black. Paint the parts red you want. Create a point group and switch it to expression and put something like this in the filter expression field.

@Cd >.01

Make sure you put the group in the bend SOP. I'm not positive this is what you actually want because the transition between deformed polys and not deformed ones will be abrupt.

 

-james

[Werner]

Hi James,

 

Yes that is what I wanted to avoid. I did exactly that, but it looks crap.

 

[loopyllama]

Hey Werner,

So you want to bend a model, then blend in the bent model based on color? I did exactly that and it looks okay. I added some color with a nice falloff. did a bend, did an attribute transfer between the bent version and the original version, then did an attribute wrangle with:

@P = fit01(@Cd.r,@P,point(1,"P",@ptnum));

Then bent parts now have a nice falloff because the color controlling it has a nice falloff.

[loopyllama]

Here is an example of bending by color:

bend_by_color.hipnc