use of Sopsolver on deforming Geo

[Nando]

Hello everyone, 

 

i am trying to transfer an attribute say color(for now) to a deforming Geo,  and i am using the sop solver for that, 

it completely works fine for a static geo, but if i say use object transformation , this doesnt work ?? 

 

so is that the solver cant work with the deforming geo, ??? 

 

any help would be great! thanks 

 

a sample scene file is attached  

sopsolver_odforce.hip

[eetu]

You were only using the "previous frame" input inside your sop solver, not the incoming animated geometry.

I added an AttribCopy node there, so that it is using the animated input1 geometry, but copies the point color from the previous frame input.

 

sopsolver_odforce_e.hip

[Nando]

tottaly forgot that! my bad! 

 

thanks alot eetu  

[Nando]

eetu, one more doubt, if u don't mind, i was going through the hip tricks volume 4, where there is a effect like termites eating the car. 

 

if i want to achieve the same kinda a effect, but for a deforming geometry ?? is where my doubt arised. 

 he grabs some point and groups it,  then inside the solver, he opens a point cloud and interates it and adds the searched point inside the same group, this repeats every frame! 

 

all i want is the same effect but for the moving geo,  

 

if u can pin point any solutions it would be great! 

 

just in case  a scene file is attached 

sopsolver2_odforce.hip

[rafaelfs]

Assuming your point numbers won't change, you can just use a group copy SOP.

 

Cheers

sopsolver2_odforce.hip

[Nando]

yea rafaels, that does the job,  

 

but just out of curiosity! cant this be done inside the solver itself ?? is it advisable ??