Attribute Growth

[GlennimusPrime]

This one is a little tricky. I have seen many tutorials showing how to expand / grow an attribute from a start point outward, but I'm struggling with expanding an animated attribute.

I have this sphere that accumulates a mask attribute over time, leaving a trail where another object has moved across the surface:


I'd like that mask attribute to expand / grow  outwards until it covers the whole sphere.


File attached:

attribute_spread.hiplc

Edited Thursday at 01:02 AM by GlennimusPrime

[Librarian]

Find ZengChen on Github and Vimeo @GlennimusPrime
 

[konstantin magnus]

Hi @GlennimusPrime, you could measure and over time remap the surface distance from the mask.

attribute_spread_KM.hiplc

[hannes603]

 

infection_on_animated__simple.hip here a vop version

[GlennimusPrime]

Thanks @Librarian @konstantin magnus @hannes603 all really great examples!

Just to throw a spanner in the works, one pretty major issue I forgot to mention was the points I'm working with are disconnected and animated..

I managed to get @hannes603 example working on an animated static point count object by swapping the inputs of the vop inside the solver:


But unfortunately this does not work when I have a changing point count when working with particles - I tried copying the attribute from previous frame onto the current frame using point ID to match attributes, but the entire object is filled almost instantly with the infected attribute.


Any ideas when working with animated changing point count objects?

Updated file attached:
attribute_spread_v2_animated.hiplc

Edited Sunday at 10:38 PM by GlennimusPrime

[Librarian]

https://github.com/linkanr/Infection 

 

[hannes603]

infection on changing point count is usually no problem . it should work directly like here right

pop_infection_on_changing_point_count.hiplc

[GlennimusPrime]

Would love to see that working please @hannes603 Your example file looks incomplete? The infection spread does not work unfortunately.

@Librarian That infection solver looks amazing, but unfortunately I'm unable to install any otls at the studio I'm working.

Edited 8 hours ago by GlennimusPrime