HDK cumulative append point?

[stkeg]

how can i cumulatively append points in the HDK?

 

for example i have a simple network

 

a

|

b

 

a has 10 points. b is a sop_node that appends a point to the gdp

 

gdp.appendPointOffset();

 

so for each frame, b now has 11 points.

 

what i would like to happen is for the points to accumulate over time. ie. the next frame, the number of points is 12, then 13, etc. but for each frame, it's always going to be 11.  i guess it's because i always going to be 11 because i have 10 points coming into the network at every frame.

 

i guess i need to append the point not to b, but to a? i.e. get the gu_detail from the input?

[edward]

Put your SOP into a Solver SOP:

http://www.sidefx.com/docs/houdini13.0/nodes/sop/solver