In the parameter UI, apart from the ramp parm, it also have other ui called ramp1pos, ramp2pos for controlling points on the ramp. When you do node.parms(), it returns all of them. Is it possible to tell if ramp1pos is part of the ramp parm?

Thanks,
Ben

Ramps are implemented as multi-parms. If the base multiparm is named “ramp”, for each point, there is a parm named “ramp<n>pos” (the horizontal position along the ramp) and “ramp<n>value” (the vertical value at that point in the ramp).

To tell if a given parameter is part of a multiparm (ie, either the pos or value of a point in a ramp), use the .isMultiParmInstance()method of Parm or ParmTuple. You can get a reference to the parent multiparm with .parentMultiParm().

If you have a reference to the parent multiparm (“ramp”) you can use the .multiParmInstances()method to get a list of ramp1pos, ramp1value, ramp2pos, ramp2value, etc. objects.

Hope this helps

That's what I need. Thanks!