killdom

hi i am learning houdini,I have some quesionts about some expressions function of chop,such an `ic(input_index, channel_index, index)`.What does input_index, channel_index, and index mean?what's the differents betwine the input_index and channel_index? thanks in advance.

thaks for ur detailed xplanation. hope H10 will improve help document more. :wink:

this is my first post here.i have saw the basic_stamp tutorial from offical vedio tutorial.i found $PT in a expression.i found it in houdini help document but nothing about $PT meaning,can someone tell me what's short for it?
sorry for my bad en.thanks in advance. :wink: