[chuck-users] complex envelopes?

if i wanted an envelope in chucK with 6 breakpoints, how could i do this? i only see two ugens, both stk, envelope and adsr. could i somehow use an array and loop with multiple linear envelopes pasted together? (i think an array would be best, but could just also redifine values over and over). has anyone a sample code of this? has anyone else run across this problem in modular synthesis? i think more ugens would be great! thanks brian