So about a week ago at Midrealm RUM (http://midrealm.org/rum/) I managed to confuse my entire class by mentioning that the triangle piece inset into the skirt of my gown was a godet. So I sort of confusingly explained with no visuals the difference between a gore and a godet. Here is that same description, now with visuals!
The pourpoint is a padded garment, that by most accounts began life as a fitted garment to be worn under armour and assist with fastening armour to the body. Many reenactors wear padded and unpadded pourpoints as an arming cote and fasten their leg and/or arm armour directly to the garment via points either sewn directly to the garment or threaded through leather that has been sewn to the garment. Having made a number of these garments I can attest, though others, to their general comfort while also reducing the encumbrance of the armour. An alternative to the arming cote, and a common method of fastening leg armour to the body amongst people just getting into western martial arts is through the use of a C-belt or weightlifting belt from which the leg armour is hung, this solution has the unfortunate problem of pressing on the sciatic nerve, not very comfortable. While some wear a sleeveless version of the arming cote full mobility of the shoulders and arms can be obtained in a long sleeve version as well, provided the patterning of the sleeve is done correctly.