“Once an AI has perceived you and identified you as a threat, it drops down into a high level planning system where it determines what types of actions it should perform. Things like staying near a VIP to protect him or her or barrelling down the hallway to take out the interlopers are resolved at this level. This level of logic, in our system, is implemented using behavior trees. They can be very useful for choosing among high level alternatives and goals…[The AI Character] selects the best option (or two) and queues it up to be performed. This may also involve moving to get in range (or better range) and/or possibly moving to take advantage of nearby cover.”

“RAIN’s Behavior Tree Editor allowed us to rapidly re-shuffle our individual behavior nodes; which was extremely helpful near the end of the project.”