of the innovative features of the VECTOR environment is the use of
intelligent agents with an integrated computational emotion model that
can generate the overall dialog and behaviors of non-player characters (NPCs).
The intelligent agents that generate these NPC behaviors are constructed using
the commercially available version of CHI Systems’ intelligent agent
construction toolset, iGEN™.
iGEN™-controlled intelligent agents generate NPC behaviors using a generic
scripting language. Cultural rules
are encoded and mapped to scenario-specific NPC dialog and behaviors.
This provides a set of virtual NPC’s with which the trainee can
interact. Additionally, the NPC model contains an emotional model that
modulates NPC dialog and actions based on underlying trainee actions and dialog.
Future areas of VECTOR development will include use of NPC emotional
state to drive real-time facial animation of NPC avatars, deepening the scenario
to encode additional sets of cultural rule support, and adding additional
features to the NPC emotion model.
emotional variables are controlled by a set of (culture-specific) mappings that
take output from the dialog manager, and from events in the environment and
apply corresponding adjustments to one or more of these variables.
The mechanism can be elaborated to include excitatory and inhibitory
effects between emotional variables, as well as saturation levels and a decay
curve. The emotional state (i.e., vector of emotional variables) influences the
triggering, priority, and execution of cognitive tasks that generate behaviors
and dialog from the intelligent agents.